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PICAXE
PICAXE
Two Sensors for Crossing
Program 4:
PauseBeforeStart: 'prevents
detecting slow button push
low 1 ‘turn
off LED 1
low 2 ‘turn
off LED 2
pause 1000 'pause
1 second
CheckButtons:
b1=0:b2=0
if pin3 = 1 and pin4 = 1 then CheckButtons
if pin3=0 then
b1=1 ‘save which button hit
first
goto flash
endif
b2=1 ‘save
which button hit first
Flash:
high 1 ‘LED 1 on
low 2 ‘LED 2 off
FlashAgain:
for w3= 1 to 250 'check for button before changing
lights
if
b2=1 and pin3=0 then PauseBeforeStart
if
b1=1 and pin4=0 then PauseBeforeStart
next w3
toggle 1:toggle 2 ‘switch lights
goto FlashAgain: 'continue
checking buttons