roboforum.ru

#include <mega32.h>

#define LED1 PORTC.5
#define LED2 PORTC.6

#define FIRST_ADC_INPUT 7
#define LAST_ADC_INPUT 7
#define ADC_VREF_TYPE 0x00                             

unsigned int adc_data;
void AVR_INIT(void);

short divider = 0;


// External IRQ 0 service routine
interrupt [EXT_INT0] void ext_int0_isr(void)
{
// Place your code here

}

// TIMER 0 overflow interrupt service routine
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{
// Reinitialize Timer 0 value
TCNT0=0x05;
// Place your code here

if((adc_data)&(0x10)) LED1 = 1;
else LED1 = 0;

divider++;
if(divider>adc_data)   // ************** вот тут в зависимости от показаний АЦП должна частота меандра на LED2 менятся
{
    divider = 0;
    LED2 =(!(LED2));
}

}

// ADC interrupt service routine
// with auto input scanning
interrupt [ADC_INT] void adc_isr(void)
{
// Read the AD conversion result
adc_data=ADCH;
// Select next ADC input
ADMUX=(FIRST_ADC_INPUT|ADC_VREF_TYPE)+7;
// Start the AD conversion
ADCSRA|=0x40;
}

// Declare your global variables here

void main(void)
{
AVR_INIT();
LED2 = !!(1==1);
while (1)
      {
      // Place your code here

      };
}       

void AVR_INIT(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTB=0x00;
DDRB=0xFF;

// Port C initialization
// Func7=In Func6=Out Func5=Out Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=0 State5=0 State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x60;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 15,625 kHz
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x05;
TCNT0=0x05;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer 1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: On
// INT0 Mode: Rising Edge
// INT1: Off
// INT2: Off
GICR|=0x40;
MCUCR=0x03;
MCUCSR=0x00;
GIFR=0x40;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x01;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 125,000 kHz
// ADC Voltage Reference: AVCC pin
// Only the 8 most significant bits of
// the AD conversion result are used
ADMUX=FIRST_ADC_INPUT|ADC_VREF_TYPE;
ADCSRA=0xCF;

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

#include <avr/io.h>
#include <avr/interrupt.h>
ISR(ADC_vect)
{
// ...............
}