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Ignore whitespace Rev 341 → Rev 342

/PIC Projects/PICX_27J13/base_ADC.c
0,0 → 1,55
#include <xc.h>
#include "defines.h"
#include "base_ADC.h"
 
static ADC_DATA *adc_data_p;
 
void ADC_Init(ADC_DATA *data, char TAD, char FOSC) {
adc_data_p = data;
ADC_AN0_TRIS = 1;
ADC_AN1_TRIS = 1;
ADC_AN2_TRIS = 1;
 
adc_data_p->last_channel = 0;
adc_data_p->result = 0;
 
ADCON0bits.VCFG1 = 0; // VRef- = AVss
ADCON0bits.VCFG0 = 1; // VRef+ != AVdd
ADCON1bits.ADFM = 1; // Right justified result
ADCON1bits.ADCAL = 1; // Calibrate A/D
ADCON1bits.ACQT = TAD;
ADCON1bits.ADCS = FOSC;
ADCON0bits.ADON = 1; // Enable A/D module
 
ADCON0bits.GO_DONE = 1; // Start calibration
while (ADCON0bits.GO_DONE); // Wait for calibration to finish
PIR1bits.ADIF = 0; // Clear the IF flag
ADCON1bits.ADCAL = 0; // Normal A/D operation
 
PIE1bits.ADIE = 1; // Enable A/D interrupt
 
}
 
void ADC_Start(char channel) {
adc_data_p->last_channel = channel;
ADCON0bits.CHS = channel; // Set A/D channel
ADCON0bits.GO_DONE = 1; // Start A/D conversion
}
 
void ADC_Stop() {
ADCON0bits.ADON = 0; // Disable A/D module
}
 
void ADC_Interrupt_Handler() {
adc_data_p->result = ADRES;
}
 
char ADC_Get_Result(unsigned int* ret) {
if (ADCON0bits.GO_DONE) {
return 0;
} else {
*ret = adc_data_p->result;
return 1;
}
}