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Code Issues Releases Wiki Activity

Support ADC on RP2040 (#4040)

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This commit is contained in:
Jesse Hills
2022-11-17 13:51:08 +13:00
committed by GitHub
parent 65030e1c37
commit 719c212009
4 changed files with 69 additions and 2 deletions
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51
esphome/components/adc/adc_sensor.cpp
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@@ -11,6 +11,10 @@ ADC_MODE(ADC_VCC)
#endif
#endif
#ifdef USE_RP2040
#include <hardware/adc.h>
#endif
namespace esphome {
namespace adc {
@@ -32,9 +36,13 @@ static const int ADC_MAX = (1 << SOC_ADC_RTC_MAX_BITWIDTH) - 1; // 4095 (12 b
static const int ADC_HALF = (1 << SOC_ADC_RTC_MAX_BITWIDTH) >> 1; // 2048 (12 bit) or 4096 (13 bit)
#endif
void ADCSensor::setup() {
#ifdef USE_RP2040
extern "C"
#endif
void
ADCSensor::setup() {
ESP_LOGCONFIG(TAG, "Setting up ADC '%s'...", this->get_name().c_str());
#ifndef USE_ADC_SENSOR_VCC
#if !defined(USE_ADC_SENSOR_VCC) && !defined(USE_RP2040)
pin_->setup();
#endif
@@ -63,6 +71,16 @@ void ADCSensor::setup() {
}
#endif // USE_ESP32
#ifdef USE_RP2040
static bool initialized = false;
if (!initialized) {
adc_init();
initialized = true;
}
#endif
ESP_LOGCONFIG(TAG, "ADC '%s' setup finished!", this->get_name().c_str());
}
void ADCSensor::dump_config() {
@@ -98,6 +116,12 @@ void ADCSensor::dump_config() {
}
}
#endif // USE_ESP32
#ifdef USE_RP2040
if (this->is_temperature_)
ESP_LOGCONFIG(TAG, " Pin: Temperature");
else
LOG_PIN(" Pin: ", pin_);
#endif
LOG_UPDATE_INTERVAL(this);
}
@@ -175,6 +199,29 @@ float ADCSensor::sample() {
}
#endif // USE_ESP32
#ifdef USE_RP2040
float ADCSensor::sample() {
if (this->is_temperature_) {
adc_set_temp_sensor_enabled(true);
delay(1);
adc_select_input(4);
} else {
uint8_t pin = this->pin_->get_pin();
adc_gpio_init(pin);
adc_select_input(pin - 26);
}
int raw = adc_read();
if (this->is_temperature_) {
adc_set_temp_sensor_enabled(false);
}
if (output_raw_) {
return raw;
}
return raw * 3.3f / 4096.0f;
}
#endif
#ifdef USE_ESP8266
std::string ADCSensor::unique_id() { return get_mac_address() + "-adc"; }
#endif