i am using interrupt program to count the number of blocks passing through a sensor on each passing i use the sensor signal as an interrupt and increament the value. on passing of a specified number of blocks i want a change in LEDs connected. Can anyone help me with the program i have written in assembly language and am using 89C52 in this program i want 8 blocks to pass before led changes.
the program is as follows: ORG 000H SJMP LABEL ORG 003H ACALL ISR RETI
MAIN: MOV R3,8d SETB IP.0 SETB TCON.0 SETB IE.0 SETB IE.7 MOV A,#00000001B ABC: JZ R3,LABEL SJMP ABC LABEL: CPL A MOV P1,A JMP ABC
ISR: CALL DELAY DEC R3 DELAY: MOV R2,#42d MOV R1,#12h MOV R0,#43h loop: DJNZ R0,loop DJNZ R1,loop RET END