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。

stm32f103zet6GPIO

### STM32F103ZET6 GPIO Configuration and Usage Examples

For configuring the General-Purpose Input/Output (GPIO) pins on an STM32F103ZET6 microcontroller, several steps must be followed to ensure proper initialization and operation of these pins. The process can be efficiently managed using tools like ST's CubeMX software or directly through code when working within environments such as PlatformIO integrated with VSCode.

#### Initialization Using HAL Library Functions
The Hardware Abstraction Layer (HAL) library simplifies peripheral control by providing ready-to-use functions that abstract hardware-specific details away from developers. For initializing a GPIO pin:

// Define the GPIO structure parameters.
GPIO_InitTypeDef GPIO_InitStruct = {0};

// Enable clock for the specific GPIO port being used.
__HAL_RCC_GPIOA_CLK_ENABLE();

// Configure PA0 as output push-pull mode at low speed.
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

This example sets up Port A Pin 0 (`PA0`) as an output in push-pull configuration without pull-up/pull-down resistors enabled[^1].

#### Reading and Writing Digital Signals
Once configured, reading input values or writing outputs becomes straightforward via provided API calls:

To set `PA0` high:

HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_SET);

To read the state of another pin, say `PB1`, after setting it as input:

uint8_t value = HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1);
if(value != GPIO_PIN_RESET){
    // PB1 is HIGH
}
else{
    // PB1 is LOW
}

These operations allow direct manipulation of digital signals connected to the specified I/O lines while adhering closely to best practices outlined in development guidelines related to this device family.

#### Interrupt Handling Example
Interrupts provide efficient ways to respond asynchronously to changes occurring externally relative to program flow. Setting up interrupts involves configuring EXTI lines associated with particular ports and enabling corresponding NVIC channels:

// Assuming PC13 has been previously initialized as input.
EXTI_HandleTypeDef hexti;

hexti.Instance = EXTI13; 
hexti.Init.Trigger = EXTI_TRIGGER_RISING_FALLING;
hexti.Init.LineCmd = ENABLE;

if(HAL_EXTI_Init(&hexti)!= HAL_OK){
    Error_Handler();
}

NVIC_SetPriority(EXTI15_10_IRQn, 0);  
NVIC_EnableIRQ(EXTI15_10_IRQn);

void EXTI15_10_IRQHandler(void){
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_13);
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
    if(GPIO_Pin == GPIO_PIN_13){
        // Handle interrupt event here...
    }
}

In summary, configuring and utilizing GPIO functionalities on STM32 devices requires careful setup but offers powerful capabilities once implemented correctly according to established procedures found in official documentation and community resources.