LED ON and OFF with 2 Push button switches

[Acetronics2]

Have a look to Microchip DS 40040 ... ( tips and tricks for 8 pins ...)

solutions are there !

Alain

[AvionicsMaster1]

Thanks for reminding me about that document. Tons of useful information.

[mikejp56]

Hi Acetronics2 and AvionicsMaster1,
Would either of you guys please post the .pdf for DS40040 from Microchip. It sounds like a must have document, but I cannot find it on Microchip's website.
Thank you.
Regards,
mike

[fratello]

http://ww1.microchip.com/downloads/e...Doc/40040c.pdf
Regards !

[mikejp56]

Hi fratello,
Thanks for the link.
Regards,
mike

[Art]

It’s a flip-flop, so if you do it in software a flip-flop might as well be 1 bit of memory.
You’re going to want to look a the LED in a real program and know if it’s on or off,
so will usually want to store the LED state which would usually represent some program state.

flipflop var bit ‘ 1 = LED is on 0 = LED is off
debounce var byte ‘ button debounce counter
flipflop = 0 ‘ start with LED off at power up, or on if you want to
debounce = 0 ‘ reset debounce counter

trisb.0 = 1’ button pin input
trisb.7 = 0’ LED pin output

cycle: 'program cycle

if debounce > 199 then
if portb.0 = 1 then
flipflop = 1
debounce = 0
else
flipflop = 0
debounce = 0
endif
endif

if flipflop = 1 then ‘ set LED to flip flop state
portb.7 = 1
else
portb.7 = 0
endif

if debounce < 200 then ‘ increment button debounce counter
debounce = debounce + 1
endif

goto cycle ‘ repeat loop forever

[Dave]

But that's only using 1 button Art not 2 as in the title of the thread.....