ST意法半导体中文论坛【Nucleo-F303RE开发】关于UART中断发送丢失数据问题请教

【Nucleo-F303RE开发】关于UART中断发送丢失数据问题请教

lkl0305 提问时间：2015-5-27 14:42 /

问答
是否解决:

本帖最后由 lkl0305 于 2015-5-27 14:43 编辑

今天写了一个UART的HAL库中断发送数据的程序，本来要发送两个字符串，但是串口发送时只输出了1个字符串，请问大家程序出了什么问题，请高手帮助解答。
如图主程序：
每2秒循环发送2个字符串：

但是串口接收的数据只有一个字符串：

主函数我把CUBEMX自动生成的注释给删掉，看着短一些：

#include "stm32f3xx_hal.h"

UART_HandleTypeDef huart2;

#define TXBUFFERSIZE1                            COUNTOF(TxBuffer1)
#define TXBUFFERSIZE2                            COUNTOF(TxBuffer2)

#define COUNTOF(__BUFFER__) (sizeof(__BUFFER__) / sizeof(*(__BUFFER__)))

static __IO ITStatus UartReady = RESET;
uint8_t TxBuffer1[] = "第一个字符串\n";
uint8_t TxBuffer2[] = “第二个字符串\n";

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

int main(void)
{

  HAL_Init();

  SystemClock_Config();

  MX_GPIO_Init();
  MX_USART2_UART_Init();
  while (1)
  {
HAL_UART_Transmit_IT(&huart2, (uint8_t *)TxBuffer1, TXBUFFERSIZE1);
while (UartReady != SET)
{
   ;
}
UartReady = RESET;

HAL_UART_Transmit_IT(&huart2, (uint8_t *)TxBuffer2, TXBUFFERSIZE2);
while (UartReady != SET)
{
   ;
}
UartReady = RESET;

HAL_Delay(2000);

  }

}

void SystemClock_Config(void)
{

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInit;

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
  HAL_RCC_OscConfig(&RCC_OscInitStruct);

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);

  __SYSCFG_CLK_ENABLE();

}

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;
  huart2.Init.OneBitSampling = UART_ONEBIT_SAMPLING_DISABLED ;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  HAL_UART_Init(&huart2);

}

void MX_GPIO_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStruct;

  /* GPIO Ports Clock Enable */
  __GPIOA_CLK_ENABLE();

  /*Configure GPIO pin : PA5 */
  GPIO_InitStruct.Pin = GPIO_PIN_5;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
  UartReady = SET;
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  UartReady = SET;
}