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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29
README.md
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@ -32,32 +32,41 @@ Reading the sensor:
void app_main(void)
{
esp_log_level_set("zh_bh1750", ESP_LOG_NONE);
#ifdef CONFIG_IDF_TARGET_ESP8266
i2c_config_t i2c_config = {
.mode = I2C_MODE_MASTER,
.sda_io_num = GPIO_NUM_21, // In accordance with used chip.
.sda_io_num = GPIO_NUM_4, // In accordance with used chip.
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_io_num = GPIO_NUM_22, // In accordance with used chip.
.scl_io_num = GPIO_NUM_5, // In accordance with used chip.
.scl_pullup_en = GPIO_PULLUP_ENABLE,
#ifndef CONFIG_IDF_TARGET_ESP8266
.master.clk_speed = 100000,
#endif
};
#ifdef CONFIG_IDF_TARGET_ESP8266
i2c_param_config(I2C_PORT, &i2c_config);
i2c_driver_install(I2C_PORT, i2c_config.mode);
#else
i2c_param_config(I2C_PORT, &i2c_config);
i2c_driver_install(I2C_PORT, i2c_config.mode, 0, 0, 0);
#else
i2c_master_bus_config_t i2c_bus_config = {
.clk_source = I2C_CLK_SRC_DEFAULT,
.i2c_port = I2C_PORT,
.scl_io_num = GPIO_NUM_22, // In accordance with used chip.
.sda_io_num = GPIO_NUM_21, // In accordance with used chip.
.glitch_ignore_cnt = 7,
.flags.enable_internal_pullup = true,
};
i2c_master_bus_handle_t i2c_bus_handle;
i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
#endif
zh_bh1750_init_config_t zh_bh1750_init_config = ZH_BH1750_INIT_CONFIG_DEFAULT();
#ifdef CONFIG_IDF_TARGET_ESP8266
zh_bh1750_init_config.i2c_port = I2C_PORT;
#else
zh_bh1750_init_config.i2c_handle = i2c_bus_handle;
#endif
zh_bh1750_init(&zh_bh1750_init_config);
zh_bh1750_adjust(69); // Just for an example of how to change the sensor sensitivity.
float lux = 0.0;
for (;;)
{
zh_bh1750_read(&lux);
printf("Lux %0.2f\n", lux);
printf("Lux %d\n", (uint32_t)lux);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}

15
include/zh_bh1750.h
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@ -2,11 +2,13 @@
#include "esp_err.h"
#include "esp_log.h"
#include "driver/i2c.h"
#ifdef CONFIG_IDF_TARGET_ESP8266
#include "driver/i2c.h"
#else
#include "driver/i2c_master.h"
#endif
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#endif
/**
* @brief Default values for zh_bh1750_init_config_t structure for initial initialization of the sensor.
@ -51,6 +53,10 @@ extern "C"
ONE_TIME // One time measurement. Sensor is power down after measurement.
} work_mode;
bool i2c_port; // I2C port.
#ifndef CONFIG_IDF_TARGET_ESP8266
i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle.
#endif
} zh_bh1750_init_config_t;
/**
@ -67,8 +73,9 @@ extern "C"
* @return
* - ESP_OK if initialization was success
* - ESP_ERR_INVALID_ARG if parameter error
* - ESP_ERR_NOT_FOUND if sensor not connected or not responded
*/
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);
/**
* @brief Read BH1750 sensor.
@ -100,7 +107,7 @@ extern "C"
* - 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_t zh_bh1750_adjust(uint8_t value);
esp_err_t zh_bh1750_adjust(const uint8_t value);
#ifdef __cplusplus
}

2
version.txt
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@ -1 +1 @@
1.0.0
1.0.1

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;
}