I have 3 atmega8 boards, one as master and two as slaves.
My question is on the slaves board:
If a slave is working on something else (in fact that one of the slaves must keep reading reading DAC), how does it know if there's data send by the master? Do I have to keep checking certain port? Or how to trigger like external interrupt?
My question is on the slaves board:
If a slave is working on something else (in fact that one of the slaves must keep reading reading DAC), how does it know if there's data send by the master? Do I have to keep checking certain port? Or how to trigger like external interrupt?