Tanish25
2 years ago
6 changed files with 53 additions and 0 deletions
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//sinusoidal PWM using ADC(16-bit PWM to be used)
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#define F_CPU 16000000//16Mhz
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#define MS_DELAY 1000 |
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#include <avr/io.h> |
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#include <util/delay.h> |
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int main(void) |
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{ |
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DDRB = 0xFF;//Port B set as output
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//DDRL = 0xff;//port L direction: output //pins- 49:42
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//DDRC = 0xff;//port C direction: output //pins- 37:30
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ADCSRA = 0x87;// ADC enabled and prescaler=128
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ADMUX = 0x40;// Ref= Vcc// data is right-justified //ADC0 is source pin
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while(1) |
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{ |
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//ADIF=0 ifu wanna reset, otherwise you keep it as 1 so that conversion doesnt start again
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//ADCSRA |= (1<<ADSC); //to start conversion, we set ADSC bit to 1
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ADCSRA |= 0x40; //ADSC=1
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//while(ADCSRA && (1<<ADIF)==0);// waiting for conversion to finish
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while(ADIF==0); |
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OCR1AL = ADCL; |
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OCR1AH = ADCH; |
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TCCR1A = 0x83;//non-inverting pwm; mode-7: 10-bit Fast PWM
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TCCR1B = 0x10;//prescaler = 8 for frequency to be approx 2kHz
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//output of pwm is at pin 13(OC0)
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_delay_ms(50); |
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} |
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} |
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