MAX30102模块应用笔记-2

JasonWong284

已于 2023-02-16 12:19:44 修改

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分类专栏： MAX30102模块文章标签：单片机 stm32 嵌入式硬件

于 2023-02-12 16:38:19 首次发布

本文链接：https://blog.youkuaiyun.com/qq_47751851/article/details/128996280

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本文展示了如何在基于STM32F103C8T6的开发板上，使用HAL库进行系统时钟配置、LCD初始化及SPI通信，通过UART与MAX30102模块交互，实现实时数据传输到1.3寸IPS屏幕上显示的心率(SPO2)和脉搏(HR)信息。

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本篇接续MAX30102模块应用笔记-1

今天使用的是白牌开发板，主控芯片STM32F103C8T6，在KEIL集成开发环境下使用HAL库开发。开发板搭载1.3寸IPS屏幕，分辨率为240*240，驱动芯片为ST7789，通信接口为SPI

下面为主要代码

int main(void)
{
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
    LCD_Init(); 
    LCD_Clear(BLACK);
    HAL_UART_Transmit_IT(&huart1, stopBuffer, sizeof(stopBuffer)-1);
    HAL_Delay(50);
    HAL_UART_Transmit_IT(&huart1, startBuffer, sizeof(startBuffer)-1);
    HAL_Delay(50);
    HAL_UART_Receive_IT(&huart1, &rx_data, 1);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {

        HAL_UART_Transmit_IT(&huart1, spo2Buffer, sizeof(spo2Buffer)-1);
        HAL_Delay(500);
        HAL_UART_Transmit_IT(&huart1, hrBuffer, sizeof(hrBuffer)-1);
        HAL_Delay(500);
        LCD_Clear(BLACK);
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if(huart->Instance == USART1)
    {        
        receiveBuffer[rx_count]= rx_data;
        rx_count ++;
        if(rx_data == 0x0A)
        {            
            str1 = (char *)receiveBuffer;        //get uart data
            if(strstr(str1, "OK") != NULL)
            {
                
            }
            else if(strstr(str1, "HR") != NULL)
            {
                    for(int i =0;i<=rx_count-3;i++)
                        LCD_ShowChar(100+8*i,100,receiveBuffer[i],1,RED);
            }
            else if(strstr(str1, "SPO2") != NULL)
            {
                    for(int i =0;i<=rx_count-3;i++)
                        LCD_ShowChar(100+8*i,120,receiveBuffer[i],1,GREEN);
            }
            else
            {
                
            }
            rx_count = 0;
            //clear buff data 
            //清除数组数组，全部赋值为 零
            memset((char *)receiveBuffer, 0, strlen((const char*)receiveBuffer));
     } 
         HAL_UART_Receive_IT(&huart1,&rx_data,1);
    }
}

将食指指腹紧贴于MAX30102模块发出红光处，查看屏幕显示效果