MPU6050(姿态传感器)
BH1750(光照度)
HDC1080(温湿度)
MCP3421(数模转换)
都在一个I2C总线上

main.c

  1. /**********************
  2. 芯片：STM32F103
  4. 实现功能：
  6. 引脚：
  7. ***********************/
  8. #include "stdio.h"
  10. #include "stm32f10x.h"
  11. #include "main.h"
  12. #include "bsp_DMAusart2.h"
  13. #include "bsp_tim3.h"
  14. #include "bsp_tim2.h"
  15. #include "bsp_SysTick.h"
  16. #include "bsp_dwt.h"
  19. #include "bsp_i2c.h"
  20. #include "bsp_crc.h"
  21. #include "bsp_mpu6050.h"
  22. #include "bsp_bh1750.h"
  23. #include "bsp_hdc1080.h"
  24. #include "bsp_mcp3421.h"
  27. extern unsigned int Task_Delay[NumOfTask];
  28. uint8_t Scan_key_flag;
  30. float DWT_UsedTime = 0; //DWT
  32. int main()
  33. {
  35.     // 初始化USART
  36.     USART2_DMA_Init(9600, TwoUART.Tx_buf, TwoUART.Rx_buf, USART2_REC_LEN);
  37.     USART2_DMASendString("AppStart!\n", sizeof("AppStart!"));
  39.     // 初始化定时器
  40.     TIM2_Init();
  41.     //TIM3_Init(36-1, 1);1us
  42.     TIM3_Int_Init(71, 999); // 1ms
  44.     uint8_t status1 = 0;
  45.     uint8_t hdc1080_delay = 0;
  46.     uint8_t bh1750_delay = 0;
  47.     uint8_t hdc1080_init_flage = 0;
  48.     float bh1750_dat;
  49.     float temper = 0, humidity = 0;
  50.     float mcp3421_dat = 0;
  51.     int bh1750_err = 0, hdc1080_err = 0, MCP3421_err = 0;
  52.     short mpu6050_Accel[3]; // 加速度
  53.     short mpu6050_Gyro[3]; // 陀螺仪
  54.     float mpu6050_Temp; // 姿态传感器内部温度
  55.     uint8_t mpu6050_init_flage = 0;
  57.     while(1)
  58.     {
  59.         DWT_UsedTime = DWT_TS_GET_Flag();
  60.         if(Scan_key_flag == 1)
  61.         {
  62.             Scan_key_flag = 0;
  63.             // 计数
  64.             hdc1080_delay++;
  65.             bh1750_delay++; 
  66.         }
  68.         switch(status1)
  69.         {
  70.             case 0: // bh1750光照
  72.                 bh1750_err = BH1750_READ_DATA(&bh1750_dat , &bh1750_delay);
  73.                 if(bh1750_err >= 0)
  74.                 {
  75.                     status1 = 1;
  76.                 }
  77.                 break;
  78.             case 1: // mcp3421温湿度
  79.                 if(hdc1080_init_flage == 0)
  80.                 {
  81.                     HDC1080_Init();
  82.                     hdc1080_init_flage = 1;
  83.                 }else
  84.                 {
  85.                     hdc1080_err = HDC1080_Read_TemperAndHumidity( &temper, &humidity, &hdc1080_delay);
  86.                     if(hdc1080_err >= 0)
  87.                     {
  88.                         status1 = 2;
  89.                     }
  90.                 }
  92.                 break;
  93.             case 2: // hdc1080数压力
  94.                 MCP3421_Init();
  95.                 MCP3421_Read(&mcp3421_dat);
  96.                 status1 = 3;
  97.                 break;
  98.             case 3: // mpu6050姿态传感器
  99.                 if(mpu6050_init_flage == 0)
  100.                 {
  101.                     MPU6050_Init();
  102.                     mpu6050_init_flage = 1;
  103.                 }else
  104.                 {
  105.                     if(MPU6050ReadID() == 1) // 检测MPU是否存在
  106.                     {
  107.                         MPU6050ReadAcc(mpu6050_Accel); // 加速度
  108.                         MPU6050ReadGyro(mpu6050_Gyro); // 陀螺仪
  109.                         MPU6050_ReturnTemp(&mpu6050_Temp); // 器件内部温度
  110.                     }
  111.                     status1 = 0;
  112.                 }
  114.                 break;
  115.         }
  117.         DWT_UsedTime = DWT_TS_GET();
  120.         // 输出数据
  121.         if(bh1750_err >=0 && hdc1080_err >=0 )
  122.         {
  123.             char buffer6[256] = {0};
  124.             sprintf(buffer6, "时间: %6.7f 计数：%d 光照: %5.5f 温度: %5.5f 湿度: %5.5f 压力: %5.5f Status%d\r\n 姿态: 加速度: %d %d %d 陀螺仪:%d %d %d 温度:%5.2f\r\n", 
  125.                     DWT_UsedTime/72000000.0, hdc1080_delay, bh1750_dat, temper, humidity, mcp3421_dat, status1,
  126.                     mpu6050_Accel[0], mpu6050_Accel[1], mpu6050_Accel[2], 
  127.                     mpu6050_Gyro[0], mpu6050_Gyro[1], mpu6050_Gyro[2], mpu6050_Temp); // 计数耗时时间
  128.             USART2_DMASendString(buffer6, 256);
  129.         }
  130.     }
  131. }

程序：

STM32_Project_I2C_Connect5.zip