74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
|
/*
|
||
|
|
* adc.c
|
||
|
|
*
|
||
|
|
* Created: 09/12/2021 16:31:16
|
||
|
|
* Author: n0x
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "adc.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
adc_init(void)
|
||
|
|
{
|
||
|
|
ADMUX = (1<<REFS1)|
|
||
|
|
(0<<REFS0)| /* Set Voltage reference to 2.56V */
|
||
|
|
(0<<ADLAR) /* Set ADLAR to 0 to not left adjust the presentation of the conversion result */
|
||
|
|
;
|
||
|
|
|
||
|
|
ADCSRA = (1<<ADEN)| /* Enable ADC */
|
||
|
|
(0<<ADATE)| /* Disable the ADC auto trigger */
|
||
|
|
(1<<ADIE)| /* Enable the ADC interrupt */
|
||
|
|
(1<<ADPS2)|
|
||
|
|
(1<<ADPS1)|
|
||
|
|
(1<<ADPS0) /* Set ADC Prescaler to 128 */
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
volatile int done = 1;
|
||
|
|
|
||
|
|
/* ADC 1 */
|
||
|
|
uint16_t
|
||
|
|
adc_get_poti(void)
|
||
|
|
{
|
||
|
|
uint16_t adc;
|
||
|
|
ADCSRA &= ~(1<<ADIE); /* Disable interrupt */
|
||
|
|
|
||
|
|
ADMUX |= (1<<MUX0); /* Set ADMUX to access ADC channel 1 */
|
||
|
|
ADCSRA |= (1<<ADSC); /* Start the conversion */
|
||
|
|
|
||
|
|
done = 0; /* reset the done flag to false */
|
||
|
|
|
||
|
|
while(done == 0); /* Wait till conversion completes */
|
||
|
|
|
||
|
|
adc = ADC;
|
||
|
|
|
||
|
|
ADCSRA |= (1<<ADIE); /* Enable the interrupt again */
|
||
|
|
|
||
|
|
return adc;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* ADC 0 */
|
||
|
|
uint16_t
|
||
|
|
adc_get_LM35(void)
|
||
|
|
{
|
||
|
|
uint16_t adc;
|
||
|
|
ADCSRA &= ~(1<<ADIE); /* Disable interrupt */
|
||
|
|
|
||
|
|
ADMUX &= (0<<MUX0); /* Set ADMUX to access ADC channel 0 */
|
||
|
|
ADCSRA |= (1<<ADSC); /* Start the conversion */
|
||
|
|
|
||
|
|
done = 0; /* reset the done flag to false */
|
||
|
|
|
||
|
|
while(done == 0); /* Wait till conversion completes */
|
||
|
|
|
||
|
|
adc = ADC;
|
||
|
|
|
||
|
|
ADCSRA |= (1<<ADIE); /* Enable the interrupt again */
|
||
|
|
|
||
|
|
return adc;
|
||
|
|
}
|
||
|
|
|
||
|
|
ISR(ADC_vect){
|
||
|
|
done = 1; /* set the done flag to true */
|
||
|
|
}
|