Home-IoT/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2024-11-22 15:08:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

set adc width to 13 bits for esp32-s2 (#3117)

Browse source
This commit is contained in:
Martin 2022-01-26 13:33:59 +01:00 committed by GitHub
parent c5974b8833
commit 7590d5eacb
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
esphome/components/adc/adc_sensor.cpp
View file

@ -15,6 +15,11 @@ namespace esphome {
namespace adc {
static const char *const TAG = "adc";
// 13 bits for S3 / 12 bit for all other esp32 variants
// create a const to avoid the repated cast to enum
#ifdef USE_ESP32
static const adc_bits_width_t ADC_WIDTH_MAX_SOC_BITS = static_cast<adc_bits_width_t>(ADC_WIDTH_MAX - 1);
#endif
void ADCSensor::setup() {
ESP_LOGCONFIG(TAG, "Setting up ADC '%s'...", this->get_name().c_str());
@ -23,14 +28,14 @@ void ADCSensor::setup() {
#endif
#ifdef USE_ESP32
adc1_config_width(ADC_WIDTH_BIT_12);
adc1_config_width(ADC_WIDTH_MAX_SOC_BITS);
if (!autorange_) {
adc1_config_channel_atten(channel_, attenuation_);
}
// load characteristics for each attenuation
for (int i = 0; i < (int) ADC_ATTEN_MAX; i++) {
auto cal_value = esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t) i, ADC_WIDTH_BIT_12,
auto cal_value = esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t) i, ADC_WIDTH_MAX_SOC_BITS,
1100, // default vref
&cal_characteristics_[i]);
switch (cal_value) {