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ESP32 ADC use esp-idf (#2024)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Otto Winter
2021-07-20 07:05:56 +02:00
committed by GitHub
parent 766866197b
commit 01a4b4e82f
3 changed files with 51 additions and 17 deletions
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esphome/components/adc/adc_sensor.cpp
+41 -11
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@@ -11,7 +11,30 @@ namespace adc {
static const char *const TAG = "adc";
#ifdef ARDUINO_ARCH_ESP32
void ADCSensor::set_attenuation(adc_attenuation_t attenuation) { this->attenuation_ = attenuation; }
void ADCSensor::set_attenuation(adc_atten_t attenuation) { this->attenuation_ = attenuation; }
inline adc1_channel_t gpio_to_adc1(uint8_t pin) {
switch (pin) {
case 36:
return ADC1_CHANNEL_0;
case 37:
return ADC1_CHANNEL_1;
case 38:
return ADC1_CHANNEL_2;
case 39:
return ADC1_CHANNEL_3;
case 32:
return ADC1_CHANNEL_4;
case 33:
return ADC1_CHANNEL_5;
case 34:
return ADC1_CHANNEL_6;
case 35:
return ADC1_CHANNEL_7;
default:
return ADC1_CHANNEL_MAX;
}
}
#endif
void ADCSensor::setup() {
@@ -21,7 +44,9 @@ void ADCSensor::setup() {
#endif
#ifdef ARDUINO_ARCH_ESP32
analogSetPinAttenuation(this->pin_, this->attenuation_);
adc1_config_channel_atten(gpio_to_adc1(pin_), attenuation_);
adc1_config_width(ADC_WIDTH_BIT_12);
adc_gpio_init(ADC_UNIT_1, (adc_channel_t) gpio_to_adc1(pin_));
#endif
}
void ADCSensor::dump_config() {
@@ -36,18 +61,20 @@ void ADCSensor::dump_config() {
#ifdef ARDUINO_ARCH_ESP32
ESP_LOGCONFIG(TAG, " Pin: %u", this->pin_);
switch (this->attenuation_) {
case ADC_0db:
case ADC_ATTEN_DB_0:
ESP_LOGCONFIG(TAG, " Attenuation: 0db (max 1.1V)");
break;
case ADC_2_5db:
case ADC_ATTEN_DB_2_5:
ESP_LOGCONFIG(TAG, " Attenuation: 2.5db (max 1.5V)");
break;
case ADC_6db:
case ADC_ATTEN_DB_6:
ESP_LOGCONFIG(TAG, " Attenuation: 6db (max 2.2V)");
break;
case ADC_11db:
case ADC_ATTEN_DB_11:
ESP_LOGCONFIG(TAG, " Attenuation: 11db (max 3.9V)");
break;
default: // This is to satisfy the unused ADC_ATTEN_MAX
break;
}
#endif
LOG_UPDATE_INTERVAL(this);
@@ -60,20 +87,23 @@ void ADCSensor::update() {
}
float ADCSensor::sample() {
#ifdef ARDUINO_ARCH_ESP32
float value_v = analogRead(this->pin_) / 4095.0f; // NOLINT
int raw = adc1_get_raw(gpio_to_adc1(pin_));
float value_v = raw / 4095.0f;
switch (this->attenuation_) {
case ADC_0db:
case ADC_ATTEN_DB_0:
value_v *= 1.1;
break;
case ADC_2_5db:
case ADC_ATTEN_DB_2_5:
value_v *= 1.5;
break;
case ADC_6db:
case ADC_ATTEN_DB_6:
value_v *= 2.2;
break;
case ADC_11db:
case ADC_ATTEN_DB_11:
value_v *= 3.9;
break;
default: // This is to satisfy the unused ADC_ATTEN_MAX
break;
}
return value_v;
#endif