roboforum.ru

#include <mega48.h>

unsigned long int timen = 0;//повышаю разрешение таймера

// Timer 2 output compare interrupt service routine
interrupt [TIM2_COMPA] void timer2_compa_isr(void)
{
timen++;
}

main() {

unsigned char sw = 0;

// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=0x80;
CLKPR=0x00;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

DDRC=0b111000;//
PORTC.2 = 1;//

DDRD=0b11111100;//

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: 31,250 kHz
// Mode: CTC top=OCR0A
// OC2A output: Disconnected
// OC2B output: Disconnected
ASSR=0x00;
TCCR2A=0x02;
TCCR2B=0x05;
TCNT2=0x00;
OCR2A = 15;//1000 Гц
OCR2B=0x00;


// Timer/Counter 2 Interrupt(s) initialization
TIMSK2=0x02;

// Global enable interrupts
#asm("sei")

while(1)
        {

if(timen > 20000) {PORTC.5++; timen = 0;}
if(PINC.2 == 0 && timen > 50) {PORTC.4++; timen = 0;}

}