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Add a soft reset in setup() for bmp280 (#4329)
fixes https://github.com/esphome/issues/issues/3383
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1 changed files with 26 additions and 0 deletions
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@ -1,4 +1,5 @@
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#include "bmp280.h"
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#include "esphome/core/hal.h"
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#include "esphome/core/log.h"
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namespace esphome {
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@ -11,8 +12,11 @@ static const uint8_t BMP280_REGISTER_CONTROL = 0xF4;
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static const uint8_t BMP280_REGISTER_CONFIG = 0xF5;
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static const uint8_t BMP280_REGISTER_PRESSUREDATA = 0xF7;
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static const uint8_t BMP280_REGISTER_TEMPDATA = 0xFA;
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static const uint8_t BMP280_REGISTER_RESET = 0xE0;
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static const uint8_t BMP280_MODE_FORCED = 0b01;
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static const uint8_t BMP280_SOFT_RESET = 0xB6;
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static const uint8_t BMP280_STATUS_IM_UPDATE = 0b01;
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inline uint16_t combine_bytes(uint8_t msb, uint8_t lsb) { return ((msb & 0xFF) << 8) | (lsb & 0xFF); }
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@ -66,6 +70,28 @@ void BMP280Component::setup() {
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return;
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}
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// Send a soft reset.
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if (!this->write_byte(BMP280_REGISTER_RESET, BMP280_SOFT_RESET)) {
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this->mark_failed();
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return;
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}
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// Wait until the NVM data has finished loading.
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uint8_t status;
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uint8_t retry = 5;
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do {
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delay(2);
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if (!this->read_byte(BMP280_REGISTER_STATUS, &status)) {
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ESP_LOGW(TAG, "Error reading status register.");
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this->mark_failed();
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return;
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}
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} while ((status & BMP280_STATUS_IM_UPDATE) && (--retry));
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if (status & BMP280_STATUS_IM_UPDATE) {
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ESP_LOGW(TAG, "Timeout loading NVM.");
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this->mark_failed();
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return;
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}
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// Read calibration
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this->calibration_.t1 = this->read_u16_le_(0x88);
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this->calibration_.t2 = this->read_s16_le_(0x8A);
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