HarmonyOS小熊派 | HarmonyOS传感器驱动开发--E53_IA1读取温度、湿度、光照强度-伙伴云

HarmonyOS小熊派 | HarmonyOS 传感器驱动开发--E53_IA1读取温度、湿度、光照强度

网友投稿 1078 2022-05-30

BearPi-HM_Nano开发板传感器驱动开发——E53_IA1读取温度、湿度、光照强度

本示例将演示如何在BearPi-HM_Nano开发板上使用E53_IA1读取温度、湿度、光照强度，当温度、湿度超标时开启电机通风，当光照强度过低时，开启补光灯补光。

E53_IA1 API分析

本案例主要使用了以下API完成温度、湿度、光照强度读取

1、InitE53IA1()

// 初始化E53_IA1 接口 void InitE53IA1(void);

描述：

初始化E53_IA1

2、ReadDataE53IA1()

// 从E53_IA1 接口读取测量到的温度、湿度及光照强度的数据 void ReadDataE53IA1(void);

描述：读取温度、湿度、光照强度

3、LightStatusSet()

// 设置灯的状态 void LightStatusSet(E53_IA1_Status_ENUM status);

描述：

控制补光灯开关参数：

4、MotorStatusSet()

// 设置电机的状态 void MotorStatusSet(E53_IA1_Status_ENUM status);

描述：

HarmonyOS小熊派 | HarmonyOS传感器驱动开发--E53_IA1读取温度、湿度、光照强度

控制电机开关

参数：

硬件设计

本案例将用到 E53_IA1 智慧农业扩展板与 BearPi-HM_Nano 开发板，其中E53_IA1扩展板接口原理图如下，温湿度传感器sht30和光照强度传感器BH1750都是通过I2C来驱动，电机和补光灯分别通过GPIO_8和GPIO_7来控制。

E53_IA1 智慧农业扩展板与 BearPi-HM_Nano 开发板安装

软件设计

主要代码分析

首先调用 InitE53IA1() 函数初始化E53_IA1所接的引脚的功能，然后循环调用 ReadDataE53IA1() 函数读取温度、湿度、光照强度并通过串口打印出来，当光照强度过低时，开启补光灯补光，当温度、湿度超标时开启电机通风。

yuchuan_e53_ia1.c

#include #include #include #include "ohos_init.h" #include "cmsis_os2.h" #include "e53_ia1.h" #define E53_TASK_CB_SIZE 0U #define E53_TASK_STACK_SIZE 1024 * 4 #define E53_TASK_PRIORITY 24 E53_IA1_Data_TypeDef E53_IA1_Data; /* 处理E53_IA1接口的函数 */ void yuchuanE53IA1Task(void *argument) { (void)argument; //初始化E53_IA1接口 InitE53IA1(); while (1) { /* code */ printf("\r\n====================================================\r\n"); printf("\r\n*************Yuchuan E53_IA1_Task_Example***********\r\n"); printf("\r\n====================================================\r\n"); // 从E53_IA1接口读取数据 ReadDataE53IA1(); printf("\r\n******************************Lux Value is %.2f\r\n", E53_IA1_Data.Lux); printf("\r\n******************************Humidity is %.2f\r\n", E53_IA1_Data.Humidity); printf("\r\n******************************Temperature is %.2f\r\n", E53_IA1_Data.Temperature); if ((int)E53_IA1_Data.Lux < 20) { // 开灯 LightStatusSet(ON); printf("开灯\n"); } else { // 关灯 LightStatusSet(OFF); printf("关灯\n"); } if (((int)E53_IA1_Data.Humidity > 70) | ((int)E53_IA1_Data.Temperature > 35)) { // 开电机 MotorStatusSet(ON); printf("开电机\n"); } else { // 关电机 MotorStatusSet(OFF); printf("关电机\n"); } usleep(2000000); } } static void YuchuanE53IA1Entry(void) { osThreadAttr_t e53TaskAttr; e53TaskAttr.attr_bits = 0U; e53TaskAttr.cb_mem = NULL; e53TaskAttr.cb_size = E53_TASK_CB_SIZE; e53TaskAttr.stack_mem = NULL; e53TaskAttr.stack_size = E53_TASK_STACK_SIZE; e53TaskAttr.priority = E53_TASK_PRIORITY; e53TaskAttr.name = "YuchuanE53IA1Task"; if (osThreadNew((osThreadFunc_t)yuchuanE53IA1Task, NULL, &e53TaskAttr) == NULL) { /* code */ printf("Falied to Create YuchuanE53IA1Task!!!\n"); } } APP_FEATURE_INIT(YuchuanE53IA1Entry);

e53_ia1.h

e53_ia1.c

/* * Copyright (c) 2020 Nanjing Xiaoxiongpai Intelligent Technology Co., Ltd. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include "cmsis_os2.h" #include "e53_ia1.h" #include "iot_gpio.h" #include "iot_gpio_ex.h" #include "iot_errno.h" #include "iot_i2c.h" #include "iot_i2c_ex.h" #define MOTOR_GPIO_8 8 #define FILL_LIGHT_GPIO_7 7 #define IOT_I2C1_SDA_GPIO_0 0 #define IOT_I2C1_SCL_GPIO_1 1 #define IOT_I2C_IDX_1 1 /*************************************************************** * 函数名称: IoInitE53IA1 * 说明: E53_IA1_GPIO初始化 * 参数: 无 * 返回值: 无 ***************************************************************/ static void IoInitE53IA1(void) { IoTGpioInit(MOTOR_GPIO_8); IoTGpioSetDir(MOTOR_GPIO_8, IOT_GPIO_DIR_OUT); IoTGpioSetFunc(MOTOR_GPIO_8, IOT_GPIO_FUNC_GPIO_8_GPIO); IoTGpioInit(FILL_LIGHT_GPIO_7); IoTGpioSetDir(FILL_LIGHT_GPIO_7, IOT_GPIO_DIR_OUT); IoTGpioSetFunc(FILL_LIGHT_GPIO_7, IOT_GPIO_FUNC_GPIO_7_GPIO); IoTGpioInit(IOT_I2C1_SDA_GPIO_0); IoTGpioSetDir(IOT_I2C1_SDA_GPIO_0, IOT_GPIO_DIR_OUT); IoTGpioSetFunc(IOT_I2C1_SDA_GPIO_0, IOT_GPIO_FUNC_GPIO_0_I2C1_SDA); IoTGpioInit(IOT_I2C1_SCL_GPIO_1); IoTGpioSetDir(IOT_I2C1_SCL_GPIO_1, IOT_GPIO_DIR_OUT); IoTGpioSetFunc(IOT_I2C1_SCL_GPIO_1, IOT_GPIO_FUNC_GPIO_1_I2C1_SCL); /* baudrate: 400kbps */ IoTI2cInit(IOT_I2C_IDX_1, 400000); } /*************************************************************** * 函数名称: InitBH1750 * 说明: 写命令初始化BH1750光照强度传感器 * 参数: 无 * 返回值: 无 ***************************************************************/ void InitBH1750(void) { uint8_t send_data[1] = {0x01}; // unsigned int IoTI2cWrite(unsigned int id, unsigned short deviceAddr, const unsigned char *data, unsigned int dataLen); IoTI2cWrite(IOT_I2C_IDX_1, (BH1750_ADDR << 1) | 0x00, send_data, 1); /* uint8_t send_data[1] = {0x01}; IoTI2cWrite(IOT_I2C_IDX_1, (BH1750_Addr << 1) | 0x00, send_data, 1); */ } /*************************************************************** * 函数名称: InitSHT30 * 说明: 初始化SHT30温湿度传感器，设置测量周期 * 参数: 无 * 返回值: 无 ***************************************************************/ void InitSHT30(void) { uint8_t send_data[2] = {0x22, 0x36}; IoTI2cWrite(IOT_I2C_IDX_1, (SHT30_ADDR << 1) | 0x00, send_data, 2); } /*************************************************************** * 函数名称: InitE53IA1 * 说明: 初始化E53_IA1 * 参数: 无 * 返回值: 无 ***************************************************************/ void InitE53IA1(void) { // 初始化E53相关GPIO IoInitE53IA1(); // 初始化BH1750 光照传感器 InitBH1750(); // 初始化SHT30 温湿度传感器 InitSHT30(); } /*************************************************************** * 函数名称: StartBH1750 * 说明: 启动BH1750 采集光照强度的数据 * 参数: 无 * 返回值: 无 ***************************************************************/ void StartBH1750(void) { uint8_t send_data[1] = {0x10}; // unsigned int IoTI2cWrite(unsigned int id, unsigned short deviceAddr, const unsigned char *data, unsigned int dataLen); IoTI2cWrite(IOT_I2C_IDX_1, (BH1750_ADDR << 1) | 0x00, send_data, 1); } /*************************************************************** * 函数名称: CheckCrcSHT3x * 说明: 检查数据正确性 * 参数: data：读取到的数据 nbrOfBytes：需要校验的数量 checksum：读取到的校对比验值 * 返回值: 校验结果，0-成功 1-失败 ***************************************************************/ static uint8_t CheckCrcSHT3x(uint8_t data[], uint8_t nbrOfBytes, uint8_t checksum) { uint8_t crc = 0xFF; uint8_t bit = 0; uint8_t byteCtr; const uint16_t POLYNOMIAL = 0x131; //calculates 8-Bit checksum with given polynomial for (byteCtr = 0; byteCtr < nbrOfBytes; ++byteCtr) { /* code */ crc ^= (data[byteCtr]); for (bit = 8; bit > 0; --bit) { /* code */ if (crc & 0x80) { /* code */ crc = (crc << 1) ^ POLYNOMIAL; } else { crc = (crc << 1); } } } if (crc != checksum) { /* code */ return 1; } else { /* code */ return 0; } } /*************************************************************** * 函数名称: CalcTemperatureCSHT3x * 说明: 温度计算 * 参数: u16sT：读取到的温度原始数据 * 返回值: 计算后的温度数据 ***************************************************************/ static float CalcTemperatureCSHT3x(uint16_t u16sT) { // variable for result float temperatureC = 0; // clear bits [1..0] (status bits) u16sT &= ~0x0003; //-- calculate temperature [℃] -- //T = -45 + 175 * rawValue / (2^16-1) temperatureC = (175 * (float)u16sT / 65535 - 45); return temperatureC; } /*************************************************************** * 函数名称: CalcRHSHT3x * 说明: 湿度计算 * 参数: u16sRH：读取到的湿度原始数据 * 返回值: 计算后的湿度数据 ***************************************************************/ static float CalcRHSHT3x(uint16_t u16sRH) { // variable for result float humidityRH = 0; // clear bits [1..0] (status bits) u16sRH &= ~0x0003; //-- calculate relative humidity [%RH] -- // RH = rawValue / (2^16-1) * 10 humidityRH = (100 * (float)u16sRH / 65535); return humidityRH; } /*************************************************************** * 函数名称: ReadDataE53IA1 * 说明: 测量光照强度、温度、湿度 * 参数: 无 * 返回值: 无 ***************************************************************/ void ReadDataE53IA1(void) { uint8_t recv_data[2] = {0}; // 启动光照传感器采集光照强度的数据 StartBH1750(); //延时1s usleep(1000000); // 读取光照强度传感器的数据 // unsigned int IoTI2cRead(unsigned int id, unsigned short deviceAddr, unsigned char *data, unsigned int dataLen); IoTI2cRead(IOT_I2C_IDX_1, (BH1750_ADDR << 1) | 0x01, recv_data, 2); // 光照强度 E53_IA1_Data.Lux = (float)(((recv_data[0] << 8) + recv_data[1]) / 1.2); //data array for checksum verification uint8_t data[3]; uint16_t dat, temp; //byte 0,1 is temperature byte 4,5 is humidity uint8_t SHT3X_Data_Buffer[6]; IotI2cData sht30_i2c_data = {0}; uint8_t send_data[2] = {0xE0, 0x00}; sht30_i2c_data.sendBuf = send_data; sht30_i2c_data.sendLen = 2; sht30_i2c_data.receiveBuf = SHT3X_Data_Buffer; sht30_i2c_data.receiveLen = 6; //Read bh1750 sensor data // unsigned int IoTI2cWriteread(unsigned int id, unsigned short deviceAddr, const IotI2cData *i2cData); IoTI2cWriteread(IOT_I2C_IDX_1, (SHT30_ADDR << 1) | 0x00, &sht30_i2c_data); // /* check tem */ data[0] = SHT3X_Data_Buffer[0]; data[1] = SHT3X_Data_Buffer[1]; data[2] = SHT3X_Data_Buffer[2]; temp = CheckCrcSHT3x(data, 2, data[2]); if (!temp) { /* code */ dat = ((uint16_t)data[0] << 8) | data[1]; // 温度 E53_IA1_Data.Temperature = CalcTemperatureCSHT3x(dat); } // /* check humidity 检查湿度*/ data[0] = SHT3X_Data_Buffer[3]; data[1] = SHT3X_Data_Buffer[4]; data[2] = SHT3X_Data_Buffer[5]; temp = CheckCrcSHT3x(data, 2, data[2]); /* value is ture */ if (!temp) { /* code */ dat = ((uint16_t)data[0] << 8) | data[1]; E53_IA1_Data.Humidity = CalcRHSHT3x(dat); } } /*************************************************************** * 函数名称: LightStatusSet * 说明: 灯状态设置 * 参数: status,ENUM枚举的数据 * OFF,关 * ON,开 * 返回值: 无 ***************************************************************/ void LightStatusSet(E53_IA1_Status_ENUM status) { if (status == ON) { // 设置GPIO_14 为高电平点亮灯 IoTGpioSetOutputVal(FILL_LIGHT_GPIO_7, IOT_GPIO_VALUE1); } if (status == OFF) { // 设置GPIO_14 为低电平熄灭灯 IoTGpioSetOutputVal(FILL_LIGHT_GPIO_7, IOT_GPIO_VALUE0); } } /*************************************************************** * 函数名称: MotorStatusSet * 说明: 电机状态设置 * 参数: status,ENUM枚举的数据 * OFF,关 * ON,开 * 返回值: 无 ***************************************************************/ void MotorStatusSet(E53_IA1_Status_ENUM status) { if (status == ON) { // 设置GPIO_8 为高电平输出打开电机 IoTGpioSetOutputVal(MOTOR_GPIO_8, IOT_GPIO_VALUE1); } if (status == OFF) { // 设置GPIO_8 为低电平输出关闭电机 IoTGpioSetOutputVal(MOTOR_GPIO_8, IOT_GPIO_VALUE0); } }

编译调试

//applications/sample/BearPi/BearPi-HM_Nano/sample/C2_YuchuanE53IA1

static_library("yuchuanE53IA1"){ sources = [ "scr/e53_ia1.c", "yuchuan_e53_ia1.c", ] include_dirs = [ "//utils/native/lite/include", "//kernel/liteos_m/kal/cmsis", "//base/iot_hardware/peripheral/interfaces/kits", "include", ] }

修改 BUILD.gn 文件

修改applications\BearPi\BearPi-HM_Nano\sample路径下 BUILD.gn 文件，指定 yuchuanE53IA1 参与编译。

# Copyright (c) 2020 Nanjing Xiaoxiongpai Intelligent Technology Co., Ltd. # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import("//build/lite/config/component/lite_component.gni") lite_component("sample") { features = [ #"A1_kernal_thread:thread_example", #"A2_kernel_timer:timer_example", #"A3_kernel_event:event_example", #"A4_kernel_mutex:mutex_example", #"A5_kernel_semaphore:semaphore_example", #"A6_kernel_message:message_example", #"B1_basic_led_blink:led_example", #"B2_basic_button:button_example", #"B3_basic_pwm_led:pwm_example", #"B4_basic_adc:adc_example", #"B5_basic_i2c_nfc:i2c_example", #"B6_basic_uart:uart_example", #"C1_e53_sf1_mq2:e53_sf1_example", #"C2_e53_ia1_temp_humi_pls:e53_ia1_example", #"C3_e53_sc1_pls:e53_sc1_example", #"C4_e53_sc2_axis:e53_sc2_example", #"C5_e53_is1_infrared:e53_is1_example", #"D1_iot_wifi_ap:wifi_ap", #"D2_iot_wifi_sta_connect:wifi_sta_connect", #"D3_iot_udp_client:udp_client", #"D4_iot_tcp_server:tcp_server", #"D5_iot_mqtt:iot_mqtt", #"D6_iot_cloud_oc:oc_mqtt", #"D7_iot_cloud_onenet:onenet_mqtt", #"D8_iot_cloud_oc_smoke:cloud_oc_smoke", #"D9_iot_cloud_oc_light:cloud_oc_light", #"D10_iot_cloud_oc_manhole_cover:cloud_oc_manhole_cover", #"D11_iot_cloud_oc_infrared:cloud_oc_infrared", #"D12_iot_cloud_oc_agriculture:cloud_oc_agriculture", #"D13_iot_cloud_oc_gps:cloud_oc_gps", #"B1_YuchuanBasicLEDBlink:yuchuanLED", #"B2_YuchuanBasicButton:yuchuanButton", #"C1_YuchuanE53_SF1_MQ2:YuchuanE53SF1Mq2", "C2_YuchuanE53IA1:yuchuanE53IA1", ] }

运行结果

示例代码编译烧录代码后，按下开发板的RESET按键，通过串口助手查看日志，会打印温湿度及光照强度信息。用手遮住扩展板，补光灯会自动开启，控制温度或者湿度超标，电机会自动开启。

ready to OS start sdk ver:Hi3861V100R001C00SPC025 2020-09-03 18:10:00 FileSystem mount ok. wifi init success! hiview init success.00 00:00:00 0 196 D 0/HIVIEW: log limit init success. 00 00:00:00 0 196 I 1/SAMGR: Bootstrap core services(count:3). 00 00:00:00 0 196 I 1/SAMGR: Init servi ==================================================== *************Yuchuan E53_IA1_Task_Example*********** ==================================================== ce:0x4b0ea8 TaskPool:0xe4b7c 00 00:00:00 0 196 I 1/SAMGR: Init service:0x4b0eb4 TaskPool:0xe4b9c 00 00:00:00 0 196 I 1/SAMGR: Init service:0x4b1380 TaskPool:0xe4bbc 00 00:00:00 0 228 I 1/SAMGR: Init service 0x4b0eb4 success! 00 00:00:00 0 128 I 1/SAMGR: Init service 0x4b0ea8 success! 00 00:00:00 0 72 I 1/SAMGR: Init service 0x4b1380 success! 00 00:00:00 0 72 I 1/SAMGR: Initialized all core system services! 00 00:00:00 0 128 I 1/SAMGR: Bootstrap system and application services(count:0). 00 00:00:00 0 128 I 1/SAMGR: Initialized all system and application services! 00 00:00:00 0 128 I 1/SAMGR: Bootstrap dynamic registered services(count:0). ******************************Lux Value is 330.83 ******************************Humidity is 0.00 ******************************Temperature is 0.00 关灯关电机 ==================================================== *************Yuchuan E53_IA1_Task_Example*********** ==================================================== ******************************Lux Value is 329.17 ******************************Humidity is 0.00 ******************************Temperature is 0.00 关灯关电机

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友情链接

HarmonyOS小熊派 | HarmonyOS传感器驱动开发--E53_IA1读取温度 、湿度、光照强度

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友情链接

HarmonyOS小熊派 | HarmonyOS 传感器驱动开发--E53_IA1读取温度、湿度、光照强度