stm32f103zet6 串口2双工配置

以下是基于HAL库的STM32F103ZE串口2双工配置代码示例：

首先，需要在CubeMX中配置串口2为双工模式，并设置波特率等参数。然后，生成并打开代码，找到main.c文件。

在main函数中，需要初始化HAL库和串口2：

/* Initialize HAL library */
HAL_Init();

/* Initialize UART2 */
MX_USART2_UART_Init();

其中，MX_USART2_UART_Init()是由CubeMX自动生成的函数，用于初始化串口2。

接下来，在while循环中，可以通过HAL库提供的函数HAL_UART_Receive()和HAL_UART_Transmit()来实现串口2的接收和发送操作。例如：

uint8_t rx_data;
uint8_t tx_data[] = "Hello, world!\r\n";

/* Receive data from UART2 */
HAL_UART_Receive(&huart2, &rx_data, 1, HAL_MAX_DELAY);

/* Send data to UART2 */
HAL_UART_Transmit(&huart2, tx_data, strlen(tx_data), HAL_MAX_DELAY);

在以上示例中，使用HAL_UART_Receive()函数从串口2接收一个字节的数据，并存储到rx_data变量中。使用HAL_UART_Transmit()函数发送一个字符串到串口2。

完整的代码示例：

#include "main.h"
#include "stm32f1xx_hal.h"
#include <string.h>

UART_HandleTypeDef huart2;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);

int main(void)
{
  /* Initialize HAL library */
  HAL_Init();

  /* Initialize system clock */
  SystemClock_Config();

  /* Initialize UART2 */
  MX_USART2_UART_Init();

  while (1)
  {
    uint8_t rx_data;
    uint8_t tx_data[] = "Hello, world!\r\n";

    /* Receive data from UART2 */
    HAL_UART_Receive(&huart2, &rx_data, 1, HAL_MAX_DELAY);

    /* Send data to UART2 */
    HAL_UART_Transmit(&huart2, tx_data, strlen(tx_data), HAL_MAX_DELAY);
  }
}

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();
  }
}

static 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();
  }
}

void Error_Handler(void)
{
  __disable_irq();
  while (1)
  {
  }
}