逆向学习物联网-感知层设计-08Main程序设计

1.0业务框图

1.1 将驱动程序添加到工程中

1）添加文件到工程

2）添加工程文件编译路径

1.2 中断服务程序设计：接收数据

2 typedef struct

3 {

4 unsigned char rCh;//接受一个字节

5 unsigned int rNum;//接受字节个数

6 unsigned char buffer[200];

8 } COM_DATA;

10 COM_DATA gg_ComData;

13 void Com_Init ( void )

14 {

15 UART_Start_Receive_IT ( &huart2, &gg_ComData.rCh, 1 );

17 }

19 unsigned char Com_CheckRecvOk ( unsigned char *recvBuffer, unsigned int *recvNum )

20 {

21 static unsigned int old_num = 0;

23 if ( gg_ComData.rNum == old_num && gg_ComData.rNum > 0 )

24 {

25 memcpy ( recvBuffer, gg_ComData.buffer, old_num );

26 *recvNum = old_num;

27 old_num = 0;

28 gg_ComData.rNum = 0;

29 return 0; //接收完成

30 }

31 old_num = gg_ComData.rNum;

32 return 1; //还在接收

33 }

36 void HAL_UART_RxCpltCallback ( UART_HandleTypeDef *huart )

37 {

38 if ( gg_ComData.rNum < 200 )

39 {

40 gg_ComData.buffer[gg_ComData.rNum] = gg_ComData.rCh;

41 gg_ComData.rNum++;

42 }

43 UART_Start_Receive_IT ( &huart2, &gg_ComData.rCh, 1 );

44 }

44.1 编写系统main（）函数，实现系统功能

1) 系统初始化

void User_Init ( void )

{

printf ( "user init start---" );

HAL_TIM_Base_Start ( &htim2 );

Com_Init();//接收数据初始化

Lamp_Set ( 0 ); //灯灭

DHT11_Init();//试读第1个数据

OLED_Init();//显示屏幕初始化

OLED_ShowString ( 0, 0, ( u8 * ) "-Reverse_IOT-", 16 );

printf ( "user init end---" );

}

2) 定时1秒，采集状态，显示

//4-----------------------------------

//刷新OLED显示,1秒刷新显示1次

if ( tDisp++ > 1000 )

{

tDisp = 0;

ReadStatus();

Oled_Refresh();

}

u8 g_Temperature = 0;

u8 g_Humidity = 0;

u8 g_Lamp = 0;

void ReadStatus ( void )

{

g_Lamp = Lamp_Get();

if ( DHT11_Read_Data ( &g_Temperature, &g_Humidity ) )

{

return;

}

void Oled_Refresh ( void )

{

char strTemp1[16] = "-SYSTEM MONITOR-";

char strTemp2[16] = {0};

char strTemp3[16] = {0};

char strTemp4[16] = {0};

//OLED_Clear();

sprintf ( strTemp2, "Temp:%d ", g_Temperature );

sprintf ( strTemp3, "Humi:%d ", g_Humidity );

sprintf ( strTemp4, "Lamp:%d ", g_Lamp );

OLED_ShowString ( 0, 0, ( u8 * ) strTemp1, 16 );

OLED_ShowString ( 0, 2, ( u8 * ) strTemp2, 16 );

OLED_ShowString ( 0, 4, ( u8 * ) strTemp3, 16 );

OLED_ShowString ( 0, 6, ( u8 * ) strTemp4, 16 );

}

3) 定时3秒上传：温度，湿度，LAMP状态。

if ( tComm++ > 3000 )

{

tComm = 0;

SendStatusData();

}

//上传状态数据

void SendStatusData ( void )

{

char strData[100];

sprintf ( strData, ( char * ) "{\"temperature\":%d,\"humidity\":%d,\"lamp\":%d}", ( int ) g_Temperature, ( int ) g_Humidity, ( int ) g_Lamp );

HAL_UART_Transmit ( &huart2, ( uint8_t * ) strData, strlen ( strData ), 0xFFFF );

}

4) 接收远程控制LAMP,

//2-----------------------------------------

//接收用户发来的命令

if ( Com_CheckRecvOk ( recvBuffer, &recvNum ) == 0 )

{

ExeCommand ( );

SendStatusData();//立即响应

tComm = 0;

}

void ExeCommand ( void )

{

//接收数据进行处理

cJSON *root = NULL;

cJSON *item = NULL; //cjson??

root = cJSON_Parse ( ( char * ) recvBuffer );

if ( !root )

{

//出错

}

else //成功

{

char strDev[30] = {0};

char strCmd[30] = {0};

//灯控判断cJSON_GetObjectItem

item = cJSON_GetObjectItem ( root, "dev" );

strcpy ( strDev, item->valuestring );

item = cJSON_GetObjectItem ( root, "cmd" );

strcpy ( strCmd, item->valuestring );

cJSON_Delete ( root );//释放内存

if ( memcmp ( strDev, "LED1", 4 ) == 0 )

{

if ( memcmp ( strCmd, "ON", 2 ) == 0 )

{

Lamp_Set ( 1 ); //开灯

}

if ( memcmp ( strCmd, "OFF", 3 ) == 0 )

{

Lamp_Set ( 0 ); //关灯

}

if ( memcmp ( strDev, "LED0", 4 ) == 0 )

{