SOURCE PROGRAM

{ pulse(); read PINB; } while bit_is_clear(read,7); DDRB 0xff; } int main(void) { DDRD 0xff; unsigned int data; DDRB 0xFF; while(1) { DDRA 0b11110101; PORTA 0b11110100; ADCSRA | (1 << ADSC)|(1<<ADEN); // Enable ADC ADMUX 0b00100001; while ( bit_ is_ clear( ADCSRA, ADIF));// wait until conversion complete. data ADCH; sata (data/25); DDRA 0b11111010; PORTA 0b11111000; ADCSRA | (1 << ADSC)|(1<<ADEN); // En-