Interrupt on change for IR input - is it a good way to go

[longpole001]

The IR sig is " clean " for the most part , the random signal it seems to pickup are mainly from lights around ,

i have not done that much with interrupts say more than just check a timer has expired flag , i am also short of program space , but ill have to work around that issue . will remove other code routines to see if the COI detected ok

The get IR routine has pulsin_max set to the max time of valid pulse length before timing out, which helps but you still need to go call the routine very regular , and thats killing me

I do have 2 other items on a makeshift SPI bus that will eventually i like to use a pin for interrupts , instead of polling a register flag , but will have to wait till i have a bigger pic chip to arrive( 16F1825) , with the new programmer

i am assuming that i can services other interrupt routines in the same way as what i am looking at with the IR routine on IOC ?

managing multi interupts from 2 or more pins would be something new also to me for pics , so code ref examples on the best way to do this would be Very helpful.

Il go get DT_int14 routines and study them a bit more today

The learn curve continues


Cheers

sheldon

[dhouston]

IR tends to be very clean, especially so if you use a resistor/cap as Anand suggested.

It's been several years since I did a lot of hands on testing but sunlight and some old-line fluorescent tubes created problems. I've never tested with CFLs but suspect they could cause a lot of problems if their switching power supply uses a frequency that's a near multiple of the IR carrier frequency.

[eggman]

In my experience the shielded ones (some sort of aluminum shield with a small window) are much less noisy
The ones I use mostly come from old VHS decks or TV's