STC micro STC8A8K64D4 Series - Page 528

STC8A8K64D4 Series Manual
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DEC R0
MOV A,@R0
DEC R1
SUBB A,@R1
MOV R6,A
CLR C
MOV A,R7
SUBB A,#40
MOV A,R6
SUBB A,#00H
JC L_check_adc_2 ;if(delta < 40), jump
MOV R7,#1 ;if(delta >= 40) return 1; //Key pressed, return 1
RET
L_check_adc_2:
SETB C
MOV A,R7
SUBB A,#20
MOV A,R6
SUBB A,#00H
JNC L_check_adc_3
MOV R7,#0
RET
L_check_adc_3:
MOV R7,#2
RET
F_ShowLED:
MOV R7,#0
LCALL F_check_adc
MOV A,R7
ANL A,#0FEH
JNZ L_QuitCheck0
MOV A,R7
MOV C,ACC.0
CPL C
MOV P_LED0,C
L_QuitCheck0:
MOV R7,#1
LCALL F_check_adc
MOV A,R7
ANL A,#0FEH
JNZ L_QuitCheck1
MOV A,R7
MOV C,ACC.0
CPL C
MOV P_LED1,C
L_QuitCheck1:
MOV R7,#2
LCALL F_check_adc
MOV A,R7
ANL A,#0FEH
JNZ L_QuitCheck2
MOV A,R7
MOV C,ACC.0
CPL C
MOV P_LED2,C
L_QuitCheck2:
MOV R7,#3