STC micro STC8A8K64D4 Series - Page 364

STC8A8K64D4 Series Manual
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ORG 0093H
LJMP UART4_ISR
ORG 0100H
UART4_ISR:
PUSH ACC
PUSH PSW
MOV PSW,#08H
MOV A,S4CON
JNB ACC.1,CHKRI
ANL S4CON,#NOT 02H
CLR BUSY
CHKRI:
JNB ACC.0,UART4ISR_EXIT
ANL S4CON,#NOT 01H
MOV A,WPTR
ANL A,#0FH
ADD A,#BUFFER
MOV R0,A
MOV @R0,S4BUF
INC WPTR
UART4ISR_EXIT:
POP PSW
POP ACC
RETI
UART4_INIT:
MOV S4CON,#10H
MOV T2L,#0E8H ;65536-11059200/115200/4=0FFE8H
MOV T2H,#0FFH
MOV AUXR,#14H
CLR BUSY
MOV WPTR,#00H
MOV RPTR,#00H
RET
UART4_SEND:
JB BUSY,$
SETB BUSY
MOV S4BUF,A
RET
UART4_SENDSTR:
CLR A
MOVC A,@A+DPTR
JZ SEND4END
LCALL UART4_SEND
INC DPTR
JMP UART4_SENDSTR
SEND4END:
RET
MAIN:
MOV SP, #5FH
MOV P0M0, #00H
MOV P0M1, #00H