CAN接口汇编程序
ORG 0000H
LJMP MAIN
ORG 0003H
LJMP CANINT0
ORG 000BH
LJMP T0-INTERRUPT
ORG 0100H
MAIN：
MOV R0,#07FH
CLR A
MOV @R0,A
DJNZ R0,$_1
MOV @R0,A
MOV SP,#60H
LCALL SJA1000_INIT0
LCALL DISPLAY_INIT
LCALL T0INIT
SETB PX0
SETB IT0
SETB EX0
SETB ET0
SETB TR0
SETB EA
LOOPER:
JNB RCV_GOOD,LOOPER2
CLR RCV_GOOD
LCALL RCVDATA PRG
LOOPER2:
JNB SEC_FLAG,LOOPER3
CLR SEC_FLAG
LCALL SENDDATA_PRG
LOOPER3:
JNB ERR_FLAG,LOOPER4
CLR ERR_FLAG
LCALL ERR_PRG
LOOPER4:
JNB OVER_FLAG,LOOPER5
CLR OVER_FLAG
LCALL DOVER_PRG
LOOPER5:
JNB DS_ENDLFLAG,LOOPER6
CLR DS_END_FLAG
LCALL DSEND_PRG
LOOPER6:
JNB WUL FLAG,LOOPER7
CLR WUL FLAG
LCALL WOKE_PRG
LOOPER7:
AJMP LOOPER
SJA1000_INIT0:
LCALL CAN_CREATE_COMMUNATION
MOV R7,#12
LCALL CAN_SET_BANDRATE
MOV R7,#0A8H
MOV R6,#0ffH
LCALL CAN_SET_OBJECT
MOV R7,#0AAH
MOV R6,#048H
LCALL CAN_SET_OUTCLK
LCALL CAN_QUIT_RETMODEL
MOV DPTR,# REG_CONTROL
MOV A,#01EH
MOV X @DPTR,A
CLR F0
RET
ERR_PRG:
LCALL CAN_ENTER_RETMODEL
LCALL SJA1000_INIT0
MOV ERROR_STATUS,#0FCH
LCALL DISP_ERROR
RET
DSENDLPRG:
LCALL DISP_OK
RET
RCVDATA_PRG:
MOV R0,#RCV_DATA_BUF1
LCALL CAN_DATA_RECEIVE
MOV R7,#04H
LCALL CAN_CMD_PRG
RET
SENDDATA_PRG:
MOV R0,#SEND_DATA_BUFl
MOV @R0,#0AFH
INC R0
MOV @R0,#08H
MOV A,TEST_DATA
INC R0
MOV @R0,A
MOV R0,#SEND_DATA_BUFl
LCALL CAN_DATA_WRITE
MOV R7,#01
LCALL CAN_CMD_PRG
RET
TO_INIT:
MOV A,TMOD
ANL A,#0F0H
ORL A,#’01H
MOV TMOD,A
MOV TH0,#0FCH
MOV TL0,#066H
MOV 3AH,# 00H
RET
CAN_INT0:
PUSH DPH
PUSH DPL
PUSH PSW
PUSH ACC
MOV DPTR,#REG INTERRUPT
MOV X A,@DPTR
MOV SAVE_INT_INFO,A
JNB ACC.0,CAN_INTl
SETB RCV_GOOD
CAN_INT1:
MOV A,SAVE_INT_INFO
JNB ACC.2,CAN INT2
SETB ERR_FLAG
CAN_INT2:
POP ACC
POP PSW
POP DPL
POP DPH
RETI
TO_INTERRUPT:
PUSH DPH
PUSH DPL
PUSH PSW
PUSH ACC
MOV TH0,#80H
MOV TL0,#26H
LCALL DISPLAY
INC 3AH
MOV A,3AH
CJNE A,#40H,TO_QUIT
MOV 3AH,#00H
SETB SEC_FLAG
INC TEST_DATA
TO_QUIT:
POP ACC
POP PSW
POP DPL
POP DPH
RETI
DISP_ERROR:
MOV R0,#DISPLAYBUFO+1
MOV @R0,#0EH
MOV R0,#DISPLAYBUFO+2
MOV @R0,#l0H
INC R0
MOV A,ERROR_STATUS
ANL A,#0F0H
SWAP A
MOV @R0,A
INC R0
MOV A,ERROR_STATUS
ANL A,# 0FH
MOV @R0,A
RET
DISP_OK:
MOV R0,#DISPLAYBUFO+1
MOV @R0,#11H
MOV R0,#DISPLAYBUFO+2
MOV R0,#l0H
MOV R0,#DISPLAYBUFO+3
MOV A,RCV_DATA_BUF3
ANL A,#0F0H
SWAP A
MOV @R0,A
INC R0
MOV A,RCV_DATA_BUF3
ANL A,#0FH
MOV @R0,A
RET＿
$INCLUDE(SJA_CANFunc. ASM)
$include( display_s. inc)
END
CAN_CREATE_COMMUNATION:
MOV DPTR,#REG_TEST
MOV X A,.DPTR
MOV A,#0AAH
MOV X @DPTR,A
SETB F0
MOV X A,.DPTR
CJNE A,#OAAH,CAN_CM_QUIT
MOV A,#055H
MOV X @DPTR,A
MOV X A,@DPTR
CJNE A,#055H,CAN_CM_QUIT
CLR A
MOV X @DPTR,A
CLR F0
CAN_CM_QUIT:
RET
CAN_ENTER_RETMODEL:
MOV DPTR,#REG_CONTROL
MOV X A,@DPTR
ORL A,#01H
MOV X @DPTR,A
CLR DWF0
MOV X DWA,@DPTR
JB ACC.0,CAN_ER_QUIT
SETB F0
CAN_ER_QUIT:
RET
CAN-QUIT-RETMODEL:
MOV DPTR,#REG_CONTROL
MOV X A,@DPTR
ANL A,#OFEH
MOV X @DPTR,A
CLR F0
MOV X A,@DPTR
JNB ACC. 0,CAN_QR_QUIT
SETB F0
CAN_QR_QUIT:
RET
CAN_SET_BANDRATE:
MOV A,R7
CLR CY
SUBB A,#13
SETB F0
JNC CAN_SETBR_QUIT
CLR F0
MOV A,R7
RL A
MOV DPTR,#CAN SETBR
MOV C A,@A+DPTR
MOV R5,A
MOV A,R7
RL A
INC A
MOV C A,@A+DPTR
MOV R6,A
MOV DPTR,# REGLBTR0
MOV A,R5
MOV X . DPTR,A
SETB F0
MOV X A,QDPTR
XRL A,R5
JNZ CAN_SETBR_QUIT
INC DPTR
MOV A,R6
MOV X @DPTR,A
MOV X A,@DPTR
XRL A,R6
JNZ CAN_SETBR_QUIT
CLR F0
CAN_SETBR_QUIT:
RET
CAN_SETBR:
DB 0EFH,0FFH
DB 0D7H,0FFH
DB 0CBH,0FFH
DB 0C5H,0FFH
DB 0C9H,0A9H
DB 0C2H,0FFH
DB 84H,0A7H
DB 82H,025H
DB 01H,045H
DB 01H,025H
DB 01H,012H
DB 00H,025H
DB 00H,012H
CAN_SET_OBJECT:
MOV DPTR,#REG_ACR
MOV A, R7
MOV X @DPTR,A
MOV X A,@DPTR
SETB F0
XRL A,R7
JNZ CAN_SETO_QUIT
CLR F0
INC DPTR
MOV A,R6
MOV X @DPTR,A
MOV X A,DPTR
SETB F0
XRL A,R6
JNZ CAN_SETO_QUIT
CLR F0
CAN_SETO_QUIT:
RET
CAN_SET_OUTCLK:
MOV DPTR,#REG_OCR
MOV A,R7
MOV X @DPTR,A
MOV X A,@ DPTR
SETB F0
XRL A,R7
JNZ CAN_SETOQ_QUIT
CLR F0
MOV DPTR,#REG CDR
MOV A,R6
MOV X @DPTR,A
MOV B,A
MOV X A,@ DPTR
SETB F0
XRL A,R6
JNZ CAN_SETOC_QUIT
CLR F0
CAN_SETOC_QUIT
RET
CAN DATA WRITE:
MOV DPTR,# REG_STATUS
MOV X A,@DPTR
SETB F0
JNB ACC.3,CAN_DW_QUIT
CLR F0
MOV X A,@DPTR
SETB F0
JNB ACC.2,CAN_DW_QUIT
CLR F0
INC R0
MOV A, R0
DEC R0
MOV DPTR,#REG_TxBufferl
JB ACC.4, CAN_WYB
ANL A,#0FH
ADD A,#02H
MOV R7,A
AJMP CAN_WRTXBUF
CAN_WYB:
MOV R7,#02
CAN_WRTXBUF:
MOV A,R0
MOV X . DPTR,A
SETB F0
MOV X A,@DPTR
XRL A,.R0
JNZ CAN_DW_QUIT
CLR F0
INC R0
INC DPTR
DJNZ R7,CAN_WRTXBUF
CAN_DW_QUIT:
RET
CAN_DATA_RECEIVE:
MOV DPTR,井REG_STATUS
MOV X A,@DPTR
SETB F0
JNB ACC.0,CAN_DR_QUIT
CLR F0
MOV DPTR,#REG_RxBuffer2
MOV X A,@DPTR
MOV DPTR,#REG RxBufferl
JB ACC. 4,CAN_RCVYB
ANL A,#0FH
ADD A,# 02H
MOV R7,A
AJMP CAN_RCVDATA
CAN_RCVYB:
MOV R7,#02
CAN_RCVDATA:
MOV X A,.DPTR
MOV @R0,A
INC DPTR
INC R0
DJNZ R7,CAN RCVDATA
CAN_DR_QUIT:
RET
CAN_CMD_PRG:
MOV A,R7
CJNE A,#01,CAN_CMDl
MOV DPTR,#REG COMMAND
MOV X @DPTR,A
CLR F0
RET
CAN_CMDl:
CJNE A,#02,CAN_CMD2
MOV DPTR,#REG STATUS
MOV X A,@DPTR
SETB F0
JB ACC.5,CAN_CMDLQUIT
CLR F0
CAN_CMD_QUIT:
RET
CAN_CMD2:
CJNE #04,CAN CMD3
MOV DPTR,# REG_COMMAND
MOV X @DPTR,A
NOP
NOP
MOV DPTR,#REG STATUS
MOV X A,.DPTR
SETB F0
JB ACC.0,CAN_DB_QUIT
CLR F0
CAN_DB_QUIT:
RET
CAN_CMD3:
CJNE A,#08,CAN_CMD4
MOV DPTR,# REG_COMMAND
MOV X @DPTR,A
NOP
NOP
MOV DPTR,#REG_STATUS
MOV X A,@DPTR
SETB F0
JB ACC.1,CAN_DOVER_QUIT
CLR F0
CAN_DOVER_QUIT:
RET
SCAN CMD4:
CJNE A,#10H,CAN_CMD5
MOV DPTR,#REG_COMMAND
MOV X @DPTR,A
CLR F0
CAN CMD5:
RET
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