IR help

[geckogrotto]

Hey Dave I'm working on a universal remote of sorts for some cameras.
By sampleing the pulsetrain you mean like this?
COUNT GPIO.4, 1, Pulsedata

[dhouston]

By sampleing the pulsetrain you mean like this?
COUNT GPIO.4, 1, Pulsedata

There are both DIY and commercial devices that will do this. Of course, most folks who post here are wheel reinventors.

By sampling the pulsetrain I mean checking the pin every 25µS (or less) and setting a bit in an array to indicate its state. You end up with something like...

• 11111100000111000111000000111000111000000000000000

which is an image of the pulsetrain where each digit represents a 25µS sample.

IR receiver modules are active low, so you'll get an inverted output with 0s where there's IR and 1s where there's none.