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Tanish25 2022-10-05 23:04:27 +05:30
parent 759597d8f9
commit 42bae683e1
6 changed files with 53 additions and 0 deletions

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//sinusoidal PWM using ADC(16-bit PWM to be used)
#define F_CPU 16000000//16Mhz
#define MS_DELAY 1000
#include <avr/io.h>
#include <util/delay.h>
int main(void)
{
DDRB = 0xFF;//Port B set as output
//DDRL = 0xff;//port L direction: output //pins- 49:42
//DDRC = 0xff;//port C direction: output //pins- 37:30
ADCSRA = 0x87;// ADC enabled and prescaler=128
ADMUX = 0x40;// Ref= Vcc// data is right-justified //ADC0 is source pin
while(1)
{
//ADIF=0 ifu wanna reset, otherwise you keep it as 1 so that conversion doesnt start again
//ADCSRA |= (1<<ADSC); //to start conversion, we set ADSC bit to 1
ADCSRA |= 0x40; //ADSC=1
//while(ADCSRA && (1<<ADIF)==0);// waiting for conversion to finish
while(ADIF==0);
OCR1AL = ADCL;
OCR1AH = ADCH;
TCCR1A = 0x83;//non-inverting pwm; mode-7: 10-bit Fast PWM
TCCR1B = 0x10;//prescaler = 8 for frequency to be approx 2kHz
//output of pwm is at pin 13(OC0)
_delay_ms(50);
}
}

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