发送不定长，但有固定结束符的串口，支持超时判断

/**

---

• @file : main.c
• @brief : Main program body

---

** This notice applies to any and all portions of this file

• that are not between comment pairs USER CODE BEGIN and
• USER CODE END. Other portions of this file, whether
• inserted by the user or by software development tools
• are owned by their respective copyright owners.
• COPYRIGHT© 2020 STMicroelectronics
• Redistribution and use in source and binary forms, with or without modification,
• are permitted provided that the following conditions are met:
• 1. Redistributions of source code must retain the above copyright notice,

•  this list of conditions and the following disclaimer.
  

• 2. Redistributions in binary form must reproduce the above copyright notice,

•  this list of conditions and the following disclaimer in the documentation
  

•  and/or other materials provided with the distribution.
  

• 3. Neither the name of STMicroelectronics nor the names of its contributors

•  may be used to endorse or promote products derived from this software
  

•  without specific prior written permission.
  

• THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”
• AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
• IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
• DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
• FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
• DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
• SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
• CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
• OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
• OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

---

/
/ Includes ------------------------------------------------------------------*/
#include “main.h”
#include “stm32f1xx_hal.h”

/* USER CODE BEGIN Includes /
#include “string.h”
/ USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim3;

UART_HandleTypeDef huart1;

/* 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_TIM3_Init(void);

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

/* USER CODE END PFP */

/* USER CODE BEGIN 0 /
typedef unsigned char uchar;
typedef unsigned int uint;
uchar flag;
uchar rxbuf[20];
uchar rxcount;
uchar rxbyte;
/ USER CODE END 0 */

/**

• @brief The application entry point.
• @retval None
  /
  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_TIM3_Init();
/ USER CODE BEGIN 2 */
HAL_UART_Receive_IT(&huart1,&rxbyte,1);

/* USER CODE END 2 */

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

/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */
if(flag)
{
HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_5);
flag=0;
}
HAL_TIM_Base_Start_IT(&htim3);

}
/* USER CODE END 3 */

}

/**

• @brief System Clock Configuration
• @retval None
  */
  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_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(FILE, LINE);
}

/**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_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
_Error_Handler(FILE, LINE);
}

/**Configure the Systick interrupt time 
*/

HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

/**Configure the Systick 
*/

HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

/* TIM3 init function */
static void MX_TIM3_Init(void)
{

TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_MasterConfigTypeDef sMasterConfig;

htim3.Instance = TIM3;
htim3.Init.Prescaler = 7200-1;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 10000-1;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
{
_Error_Handler(FILE, LINE);
}

sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
{
_Error_Handler(FILE, LINE);
}

sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
{
_Error_Handler(FILE, LINE);
}

}

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

huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
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(FILE, LINE);
}

}

/** 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_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();

/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);

/*Configure GPIO pin : LED1_Pin */
GPIO_InitStruct.Pin = LED1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
UNUSED(huart);
rxbuf[rxcount++]=rxbyte;

HAL_TIM_Base_Stop(&htim3);
if(rxbyte==0x0a)
{
	
	if(strcmp(rxbuf,"1234567890\r\n")==0)
	{
		flag=1;
	}
	while(	HAL_UART_Transmit_IT(&huart1,rxbuf,rxcount)==HAL_OK);
	rxcount=0;
}
if(rxcount==20)
	rxcount=0;
while(HAL_UART_Receive_IT(&huart1,&rxbyte,1)==HAL_OK);
HAL_TIM_Base_Start(&htim3);

}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef htim)
{
if(htim->Instance==TIM3)
{
rxcount=0;
memset(rxbuf,0,16);
//HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_5);
}
}
/ 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 */
  }

#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,
  tex: printf(“Wrong parameters value: file %s on line %d\r\n”, file, line) /
  / USER CODE END 6 /
  }
  #endif / USE_FULL_ASSERT */

/**

• @}
  */

/**

• @}
  */

/************************ © COPYRIGHT STMicroelectronics *END OF FILE/