here is my code:
volatile uint8_t first_edge = 'A';
.................................
ISR(TIMER1_OVF_vect)
{
if(first_edge <= 'Z')
{
avr2pc(first_edge); //avr2pc to transmit character to PC via COM port
++first_edge;
}else
{
first_edge = 'A';
}} my result: I only show 'A' in hyperterminal : => first_edge can; _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
