| 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; |
| } |
| } |