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完成对光照和温湿度的采集，显示到LCD上，并存放在变量

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Wang Beihong
2026-04-21 00:12:16 +08:00
parent fc906db35f
commit 08acf1b58b
6 changed files with 151 additions and 148 deletions
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124
components/bh1750/bh1750_use.c
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@@ -8,124 +8,50 @@
static const char *TAG = "BH1750_USE";
#define BH1750_READ_RETRY_COUNT 3
#define BH1750_MEASURE_DELAY_MS 200
#define BH1750_RETRY_INTERVAL_MS 30
static i2c_master_bus_handle_t s_i2c_bus_handle = NULL;
static bh1750_handle_t s_bh1750_handle = NULL;
/**
* @brief 初始化 BH1750 传感器及其所需的 I2C 总线
*/
i2c_master_bus_handle_t bh1750_get_i2c_bus_handle(void)
{
return s_i2c_bus_handle;
}
esp_err_t bh1750_user_init(void)
{
// 1. 配置并初始化 I2C 总线 (Master Bus)
i2c_master_bus_config_t bus_config = {
.clk_source = I2C_CLK_SRC_DEFAULT,
.i2c_port = I2C_NUM_0,
.scl_io_num = BH1750_I2C_SCL_IO,
.sda_io_num = BH1750_I2C_SDA_IO,
.glitch_ignore_cnt = 7,
};
esp_err_t ret = i2c_new_master_bus(&bus_config, &s_i2c_bus_handle);
if (s_i2c_bus_handle == NULL) {
i2c_master_bus_config_t bus_config = {
.clk_source = I2C_CLK_SRC_DEFAULT,
.i2c_port = I2C_NUM_0,
.scl_io_num = (gpio_num_t)BH1750_I2C_SCL_IO,
.sda_io_num = (gpio_num_t)BH1750_I2C_SDA_IO,
.glitch_ignore_cnt = 7,
};
ESP_ERROR_CHECK(i2c_new_master_bus(&bus_config, &s_i2c_bus_handle));
}
esp_err_t ret = bh1750_create(s_i2c_bus_handle, BH1750_I2C_ADDRESS_DEFAULT, &s_bh1750_handle);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "I2C 总线初始化失败: %s", esp_err_to_name(ret));
ESP_LOGE(TAG, "BH1750 设备创建失败");
return ret;
}
// 2. 创建 BH1750 设备句柄 (使用驱动默认地址 0x23)
ret = bh1750_create(s_i2c_bus_handle, BH1750_I2C_ADDRESS_DEFAULT, &s_bh1750_handle);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "BH1750 设备创建失败: %s", esp_err_to_name(ret));
if (s_i2c_bus_handle) {
i2c_del_master_bus(s_i2c_bus_handle);
s_i2c_bus_handle = NULL;
}
return ret;
}
// 3. 初始上电
ret = bh1750_power_on(s_bh1750_handle);
if (ret == ESP_OK) {
ESP_LOGI(TAG, "BH1750 初始化成功");
}
return ret;
return bh1750_power_on(s_bh1750_handle);
}
/**
* @brief 读取一次光照强度数据 (Lux)
*/
esp_err_t bh1750_user_read(float *lux)
{
if (lux == NULL) {
return ESP_ERR_INVALID_ARG;
}
if (s_bh1750_handle == NULL) {
return ESP_ERR_INVALID_STATE;
}
esp_err_t ret = ESP_FAIL;
for (int attempt = 1; attempt <= BH1750_READ_RETRY_COUNT; ++attempt) {
// 单次模式每次读取前都先上电，避免传感器处于掉电状态导致返回 0
ret = bh1750_power_on(s_bh1750_handle);
if (ret != ESP_OK) {
ESP_LOGW(TAG, "上电失败(第%d次): %s", attempt, esp_err_to_name(ret));
vTaskDelay(pdMS_TO_TICKS(BH1750_RETRY_INTERVAL_MS));
continue;
}
// 设置测量模式：单次高分辨率模式 (1lx)
ret = bh1750_set_measure_mode(s_bh1750_handle, BH1750_ONETIME_1LX_RES);
if (ret != ESP_OK) {
ESP_LOGW(TAG, "设置测量模式失败(第%d次): %s", attempt, esp_err_to_name(ret));
vTaskDelay(pdMS_TO_TICKS(BH1750_RETRY_INTERVAL_MS));
continue;
}
// 根据数据手册，单次高分辨率模式需要约 120ms-180ms 测量时间
vTaskDelay(pdMS_TO_TICKS(BH1750_MEASURE_DELAY_MS));
ret = bh1750_get_data(s_bh1750_handle, lux);
if (ret != ESP_OK) {
ESP_LOGW(TAG, "数据读取失败(第%d次): %s", attempt, esp_err_to_name(ret));
vTaskDelay(pdMS_TO_TICKS(BH1750_RETRY_INTERVAL_MS));
continue;
}
// 在强光/室内环境下长期 0 Lux 通常不合理，重试一次可规避偶发总线抖动
if (*lux <= 0.0f && attempt < BH1750_READ_RETRY_COUNT) {
ESP_LOGW(TAG, "读取到 0 Lux，准备重试(第%d次)", attempt);
vTaskDelay(pdMS_TO_TICKS(BH1750_RETRY_INTERVAL_MS));
continue;
}
return ESP_OK;
}
if (ret == ESP_OK && *lux <= 0.0f) {
ESP_LOGW(TAG, "连续读取均为 0 Lux，请优先检查 I2C 上拉电阻和传感器供电");
return ESP_OK;
}
return ret;
if (s_bh1750_handle == NULL) return ESP_ERR_INVALID_STATE;
bh1750_power_on(s_bh1750_handle);
bh1750_set_measure_mode(s_bh1750_handle, BH1750_ONETIME_1LX_RES);
vTaskDelay(pdMS_TO_TICKS(180));
return bh1750_get_data(s_bh1750_handle, lux);
}
/**
* @brief 释放 BH1750 相关资源
*/
void bh1750_user_deinit(void)
{
if (s_bh1750_handle) {
bh1750_delete(s_bh1750_handle);
s_bh1750_handle = NULL;
}
if (s_i2c_bus_handle) {
i2c_del_master_bus(s_i2c_bus_handle);
s_i2c_bus_handle = NULL;
}
ESP_LOGI(TAG, "资源已释放");
}

19
components/bh1750/include/bh1750_use.h
View File

@@ -2,27 +2,28 @@
#define BH1750_USE_H
#include "esp_err.h"
#include "driver/i2c_master.h"
#ifdef __cplusplus
extern "C" {
#endif
// 定义使用的 I2C 引脚（根据你的硬件实际连接修改）
#define BH1750_I2C_SCL_IO 1 // ESP32-S3 建议引脚
#define BH1750_I2C_SDA_IO 2 // ESP32-S3 建议引脚
// 定义使用的 I2C 引脚
#define BH1750_I2C_SCL_IO 1
#define BH1750_I2C_SDA_IO 2
/**
* @brief 初始化 BH1750 传感器及其所需的 I2C 总线
*
* @return esp_err_t 成功返回 ESP_OK
*/
esp_err_t bh1750_user_init(void);
/**
* @brief 获取 I2C 总线句柄，以便其他传感器（如 AHT30）共用总线
*/
i2c_master_bus_handle_t bh1750_get_i2c_bus_handle(void);
/**
* @brief 读取一次光照强度数据 (Lux)
*
* @param lux [out] 存储结果的指针
* @return esp_err_t 成功返回 ESP_OK
*/
esp_err_t bh1750_user_read(float *lux);
@@ -35,4 +36,4 @@ void bh1750_user_deinit(void);
}
#endif
#endif // BH1750_USE_H
#endif