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Add a soft reset in setup() for bme280. (#3615)

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Donovan Baarda 2022-08-08 05:50:15 +10:00 committed by GitHub
parent 2deef16ebe
commit 599a455150
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1 changed files with 26 additions and 0 deletions
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26
esphome/components/bme280/bme280.cpp
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@ -1,4 +1,5 @@
#include "bme280.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
namespace esphome {
@ -28,6 +29,7 @@ static const uint8_t BME280_REGISTER_DIG_H5 = 0xE5;
static const uint8_t BME280_REGISTER_DIG_H6 = 0xE7;
static const uint8_t BME280_REGISTER_CHIPID = 0xD0;
static const uint8_t BME280_REGISTER_RESET = 0xE0;
static const uint8_t BME280_REGISTER_CONTROLHUMID = 0xF2;
static const uint8_t BME280_REGISTER_STATUS = 0xF3;
@ -39,6 +41,8 @@ static const uint8_t BME280_REGISTER_TEMPDATA = 0xFA;
static const uint8_t BME280_REGISTER_HUMIDDATA = 0xFD;
static const uint8_t BME280_MODE_FORCED = 0b01;
static const uint8_t BME280_SOFT_RESET = 0xB6;
static const uint8_t BME280_STATUS_IM_UPDATE = 0b01;
inline uint16_t combine_bytes(uint8_t msb, uint8_t lsb) { return ((msb & 0xFF) << 8) | (lsb & 0xFF); }
@ -97,6 +101,28 @@ void BME280Component::setup() {
return;
}
// Send a soft reset.
if (!this->write_byte(BME280_REGISTER_RESET, BME280_SOFT_RESET)) {
this->mark_failed();
return;
}
// Wait until the NVM data has finished loading.
uint8_t status;
uint8_t retry = 5;
do {
delay(2);
if (!this->read_byte(BME280_REGISTER_STATUS, &status)) {
ESP_LOGW(TAG, "Error reading status register.");
this->mark_failed();
return;
}
} while ((status & BME280_STATUS_IM_UPDATE) && (--retry));
if (status & BME280_STATUS_IM_UPDATE) {
ESP_LOGW(TAG, "Timeout loading NVM.");
this->mark_failed();
return;
}
// Read calibration
this->calibration_.t1 = read_u16_le_(BME280_REGISTER_DIG_T1);
this->calibration_.t2 = read_s16_le_(BME280_REGISTER_DIG_T2);