CAN接口汇编程序
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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
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