FM0 (bi-phase space) decoding!

Hey everyOne!

I'm having problems to decode the FM0 [
http://www.grantronics.com.au/serialformats.html ] data , the data rate
is 40 kbps and my atmega16 is using 16 Mhz clock.


MCU = atmega16
CPUclk = 16 Mhz
Prescaler Value = 8
Datarate = 40 kbps
Bit rate = 25 micro second

I have tried to use external interrupt pin for one edge and as well as
for both edges (Inverting the interrupt sense) but no luck so far. The
error rate is more than 50% ;-).

Any good pointers?

Regards,
ali

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