48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/**
|
|
* Copyright (c) 2022 Nicolai Electronics
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*/
|
|
|
|
#include <sdkconfig.h>
|
|
#include <esp_log.h>
|
|
#include <driver/gpio.h>
|
|
#include <freertos/FreeRTOS.h>
|
|
#include <freertos/semphr.h>
|
|
#include <freertos/task.h>
|
|
#include "bme680.h"
|
|
#include "managed_i2c.h"
|
|
|
|
static const char *TAG = "BME680";
|
|
|
|
esp_err_t bme680_check_id(BME680* device) {
|
|
uint8_t chip_id;
|
|
esp_err_t res = i2c_read_reg(device->i2c_bus, device->i2c_address, BME680_REG_CHIP_ID, &chip_id, 1);
|
|
if (res != ESP_OK) return res;
|
|
if (chip_id != BME680_CHIP_ID) {
|
|
ESP_LOGE(TAG, "Unexpected chip id value 0x%02X, expected 0x%02X", chip_id, BME680_CHIP_ID);
|
|
return ESP_FAIL;
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t bme680_reset(BME680* device) {
|
|
uint8_t value = 0xFF;
|
|
esp_err_t res = i2c_write_reg_n(device->i2c_bus, device->i2c_address, BME680_REG_RESET, &value, 1);
|
|
if (res != ESP_OK) return res;
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t bme680_init(BME680* device) {
|
|
esp_err_t res = bme680_reset(device);
|
|
if (res != ESP_OK) return res;
|
|
vTaskDelay(100 / portTICK_PERIOD_MS);
|
|
res = bme680_check_id(device);
|
|
if (res != ESP_OK) return res;
|
|
return res;
|
|
}
|
|
|
|
esp_err_t bme680_deinit(BME680* device) {
|
|
return bme680_reset(device);
|
|
}
|