how to decode a burst IR signal?

[selina_T]

Now i am doing a IR reciever. The IR signal i recieve will burst in about 32us (which represent by '0') and will not burst in about 32us (which represent by '1'). So i will decode i burst signal to the '10011010' form. Please do advise to me, thanks!

[newguy]

Check the code library. There are a few different examples of IR decoding software there.

[selina_T]

where is the code library?i am using PIC16F57 CCS Compiler to write my program....

[newguy]

http://www.ccsinfo.com/forum/viewforum.php?f=2&sid=4cedc4b0c471db4cfdbb1cc06d0793b2

[selina_T]

i found this code in "Infrared receiver for SONY remotes", do you where the interrupt rate formula from? i don't understand the formula.

Infrared Receiver for SONY 12-bit protocol (SIRC)

Compiler: CCS PCH 3.242
Processor: PIC18F452 @ 32MHz
IR Sensor: TSOP1738
Circuit: Standard from TSOP1738 Datasheet, OUT to
RB0
Requires LCD on port D, LED+resistor on RC2
LED blinks when a command is recognised.
Author: Aurelian Nichita [email protected]

Interrupt rate:
4/32000000*65536*1 = 8.192 ms

[newguy]

http://www.ccsinfo.com/forum/viewtopic.php?t=22467

[selina_T]

thank for the link, now i understand the formula. But now i am not use timer and interrupt, i jz use crystal to generate my IR pulses, when i decode, what method shoud i use in C programming?