alexey.zholtikov/zh_bh1750
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Alexey Zholtikov
2024-07-03 10:31:03 +03:00
parent 4a216e773b
commit 618b4f4b4d
4 changed files with 31 additions and 19 deletions
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3
README.md
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@ -60,6 +60,7 @@ void app_main(void)
i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle); i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
#endif #endif
zh_bh1750_init_config_t bh1750_init_config = ZH_BH1750_INIT_CONFIG_DEFAULT(); zh_bh1750_init_config_t bh1750_init_config = ZH_BH1750_INIT_CONFIG_DEFAULT();
bh1750_init_config.auto_adjust = true; // Just for an example of how to enable auto adjustment the sensor sensitivity.
#ifdef CONFIG_IDF_TARGET_ESP8266 #ifdef CONFIG_IDF_TARGET_ESP8266
bh1750_init_config.i2c_port = I2C_PORT; bh1750_init_config.i2c_port = I2C_PORT;
#else #else
@ -72,7 +73,7 @@ void app_main(void)
{ {
zh_bh1750_read(&lux); zh_bh1750_read(&lux);
printf("Lux %0.2f\n", lux); printf("Lux %0.2f\n", lux);
vTaskDelay(1000 / portTICK_PERIOD_MS); vTaskDelay(5000 / portTICK_PERIOD_MS);
} }
} }
``` ```

4
include/zh_bh1750.h
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@ -86,6 +86,8 @@ extern "C"
/** /**
* @brief Adjust BH1750 sensor sensitivity. * @brief Adjust BH1750 sensor sensitivity.
* *
* @attention Can only be used if the automatic adjustment is not switched on.
*
* @param[in] value Value of sensitivity. * @param[in] value Value of sensitivity.
* *
* @note Range value from 31 to 254. 69 by default. Can be changed continuously during program work. * @note Range value from 31 to 254. 69 by default. Can be changed continuously during program work.
@ -93,7 +95,7 @@ extern "C"
* @return * @return
* - ESP_OK if adjust was success * - ESP_OK if adjust was success
* - ESP_ERR_INVALID_ARG if parameter error * - ESP_ERR_INVALID_ARG if parameter error
* - ESP_ERR_NOT_FOUND if BH1750 is not initialized * - ESP_ERR_NOT_FOUND if BH1750 is not initialized or auto adjust is enabled
* - ESP_FAIL if sending command error or slave has not ACK the transfer * - ESP_FAIL if sending command error or slave has not ACK the transfer
* - ESP_ERR_INVALID_STATE if I2C driver not installed or not in master mode * - ESP_ERR_INVALID_STATE if I2C driver not installed or not in master mode
* - ESP_ERR_TIMEOUT if operation timeout because the bus is busy * - ESP_ERR_TIMEOUT if operation timeout because the bus is busy

2
version.txt
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@ -1 +1 @@
1.0.1 1.0.2

41
zh_bh1750.c
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@ -1,7 +1,7 @@
#include "zh_bh1750.h" #include "zh_bh1750.h"
#define LOW_RESOLUTION_MEASUREMENT_TIME 24 // L-Resolution mode measurement time max value. #define LOW_RESOLUTION_MEASUREMENT_TIME 24 // L-Resolution mode measurement time.
#define HIGH_RESOLUTION_MEASUREMENT_TIME 180 // H-Resolution mode measurement time max value. #define HIGH_RESOLUTION_MEASUREMENT_TIME 180 // H-Resolution mode measurement time.
#define SENSITIVITY_DEFAULT 69 #define SENSITIVITY_DEFAULT 69
@ -25,6 +25,8 @@ static bool _is_initialized = false;
static i2c_master_dev_handle_t _bh1750_handle = {0}; static i2c_master_dev_handle_t _bh1750_handle = {0};
#endif #endif
esp_err_t _adjust(const uint8_t value);
static const char *TAG = "zh_bh1750"; static const char *TAG = "zh_bh1750";
esp_err_t zh_bh1750_init(const zh_bh1750_init_config_t *config) esp_err_t zh_bh1750_init(const zh_bh1750_init_config_t *config)
@ -114,7 +116,7 @@ REPEATE:
ESP_LOGE(TAG, "BH1750 read fail. I2C driver error."); ESP_LOGE(TAG, "BH1750 read fail. I2C driver error.");
return esp_err; return esp_err;
} }
vTaskDelay(((_sensivity / SENSITIVITY_DEFAULT) * _time) / portTICK_PERIOD_MS); vTaskDelay(_time / portTICK_PERIOD_MS);
READ: READ:
#ifdef CONFIG_IDF_TARGET_ESP8266 #ifdef CONFIG_IDF_TARGET_ESP8266
i2c_cmd_handle = i2c_cmd_link_create(); i2c_cmd_handle = i2c_cmd_link_create();
@ -134,27 +136,23 @@ READ:
return esp_err; return esp_err;
} }
uint32_t raw_data = sensor_data[0] << 8 | sensor_data[1]; uint32_t raw_data = sensor_data[0] << 8 | sensor_data[1];
if (raw_data == 65536 || raw_data == 0) if (raw_data == 65535 || raw_data == 0)
{ {
ESP_LOGW(TAG, "BH1750 read error. Sensitivity adjustment required. Current sensivity level %d", _sensivity); ESP_LOGW(TAG, "BH1750 read error. Sensitivity adjustment required. Current sensivity level %d.", _sensivity);
} }
if (_init_config.auto_adjust == true) if (_init_config.auto_adjust == true)
{ {
printf("RAW data %ld\n", raw_data);
printf("Sensivity %d\n", _sensivity);
if (raw_data == 65535 && _sensivity > 31) if (raw_data == 65535 && _sensivity > 31)
{ {
if (zh_bh1750_adjust(_sensivity - 1) == ESP_OK) if (_adjust(_sensivity - 1) == ESP_OK)
{ {
--_sensivity;
goto REPEATE; goto REPEATE;
} }
} }
if (raw_data == 1 && _sensivity < 254) if (raw_data == 0 && _sensivity < 254)
{ {
if (zh_bh1750_adjust(_sensivity + 1) == ESP_OK) if (_adjust(_sensivity + 1) == ESP_OK)
{ {
++_sensivity;
goto REPEATE; goto REPEATE;
} }
} }
@ -172,6 +170,16 @@ READ:
} }
esp_err_t zh_bh1750_adjust(const uint8_t value) esp_err_t zh_bh1750_adjust(const uint8_t value)
{
if (_init_config.auto_adjust == true)
{
ESP_LOGE(TAG, "BH1750 adjust fail. Auto adjust is enabled.");
return ESP_ERR_NOT_FOUND;
}
return _adjust(value);
}
esp_err_t _adjust(const uint8_t value)
{ {
ESP_LOGI(TAG, "BH1750 adjust begin."); ESP_LOGI(TAG, "BH1750 adjust begin.");
if ((value < 31 || value > 254)) if ((value < 31 || value > 254))
@ -185,11 +193,12 @@ esp_err_t zh_bh1750_adjust(const uint8_t value)
return ESP_ERR_NOT_FOUND; return ESP_ERR_NOT_FOUND;
} }
esp_err_t esp_err = ESP_OK; esp_err_t esp_err = ESP_OK;
uint8_t sensitivity_data[2] = {value >> 5 | MEASUREMENT_TIME_HIGH_BIT, (value & 0b00011111) | MEASUREMENT_TIME_LOW_BIT};
#ifdef CONFIG_IDF_TARGET_ESP8266 #ifdef CONFIG_IDF_TARGET_ESP8266
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create(); i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle); i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true); i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
i2c_master_write_byte(i2c_cmd_handle, value >> 5 | MEASUREMENT_TIME_HIGH_BIT, true); i2c_master_write_byte(i2c_cmd_handle, &sensitivity_data[0], true);
i2c_master_stop(i2c_cmd_handle); i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS); esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle); i2c_cmd_link_delete(i2c_cmd_handle);
@ -201,13 +210,13 @@ esp_err_t zh_bh1750_adjust(const uint8_t value)
i2c_cmd_handle = i2c_cmd_link_create(); i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle); i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true); i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
i2c_master_write_byte(i2c_cmd_handle, (value & 0b00011111) | MEASUREMENT_TIME_LOW_BIT, true); i2c_master_write_byte(i2c_cmd_handle, &sensitivity_data[1], true);
i2c_master_stop(i2c_cmd_handle); i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS); esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle); i2c_cmd_link_delete(i2c_cmd_handle);
#else #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[0], 1, 1000 / portTICK_PERIOD_MS);
esp_err = i2c_master_transmit(_bh1750_handle, sensitivity_data, sizeof(sensitivity_data), 1000 / portTICK_PERIOD_MS); esp_err = i2c_master_transmit(_bh1750_handle, &sensitivity_data[1], 1, 1000 / portTICK_PERIOD_MS);
#endif #endif
if (esp_err != ESP_OK) if (esp_err != ESP_OK)
{ {