Hi all,

I'm going explain this as best as i can, my last post on a different topic wasn't very clear.

I currently have the code to a 'buzzer' but now wish to add a restart switch. If the switch transitions from 1 to 0 while the buzzer is sounding i want to restart the timing loop so it continues to buzz for another second.

This is the code I currently have...

0064 HUNDRED EQU 100
D8F0 COUNT EQU -10000
8100 ORG 8100H
8100 MOV TMOD, #01H
8100 LOOP: JNB P1.6, LOOP
. WAIT: JB P1.6, WAIT
. SETB P1.7
. CALL DELAY
. CLR P1.7
. SJMP LOOP
. DELAY: MOV R7,#HUNDRED
. AGAIN: MOV TH0,#HIGH CONT
. MOV TL0,#LOW COUNT
. SETB TR0
. WAIT2: JNB TF0,WAIT2
. CLR TF0
. CLR TR0
. DJNZ R7,AGAIN
. RET
. END