AVR-Chat

On 6/7/2010 9:07 PM, David VanHorn wrote:
> Initially I was thinking that I'd do a bit array, set the unused bits
> to 1, the "not arrived yet bits" to 0, and then flip them to 1 as the
> packets arrive.  When the array ands to FF, then I'm done.   Seems
> simple in concept, but messy so far in C.

To set received bit

receive_fl |= 1 << pktnum;


To check all received

if( receive_fl == 0xFF) {}

Setting not used to one is a little more work but assuming that they are 
not scattered a very straightforward loop will do it.

receive_fl=0;
for( i =  first_not_rec; i < 8; i++) {
     receive_fl |= 1 << i;
     }

Obvious optimizations for known fixed receive groups left as an 
exercise.  Syntax errors and typos are to check if you are following ;)

Looks simple and clean to me.

Robert

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