hi!! I'm attempting to do a ck generator with arduino 2009 to test some data low rate equipments (typcal 48/64 kbps)..
Using a simple code to generate a ck 64, I always see a poor stability: the wave seems "jump" about 1/2 times for second..
I try do use digital write or direct port access (more faster..) but the result is always the same.. the wave has some irregularity every 1/2 time for seconds..
Do you meet these problems?
I not used any interrupts or other code except port define and loop cycle with digitalwrite high or low, with simple for cycles to define the time...
It is arduino 2009 "low stable" ??? Probably I make some mistakes.. :-[