STC micro STC8A8K64D4 Series - Page 850

STC8A8K64D4 Series Manual
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LCALL ISP_RECVACK ;Receive response data
LJMP ISP_DOWNLOAD ;Jump to download interface
GOTOAP:
CLR A ; Reset SFR to reset value
MOV TCON,A
MOV TMOD,A
MOV TL0,A
MOV TH0,A
MOV TL1,A
MOV TH1,A
MOV SCON,A
MOV AUXR,A
LJMP APENTRY ; Run the user program normally
ISP_RECVACK:
LCALL ISP_RECVUART
JC GOTOAP
XRL A,#7FH
JZ ISP_RECVACK ; skip sync data
CJNE A,#25H,GOTOAP ; Response data 1 detection
LCALL ISP_RECVUART
JC GOTOAP
CJNE A,#69H,GOTOAP ; Response data 2 detection
RET
ISP_RECVUART:
CLR A
MOV TL0,A ; Initialize timeout timer
MOV TH0,A
CLR TF0
MOV WDT_CONTR,#17H ;clear watchdog
ISP_RECVWAIT:
JBC TF0,ISP_RECVTIMEOUT ; Timeout detection
JNB RI,ISP_RECVWAIT ; wait for receive to complete
MOV A,SBUF ; Read serial data
CLR RI ;Clear flag
CLR C ; Receive serial data correctly
RET
ISP_RECVTIMEOUT:
SETB C ; timeout
RET
ISP_SENDUART:
MOV WDT_CONTR,#17H ;clear watchdog
JNB TI,ISP_SENDUART ; Wait for the previous data transmission to complete
CLR TI ; Clear flag
MOV SBUF,A ; send current data
RET
ISP_ERASEIAP:
MOV WDT_CONTR,#17H ;clear watchdog
MOV IAP_CMD,#3 ; Erase command
MOV IAP_TRIG,#5AH ; Trigger ISP command
MOV IAP_TRIG,#0A5H
NOP
NOP
NOP
NOP