139 lines
4.4 KiB
C
139 lines
4.4 KiB
C
/**
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* @file main.c
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* @author Myth
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* @version 1.0
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* @date 2021.10.17
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* @brief 工程主函数文件
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* @details 初始化及主循环
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* @note 此版本实现功能：
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*
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* 网关通过 LoRa 模块轮流向节点请求数据，节点（本机）将数据返回给主节点
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*
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* JTAG 已禁用，请使用 SWD 调试
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*/
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#include "sys.h"
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#include "systick.h"
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#include "uart.h"
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#include "led.h"
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#include "lora.h"
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#include "aht20.h"
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#include "bh1750.h"
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#define NODE_SEQ_NUM '2' //节点标号：2 ~ 5
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typedef struct
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{
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uint8_t seq;
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float humi;
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float temp;
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float light;
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uint8_t end;
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} DataPack; //数据包定义，由于平台相同，网关和节点通讯无需考虑对齐问题
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int main(void)
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{
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if (HAL_Init() != HAL_OK) //初始化 HAL 库
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{
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Error_Handler(__FILE__, __LINE__); //错误处理
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}
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SystemClock_Config(); //初始化系统时钟为 72MHz
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DisableJTAG(); //禁用 JTAG
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SysTick_Init(); //初始化 SysTick 和软件定时器
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UART_Init(); //初始化串口
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LED_Init(); //初始化 LED
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LoRa_Init(); //初始化 LoRa 模块
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AHT20_Init(); //初始化 AHT20
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BH1750_Init(); //初始化 BH1750
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DataPack pack; //发送的数据包
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pack.seq = NODE_SEQ_NUM; //数据包序号，标明发送节点
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pack.end = '@'; //数据包结束字节，用于网关校验
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uint8_t buffer[3]; //接收缓冲区
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uint8_t size; //接收到的包大小
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int32_t time; //当前时间，控制时序
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//首先获取一次数据，防止发送空数据
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AHT20_Start(); // AHT20 开始测量
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BH1750_Start(); // BH1750 开始测量
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Delay_ms(80);
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AHT20_Read(&(pack.humi), &(pack.temp));
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Delay_ms(100);
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pack.light = BH1750_Read();
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while (1)
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{
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//程序主循环
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AHT20_Start(); // AHT20 开始测量
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BH1750_Start(); // BH1750 开始测量
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//在等待测量的过程中检测是否有命令包索取数据
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//说明：
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//下面一段代码显然应该封装为函数。但在封装为函数后出现恶性 Bug，猜测为溢出导致，正在排除
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//即使不封装为函数，将 buffer size 声明为全局变量也会导致此 Bug，表现为接收后死机
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time = SysTick_GetRunTime();
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while (SysTick_CheckRunTime(time) < 80) //等待 80 ms
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{
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size = LoRa_Receive(buffer); //接收
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if (size < 1)
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{
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continue;
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}
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else if (size != 3 || buffer[0] != '#' || buffer[1] != NODE_SEQ_NUM || buffer[2] != '@') //判断命令包是否正确，是否向自己查询
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{
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printf("Get Wrong Command[%d]: %c%c%c\n", size, buffer[0], buffer[1], buffer[2]);
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continue;
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}
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//命令包正确
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LED1_Toggle; // LED 翻转
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printf("Get Right Command[%d]: %c%c%c\n", size, buffer[0], buffer[1], buffer[2]);
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//返回最近一个获得的数据。由于无 DIO0 的 LoRa 通讯不可靠，发送 3 次
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for (uint8_t i = 0; i < 3; i++)
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{
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printf("Send!\n");
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LoRa_Send(&pack, sizeof(DataPack));
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Delay_ms(300);
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}
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}
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AHT20_Read(&(pack.humi), &(pack.temp)); // 80ms 后可读取 AHT20
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time = SysTick_GetRunTime();
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while (SysTick_CheckRunTime(time) < 100) //等待 100 ms
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{
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size = LoRa_Receive(buffer); //接收
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if (size < 1)
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{
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continue;
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}
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else if (size != 3 || buffer[0] != '#' || buffer[1] != NODE_SEQ_NUM || buffer[2] != '@') //判断命令包是否正确，是否向自己查询
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{
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printf("Get Wrong Command[%d]: %c%c%c\n", size, buffer[0], buffer[1], buffer[2]);
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continue;
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}
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//命令包正确
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LED1_Toggle; // LED 翻转
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printf("Get Right Command[%d]: %c%c%c\n", size, buffer[0], buffer[1], buffer[2]);
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//返回最近一个获得的数据。由于无 DIO0 的 LoRa 通讯不可靠，发送 3 次
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for (uint8_t i = 0; i < 3; i++)
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{
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printf("Send!\n");
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LoRa_Send(&pack, sizeof(DataPack));
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Delay_ms(300);
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}
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}
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pack.light = BH1750_Read(); // 180ms 后才能读取 BH1750
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}
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return 1;
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}
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