Piotr Nikiel wrote:
> On May 8, 2009, at 11:41 AM, Robert von Knobloch wrote:
>
>
>> Hallo,
>>
>> I am writing code for an ATMega 644P and have come across some very
>> strange behaviour.
>> A small part of the code is required to read an asynchronous serial
>> signal (data & clock - low speed) over PORTB pins.
>> The relevant code snippet is:
>>
>> snip
>> #define CLOCK_TIMEOUT 2000
>> #define ASYNCPIN PORTB
>> #define ASYNCCLK 0
>> #define ASYNCDATA 3
>>
>> for (i = 0 ; i < 16 ; ++i)
>> {
>> while ((ASYNCPIN & _BV(ASYNCCLK)) != 0) // Wait for
>> clock low
>>
>>
> (...)
> Sorry for out of topic, but shouldn't you use PINB instead of PORTB
> when reading pin state?
>
> Regards,
> PN
>
>
>
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>
Yes, a typo in my mail.
It is really PINB (referenced through another #define which I omitted
for clarity, thus obscuring all sense)
Thanks,
Robert
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