ESP_ADC_CAL_VAL_EFUSE_VREF = 0, /**< Characterization based on reference voltage stored in eFuse*/ ESP_ADC_CAL_VAL_EFUSE_TP = 1, /**< Characterization based on Two Point values stored in eFuse*/ ESP_ADC_CAL_VAL_DEFAULT_VREF = 2, /**< Characterization based on default reference ...
esp_adc_cal_value_t val_type = esp_adc_cal_characterize(unit, atten, ADC_WIDTH_BIT_12, DEFAULT_VREF, adc_chars); //Check type of calibration value used to characterize ADC if (val_type == ESP_ADC_CAL_VAL_EFUSE_VREF) { printf("eFuse Vref"); } else if (val_type == ESP_ADC_...
Result of vref is 0.0 on ESP32S3. However, the same code runs on an old ESP32 PICO D4 returns 1100. Does esp_adc_cal_characterize() work on esp32s3? Johnlbernstone Posts: 936 Joined: Mon Jul 22, 2019 3:20 pm Re: Does esp_adc_cal_characterize() work on ESP32S3?Quote...
这就需要存储在eFuse里的参数或者是咱们用户自己提供的参数,至于这些参数怎么得到,咱不讲了,就知道esp_adc_cal_raw_to_voltage(reading, adc_chars);就是通过一条斜率曲线把读取adc1_get_raw()andadc2_get_raw()的数值转变成了mV的就行了,当然是用之前要得到斜率曲线的代码必须码上如下: //Characterize ADC ...
63}6465//描述 ADC66adc_chars =calloc(1,sizeof(esp_adc_cal_characteristics_t));67esp_adc_cal_value_t val_type =esp_adc_cal_characterize(unit, atten, ADC_WIDTH_BIT_12, DEFAULT_VREF, adc_chars);68print_char_val_type(val_type);6970//连续采样ADC171while(1) {72uint32_t adc_reading ...
esp_adc_cal_characteristics_t *adc_chars;//Range 0-4096 adc1_config_width(ADC_WIDTH_BIT_12);// full voltage range adc1_config_channel_atten(ADC1_CHANNEL_7, ADC_ATTEN_DB_11);// get the ADC characteristics esp_adc_cal_characterize(ADC_UNIT_1,ADC_ATTEN_DB_11,ADC_WIDTH_BIT_12,DEFAULT...
static esp_adc_cal_characteristics_t adc1_chars; //uint16_t voltage; esp_adc_cal_characterize(ADC_UNIT_1, ADC_ATTEN_DB_11, ADC_WIDTH_BIT_DEFAULT, 0, &adc1_chars); ESP_ERROR_CHECK(adc1_config_width(ADC_WIDTH_BIT_DEFAULT)); ESP_ERROR_CHECK(adc1_config_channel_atten(ADC1_CHANNEL_6...
esp_adc_cal_characterize(ADC_UNIT_1, ADC_EXAMPLE_ATTEN, ADC_WIDTH_BIT_DEFAULT, 0, &adc1_chars); } else { ESP_LOGE("CALIBRATION", "Invalid arg"); } return cali_enable; } void app_main(void) { esp_err_t ret = ESP_OK; uint32_t voltage = 0; bool cali_enable = adc_calibration...
(/zephyr/drivers/adc/adc_esp32.c) in the function adc_esp32_channel_setup the function esp_adc_cal_characterize is called where WIDTH_MASK is inserted into the bit_width parameter. After testing i found that bit_width parameter should be 12 (12bit adc), but WIDTH_MASK return number 3....
{ esp_adc_cal_characteristics_t adc_chars; esp_adc_cal_value_t val_type = esp_adc_cal_characterize(ADC_UNIT_2, ADC_ATTEN_DB_11, ADC_WIDTH_BIT_12, 1100, &adc_chars); uint32_t v = esp_adc_cal_raw_to_voltage(analogRead(14), &adc_chars); float battery_voltage = ((float)v /...