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