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91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
#include "xgzp68xx.h"
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#include "esphome/core/log.h"
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#include "esphome/core/hal.h"
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#include "esphome/core/helpers.h"
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#include "esphome/components/i2c/i2c.h"
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namespace esphome {
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namespace xgzp68xx {
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static const char *const TAG = "xgzp68xx.sensor";
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static const uint8_t CMD_ADDRESS = 0x30;
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static const uint8_t SYSCONFIG_ADDRESS = 0xA5;
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static const uint8_t PCONFIG_ADDRESS = 0xA6;
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static const uint8_t READ_COMMAND = 0x0A;
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void XGZP68XXComponent::update() {
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// Request temp + pressure acquisition
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this->write_register(0x30, &READ_COMMAND, 1);
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// Wait 20mS per datasheet
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this->set_timeout("measurement", 20, [this]() {
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uint8_t data[5];
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uint32_t pressure_raw;
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uint16_t temperature_raw;
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float pressure_in_pa, temperature;
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int success;
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// Read the sensor data
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success = this->read_register(0x06, data, 5);
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if (success != 0) {
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ESP_LOGE(TAG, "Failed to read sensor data! Error code: %i", success);
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return;
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}
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pressure_raw = encode_uint24(data[0], data[1], data[2]);
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temperature_raw = encode_uint16(data[3], data[4]);
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// Convert the pressure data to hPa
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ESP_LOGV(TAG, "Got raw pressure=%d, raw temperature=%d ", pressure_raw, temperature_raw);
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ESP_LOGV(TAG, "K value is %d ", this->k_value_);
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// The most significant bit of both pressure and temperature will be 1 to indicate a negative value.
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// This is directly from the datasheet, and the calculations below will handle this.
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if (pressure_raw > pow(2, 23)) {
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// Negative pressure
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pressure_in_pa = (pressure_raw - pow(2, 24)) / (float) (this->k_value_);
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} else {
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// Positive pressure
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pressure_in_pa = pressure_raw / (float) (this->k_value_);
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}
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if (temperature_raw > pow(2, 15)) {
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// Negative temperature
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temperature = (float) (temperature_raw - pow(2, 16)) / 256.0f;
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} else {
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// Positive temperature
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temperature = (float) temperature_raw / 256.0f;
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}
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if (this->pressure_sensor_ != nullptr)
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this->pressure_sensor_->publish_state(pressure_in_pa);
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if (this->temperature_sensor_ != nullptr)
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this->temperature_sensor_->publish_state(temperature);
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}); // end of set_timeout
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}
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void XGZP68XXComponent::setup() {
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ESP_LOGD(TAG, "Setting up XGZP68xx...");
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uint8_t config;
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// Display some sample bits to confirm we are talking to the sensor
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this->read_register(SYSCONFIG_ADDRESS, &config, 1);
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ESP_LOGCONFIG(TAG, "Gain value is %d", (config >> 3) & 0b111);
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ESP_LOGCONFIG(TAG, "XGZP68xx started!");
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}
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void XGZP68XXComponent::dump_config() {
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ESP_LOGCONFIG(TAG, "XGZP68xx");
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LOG_SENSOR(" ", "Temperature: ", this->temperature_sensor_);
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LOG_SENSOR(" ", "Pressure: ", this->pressure_sensor_);
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LOG_I2C_DEVICE(this);
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if (this->is_failed()) {
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ESP_LOGE(TAG, " Connection with XGZP68xx failed!");
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}
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LOG_UPDATE_INTERVAL(this);
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}
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} // namespace xgzp68xx
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} // namespace esphome
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