; ****************************************************************************************
; Copyright © [11/21/1999] Scenix Semiconductor, Inc. All rights reserved.
;
; Scenix Semiconductor, Inc. assumes no responsibility or liability for
; the use of this [product, application, software, any of these products].
; Scenix Semiconductor conveys no license, implicitly or otherwise, under
; any intellectual property rights.
; Information contained in this publication regarding (e.g.: application,
; implementation) and the like is intended through suggestion only and may
; be superseded by updates. Scenix Semiconductor makes no representation
; or warranties with respect to the accuracy or use of these information,
; or infringement of patents arising from such use or otherwise.
;*****************************************************************************************
;
; Filename: EightUART_1_01.src
;
; Authors: Vikram .S. Bidkar
; Software Engineer
; Adamya Computing Technologies Pvt. Ltd.,
;
; Revision: 1.01
;
; Part: SX28 - AB9932AB, SX52 - AB0004AC
; Freq: 50MHz
;
; Compiled using: SX-Key, SASM
;
; Date Written : Aug 22, 2000
;
; Last Revised : Sept 14, 2000
;
; Program Description:
;
; This code implements 8 separate UART's in software for baud rates of
; 1200,2400,4800,9600,19200, or 57600 bps depending on the rate selected
; for each UART by the user. Three separate demonstration programs are
; supplied to aid the user in the familiarization process. For more
; information on byteTransfer, stringTransfer, or fileTransfer, see
; page 14 of Application Note #40 available from http://www.scenix.com.
;
; Interface Pins:
;
; rs232Rxpin1 ra.2 ;UART1 receive input
; rs232Txpin1 ra.3 ;UART1 transmit output
; rs232Rxpin2 rb.2 ;UART2 receive input
; rs232Txpin2 rb.3 ;UART2 transmit output
; rs232Rxpin3 rb.4 ;UART3 receive input
; rs232Txpin3 rb.5 ;UART3 transmit output
; rs232Rxpin4 rb.6 ;UART4 receive input
; rs232Txpin4 rb.7 ;UART4 transmit output
; rs232Rxpin5 rc.0 ;UART5 receive input
; rs232Txpin5 rc.1 ;UART5 transmit output
; rs232Rxpin6 rc.2 ;UART6 receive input
; rs232Txpin6 rc.3 ;UART6 transmit output
; rs232Rxpin7 rc.4 ;UART7 receive input
; rs232Txpin7 rc.5 ;UART7 transmit output
; rs232Rxpin8 rc.6 ;UART8 receive input
; rs232Txpin8 rc.7 ;UART8 transmit output
;
;
; Revision History:
; 1.01 Program description re-written. Minor cosmetic changes implemented.
; Jamie Aitken (09/14/00).
;
;
;*******************************************************************************************
; Target SX
; Uncomment one of the following lines to choose the SX18AC,SX20AC,SX28AC,SX48BD, SX52BD.
;*******************************************************************************************
;SX18_20
SX28AC
;SX48_52
;*******************************************************************************************
; Assembler Used
; Uncomment the following line if using the Parallax SX-Key assembler. SASM assembler
; enabled by default.
;*******************************************************************************************
;SX_Key
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 1 at the required baud rate
;*******************************************************************************************
;uart1baud1200 ;baud rate of 1.2 Kbps
;uart1baud2400 ;baud rate of 2.4 Kbps
;uart1baud4800 ;baud rate of 4.8 Kbps
uart1baud9600 ;baud rate of 9.6 Kbps
;uart1baud1920 ;baud rate of 19.2 Kbps
;uart1baud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 2 at the required baud rate
;*******************************************************************************************
;uart2baud1200 ;baud rate of 1.2 Kbps
;uart2baud2400 ;baud rate of 2.4 Kbps
;uart2baud4800 ;baud rate of 4.8 Kbps
uart2baud9600 ;baud rate of 9.6 Kbps
;uart2baud1920 ;baud rate of 19.2 Kbps
;uart2baud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 3 at the required baud rate
;*******************************************************************************************
;uart3baud1200 ;baud rate of 1.2 Kbps
;uart3baud2400 ;baud rate of 2.4 Kbps
;uart3baud4800 ;baud rate of 4.8 Kbps
uart3baud9600 ;baud rate of 9.6 Kbps
;uart3baud1920 ;baud rate of 19.2 Kbps
;uart3baud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 4 at the required baud rate
;*******************************************************************************************
;uart4baud1200 ;baud rate of 1.2 Kbps
;uart4baud2400 ;baud rate of 2.4 Kbps
;uart4baud4800 ;baud rate of 4.8 Kbps
uart4baud9600 ;baud rate of 9.6 Kbps
;uart4baud1920 ;baud rate of 19.2 Kbps
;uart4aud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 5 at the required baud rate
;*******************************************************************************************
;uart5baud1200 ;baud rate of 1.2 Kbps
;uart5baud2400 ;baud rate of 2.4 Kbps
;uart5baud4800 ;baud rate of 4.8 Kbps
uart5baud9600 ;baud rate of 9.6 Kbps
;uart5baud1920 ;baud rate of 19.2 Kbps
;uart5aud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 6 at the required baud rate
;*******************************************************************************************
;uart6baud1200 ;baud rate of 1.2 Kbps
;uart6baud2400 ;baud rate of 2.4 Kbps
;uart6baud4800 ;baud rate of 4.8 Kbps
uart6baud9600 ;baud rate of 9.6 Kbps
;uart6baud1920 ;baud rate of 19.2 Kbps
;uart6aud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 7 at the required baud rate
;*******************************************************************************************
;uart7baud1200 ;baud rate of 1.2 Kbps
;uart7baud2400 ;baud rate of 2.4 Kbps
;uart7baud4800 ;baud rate of 4.8 Kbps
uart7baud9600 ;baud rate of 9.6 Kbps
;uart7baud1920 ;baud rate of 19.2 Kbps
;uart7aud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; Uncomment one of the following to run the uart vp for UART 8 at the required baud rate
;*******************************************************************************************
;uart8baud1200 ;baud rate of 1.2 Kbps
;uart8baud2400 ;baud rate of 2.4 Kbps
;uart8baud4800 ;baud rate of 4.8 Kbps
uart8baud9600 ;baud rate of 9.6 Kbps
;uart8baud1920 ;baud rate of 19.2 Kbps
;uart8aud5760 ;baud rate of 57.6 Kbps
;*******************************************************************************************
; If BYTE is to be send on the UART, then uncomment the following
;*******************************************************************************************
;byteTransfer
;*******************************************************************************************
;If STRING is to be send on the UART, then uncomment the following
;*******************************************************************************************
stringTransfer
;*******************************************************************************************
;If FILE is to be transfard from one UART to another UART then uncomment the following
;*******************************************************************************************
;fileTransfer
;*******************************************************************************************
;*******************************************************************************************
; Assembler directives
;
; High speed external osc, turbo mode, 8-level stack, and extended option reg.
; SX18/20/28 - 4 pages of program memory and 8 banks of RAM enabled by default.
; SX48/52 - 8 pages of program memory and 16 banks of RAM enabled by default.
;*******************************************************************************************
IFDEF SX_Key ;SX-Key Directives
IFDEF SX18_20 ;SX18AC or SX20AC device directives for SX-Key
device SX18L,oschs2,turbo,stackx_optionx
ENDIF
IFDEF SX28AC ;SX28AC device directives for SX-Key
device SX28L,oschs2,turbo,stackx_optionx
ENDIF
IFDEF SX48_52 ;SX48/52/BD device directives for SX-Key
device oschs2
ENDIF
freq 50_000_000
ELSE ;SASM Directives
IFDEF SX18_20 ;SX18AC or SX20AC device directives for SASM
device SX18,oschs2,turbo,stackx,optionx
ENDIF
IFDEF SX28AC ;SX28AC device directives for SASM
device SX28,oschs2,turbo,stackx,optionx
ENDIF
IFDEF SX48_52 ;SX48BD or SX52BD device directives for SASM
device SX52,oschs2
ENDIF
ENDIF
id '8UART VP' ;
reset resetEntry ; set reset vector
;*******************************************************************************************
;--------------------------------------Macro's--------------------------------------
; Macro: _bank
; Sets the bank appropriately for all revisions of SX.
;
; This is required since the bank instruction has only a 3-bit operand, it cannot be used to
; access all 16 banks of the SX48/52. FSR.7 (SX48/52bd production release) needs to be set
; appropriately, depending on the bank address being accessed. This macro fixes this.
;
; So, instead of using the bank instruction to switch between banks, use _bank instead.
;*******************************************************************************************
_bank macro 1
noexpand
bank \1
IFDEF SX48_52
IF \1 & %10000000 ;SX48BD and SX52BD (production release) bank instruction
expand
setb fsr.7 ;modifies FSR bits 4,5 and 6. FSR.7 needs to be set by software.
noexpand
ELSE
expand
clrb fsr.7
noexpand
ENDIF
ENDIF
endm
;*********************************************************************************************
; Macro: _mode
; Sets the MODE register appropriately for all revisions of SX.
;
; This is required since the MODE (or MOV M,#) instruction has only a 4-bit operand.
; The SX18/20/28AC use only 4 bits of the MODE register, however the SX48/52BD have
; the added ability of reading or writing some of the MODE registers, and therefore use
; 5-bits of the MODE register. The MOV M,W instruction modifies all 8-bits of the
; MODE register, so this instruction must be used on the SX48/52BD to make sure the MODE
; register is written with the correct value. This macro fixes this.
;
; So, instead of using the MODE or MOV M,# instructions to load the M register, use
; _mode instead.
;*********************************************************************************************
_mode macro 1
noexpand
IFDEF SX48_52
expand
mov w,#\1 ;loads the M register correctly for the SX48BD and SX52BD
mov m,w
noexpand
ELSE
expand
mov m,#\1 ;loads the M register correctly for the SX18AC, SX20AC
;and SX28AC
noexpand
ENDIF
endm
;*********************************************************************************************
; INCP/DECP macros for incrementing/decrementing pointers to RAM
; used to compensate for incompatibilities between SX28AC and SX52BD
;*********************************************************************************************
INCP macro 1 ; Increments a pointer to RAM
inc \1
IFNDEF SX48_52
setb \1.4 ; If SX18 or SX28AC,keep bit 4 of the pointer = 1
ENDIF ; to jump from $1f to $30,etc
endm
DECP macro 1 ; Decrements a pointer to RAM
IFDEF SX48_52
dec \1
ELSE
clrb \1.4 ; If SX18 or SX28AC, forces rollover to next bank
dec \1 ; if it rolls over. (skips banks with bit 4 = 0)
setb \1.4 ; Eg: $30 ---> $20 ---> $1f ---> $1f
ENDIF ; AND: $31 ---> $21 ---> $20 ---> $30
endm
;*********************************************************************************************
; Error generating macros
; Used to generate an error message if the label is intentionally moved into the second page .
; Use for lookup tables.
;*********************************************************************************************
tablestart macro 0 ; Generates an error message if code that MUST be in
; the first half of a page is moved into the second half
if $ & $100
ERROR 'Must be located in the first half of a page.'
endif
endm
tableEnd macro 0 ; Generates an error message if code that MUST be in
; the first half of a page is moved into the second half
if $ & $100
ERROR 'Must be located in the first half of a page.'
endif
endm
;*****************************************************************************************
;----------------------------------- Memory Organization ---------------------------------
;*****************************************************************************************
;*****************************************************************************************
;------------------------------ Data Memory address definitions --------------------------
; These definitions ensure the proper address is used for banks 0 - 7 for 2K SX devices
; (SX18/20/28) and 4K SX devices (SX48/52).
;*****************************************************************************************
IFDEF SX48_52
global_org = $0A
bank0_org = $00
bank1_org = $10
bank2_org = $20
bank3_org = $30
bank4_org = $40
bank5_org = $50
bank6_org = $60
bank7_org = $70
ELSE
global_org = $08
bank0_org = $10
bank1_org = $30
bank2_org = $50
bank3_org = $70
bank4_org = $90
bank5_org = $B0
bank6_org = $D0
bank7_org = $F0
ENDIF
;*****************************************************************************************
;-------------------------------- Global Register definitions ----------------------------
; NOTE: Global data memory starts at $0A on SX48/52 and $08 on SX18/20/28.
;*****************************************************************************************
org global_org
flags0 equ global_org + 0 ; stores bit-wise operators like flags
; and function-enabling bits (semaphores)
;-----------------------------VP: RS232 Receive-------------------------------------------
rs232Tx1Flag equ flags0.0 ;indicates the Uart1 tx
rs232Tx2Flag equ flags0.1 ;indicates the Uart2 tx
rs232Tx3Flag equ flags0.2 ;indicates the Uart3 tx
rs232Tx4Flag equ flags0.3 ;indicates the Uart4 tx
rs232Tx5Flag equ flags0.4 ;indicates the Uart5 tx
rs232Tx6Flag equ flags0.5 ;indicates the Uart6 tx
rs232Tx7Flag equ flags0.6 ;indicates the Uart7 tx
rs232Tx8Flag equ flags0.7 ;indicates the Uart8 tx
flags1 equ global_org + 1 ; stores bit-wise operators like flags
; and function-enabling bits (semaphores)
rs232RxFlag1 equ flags1.0 ;indicates the reception of a bit from the UART1
rs232RxFlag2 equ flags1.1 ;indicates the reception of a bit from the UART2
rs232RxFlag3 equ flags1.2 ;indicates the reception of a bit from the UART3
rs232RxFlag4 equ flags1.3 ;indicates the reception of a bit from the UART4
rs232RxFlag5 equ flags1.4 ;indicates the reception of a bit from the UART5
rs232RxFlag6 equ flags1.5 ;indicates the reception of a bit from the UART6
rs232RxFlag7 equ flags1.6 ;indicates the reception of a bit from the UART7
rs232RxFlag8 equ flags1.7 ;indicates the reception of a bit from the UART8
isrTemp0 equ global_org + 2 ; Interrupt Service Routine's temp register.
; Don't use this register in the mainline.
localTemp0 equ global_org + 3 ; temporary storage register
; Used by first level of nesting
; Never guaranteed to maintain data
localTemp1 equ global_org + 4 ; temporary storage register
; Used by second level of nesting
; or when a routine needs more than one
; temporary global register.
localTemp2 equ global_org + 5 ; temporary storage register
; Used by third level of nesting or by
; main loop routines that need a loop
; counter, etc.
;*********************************************************************************
;-------------------------- RAM Bank Register definitions ------------------------
;*********************************************************************************
;*********************************************************************************
;*********************************************************************************
; Bank 0
;*********************************************************************************
org bank0_org
bank0 = $
;*********************************************************************************
; Bank 1
;*********************************************************************************
org bank1_org
bank1 = $
rs232TxBank1234 = $ ;UART bank
rs232Txhigh1 ds 1 ;hi byte to transmit for UART1
rs232Txlow1 ds 1 ;low byte to transmit for UART1
rs232Txcount1 ds 1 ;number of bits sent for UART1
rs232Txdivide1 ds 1 ;xmit timing (/4) counter for UART1
rs232Txhigh2 ds 1 ;hi byte to transmit for UART2
rs232Txlow2 ds 1 ;low byte to transmit for UART2
rs232Txcount2 ds 1 ;number of bits sent for UART2
rs232Txdivide2 ds 1 ;xmit timing (/4) counter for UART2
rs232Txhigh3 ds 1 ;hi byte to transmit for UART3
rs232Txlow3 ds 1 ;low byte to transmit for UART3
rs232Txcount3 ds 1 ;number of bits sent for UART3
rs232Txdivide3 ds 1 ;xmit timing (/4) counter for UART3
rs232Txhigh4 ds 1 ;hi byte to transmit for UART4
rs232Txlow4 ds 1 ;low byte to transmit for UART4
rs232Txcount4 ds 1 ;number of bits sent for UART4
rs232Txdivide4 ds 1 ;xmit timing (/4) counter for UART4
;*********************************************************************************
; Bank 2
;*********************************************************************************
org bank2_org
bank2 = $
rs232TxBank5678 = $ ;UART bank
rs232Txhigh5 ds 1 ;hi byte to transmit for UART5
rs232Txlow5 ds 1 ;low byte to transmit for UART5
rs232Txcount5 ds 1 ;number of bits sent for UART5
rs232Txdivide5 ds 1 ;xmit timing (/4) counter for UART5
rs232Txhigh6 ds 1 ;hi byte to transmit for UART6
rs232Txlow6 ds 1 ;low byte to transmit for UART6
rs232Txcount6 ds 1 ;number of bits sent for UART6
rs232Txdivide6 ds 1 ;xmit timing (/4) counter for UART6
rs232Txhigh7 ds 1 ;hi byte to transmit for UART7
rs232Txlow7 ds 1 ;low byte to transmit for UART7
rs232Txcount7 ds 1 ;number of bits sent for UART7
rs232Txdivide7 ds 1 ;xmit timing (/4) counter for UART7
rs232Txhigh8 ds 1 ;hi byte to transmit for UART8
rs232Txlow8 ds 1 ;low byte to transmit for UART8
rs232Txcount8 ds 1 ;number of bits sent for UART8
rs232Txdivide8 ds 1 ;xmit timing (/4) counter for UART8
;*********************************************************************************
; Bank 3
;*********************************************************************************
org bank3_org
bank3 = $
rs232RxBank1234 = $
rs232Rxcount1 ds 1 ;number of bits received for UART1
rs232Rxdivide1 ds 1 ;receive timing counter for UART1
rs232Rxbyte1 ds 1 ;buffer for incoming byte for UART1
rs232byte1 ds 1 ;used by serial routines for UART1
rs232Rxcount2 ds 1 ;number of bits received for UART2
rs232Rxdivide2 ds 1 ;receive timing counter for UART2
rs232Rxbyte2 ds 1 ;buffer for incoming byte for UART2
rs232byte2 ds 1 ;used by serial routines for UART2
rs232Rxcount3 ds 1 ;number of bits received for UART3
rs232Rxdivide3 ds 1 ;receive timing counter for UART3
rs232Rxbyte3 ds 1 ;buffer for incoming byte for UART3
rs232byte3 ds 1 ;used by serial routines for UART3
rs232Rxcount4 ds 1 ;number of bits received for UART4
rs232Rxdivide4 ds 1 ;receive timing counter for UART4
rs232Rxbyte4 ds 1 ;buffer for incoming byte for UART4
rs232byte4 ds 1 ;used by serial routines for UART4
;*********************************************************************************
; Bank 4
;*********************************************************************************
org bank4_org
bank4 = $
rs232RxBank5678 = $
rs232Rxcount5 ds 1 ;number of bits received for UART5
rs232Rxdivide5 ds 1 ;receive timing counter for UART5
rs232Rxbyte5 ds 1 ;buffer for incoming byte for UART5
rs232byte5 ds 1 ;used by serial routines for UART5
rs232Rxcount6 ds 1 ;number of bits received for UART6
rs232Rxdivide6 ds 1 ;receive timing counter for UART6
rs232Rxbyte6 ds 1 ;buffer for incoming byte for UART6
rs232byte6 ds 1 ;used by serial routines for UART6
rs232Rxcount7 ds 1 ;number of bits received for UART7
rs232Rxdivide7 ds 1 ;receive timing counter for UART7
rs232Rxbyte7 ds 1 ;buffer for incoming byte for UART7
rs232byte7 ds 1 ;used by serial routines for UART7
rs232Rxcount8 ds 1 ;number of bits received for UART8
rs232Rxdivide8 ds 1 ;receive timing counter for UART8
rs232Rxbyte8 ds 1 ;buffer for incoming byte for UART8
rs232byte8 ds 1 ;used by serial routines for UART8
;*********************************************************************************
; Bank5
;*********************************************************************************
org bank5_org
bank5 = $
MultiplexBank = $
isrMultiplex ds 1
;*********************************************************************************
; Bank 6
;*********************************************************************************
org bank6_org
bank6 = $
;*********************************************************************************
; Bank 7
;*********************************************************************************
org bank7_org
bank7 = $
IFDEF SX48_52
;*********************************************************************************
; Bank 8
;*********************************************************************************
org $80
bank8 = $
;*********************************************************************************
; Bank 9
;*********************************************************************************
org $90 ;bank 9 address on SX52
bank9 = $
;*********************************************************************************
; Bank A
;*********************************************************************************
org $A0 ;bank A address on SX52
bankA = $
;*********************************************************************************
; Bank B
;*********************************************************************************
org $B0 ;bank B address on SX52
bankB = $
;*********************************************************************************
; Bank C
;*********************************************************************************
org $C0 ;bank C address on SX52
bankC = $
;*********************************************************************************
; Bank D
;*********************************************************************************
org $D0 ;bank D address on SX52
bankD = $
;*********************************************************************************
; Bank E
;*********************************************************************************
org $E0 ;bank E address on SX52
bankE = $
;*********************************************************************************
; Bank F
;*********************************************************************************
org $F0 ;bank F address on SX52
bankF = $
ENDIF
;*****************************************************************************************
;---------------------------------- Port Assignment--------------------------------------
;*****************************************************************************************
RA_latch equ %00001000 ;SX18/20/28/48/52 port A latch init
RA_DDIR equ %00000100 ;SX18/20/28/48/52 port A DDIR value
RA_LVL equ %00000000 ;SX18/20/28/48/52 port A LVL value
RA_PLP equ %00001100 ;SX18/20/28/48/52 port A PLP value
RB_latch equ %10101000 ;SX18/20/28/48/52 port B latch init;intial value affter reset
RB_DDIR equ %01010100 ;SX18/20/28/48/52 port B DDIR value;0=Output,1=Input
RB_ST equ %11111111 ;SX18/20/28/48/52 port B ST value;0=Enable,1=Disable
RB_LVL equ %00000000 ;SX18/20/28/48/52 port B LVL value;0=CMOS,1=TTL
RB_PLP equ %11111100 ;SX18/20/28/48/52 port B PLP value;0=Enable,1=Disable
RC_latch equ %10101010 ;SX18/20/28/48/52 port C latch init;intial value affter reset
RC_DDIR equ %01010101 ;SX18/20/28/48/52 port C DDIR value;0=Output,1=Input
RC_ST equ %11111111 ;SX18/20/28/48/52 port C ST value;0=Enable,1=Disable
RC_LVL equ %00000000 ;SX18/20/28/48/52 port C LVL value;0=CMOS,1=TTL
RC_PLP equ %11111111 ;SX18/20/28/48/52 port C PLP value;0=Enable,1=Disable
IFDEF SX48_52
RD_latch equ %00000000 ;SX48/52 port D latch init;intial value affter reset
RD_DDIR equ %11111111 ;SX48/52 port D DDIR value;0=Output,1=Input
RD_ST equ %11111111 ;SX48/52 port D ST value;0=Enable,1=Disable
RD_LVL equ %00000000 ;SX48/52 port D LVL value;0=CMOS,1=TTL
RD_PLP equ %00000000 ;SX48/52 port D PLP value;0=Enable,1=Disable
RE_latch equ %00000000 ;SX48/52 port E latch init;intial value affter reset
RE_DDIR equ %11111111 ;SX48/52 port E DDIR value;0=Output,1=Input
RE_ST equ %11111111 ;SX48/52 port E ST value;0=Enable,1=Disable
RE_LVL equ %00000000 ;SX48/52 port E LVL value;0=CMOS,1=TTL
RE_PLP equ %00000000 ;SX48/52 port E PLP value;0=Enable,1=Disable
ENDIF
;*****************************************************************************************
;--------------------------------- Pin Definitions ---------------------------------------
;*****************************************************************************************
rs232Rxpin1 equ ra.2 ;UART1 receive input
rs232Txpin1 equ ra.3 ;UART1 transmit output
rs232Rxpin2 equ rb.2 ;UART2 receive input
rs232Txpin2 equ rb.3 ;UART2 transmit output
rs232Rxpin3 equ rb.4 ;UART3 receive input
rs232Txpin3 equ rb.5 ;UART3 transmit output
rs232Rxpin4 equ rb.6 ;UART4 receive input
rs232Txpin4 equ rb.7 ;UART4 transmit output
rs232Rxpin5 equ rc.0 ;UART5 receive input
rs232Txpin5 equ rc.1 ;UART5 transmit output
rs232Rxpin6 equ rc.2 ;UART6 receive input
rs232Txpin6 equ rc.3 ;UART6 transmit output
rs232Rxpin7 equ rc.4 ;UART7 receive input
rs232Txpin7 equ rc.5 ;UART7 transmit output
rs232Rxpin8 equ rc.6 ;UART8 receive input
rs232Txpin8 equ rc.7 ;UART8 transmit output
;*****************************************************************************************
;---------------------------------- Program constants ------------------------------------
;*****************************************************************************************
_enter equ 13 ; ASCII value for carridge return
_line_feed equ 10 ; ASCII value for a line feed
;*****************************************************************************************
; UART Constants values
;*****************************************************************************************
intPeriod = 217 ;# of cycles between 2 continuous samples
UARTfs = 230400 ;UART's basic frequency
Num = 4 ;This means that each individual thread
;containing a UART VP will execute itself
;every fourth interupt.
;*****************************************************************************************
;--------------------------------------- UART1 -------------------------------------------
;*****************************************************************************************
IFDEF uart1baud1200
UARTBaud1 = 1200
ENDIF
IFDEF uart1baud2400
UARTBaud1 = 2400
ENDIF
IFDEF uart1baud4800
UARTBaud1 = 4800
ENDIF
IFDEF uart1baud9600
UARTBaud1 = 9600
ENDIF
IFDEF uart1baud1920
UARTBaud1 = 19200
ENDIF
IFDEF uart1baud5760
UARTBaud1 = 57600
ENDIF
UARTDivide1 = (UARTfs/(UARTBaud1*Num))
UARTStDelay1 = UARTDivide1 +(UARTDivide1/2)+1
;*****************************************************************************************
;--------------------------------------- UART2 -------------------------------------------
;*****************************************************************************************
IFDEF uart2baud1200
UARTBaud2 = 1200
ENDIF
IFDEF uart2baud2400
UARTBaud2 = 2400
ENDIF
IFDEF uart2baud4800
UARTBaud2 = 4800
ENDIF
IFDEF uart2baud9600
UARTBaud2 = 9600
ENDIF
IFDEF uart2baud1920
UARTBaud2 = 19200
ENDIF
IFDEF uart2baud5760
UARTBaud2 = 57600
ENDIF
UARTDivide2 = (UARTfs/(UARTBaud2*Num))
UARTStDelay2 = UARTDivide2 +(UARTDivide2/2)+1
;*****************************************************************************************
;--------------------------------------- UART3 -------------------------------------------
;*****************************************************************************************
IFDEF uart3baud1200
UARTBaud3 = 1200
ENDIF
IFDEF uart3baud2400
UARTBaud3 = 2400
ENDIF
IFDEF uart3baud4800
UARTBaud3 = 4800
ENDIF
IFDEF uart3baud9600
UARTBaud3 = 9600
ENDIF
IFDEF uart3baud1920
UARTBaud3 = 19200
ENDIF
IFDEF uart3baud5760
UARTBaud3 = 57600
ENDIF
UARTDivide3 = (UARTfs/(UARTBaud3*Num))
UARTStDelay3 = UARTDivide3 +(UARTDivide3/2)+1
;*****************************************************************************************
;--------------------------------------- UART4 -------------------------------------------
;*****************************************************************************************
IFDEF uart4baud1200
UARTBaud4 = 1200
ENDIF
IFDEF uart4baud2400
UARTBaud4 = 2400
ENDIF
IFDEF uart4baud4800
UARTBaud4 = 4800
ENDIF
IFDEF uart4baud9600
UARTBaud4 = 9600
ENDIF
IFDEF uart4baud1920
UARTBaud4 = 19200
ENDIF
IFDEF uart4baud5760
UARTBaud4 = 57600
ENDIF
UARTDivide4 = (UARTfs/(UARTBaud4*Num))
UARTStDelay4 = UARTDivide4 +(UARTDivide4/2)+1
;*****************************************************************************************
;--------------------------------------- UART5 -------------------------------------------
;*****************************************************************************************
IFDEF uart5baud1200
UARTBaud5 = 1200
ENDIF
IFDEF uart5baud2400
UARTBaud5 = 2400
ENDIF
IFDEF uart5baud4800
UARTBaud5 = 4800
ENDIF
IFDEF uart5baud9600
UARTBaud5 = 9600
ENDIF
IFDEF uart5baud1920
UARTBaud5 = 19200
ENDIF
IFDEF uart5baud5760
UARTBaud5 = 57600
ENDIF
UARTDivide5 = (UARTfs/(UARTBaud5*Num))
UARTStDelay5 = UARTDivide5 +(UARTDivide5/2)+1
;*****************************************************************************************
;--------------------------------------- UART6 -------------------------------------------
;*****************************************************************************************
IFDEF uart6baud1200
UARTBaud6 = 1200
ENDIF
IFDEF uart6baud2400
UARTBaud6 = 2400
ENDIF
IFDEF uart6baud4800
UARTBaud6 = 4800
ENDIF
IFDEF uart6baud9600
UARTBaud6 = 9600
ENDIF
IFDEF uart6baud1920
UARTBaud6 = 19200
ENDIF
IFDEF uart6baud5760
UARTBaud6 = 57600
ENDIF
UARTDivide6 = (UARTfs/(UARTBaud6*Num))
UARTStDelay6 = UARTDivide6 +(UARTDivide6/2)+1
;*****************************************************************************************
;--------------------------------------- UART7 -------------------------------------------
;*****************************************************************************************
IFDEF uart7baud1200
UARTBaud7 = 1200
ENDIF
IFDEF uart7baud2400
UARTBaud7 = 2400
ENDIF
IFDEF uart7baud4800
UARTBaud7 = 4800
ENDIF
IFDEF uart7baud9600
UARTBaud7 = 9600
ENDIF
IFDEF uart7baud1920
UARTBaud7 = 19200
ENDIF
IFDEF uart7baud5760
UARTBaud7 = 57600
ENDIF
UARTDivide7 = (UARTfs/(UARTBaud7*Num))
UARTStDelay7 = UARTDivide7 +(UARTDivide7/2)+1
;*****************************************************************************************
;--------------------------------------- UART8 -------------------------------------------
;*****************************************************************************************
IFDEF uart8baud1200
UARTBaud8 = 1200
ENDIF
IFDEF uart8baud2400
UARTBaud8 = 2400
ENDIF
IFDEF uart8baud4800
UARTBaud8 = 4800
ENDIF
IFDEF uart8baud9600
UARTBaud8 = 9600
ENDIF
IFDEF uart8baud1920
UARTBaud8 = 19200
ENDIF
IFDEF uart8baud5760
UARTBaud8 = 57600
ENDIF
UARTDivide8 = (UARTfs/(UARTBaud8*Num))
UARTStDelay8 = UARTDivide8+(UARTDivide8/2)+1
;*****************************************************************************************
IFDEF SX48_52
;*****************************************************************************************
; SX48BD/52BD Mode addresses
; *On SX48BD/52BD, most registers addressed via mode are read and write, with the
; exception of CMP and WKPND which do an exchange with W.
;*****************************************************************************************
;------------------------------- Timer (read) addresses ----------------------------------
TCPL_R equ $00 ;Read Timer Capture register low byte
TCPH_R equ $01 ;Read Timer Capture register high byte
TR2CML_R equ $02 ;Read Timer R2 low byte
TR2CMH_R equ $03 ;Read Timer R2 high byte
TR1CML_R equ $04 ;Read Timer R1 low byte
TR1CMH_R equ $05 ;Read Timer R1 high byte
TCNTB_R equ $06 ;Read Timer control register B
TCNTA_R equ $07 ;Read Timer control register A
;---------------------------------- Exchange addresses -----------------------------------
CMP equ $08 ;Exchange Comparator enable/status register with W
WKPND equ $09 ;Exchange MIWU/RB Interrupts pending with W
;--------------------------------- port setup (read) addresses----------------------------
WKED_R equ $0A ;Read MIWU/RB Interrupt edge setup, 1 = falling, 0 = rising
WKEN_R equ $0B ;Read MIWU/RB Interrupt edge setup, 0 = enabled, 1 = disabled
ST_R equ $0C ;Read Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
LVL_R equ $0D ;Read Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
PLP_R equ $0E ;Read Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
DDIR_R equ $0F ;Read Port Direction
;--------------------------------- Timer (write) addresses -------------------------------
CLR_TMR equ $10 ;Resets 16-bit Timer
TR2CML_W equ $12 ;Write Timer R2 low byte
TR2CMH_W equ $13 ;Write Timer R2 high byte
TR1CML_W equ $14 ;Write Timer R1 low byte
TR1CMH_W equ $15 ;Write Timer R1 high byte
TCNTB_W equ $16 ;Write Timer control register B
TCNTA_W equ $17 ;Write Timer control register A
;------------------------------- Port setup (write) addresses ----------------------------
WKED_W equ $1A ;Write MIWU/RB Interrupt edge setup, 1 = falling, 0 = rising
WKEN_W equ $1B ;Write MIWU/RB Interrupt edge setup, 0 = enabled, 1 = disabled
ST_W equ $1C ;Write Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
LVL_W equ $1D ;Write Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
PLP_W equ $1E ;Write Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
DDIR_W equ $1F ;Write Port Direction
ELSE
;*****************************************************************************************
; SX18AC/20AC/28AC Mode addresses
; *On SX18/20/28, all registers addressed via mode are write only, with the exception of
; CMP and WKPND which do an exchange with W.
;*****************************************************************************************
;------------------------------------ Exchange addresses ---------------------------------
CMP equ $08 ;Exchange Comparator enable/status register with W
WKPND equ $09 ;Exchange MIWU/RB Interrupts pending with W
;--------------------------------- Port setup (read) addresses ---------------------------
WKED_W equ $0A ;Write MIWU/RB Interrupt edge setup, 1 = falling, 0 = rising
WKEN_W equ $0B ;Write MIWU/RB Interrupt edge setup, 0 = enabled, 1 = disabled
ST_W equ $0C ;Write Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
LVL_W equ $0D ;Write Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
PLP_W equ $0E ;Write Port Schmitt Trigger setup, 0 = enabled, 1 = disabled
DDIR_W equ $0F ;Write Port Direction
ENDIF
;*****************************************************************************************
;---------------------------------- Program memory ORG defines ---------------------------
;*****************************************************************************************
INTERRUPT_ORG equ $0 ; Interrupt must always start at location zero
RESETENTRY_ORG equ $1FB ; The program will jump here on reset
SUBROUTINES_ORG equ $200 ; The subroutines are in this location
STRINGS_ORG equ $300 ; The strings are in the location $300
PAGE3_ORG equ $400 ; Page 3 is empty
MAINPROGRAM_ORG equ $600 ; The main program is in the lastpage of program memory
;*****************************************************************************************
org INTERRUPT_ORG ; First location in program memory.
;*****************************************************************************************
;*****************************************************************************************
;--------------------------------- Interrupt Service Routine -----------------------------
; Note 1: The interrupt code must always originate at address $0.
; Interrupt Frequency = (Cycle Frequency / -(retiw value))
; For example: With a retiw value of -217 and an oscillator frequency
; of 50MHz, this code runs every 4.32us.
; Note 2: Mode Register 'M' is not saved in SX 28 but saved in SX 52 when an Interrupt
; occurs. If the code is to run on a SX 28 and 'M' register is used in the ISR,
; then the 'M' register has to be saved at the Start of ISR and restored at the
; End of ISR.
;*****************************************************************************************
org $0
interrupt ;3
IFDEF SX_28AC
mov w,m ; Save the m register.
mov isrTemp0,w ;
ENDIF
;*****************************************************************************************
;-------------------------------------- VP:VP Multitasker --------------------------------
; Virtual Peripheral Multitasker : up to 24 individual threads, each running at the
; (interrupt rate/4). Change the below:
;Input variable(s): isrmultiplex: variable used to choose threads
;Output variable(s): None,executes the next thread
;Variable(s) affected: isrmultiplex
;Flag(s) affected: None
;Program Cycles: 9 cycles (turbo mode)
;*****************************************************************************************
_bank Multiplexbank ;
inc isrMultiplex ; toggle interrupt rate
mov w,isrMultiplex ;
;*****************************************************************************************
; The code between the tableStart and tableEnd statements MUST be completely within the first
; half of a page. The routines it is jumping to must be in the same page as this table.
;*****************************************************************************************
tableStart ; Start all tables with this macro
;
jmp pc+w ;
jmp isrThread1 ;
jmp isrThread2 ;
jmp isrThread3 ;
jmp isrThread4 ;
tableEnd ; End all tables with this macro.
;*****************************************************************************************
;VP: VP Multitasker
; ISR TASKS
;*****************************************************************************************
isrThread1 ; Serviced at ISR rate/4
;--------------------------------------- VP: RS232 Transmit ------------------------------
rs232Transmit1
_bank rs232TxBank1234 ; switch to serial register bank
sb rs232Tx1Flag ; Is data there for UART1,
jmp :rs232TxOut1 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide1 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut1 ; i.e don't enter the Tx rotine
mov w,#UARTDivide1 ; If Divide val becomes 0 & enters the Tx routine, then again load the
mov rs232TxDivide1,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount1 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut1 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh1 ; right shift Tx data
rr rs232TxLow1 ; right shift rs232TxLow which contains start bit
dec rs232TxCount1 ; decrement bit counter
snb rs232TxLow1.6 ; if the bit in viewing window is hi
clrb rs232TxPin1 ; Then make transmit pin lo
sb rs232TxLow1.6 ; if the bit in viewing window is lo
setb rs232TxPin1 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount1 ; test count
snz ; if zero
clrb rs232Tx1Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut1
;*****************************************************************************************
rs232Receive1
sb rs232RxPin1 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin1 ; other wise
stc ; set the carrry
_bank rs232RxBank1234
test rs232RxCount1 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount1,w ; it is, so load bit count
mov w,#UARTStDelay1 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide1,w ; load fresh Divide value
:rxbit decsz rs232RxDivide1 ; If Divide value is not zero after dec
jmp :rs232RxOut1 ; then don't go into Rx routine
mov w,#UARTDivide1 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide1,w ;
dec rs232RxCount1 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte1 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag1 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut1
;*****************************************************************************************
;------------------------------------------ UART2 ----------------------------------------
;*****************************************************************************************
rs232Transmit2
_bank rs232TxBank1234 ; switch to serial register bank
sb rs232Tx2Flag ; Is data there for UART2,
jmp :rs232TxOut2 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide2 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut2 ; i.e don't enter the Tx rotine
mov w,#UARTDivide2 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide2,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount2 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut2 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh2 ; right shift Tx data
rr rs232TxLow2 ; right shift rs232TxLow which contains start bit
dec rs232TxCount2 ; decrement bit counter
snb rs232TxLow2.6 ; if the bit in viewing window is hi
clrb rs232TxPin2 ; Then make transmit pin lo
sb rs232TxLow2.6 ; if the bit in viewing window is lo
setb rs232TxPin2 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount2 ; test count
snz ; if zero
clrb rs232Tx2Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut2
;*****************************************************************************************
rs232Receive2
sb rs232RxPin2 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin2 ; other wise
stc ; set the carrry
_bank rs232RxBank1234
test rs232RxCount2 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount2,w ; it is, so load bit count
mov w,#UARTStDelay2 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide2,w ; load fresh Divide value
:rxbit decsz rs232RxDivide2 ; If Divide value is not zero after dec
jmp :rs232RxOut2 ; then don't go into Rx routine
mov w,#UARTDivide2 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide2,w ;
dec rs232RxCount2 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte2 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag2 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut2
jmp isrOut ; End of isrThread1
;*****************************************************************************************
isrThread2 ;UART3&4
;*****************************************************************************************
rs232Transmit3
_bank rs232TxBank1234 ; switch to serial register bank
sb rs232Tx3Flag ; Is data there for UART3,
jmp :rs232TxOut3 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide3 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut3 ; i.e don't enter the Tx rotine
mov w,#UARTDivide3 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide3,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount3 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut3 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh3 ; right shift Tx data
rr rs232TxLow3 ; right shift rs232TxLow which contains start bit
dec rs232TxCount3 ; decrement bit counter
snb rs232TxLow3.6 ; if the bit in viewing window is hi
clrb rs232TxPin3 ; Then make transmit pin lo
sb rs232TxLow3.6 ; if the bit in viewing window is lo
setb rs232TxPin3 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount3 ; test count
snz ; if zero
clrb rs232Tx3Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut3
;*****************************************************************************************
rs232Receive3
sb rs232RxPin3 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin3 ; other wise
stc ; set the carrry
_bank rs232RxBank1234
test rs232RxCount3 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount3,w ; it is, so load bit count
mov w,#UARTStDelay3 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide3,w ; load fresh Divide value
:rxbit decsz rs232RxDivide3 ; If Divide value is not zero after dec
jmp :rs232RxOut3 ; then don't go into Rx routine
mov w,#UARTDivide3 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide3,w ;
dec rs232RxCount3 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte3 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag3 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut3
;*****************************************************************************************
;---------------------------------------- UART4 ------------------------------------------
;*****************************************************************************************
rs232Transmit4
_bank rs232TxBank1234 ; switch to serial register bank
sb rs232Tx4Flag ; Is data there for UART4,
jmp :rs232TxOut4 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide4 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut4 ; i.e don't enter the Tx rotine
mov w,#UARTDivide4 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide4,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount4 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut4 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh4 ; right shift Tx data
rr rs232TxLow4 ; right shift rs232TxLow which contains start bit
dec rs232TxCount4 ; decrement bit counter
snb rs232TxLow4.6 ; if the bit in viewing window is hi
clrb rs232TxPin4 ; Then make transmit pin lo
sb rs232TxLow4.6 ; if the bit in viewing window is lo
setb rs232TxPin4 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount4 ; test count
snz ; if zero
clrb rs232Tx4Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut4
;*****************************************************************************************
rs232Receive4
sb rs232RxPin4 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin4 ; other wise
stc ; set the carrry
_bank rs232RxBank1234
test rs232RxCount4 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount4,w ; it is, so load bit count
mov w,#UARTStDelay4 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide4,w ; load fresh Divide value
:rxbit decsz rs232RxDivide4 ; If Divide value is not zero after dec
jmp :rs232RxOut4 ; then don't go into Rx routine
mov w,#UARTDivide4 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide4,w ;
dec rs232RxCount4 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte4 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag4 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut4 ;
jmp isrOut ; End of isrThread2
;*****************************************************************************************
isrThread3 ;UART5&6
;*****************************************************************************************
rs232Transmit5
_bank rs232TxBank5678 ; switch to serial register bank
sb rs232Tx5Flag ; Is data there for UART5,
jmp :rs232TxOut5 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide5 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut5 ; i.e don't enter the Tx rotine
mov w,#UARTDivide5 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide5,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount5 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut5 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh5 ; right shift Tx data
rr rs232TxLow5 ; right shift rs232TxLow which contains start bit
dec rs232TxCount5 ; decrement bit counter
snb rs232TxLow5.6 ; if the bit in viewing window is hi
clrb rs232TxPin5 ; Then make transmit pin lo
sb rs232TxLow5.6 ; if the bit in viewing window is lo
setb rs232TxPin5 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount5 ; test count
snz ; if zero
clrb rs232Tx5Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut5
;*****************************************************************************************
rs232Receive5
sb rs232RxPin5 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin5 ; other wise
stc ; set the carrry
_bank rs232RxBank5678
test rs232RxCount5 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount5,w ; it is, so load bit count
mov w,#UARTStDelay5 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide5,w ; load fresh Divide value
:rxbit decsz rs232RxDivide5 ; If Divide value is not zero after dec
jmp :rs232RxOut5 ; then don't go into Rx routine
mov w,#UARTDivide5 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide5,w ;
dec rs232RxCount5 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte5 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag5 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut5
;*****************************************************************************************
;---------------------------------------- UART6 ------------------------------------------
;*****************************************************************************************
rs232Transmit6
_bank rs232TxBank5678 ; switch to serial register bank
sb rs232Tx6Flag ; Is data there for UART6,
jmp :rs232TxOut6 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide6 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut6 ; i.e don't enter the Tx rotine
mov w,#UARTDivide6 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide6,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount6 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut6 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh6 ; right shift Tx data
rr rs232TxLow6 ; right shift rs232TxLow which contains start bit
dec rs232TxCount6 ; decrement bit counter
snb rs232TxLow6.6 ; if the bit in viewing window is hi
clrb rs232TxPin6 ; Then make transmit pin lo
sb rs232TxLow6.6 ; if the bit in viewing window is lo
setb rs232TxPin6 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount6 ; test count
snz ; if zero
clrb rs232Tx6Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut6
;*****************************************************************************************
rs232Receive6
sb rs232RxPin6 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin6 ; other wise
stc ; set the carrry
_bank rs232RxBank5678
test rs232RxCount6 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount6,w ; it is, so load bit count
mov w,#UARTStDelay6 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide6,w ; load fresh Divide value
:rxbit decsz rs232RxDivide6 ; If Divide value is not zero after dec
jmp :rs232RxOut6 ; then don't go into Rx routine
mov w,#UARTDivide6 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide6,w ;
dec rs232RxCount6 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte6 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag6 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut6 ;
jmp isrOut ; End of isrThread3
;*****************************************************************************************
isrThread4 ;UART7&8
;*****************************************************************************************
rs232Transmit7
_bank rs232TxBank5678 ; switch to serial register bank
sb rs232Tx7Flag ; Is data there for UART7,
jmp :rs232TxOut7 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide7 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut7 ; i.e don't enter the Tx rotine
mov w,#UARTDivide7 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide7,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount7 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut7 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh7 ; right shift Tx data
rr rs232TxLow7 ; right shift rs232TxLow which contains start bit
dec rs232TxCount7 ; decrement bit counter
snb rs232TxLow7.6 ; if the bit in viewing window is hi
clrb rs232TxPin7 ; Then make transmit pin lo
sb rs232TxLow7.6 ; if the bit in viewing window is lo
setb rs232TxPin7 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount7 ; test count
snz ; if zero
clrb rs232Tx7Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut7
;*****************************************************************************************
rs232Receive7
sb rs232RxPin7 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin7 ; other wise
stc ; set the carrry
_bank rs232RxBank5678
test rs232RxCount7 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount7,w ; it is, so load bit count
mov w,#UARTStDelay7 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide7,w ; load fresh Divide value
:rxbit decsz rs232RxDivide7 ; If Divide value is not zero after dec
jmp :rs232RxOut7 ; then don't go into Rx routine
mov w,#UARTDivide7 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide7,w ;
dec rs232RxCount7 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte7 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag7 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut7
;*****************************************************************************************
;---------------------------------------- UART8 ------------------------------------------
;*****************************************************************************************
rs232Transmit8
_bank rs232TxBank5678 ; switch to serial register bank
sb rs232Tx8Flag ; Is data there for UART8,
jmp :rs232TxOut8 ; then execute the Tx routine otherwise don't.
decsz rs232TxDivide8 ; enter Tx routine until Divide val becomes zero
jmp :rs232TxOut8 ; i.e don't enter the Tx rotine
mov w,#UARTDivide8 ; If Divide val becomes zero & enters the Tx routine then again load the
mov rs232TxDivide8,w ; Divide val for not to enter the Tx routine 'Divide' times for next bit
test rs232TxCount8 ; If count becomes Zero then also don't enter
snz ;
jmp :rs232TxOut8 ;
; after all barriers then only it will come here
:txbit clc ; i.e Txflag = hi, Divide=0, count != 0
rr rs232TxHigh8 ; right shift Tx data
rr rs232TxLow8 ; right shift rs232TxLow which contains start bit
dec rs232TxCount8 ; decrement bit counter
snb rs232TxLow8.6 ; if the bit in viewing window is hi
clrb rs232TxPin8 ; Then make transmit pin lo
sb rs232TxLow8.6 ; if the bit in viewing window is lo
setb rs232TxPin8 ; Then make transmit pin hi
IFNDEF stringTransfer ; If not stringTransfer
test rs232TxCount8 ; test count
snz ; if zero
clrb rs232Tx8Flag ; then clear the Tx flag & come out
ENDIF
:rs232TxOut8
;*****************************************************************************************
rs232Receive8
sb rs232RxPin8 ; get current rx bit
clc ; if bit is zero clear the carry
snb rs232RxPin8 ; other wise
stc ; set the carrry
_bank rs232RxBank5678
test rs232RxCount8 ; test the Rx count
sz ; If zero then only load the Rxcount
jmp :rxbit ; if so, jump ahead
mov w,#9 ; in case start, ready 9 bits
sc ; if not start bit don't load the count
mov rs232RxCount8,w ; it is, so load bit count
mov w,#UARTStDelay8 ; ready 1.5 bit periods (50MHz)
mov rs232RxDivide8,w ; load fresh Divide value
:rxbit decsz rs232RxDivide8 ; If Divide value is not zero after dec
jmp :rs232RxOut8 ; then don't go into Rx routine
mov w,#UARTDivide8 ; If yes,load fresh Divide val for next bit
mov rs232RxDivide8,w ;
dec rs232RxCount8 ; dec the count
sz ; check for Rxcount value
rr rs232RxByte8 ; if zero rotate the buf to save the received bits
snz ; check for Rxcount value
setb rs232RxFlag8 ; if zero set the Rx flag to indicate the
; complete reception of the byte
:rs232RxOut8 ; cycles until mainline program resumes execution
_bank Multiplexbank
mov isrMultiplex,#255 ; reload isrMultiplex so isrThread1 will be run on the
; next interrupt.
jmp isrOut ; cycles until mainline program resumes execution
; This thread must reload the isrMultiplex register
; since it is the last one to run in a rotation.
; End of isrThread4
;-----------------------------------------------------------------------------------------
isrOut
;*****************************************************************************************
; Set Interrupt Rate
;*****************************************************************************************
isr_end
IFDEF SX_28AC
mov w,isrTemp0 ; Restore the mode register value.
mov m,w
ENDIF
mov w,#-intperiod ; refresh RTCC on return
; (RTCC = 217-no of instructions executed in the ISR)
retiw ; return from the interrupt
;*****************************************************************************************
; End of the Interrupt Service Routine
;*****************************************************************************************
;*****************************************************************************************
; RESET VECTOR
;*****************************************************************************************
;*****************************************************************************************
;---------------------------------------- Reset Entry ------------------------------------
;*****************************************************************************************
org RESETENTRY_ORG
resetEntry ; Program starts here on power-up
page _resetEntry
jmp _resetEntry
;*****************************************************************************************
;--------------------------------------- UART Subroutines --------------------------------
;*****************************************************************************************
org SUBROUTINES_ORG
;*****************************************************************************************
; Function : getbyte
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte1, rs232byte2, rs232byte3, rs232byte4,
; rs232byte5, rs232byte6, rs232byte7, rs232byte8
; Get byte via serial port and echo it back to the serial port for all the 8 UART's.
; If there isn't any byte on any of the UART's, the routine will be blocked until
; a byte is received. This is true for all the UART's.
; Instead use "getbyte" routines of the specific UART.
;*****************************************************************************************
getbyte
call getbyte1
call getbyte2
call getbyte3
call getbyte4
call getbyte5
call getbyte6
call getbyte7
call getbyte8
retp
;*****************************************************************************************
; Function : getbyte1
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte1
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte1
_bank rs232RxBank1234
sb rs232RxFlag1
jmp getbyte1
mov rs232Byte1,rs232RxByte1 ; store byte (copy using W)
clrb rs232RxFlag1
retp
;*****************************************************************************************
; Function : getbyte2
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte2
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte2
_bank rs232RxBank1234
sb rs232RxFlag2 ;if UART2 is set
jmp getbyte2
mov rs232Byte2,rs232RxByte2
clrb rs232RxFlag2
retp
;*****************************************************************************************
; Function : getbyte3
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte3
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte3
_bank rs232RxBank1234
sb rs232RxFlag3 ;if UART3 is set
jmp getbyte3
mov rs232Byte3,rs232RxByte3
clrb rs232RxFlag3
retp
;*****************************************************************************************
; Function : getbyte4
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte4
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte4
_bank rs232RxBank1234
sb rs232RxFlag4 ;if UART4 is set
jmp getbyte4
mov rs232Byte4,rs232RxByte4
clrb rs232RxFlag4
retp
;*****************************************************************************************
; Function : getbyte5
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte5
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte5
_bank rs232RxBank5678
sb rs232RxFlag5 ;if UART5 is set
jmp getbyte5
mov rs232Byte5,rs232RxByte5
clrb rs232RxFlag5
retp
;*****************************************************************************************
; Function : getbyte6
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte6
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte6
_bank rs232RxBank5678
sb rs232RxFlag6 ;if UART6 is set
jmp getbyte6
mov rs232Byte6,rs232RxByte6
clrb rs232RxFlag6
retp
;*****************************************************************************************
; Function : getbyte7
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte7
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte7
_bank rs232RxBank5678
sb rs232RxFlag7 ;if UART7 is set
jmp getbyte7
mov rs232Byte7,rs232RxByte7
clrb rs232RxFlag7
retp
;*****************************************************************************************
; Function : getbyte8
; INPUTS : -NONE
; OUTPUTS : -received byte in rs232byte8
; Get byte via serial port and echo it back to the serial port
;*****************************************************************************************
getbyte8
_bank rs232RxBank5678 ;if UART8 is set
sb rs232RxFlag8
jmp getbyte8
mov rs232Byte8,rs232RxByte8
clrb rs232RxFlag8
retp
;*****************************************************************************************
; Function :sendbyte
; INPUTS :w The byte to be sent via RS-232
; : rs232Tx1Flag || rs232Tx2Flag || rs232Tx3Flag || rs232Tx4Flag ||
; rs232Tx5Flag || rs232Tx6Flag || rs232Tx7Flag || rs232Tx8Flag
; OUTPUTS :Outputs The byte via RS-232
;
; Send byte via serial port. The byte that has to be sent has to be in 'w' register
; and the UART Tx flag for any of the 8 UART's has to be set. If the same data has
; to be sent on all the UART's, then the flags of all the UART's has to be set.
; The sendbyte routine returns to main routine only after the byte has been sent.
;*****************************************************************************************
sendbyte
mov localTemp0,w
sb rs232Tx1Flag ; If uart1flag = 0, then :wait2
jmp :u2 ; if not uart1, check for uart2
_bank rs232TxBank1234
mov w,rs232TxHigh1
not w
mov rs232TxHigh1,w
setb rs232TxLow1.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount1,w
:u2 sb rs232Tx2Flag
jmp :u3 ; if not uart2, check for uart3
_bank rs232TxBank1234
mov w,rs232TxHigh2
not w
mov rs232TxHigh2,w
setb rs232TxLow2.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount2,w
:u3 sb rs232Tx3Flag
jmp :u4 ; if not uart3, check for uart4
_bank rs232TxBank1234
mov w,rs232TxHigh3
not w
mov rs232TxHigh3,w
setb rs232TxLow3.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount3,w
:u4 sb rs232Tx4Flag
jmp :u5 ; if not uart4, check for uart5
_bank rs232TxBank1234
mov w,rs232TxHigh4
not w
mov rs232TxHigh4,w
setb rs232TxLow4.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount4,w
:u5 sb rs232Tx5Flag
jmp :u6 ; if not uart5, check for uart6
_bank rs232TxBank5678
mov w,rs232TxHigh5
not w
mov rs232TxHigh5,w
setb rs232TxLow5.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount5,w
:u6 sb rs232Tx6Flag
jmp :u7 ; if not uart6, check for uart7
_bank rs232TxBank5678
mov w,rs232TxHigh6
not w
mov rs232TxHigh6,w
setb rs232TxLow6.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount6,w
:u7 sb rs232Tx7Flag
jmp :u8 ; if not uart7, check for uart8
_bank rs232TxBank5678
mov w,rs232TxHigh7
not w
mov rs232TxHigh7,w
setb rs232TxLow7.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount7,w
:u8 sb rs232Tx8Flag
jmp :wait1 ; if not uart8
_bank rs232TxBank5678
mov w,rs232TxHigh8
not w
mov rs232TxHigh8,w
setb rs232TxLow8.7 ; set up start bit
mov w,#10 ; 1 start + 8 data + 1 stop bit
mov rs232TxCount8,w
:wait1 _bank rs232TxBank1234
test rs232TxCount1 ; wait until data on UART1 is Tx'ed
sz
jmp :wait1
:wait2 _bank rs232TxBank1234
test rs232TxCount2 ; wait until data on UART2 is Tx'ed
sz
jmp :wait2
:wait3 _bank rs232TxBank1234
test rs232TxCount3 ; wait until data on UART3 is Tx'ed
sz
jmp :wait3
:wait4 _bank rs232TxBank1234
test rs232TxCount4 ; wait until data on UART4 is Tx'ed
sz
jmp :wait4
:wait5 _bank rs232TxBank5678
test rs232TxCount5 ; wait until data on UART5 is Tx'ed
sz
jmp :wait5
:wait6 _bank rs232TxBank5678
test rs232TxCount6 ; wait until data on UART6 is Tx'ed
sz
jmp :wait6
:wait7 _bank rs232TxBank5678
test rs232TxCount7 ; wait until data on UART7 is Tx'ed
sz
jmp :wait7
:wait8 _bank rs232TxBank5678
test rs232TxCount8 ; wait until data on UART8 is Tx'ed
sz
jmp :wait8
retp
;*****************************************************************************************
; Function : sendString
; INPUTS :w The address of a null-terminated string in program memory
; OUTPUTS :outputs the string via RS-232
; Send string pointed to by address in W register
;*****************************************************************************************
sendString
mov localTemp1,w ; store string address
:loop
mov w,#STRINGS_ORG>>8 ; with indirect addressing
mov m,w
mov w,localTemp1
iread ; using the mode register
test w ; are we at the last char?
snz ; if not=0, skip ahead
jmp :out
_bank rs232TxBank1234 ; Check for which UART the string has to be sent
snb rs232Tx1Flag
mov rs232TxHigh1,w
_bank rs232TxBank1234
snb rs232Tx2Flag
mov rs232TxHigh2,w
_bank rs232TxBank1234
snb rs232Tx3Flag
mov rs232TxHigh3,w
_bank rs232TxBank1234
snb rs232Tx4Flag
mov rs232TxHigh4,w
_bank rs232TxBank5678
snb rs232Tx5Flag
mov rs232TxHigh5,w
_bank rs232TxBank5678
snb rs232Tx6Flag
mov rs232TxHigh6,w
_bank rs232TxBank5678
snb rs232Tx7Flag
mov rs232TxHigh7,w
_bank rs232TxBank5678
snb rs232Tx8Flag
mov rs232TxHigh8,w
call sendByte ; not 0, so send character
inc localTemp1 ; point to next character
jmp :loop ; loop until done
:out mov w,#$1F ; reset the mode register
mov m,w
retp
;*****************************************************************************************
org STRINGS_ORG ; This label defines where strings are kept in program space.
;*****************************************************************************************
;*****************************************************************************************
;------------------------------------------- String Data ---------------------------------
;*****************************************************************************************
;VP: RS232 Transmit
_hello dw 13,10,'Yup, The UART works!!!',0
_hitSpace dw 13,10,'Hit Space...',0
;*****************************************************************************************
org PAGE3_ORG
;*****************************************************************************************
jmp $
;*****************************************************************************************
;-------------------------------------- Main Program -------------------------------------
; Program execution begins here on power-up or after a reset
;*****************************************************************************************
;*****************************************************************************************
org MAINPROGRAM_ORG
;*****************************************************************************************
_resetEntry
;*****************************************************************************************
;---------------------------- Initialise all port configuration --------------------------
;*****************************************************************************************
_mode ST_W ;point MODE to write ST register
mov w,#RB_ST ;Setup RB Schmitt Trigger, 0 = enabled, 1 = disabled
mov !rb,w
mov w,#RC_ST ;Setup RC Schmitt Trigger, 0 = enabled, 1 = disabled
mov !rc,w
IFDEF SX48_52
mov w,#RD_ST ;Setup RD Schmitt Trigger, 0 = enabled, 1 = disabled
mov !rd,w
mov w,#RE_ST ;Setup RE Schmitt Trigger, 0 = enabled, 1 = disabled
mov !re,w
ENDIF
_mode LVL_W ;point MODE to write LVL register
mov w,#RA_LVL ;Setup RA CMOS or TTL levels, 1 = TTL, 0 = CMOS
mov !ra,w
mov w,#RB_LVL ;Setup RB CMOS or TTL levels, 1 = TTL, 0 = CMOS
mov !rb,w
mov w,#RC_LVL ;Setup RC CMOS or TTL levels, 1 = TTL, 0 = CMOS
mov !rc,w
IFDEF SX48_52
mov w,#RD_LVL ;Setup RD CMOS or TTL levels, 1 = TTL, 0 = CMOS
mov !rd,w
mov w,#RE_LVL ;Setup RE CMOS or TTL levels, 1 = TTL, 0 = CMOS
mov !re,w
ENDIF
_mode PLP_W ;point MODE to write PLP register
mov w,#RA_PLP ;Setup RA Weak Pull-up, 0 = enabled, 1 = disabled
mov !ra,w
mov w,#RB_PLP ;Setup RB Weak Pull-up, 0 = enabled, 1 = disabled
mov !rb,w
mov w,#RC_PLP ;Setup RC Weak Pull-up, 0 = enabled, 1 = disabled
mov !rc,w
IFDEF SX48_52
mov w,#RD_PLP ;Setup RD Weak Pull-up, 0 = enabled, 1 = disabled
mov !rd,w
mov w,#RE_PLP ;Setup RE Weak Pull-up, 0 = enabled, 1 = disabled
mov !re,w
ENDIF
_mode DDIR_W ;point MODE to write DDIR register
mov w,#RA_DDIR ;Setup RA Direction register, 0 = output, 1 = input
mov !ra,w
mov w,#RB_DDIR ;Setup RB Direction register, 0 = output, 1 = input
mov !rb,w
mov w,#RC_DDIR ;Setup RC Direction register, 0 = output, 1 = input
mov !rc,w
IFDEF SX48_52
mov w,#RD_DDIR ;Setup RD Direction register, 0 = output, 1 = input
mov !rd,w
mov w,#RE_DDIR ;Setup RE Direction register, 0 = output, 1 = input
mov !re,w
ENDIF
mov w,#RA_latch ;Initialize RA data latch
mov ra,w
mov w,#RB_latch ;Initialize RB data latch
mov rb,w
mov w,#RC_latch ;Initialize RC data latch
mov rc,w
IFDEF SX48_52
mov w,#RD_latch ;Initialize RD data latch
mov rd,w
mov w,#RE_latch ;Initialize RE data latch
mov re,w
ENDIF
;*****************************************************************************************
;----------------------------- Clear all Data RAM locations ------------------------------
;*****************************************************************************************
IFDEF SX48_52 ;SX48/52 RAM clear routine
mov w,#$0a ;reset all ram starting at $0A
mov fsr,w
:zeroRam clr ind ;clear using indirect addressing
incsz fsr ;repeat until done
jmp :zeroRam
_bank bank0 ;clear bank 0 registers
clr $10
clr $11
clr $12
clr $13
clr $14
clr $15
clr $16
clr $17
clr $18
clr $19
clr $1a
clr $1b
clr $1c
clr $1d
clr $1e
clr $1f
ELSE ;SX18/20/28 RAM clear routine
clr fsr ;reset all ram banks
:zeroRam sb fsr.4 ;are we on low half of bank?
setb fsr.3 ;If so, don't touch regs 0-7
clr ind ;clear using indirect addressing
incsz fsr ;repeat until done
jmp :zeroRam
ENDIF
;*****************************************************************************************
; Initialize program/VP registers
;*****************************************************************************************
_bank rs232TxBank1234 ;select rs232 bank
mov w,#UARTDivide1 ;load Txdivide with UART1 baud rate
mov rs232TXdivide1,w
mov w,#UARTDivide2 ;load Txdivide with UART2 baud rate
mov rs232TXdivide2,w
mov w,#UARTDivide3 ;load Txdivide with UART3 baud rate
mov rs232TXdivide3,w
mov w,#UARTDivide4 ;load Txdivide with UART4 baud rate
mov rs232TXdivide4,w
_bank rs232TxBank5678
mov w,#UARTDivide5 ;load Txdivide with UART5 baud rate
mov rs232TXdivide5,w
mov w,#UARTDivide6 ;load Txdivide with UART6 baud rate
mov rs232TXdivide6,w
mov w,#UARTDivide7 ;load Txdivide with UART7 baud rate
mov rs232TXdivide7,w
mov w,#UARTDivide8 ;load Txdivide with UART8 baud rate
mov rs232TXdivide8,w
;*****************************************************************************************
; Setup and enable RTCC interrupt, WREG register, RTCC/WDT prescaler
;*****************************************************************************************
RTCC_ON = %10000000 ;Enables RTCC at address $01 (RTW hi)
;*WREG at address $01 (RTW lo) by default
RTCC_ID = %01000000 ;Disables RTCC edge interrupt (RTE_IE hi)
;*RTCC edge interrupt (RTE_IE lo) enabled by default
RTCC_INC_EXT = %00100000 ;Sets RTCC increment on RTCC pin transition (RTS hi)
;*RTCC increment on internal instruction (RTS lo) is default
RTCC_FE = %00010000 ;Sets RTCC to increment on falling edge (RTE_ES hi)
;*RTCC to increment on rising edge (RTE_ES lo) is default
RTCC_PS_ON = %00000000 ;Assigns prescaler to RTCC (PSA lo)
RTCC_PS_OFF = %00001000 ;Assigns prescaler to WDT (PSA hi)
PS_000 = %00000000 ;RTCC = 1:2, WDT = 1:1
PS_001 = %00000001 ;RTCC = 1:4, WDT = 1:2
PS_010 = %00000010 ;RTCC = 1:8, WDT = 1:4
PS_011 = %00000011 ;RTCC = 1:16, WDT = 1:8
PS_100 = %00000100 ;RTCC = 1:32, WDT = 1:16
PS_101 = %00000101 ;RTCC = 1:64, WDT = 1:32
PS_110 = %00000110 ;RTCC = 1:128, WDT = 1:64
PS_111 = %00000111 ;RTCC = 1:256, WDT = 1:128
OPTIONSETUP equ RTCC_PS_OFF|PS_111 ; the default option setup for this program.
mov w,#OPTIONSETUP ; setup option register for RTCC interrupts enabled
mov !option,w ; and prescaler assigned to WDT.
jmp @mainLoop
;*****************************************************************************************
;--------------------------------- MAIN PROGRAM CODE -------------------------------------
;*****************************************************************************************
mainLoop
;*****************************************************************************************
; Example 1
;*****************************************************************************************
IFDEF stringTransfer ; For an example with "send string"
; ........................................................................................
; Uncomment any one of the following depending on which UART you want to Transmit on.
; ........................................................................................
setb rs232Tx1Flag
; setb rs232Tx2Flag
; setb rs232Tx3Flag
; setb rs232Tx4Flag
; setb rs232Tx5Flag
; setb rs232Tx6Flag
; setb rs232Tx7Flag
; setb rs232Tx8Flag
mov w,#_hitSpace ; Send prompt to terminal at UART rate
call @sendString ; String is sent to the UART whose flag
; is SET above.
:loop call @getByte1
cjne rs232RxByte1,#' ',:loop ; Compare if "SPACE BAR" is received
mov w,#_hello ; When space bar hit, send out string.
call @sendString
jmp mainLoop
; End of Example 1
ENDIF
;*****************************************************************************************
;*****************************************************************************************
; Example 2
;*****************************************************************************************
IFDEF byteTransfer ; If "send string" is not required
; ........................................................................................
; Uncomment any one of the following depending on which UART you want to receive on.
; If you want to receive from all the UART's, then uncomment "call @getByte"
; ........................................................................................
call @getByte1 ; Receive a Byte from UART1
; call @getByte2 ; Receive a Byte from UART2
; call @getByte3 ; Receive a Byte from UART3
; call @getByte4 ; Receive a Byte from UART4
; call @getByte5 ; Receive a Byte from UART5
; call @getByte6 ; Receive a Byte from UART6
; call @getByte7 ; Receive a Byte from UART7
; call @getByte8 ; Receive a Byte from UART8
; call @getByte ; If you want to Receive on all the UART's
_bank rs232RxBank1234
mov w,rs232Byte1
_bank rs232TxBank1234
mov rs232TxHigh1,w ; Load from the UART1 Rx buffer to Tx Buffer
_bank rs232RxBank1234
mov w,rs232Byte2
_bank rs232TxBank1234
mov rs232TxHigh2,w ; Load from the UART2 Rx buffer to Tx Buffer
_bank rs232RxBank1234
mov w,rs232Byte3
_bank rs232TxBank1234
mov rs232TxHigh3,w ; Load from the UART3 Rx buffer to Tx Buffer
_bank rs232RxBank1234
mov w,rs232Byte4
_bank rs232TxBank1234
mov rs232TxHigh4,w ; Load from the UART4 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte5
_bank rs232TxBank5678
mov rs232TxHigh5,w ; Load from the UART5 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte6
_bank rs232TxBank5678
mov rs232TxHigh6,w ; Load from the UART6 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte7
_bank rs232TxBank5678
mov rs232TxHigh7,w ; Load from the UART7 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte8
_bank rs232TxBank5678
mov rs232TxHigh8,w ; Load from the UART8 Rx buffer to Tx Buffer
; ........................................................................................
; Uncomment any of the following lines to enable the echoing of data on the
; respective UART (e.g.: uncomment setb re232TX2Flag in order to echo data on UART 2).
; ........................................................................................
setb rs232Tx1Flag ; Enable Tx flag for UART1
; setb rs232Tx2Flag
; setb rs232Tx3Flag
; setb rs232Tx4Flag
; setb rs232Tx5Flag
; setb rs232Tx6Flag
; setb rs232Tx7Flag
; setb rs232Tx8Flag
call @sendbyte ; Send the Received byte back
jmp mainLoop
; End of Example 2
ENDIF
;*****************************************************************************************
;****************************************************************************************
; Example 3: The below code is the same as Example 2
;****************************************************************************************
IFDEF fileTransfer ; For "File Transfer" Example
; ........................................................................................
; Uncomment any one of the following depending on which UART you want to receive on.
; If you want to receive from all the UART's, then uncomment "call @getByte"
; ........................................................................................
call @getByte1 ; Receive a Byte from UART1
; call @getByte2 ; Receive a Byte from UART2
; call @getByte3 ; Receive a Byte from UART3
; call @getByte4 ; Receive a Byte from UART4
; call @getByte5 ; Receive a Byte from UART5
; call @getByte6 ; Receive a Byte from UART6
; call @getByte7 ; Receive a Byte from UART7
; call @getByte8 ; Receive a Byte from UART8
; call @getByte ; If you want to Receive on all the UART's
_bank rs232RxBank1234
mov w,rs232Byte1
_bank rs232TxBank1234
mov rs232TxHigh1,w ; Load from the UART1 Rx buffer to Tx Buffer
_bank rs232RxBank1234
mov w,rs232Byte2
_bank rs232TxBank1234
mov rs232TxHigh2,w ; Load from the UART2 Rx buffer to Tx Buffer
_bank rs232RxBank1234
mov w,rs232Byte3
_bank rs232TxBank1234
mov rs232TxHigh3,w ; Load from the UART3 Rx buffer to Tx Buffer
_bank rs232RxBank1234
mov w,rs232Byte4
_bank rs232TxBank1234
mov rs232TxHigh4,w ; Load from the UART4 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte5
_bank rs232TxBank5678
mov rs232TxHigh5,w ; Load from the UART5 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte6
_bank rs232TxBank5678
mov rs232TxHigh6,w ; Load from the UART6 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte7
_bank rs232TxBank5678
mov rs232TxHigh7,w ; Load from the UART7 Rx buffer to Tx Buffer
_bank rs232RxBank5678
mov w,rs232Byte8
_bank rs232TxBank5678
mov rs232TxHigh8,w ; Load from the UART8 Rx buffer to Tx Buffer
; ........................................................................................
; Uncomment any of the following lines to enable the echoing of a file on the
; respective UART (e.g.: uncomment setb re232TX2Flag in order to echo a file on UART 2).
; ........................................................................................
setb rs232Tx1Flag ; Enable Tx flag for UART1
; setb rs232Tx2Flag
; setb rs232Tx3Flag
; setb rs232Tx4Flag
; setb rs232Tx5Flag
; setb rs232Tx6Flag
; setb rs232Tx7Flag
; setb rs232Tx8Flag
call @sendbyte ; Send the Received byte from file back
jmp mainLoop
; End of Example 3
ENDIF
;*****************************************************************************************
;*****************************************************************************************
END ;End of program code
;*****************************************************************************************
| file: /Techref/scenix/lib/io/osi2/serial/eight_uart.src, 97KB, , updated: 2001/7/24 10:58, local time: 2024/11/16 00:18,
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