STC micro STC8A8K64D4 Series - Page 432

STC8A8K64D4 Series Manual
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S4BUF DATA 85H
IE2 DATA 0AFH
BUSY BIT 20H.0
WPTR DATA 21H
RPTR DATA 22H
BUFFER DATA 23H ;16 bytes
P0M1 DATA 093H
P0M0 DATA 094H
P1M1 DATA 091H
P1M0 DATA 092H
P2M1 DATA 095H
P2M0 DATA 096H
P3M1 DATA 0B1H
P3M0 DATA 0B2H
P4M1 DATA 0B3H
P4M0 DATA 0B4H
P5M1 DATA 0C9H
P5M0 DATA 0CAH
ORG 0000H
LJMP MAIN
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