>> > I can see the data and clockstring on the oscilloscope
>> > but on the smartcard has nothing been written!
>>
>> Is the data polarity correct ?
>
>Yes, the data polarity is correct and the
>frequency out from the receiver is about 1 kHz.

What happens if you work from basics, and get the smartcard side going
without the IR part in the loop, i.e. connect direct to the 12F629. Then you
have only one unknown instead of two.

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