[adc] Split files by platform (#7940)

esphome/components/adc/adc_sensor_rp2040.cpp

@@ -0,0 +1,93 @@
+#ifdef USE_RP2040
+
+#include "adc_sensor.h"
+#include "esphome/core/log.h"
+
+#ifdef CYW43_USES_VSYS_PIN
+#include "pico/cyw43_arch.h"
+#endif  // CYW43_USES_VSYS_PIN
+#include <hardware/adc.h>
+
+namespace esphome {
+namespace adc {
+
+static const char *const TAG = "adc.rp2040";
+
+void ADCSensor::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up ADC '%s'...", this->get_name().c_str());
+  static bool initialized = false;
+  if (!initialized) {
+    adc_init();
+    initialized = true;
+  }
+}
+
+void ADCSensor::dump_config() {
+  LOG_SENSOR("", "ADC Sensor", this);
+  if (this->is_temperature_) {
+    ESP_LOGCONFIG(TAG, "  Pin: Temperature");
+  } else {
+#ifdef USE_ADC_SENSOR_VCC
+    ESP_LOGCONFIG(TAG, "  Pin: VCC");
+#else
+    LOG_PIN("  Pin: ", this->pin_);
+#endif  // USE_ADC_SENSOR_VCC
+  }
+  ESP_LOGCONFIG(TAG, "  Samples: %i", this->sample_count_);
+  LOG_UPDATE_INTERVAL(this);
+}
+
+float ADCSensor::sample() {
+  if (this->is_temperature_) {
+    adc_set_temp_sensor_enabled(true);
+    delay(1);
+    adc_select_input(4);
+    uint32_t raw = 0;
+    for (uint8_t sample = 0; sample < this->sample_count_; sample++) {
+      raw += adc_read();
+    }
+    raw = (raw + (this->sample_count_ >> 1)) / this->sample_count_;  // NOLINT(clang-analyzer-core.DivideZero)
+    adc_set_temp_sensor_enabled(false);
+    if (this->output_raw_) {
+      return raw;
+    }
+    return raw * 3.3f / 4096.0f;
+  }
+
+  uint8_t pin = this->pin_->get_pin();
+#ifdef CYW43_USES_VSYS_PIN
+  if (pin == PICO_VSYS_PIN) {
+    // Measuring VSYS on Raspberry Pico W needs to be wrapped with
+    // `cyw43_thread_enter()`/`cyw43_thread_exit()` as discussed in
+    // https://github.com/raspberrypi/pico-sdk/issues/1222, since Wifi chip and
+    // VSYS ADC both share GPIO29
+    cyw43_thread_enter();
+  }
+#endif  // CYW43_USES_VSYS_PIN
+
+  adc_gpio_init(pin);
+  adc_select_input(pin - 26);
+
+  uint32_t raw = 0;
+  for (uint8_t sample = 0; sample < this->sample_count_; sample++) {
+    raw += adc_read();
+  }
+  raw = (raw + (this->sample_count_ >> 1)) / this->sample_count_;  // NOLINT(clang-analyzer-core.DivideZero)
+
+#ifdef CYW43_USES_VSYS_PIN
+  if (pin == PICO_VSYS_PIN) {
+    cyw43_thread_exit();
+  }
+#endif  // CYW43_USES_VSYS_PIN
+
+  if (this->output_raw_) {
+    return raw;
+  }
+  float coeff = pin == PICO_VSYS_PIN ? 3.0f : 1.0f;
+  return raw * 3.3f / 4096.0f * coeff;
+}
+
+}  // namespace adc
+}  // namespace esphome
+
+#endif  // USE_RP2040