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measure in ADC in free running mode

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This commit is contained in:
bigalex 2012-10-05 23:24:03 +02:00
parent 5d3c3bcb51
commit d69160608c
2 changed files with 4 additions and 5 deletions
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8
firmware/lib/bughal.c
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@ -65,10 +65,10 @@ void init_mic(void){
PORTB &= ~(1 << PORTB2);//and to GND
ADMUX = (1<<REFS1) | (1<<REFS0); //use internal 1.1V as reference
ADCSRA = (1<<ADPS1) | (1<<ADPS0);// prescaler F_CPU/8
ADCSRA |= (1<<ADEN); // ADC enable - turn it on
// do one conversion
ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC) ) {} //wait for conversion to end
ADCSRA |= (1<<ADEN) | (1<<ADATE);// ADC enable - turn it on in free running mode
ADCSRB &= (1<<ACME); //leave only ACME as it is (others zerp for free running)
ADMUX = (ADMUX & ~(0x1F)) | 5; // select channel 5
ADCSRA |= (1<<ADSC); // start conversion
uint16_t dummy = ADCW; //read once
return;
}

1
firmware/main.c
View File

@ -71,7 +71,6 @@ void do_mode0(void){
// single measurement
ADMUX = (ADMUX & ~(0x1F)) | 5; // select channel 5
ADCSRA |= (1<<ADSC); // start single conversion
while (ADCSRA & (1<<ADSC) ) {}; // wait for conversion to end
curval =ADCW; // read result
maxval = (curval>maxval) ? curval : maxval;