alexey.zholtikov/zh_bh1750
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Version 1.0.1

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Added support new I2C driver for ESP32.
This commit is contained in:
Alexey Zholtikov
2024-06-16 14:08:35 +03:00
parent 236feb1140
commit f77318150c
4 changed files with 68 additions and 24 deletions
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46
zh_bh1750.c
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@ -21,10 +21,13 @@ static bool _is_first_start = false;
static uint8_t _time = 0;
static uint8_t _sensivity = SENSITIVITY_DEFAULT;
static bool _is_initialized = false;
#ifndef CONFIG_IDF_TARGET_ESP8266
static i2c_master_dev_handle_t _bh1750_handle = {0};
#endif
static const char *TAG = "zh_bh1750";
esp_err_t zh_bh1750_init(zh_bh1750_init_config_t *config)
esp_err_t zh_bh1750_init(const zh_bh1750_init_config_t *config)
{
ESP_LOGI(TAG, "BH1750 initialization begin.");
if (config == NULL)
@ -33,6 +36,19 @@ esp_err_t zh_bh1750_init(zh_bh1750_init_config_t *config)
return ESP_ERR_INVALID_ARG;
}
_init_config = *config;
#ifndef CONFIG_IDF_TARGET_ESP8266
i2c_device_config_t bh1750_config = {
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
.device_address = _init_config.i2c_address,
.scl_speed_hz = 100000,
};
i2c_master_bus_add_device(_init_config.i2c_handle, &bh1750_config, &_bh1750_handle);
if (i2c_master_probe(_init_config.i2c_handle, _init_config.i2c_address, 1000 / portTICK_PERIOD_MS) != ESP_OK)
{
ESP_LOGE(TAG, "BH1750 initialization fail. Sensor not connected or not responded.");
return ESP_ERR_NOT_FOUND;
}
#endif
switch (_init_config.operation_mode)
{
case LOW_RESOLUTION:;
@ -69,8 +85,7 @@ esp_err_t zh_bh1750_read(float *data)
return ESP_ERR_NOT_FOUND;
}
esp_err_t esp_err = ESP_OK;
uint8_t sensor_data_high = 0;
uint8_t sensor_data_low = 0;
uint8_t sensor_data[2] = {0};
if (_init_config.work_mode == CONTINUOUSLY)
{
if (_is_first_start == true)
@ -82,6 +97,7 @@ esp_err_t zh_bh1750_read(float *data)
_is_first_start = true;
}
}
#ifdef CONFIG_IDF_TARGET_ESP8266
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
@ -89,6 +105,9 @@ esp_err_t zh_bh1750_read(float *data)
i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle);
#else
esp_err = i2c_master_transmit(_bh1750_handle, &_command, sizeof(_command), 1000 / portTICK_PERIOD_MS);
#endif
if (esp_err != ESP_OK)
{
ESP_LOGE(TAG, "BH1750 read fail. I2C driver error.");
@ -96,14 +115,18 @@ esp_err_t zh_bh1750_read(float *data)
}
vTaskDelay(((_sensivity / SENSITIVITY_DEFAULT) * _time) / portTICK_PERIOD_MS);
READ:
#ifdef CONFIG_IDF_TARGET_ESP8266
i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_READ, true);
i2c_master_read_byte(i2c_cmd_handle, &sensor_data_high, I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &sensor_data_low, I2C_MASTER_NACK);
i2c_master_read_byte(i2c_cmd_handle, &sensor_data[0], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &sensor_data[1], I2C_MASTER_NACK);
i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle);
#else
esp_err = i2c_master_receive(_bh1750_handle, sensor_data, sizeof(sensor_data), 1000 / portTICK_PERIOD_MS);
#endif
if (esp_err != ESP_OK)
{
ESP_LOGE(TAG, "BH1750 read fail. I2C driver error.");
@ -111,17 +134,17 @@ READ:
}
if (_init_config.operation_mode == HIGH_RESOLUTION_2)
{
*data = (sensor_data_high << 8 | sensor_data_low) * (1 / 1.2 * (69.0 / _sensivity) / 2);
*data = (sensor_data[0] << 8 | sensor_data[1]) * (1 / 1.2 * (69.0 / _sensivity) / 2);
}
else
{
*data = (sensor_data_high << 8 | sensor_data_low) * (1 / 1.2 * (69.0 / _sensivity));
*data = (sensor_data[0] << 8 | sensor_data[1]) * (1 / 1.2 * (69.0 / _sensivity));
}
ESP_LOGI(TAG, "BH1750 read success.");
return ESP_OK;
}
esp_err_t zh_bh1750_adjust(uint8_t value)
esp_err_t zh_bh1750_adjust(const uint8_t value)
{
ESP_LOGI(TAG, "BH1750 adjust begin.");
if ((value < 31 || value > 254))
@ -135,7 +158,7 @@ esp_err_t zh_bh1750_adjust(uint8_t value)
return ESP_ERR_NOT_FOUND;
}
esp_err_t esp_err = ESP_OK;
_sensivity = value;
#ifdef CONFIG_IDF_TARGET_ESP8266
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
@ -155,6 +178,10 @@ esp_err_t zh_bh1750_adjust(uint8_t value)
i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle);
#else
uint8_t sensitivity_data[2] = {value >> 5 | MEASUREMENT_TIME_HIGH_BIT, (value & 0b00011111) | MEASUREMENT_TIME_LOW_BIT};
esp_err = i2c_master_transmit(_bh1750_handle, sensitivity_data, sizeof(sensitivity_data), 1000 / portTICK_PERIOD_MS);
#endif
if (esp_err != ESP_OK)
{
ESP_LOGE(TAG, "BH1750 adjust fail. I2C driver error.");
@ -164,6 +191,7 @@ esp_err_t zh_bh1750_adjust(uint8_t value)
{
_is_first_start = false;
}
_sensivity = value;
ESP_LOGI(TAG, "BH1750 adjust success.");
return ESP_OK;
}