I have a problem with an atmega168.
On my test board I have a jumper on PB1 and a LED on PD5, using internal 8MHz RC-clock.
Given the following program: #include #include #include
INTERRUPT(SIG_PCINT0) { unsigned short i; char j;
for(j=0; j
Atmega168 and peripheral interrupts
Dec 04, 2005
2 Replies
I found the problem. I had a wrong signal name - which meant that each interrupt lead to a reset.
Here's the working program. #include #include #include #include
// PD5=OC0B=T1 SIGNAL(SIG_PIN_CHANGE0) { PORTD ^= _BV(PD5); }
int main(void) { // ENable int sei();
/* INITIALIZE 8MHz/256 -> 31 250 Hz */ CLKPR=_BV(CLKPCE); CLKPR=_BV(CLKPS3);
/* enable PD5 as output */ DDRD|= _BV(PD5);
//PCINT1 erlauben PCMSK0=_BV(PCINT1); PCICR=_BV(PCIE0);
//Pull-Up DDRB=0; PORTB=_BV(PORTB1);
/* BLINK, BLINK ... */ while (1) { sleep_mode(); } }
I found the problem. I had a wrong signal name - which meant that each interrupt lead to a reset.
Here's the working program. #include #include #include #include
// PD5=OC0B=T1 SIGNAL(SIG_PIN_CHANGE0) { PORTD ^= _BV(PD5); }
int main(void) { // ENable int sei();
/* INITIALIZE 8MHz/256 -> 31 250 Hz */ CLKPR=_BV(CLKPCE); CLKPR=_BV(CLKPS3);
/* enable PD5 as output */ DDRD|= _BV(PD5);
//PCINT1 erlauben PCMSK0=_BV(PCINT1); PCICR=_BV(PCIE0);
//Pull-Up DDRB=0; PORTB=_BV(PORTB1);
/* BLINK, BLINK ... */ while (1) { sleep_mode(); } }
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