Configure pins as * Analog * Input * Output * EVENT_OUT * EXTI */ static void MX_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct; /* GPIO Ports Clock Enable */ //__HAL_RCC_GPIOH_CLK_ENABLE(); __HAL_RCC_GPIOC_CLK_ENABLE(); //__HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOD_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); /*Configure GPIO pin Output Level */ HAL_GPIO_WritePin(LEDR_OUT_PD3_GPIO_Port, LEDR_OUT_PD3_Pin, GPIO_PIN_SET); /*Configure GPIO pin Output Level */ //HAL_GPIO_WritePin(GPIOB, RS485_RE_OUT_PB8_Pin|RS485_SE_OUT_PB9_Pin, GPIO_PIN_RESET); /*Configure GPIO pin : LEDR_OUT_PD3_Pin */ GPIO_InitStruct.Pin = LEDR_OUT_PD3_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; HAL_GPIO_Init(LEDR_OUT_PD3_GPIO_Port, &GPIO_InitStruct); /*Configure GPIO pins : RS485_RE_OUT_PB8_Pin RS485_SE_OUT_PB9_Pin */ GPIO_InitStruct.Pin = RS485_RE_OUT_PB8_Pin|RS485_SE_OUT_PB9_Pin; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ /** * @brief This function is executed in case of error occurrence. * @param file: The file name as string. * @param line: The line in file as a number. * @retval None */ void _Error_Handler(char *file, int line) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ while(1) { } /* USER CODE END Error_Handler_Debug */

这是用于初始化GPIO引脚的函数。在该函数中，首先使能了GPIOC、GPIOD和GPIOB端口的时钟。然后，配置了LEDR_OUT_PD3_Pin引脚为输出模式，初始电平为高电平。接着，配置了RS485_RE_OUT_PB8_Pin和RS485_SE_OUT_PB9_Pin引脚为输出模式，初始电平为高电平。最后，定义了一个错误处理函数_Error_Handler，当发生错误时会进入该函数进行处理。

需要注意的是，该函数中有一段注释掉的代码，可能是之前的配置代码被注释掉了。

相关问题

cubemx stm32 配置两个串口_STM32CubeMX的串口配置，以及驱动代码

好的，下面是使用 `STM32CubeMX` 配置两个串口的步骤和相应的驱动代码。

### 配置步骤

1. 打开 `STM32CubeMX`，选择对应的芯片型号。
2. 在 `Pinout & Configuration` 标签页中，选择 `USART1` 和 `USART2`。
3. 选择 `Mode` 为 `Asynchronous`，`Hardware Flow Control` 为 `None`。
4. 配置 `Baud Rate`、`Word Length`、`Parity`、`Stop Bits` 等串口参数。
5. 在 `NVIC Settings` 标签页中，打开 `USART1` 和 `USART2` 的中断。
6. 点击 `Generate Code` 生成代码。

### 驱动代码

下面是使用 `HAL` 库驱动两个串口的示例代码（默认使用 `USART1` 和 `USART2`）：

#include "main.h"
#include "stm32f4xx_hal.h"

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;
UART_HandleTypeDef huart2;

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_USART2_UART_Init(void);

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  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();
  MX_USART2_UART_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */

  }
  /* USER CODE END 3 */
}

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

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  /**Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /**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_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  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_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
}

/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
void MX_GPIO_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStruct;

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

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET);

  /*Configure GPIO pin : PB12 */
  GPIO_InitStruct.Pin = GPIO_PIN_12;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/* USART1 init function */
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();
  }

}
/* USART2 init function */
void MX_USART2_UART_Init(void)
{

  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  while(1) 
  {
  }
  /* USER CODE END Error_Handler_Debug */ 
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

以上代码中，`USART1` 和 `USART2` 的初始化函数分别为 `MX_USART1_UART_Init()` 和 `MX_USART2_UART_Init()`。其他部分为 `STM32CubeMX` 自动生成的代码，可以根据需要进行修改。需要注意的是，如果使用了 `HAL_UART_Receive_IT()` 等函数，还需要在 `stm32f4xx_it.c` 文件中实现相应的中断处理函数。

您需要编写一个C程序来： •初始化GPIO外围设备 •初始化UART外围设备，以9600波特接收ASCII字符“A”到“Z” •初始化一个内部数组，以容纳头和尾的10个字符：CharBuff •重复以下步骤 o当串行通信端口接收到数据时，读取ASCII字符X， o如果接收到的字符X是大写字母，则将其添加到CharBuff中，否则忽略。 o当CharBuff不为空时，通过闪烁LED（为您提供的代码）传输存储的最旧字符的莫尔斯电码。 o当CharBuff满时，禁用UART RX。 o如果UART RX被禁用，按下按钮P_B1将激活它；否则，按下按钮不会影响您的程序。 建议您使用中断来控制UART接收数据，并协调CharBuff和P_LD2之间的操作。

好的，这是一个比较复杂的问题，需要分步骤来完成。以下是C程序的框架，供您参考：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "stm32f4xx.h"

#define MAX_CHAR 10

char CharBuff[MAX_CHAR];
int CharBuffHead = 0;
int CharBuffTail = 0;

void GPIO_Init(void);
void UART_Init(void);
void MorseCode_Transmit(char c);
void Disable_UART_RX(void);
void Enable_UART_RX(void);

int main(void) {
    GPIO_Init();
    UART_Init();

    while(1) {
        // Do something
    }
}

void GPIO_Init(void) {
    // TODO: Initialize GPIO peripherals
}

void UART_Init(void) {
    // TODO: Initialize UART peripherals
}

void MorseCode_Transmit(char c) {
    // TODO: Transmit Morse code for the given character
}

void Disable_UART_RX(void) {
    // TODO: Disable UART RX
}

void Enable_UART_RX(void) {
    // TODO: Enable UART RX
}

void USART2_IRQHandler(void) {
    // TODO: Handle UART interrupt
}

void EXTI0_IRQHandler(void) {
    // TODO: Handle button interrupt
}

下面是对每个函数的解释和实现：

1. `GPIO_Init()`：初始化GPIO外围设备，包括LED和按钮的GPIO口。

void GPIO_Init(void) {
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOC, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;

    // Configure LED GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // Configure button GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
}

2. `UART_Init()`：初始化UART外围设备，以9600波特接收ASCII字符“A”到“Z”。

void UART_Init(void) {
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;

    // Configure UART TX GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // Configure UART RX GPIO
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // Connect UART pins to AF
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);

    USART_InitTypeDef USART_InitStructure;

    // Configure USART
    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART2, &USART_InitStructure);

    NVIC_InitTypeDef NVIC_InitStructure;

    // Enable USART2 IRQ
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    // Enable USART2 RX interrupt
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

    // Enable USART2
    USART_Cmd(USART2, ENABLE);
}

3. `MorseCode_Transmit(char c)`：通过闪烁LED传输存储的最旧字符的莫尔斯电码。

void MorseCode_Transmit(char c) {
    // TODO: Transmit Morse code for the given character
    // Implement Morse code transmission algorithm here
    // Use GPIOA Pin 5 to control LED
    // Blink LED to transmit Morse code
}

4. `Disable_UART_RX()`：当CharBuff满时，禁用UART RX。

void Disable_UART_RX(void) {
    USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
}

5. `Enable_UART_RX()`：如果UART RX被禁用，按下按钮P_B1将激活它；否则，按下按钮不会影响您的程序。

void Enable_UART_RX(void) {
    if (USART_GetITStatus(USART2, USART_IT_RXNE) == RESET) {
        USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
    }
}

6. `USART2_IRQHandler()`：处理UART中断，读取ASCII字符X，如果接收到的字符X是大写字母，则将其添加到CharBuff中，否则忽略。

void USART2_IRQHandler(void) {
    if (USART_GetITStatus(USART2, USART_IT_RXNE) == SET) {
        char c = USART_ReceiveData(USART2);

        if (c >= 'A' && c <= 'Z') {
            if ((CharBuffTail + 1) % MAX_CHAR != CharBuffHead) {
                CharBuff[CharBuffTail] = c;
                CharBuffTail = (CharBuffTail + 1) % MAX_CHAR;
            } else {
                // CharBuff is full, disable UART RX
                Disable_UART_RX();
            }
        }
    }
}

7. `EXTI0_IRQHandler()`：处理按钮中断，如果UART RX被禁用，按下按钮P_B1将激活它。

void EXTI0_IRQHandler(void) {
    if (EXTI_GetITStatus(EXTI_Line0) != RESET) {
        if (USART_GetITStatus(USART2, USART_IT_RXNE) == RESET) {
            Enable_UART_RX();
        }

        EXTI_ClearITPendingBit(EXTI_Line0);
    }
}

最后，需要在main函数中启用中断：

int main(void) {
    GPIO_Init();
    UART_Init();

    NVIC_InitTypeDef NVIC_InitStructure;

    // Enable button interrupt
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
    SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource0);
    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    EXTI_InitTypeDef EXTI_InitStructure;
    EXTI_InitStructure.EXTI_Line = EXTI_Line0;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    while(1) {
        // Do something
    }
}

以上是一个初步的程序框架，需要根据硬件和具体需求进行优化和修改。