Re: [avr-gcc-list] AVR assembly for fast bit bang

[Hugo González Monteverde]

Hi Mike,

Do you have any code for the C implementation of what you are trying to 
do? What protocol are you implementing? is it SPI one way? TWI? what 
frequency will the clock be? Will you be using interrupts in any way, or 
how will you do your communication? 90CAN128 is a high performance uC 
with a wicked fast clock...

There's no easy way to know  the "best" way to implement this. Unless 
you find the bottleneck, there's little point in optimizing to assembly..

Hugo

Mike S. wrote:
> Hello to all,
> Can anyone tell me the best (faster) way to implement bit shifting (serial 
> synch protocol
>  -in a bit bang fashion-) with two general purpose digital pins (one pin for data the other 
> for clock)? Using C is not fast enough! I need assembly! 
>
> Thanks in advance 
> Best Regards
>
> (I use the AT90CAN128)
>
> Bruno Miguel
>
>
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