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
++first_edge;
}else
{
first_edge = 'A';
}
}
my result:
I only show 'A' in hyperterminal :
=> first_edge can't update values;
Please tell me why?
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