stm32f103vet6 hal库开发中是如何激活上拉电阻的

在 STM32 HAL 库中，激活 GPIO 上拉电阻需要使用以下步骤：

1. 配置 GPIO 初始化结构体 `GPIO_InitTypeDef`，并设置相应的 GPIO 端口、引脚、模式、速率等参数。

2. 在初始化结构体中，设置 `GPIO_InitStruct.Pull` 参数为 `GPIO_PULLUP`，即激活上拉电阻。

3. 调用 `HAL_GPIO_Init()` 函数进行 GPIO 的初始化。

下面是一个示例代码，演示如何激活 PB0 引脚的上拉电阻：

GPIO_InitTypeDef GPIO_InitStruct;

// 配置 GPIO 初始化结构体
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

在上述代码中，`GPIO_PIN_0` 表示 PB0 引脚，`GPIO_MODE_INPUT` 表示输入模式，`GPIO_PULLUP` 表示激活上拉电阻。`HAL_GPIO_Init()` 函数将初始化结构体应用到 GPIOB 端口上，从而激活 PB0 引脚的上拉电阻。

相关问题

stm32f103vet6 hal库串口通信中断接收DMA发送

对于STM32F103VET6的HAL库串口通信中断接收DMA发送，可以按照以下步骤进行配置：

1. 在CubeMX中配置串口，选择需要使用的串口，并开启DMA模式。

2. 在代码中初始化串口和DMA：

/* UART handler declaration */
UART_HandleTypeDef UartHandle;

/* DMA handler declaration */
DMA_HandleTypeDef hdma_usart1_tx;
DMA_HandleTypeDef hdma_usart1_rx;

/* UART init function */
void MX_USART1_UART_Init(void)
{
  /* Configure the UART peripheral */
  UartHandle.Instance        = USART1;
  UartHandle.Init.BaudRate   = 115200;
  UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
  UartHandle.Init.StopBits   = UART_STOPBITS_1;
  UartHandle.Init.Parity     = UART_PARITY_NONE;
  UartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
  UartHandle.Init.Mode       = UART_MODE_TX_RX;
  if (HAL_UART_Init(&UartHandle) != HAL_OK)
  {
    Error_Handler();
  }

  /* Configure DMA for transmission */
  hdma_usart1_tx.Instance                 = DMA1_Channel4;
  hdma_usart1_tx.Init.Direction           = DMA_MEMORY_TO_PERIPH;
  hdma_usart1_tx.Init.PeriphInc           = DMA_PINC_DISABLE;
  hdma_usart1_tx.Init.MemInc              = DMA_MINC_ENABLE;
  hdma_usart1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_usart1_tx.Init.MemDataAlignment    = DMA_MDATAALIGN_BYTE;
  hdma_usart1_tx.Init.Mode                = DMA_NORMAL;
  hdma_usart1_tx.Init.Priority            = DMA_PRIORITY_LOW;
  if (HAL_DMA_Init(&hdma_usart1_tx) != HAL_OK)
  {
    Error_Handler();
  }
  __HAL_LINKDMA(&UartHandle, hdmatx, hdma_usart1_tx);

  /* Configure DMA for reception */
  hdma_usart1_rx.Instance                 = DMA1_Channel5;
  hdma_usart1_rx.Init.Direction           = DMA_PERIPH_TO_MEMORY;
  hdma_usart1_rx.Init.PeriphInc           = DMA_PINC_DISABLE;
  hdma_usart1_rx.Init.MemInc              = DMA_MINC_ENABLE;
  hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_usart1_rx.Init.MemDataAlignment    = DMA_MDATAALIGN_BYTE;
  hdma_usart1_rx.Init.Mode                = DMA_CIRCULAR;
  hdma_usart1_rx.Init.Priority            = DMA_PRIORITY_HIGH;
  if (HAL_DMA_Init(&hdma_usart1_rx) != HAL_OK)
  {
    Error_Handler();
  }
  __HAL_LINKDMA(&UartHandle, hdmarx, hdma_usart1_rx);

  /* Enable DMA interrupts */
  HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
  HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);
}

3. 配置串口中断和DMA接收中断：

/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);

/* DMA1_Channel5_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);

4. 在中断处理函数中读取接收到的数据，并设置DMA发送：

void USART1_IRQHandler(void)
{
  uint32_t isrflags   = READ_REG(UartHandle.Instance->SR);
  uint32_t cr1its     = READ_REG(UartHandle.Instance->CR1);
  uint32_t cr3its     = READ_REG(UartHandle.Instance->CR3);

  /* Read received data */
  if (((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
  {
    /* Clear the RXNE interrupt flag */
    __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE);

    /* Read received data */
    uint8_t data = (uint8_t)(UartHandle.Instance->DR);

    /* Process received data */
    // ...

    /* Restart DMA reception */
    HAL_UART_Receive_DMA(&UartHandle, &rx_buffer, RX_BUFFER_SIZE);
  }

  /* Transmit data using DMA */
  if (((isrflags & USART_SR_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
  {
    /* Clear the TXE interrupt flag */
    __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TXE);

    /* Transmit data using DMA */
    HAL_UART_Transmit_DMA(&UartHandle, &tx_buffer, TX_BUFFER_SIZE);
  }
}

void DMA1_Channel5_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart1_rx);
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  /* Process received data */
  // ...
}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
  /* Process transmitted data */
  // ...
}

5. 在主函数中启动串口接收：

int main(void)
{
  /* Initialize peripherals */
  MX_USART1_UART_Init();

  /* Start DMA reception */
  HAL_UART_Receive_DMA(&UartHandle, &rx_buffer, RX_BUFFER_SIZE);

  /* Infinite loop */
  while (1)
  {
    // ...
  }
}

这样，就可以在STM32F103VE中使用HAL库实现串口通信中断接收DMA发送的功能。

stm32f103vet6 hal库编写串口通信中断接收DMA发送

以下是使用HAL库编写串口通信中断接收DMA发送的示例代码：

#include "stm32f1xx_hal.h"

UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;
DMA_HandleTypeDef hdma_usart1_rx;

uint8_t tx_buffer[50];
uint8_t rx_buffer[50];

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART1_UART_Init(void);

/* USART1 init function */
static void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }

}

/* DMA init function */
static void MX_DMA_Init(void)
{

  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel4_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
  /* DMA1_Channel5_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);

}

/* GPIO init function */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* System Clock Configuration */
void SystemClock_Config(void)
{

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  /**Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /**Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }

}

/* USART1 DMA Transmit Complete callback */
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
  /* DMA transmit complete callback */
}

/* USART1 DMA Receive Complete callback */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  /* DMA receive complete callback */
}

/* USART1 Error callback */
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
  /* UART error callback */
}

int main(void)
{

  HAL_Init();

  SystemClock_Config();

  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART1_UART_Init();

  /* Enable USART1 DMA TX and RX interrupts */
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_TC);
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_RXNE);

  /* Start USART1 reception */
  HAL_UART_Receive_DMA(&huart1, rx_buffer, 50);

  while (1)
  {
    /* Wait for USART1 reception */
    if (HAL_UART_GetState(&huart1) == HAL_UART_STATE_READY)
    {
      /* Copy received data to transmit buffer */
      memcpy(tx_buffer, rx_buffer, sizeof(rx_buffer));

      /* Start USART1 transmission */
      HAL_UART_Transmit_DMA(&huart1, tx_buffer, sizeof(tx_buffer));
    }
  }

}

/* DMA1_Channel4_IRQn interrupt handler */
void DMA1_Channel4_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart1_tx);
}

/* DMA1_Channel5_IRQn interrupt handler */
void DMA1_Channel5_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart1_rx);
}

在该示例代码中，使用HAL库初始化了USART1、GPIO和DMA模块，并启用USART1的DMA传输中断。在main函数中，使用HAL库启用了USART1接收DMA传输，并在while循环中等待接收完成。一旦接收完成，将接收缓冲区中的数据复制到发送缓冲区，并启动USART1的DMA传输发送数据。在USART1的DMA传输完成后，将调用相应的回调函数进行处理。