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17 lines
578 B
C
17 lines
578 B
C
#include "driver/adc.h"
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#include "esp_adc_cal.h"
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static const char *TAG = "adc.c";
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static esp_adc_cal_characteristics_t adc1_chars;
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//Sets up the ADC to read Vcore. Run this before ADC_get_vcore()
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void ADC_init(void) {
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adc1_config_channel_atten(ADC1_CHANNEL_1, ADC_ATTEN_DB_11);
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esp_adc_cal_characterize(ADC_UNIT_1, ADC_ATTEN_DB_11, ADC_WIDTH_BIT_DEFAULT, 0, &adc1_chars);
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}
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//returns the ADC voltage in mV
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uint16_t ADC_get_vcore(void) {
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adc1_config_width(ADC_WIDTH_BIT_DEFAULT);
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return esp_adc_cal_raw_to_voltage(adc1_get_raw(ADC1_CHANNEL_1), &adc1_chars);
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} |