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.

1. 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.

1. 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 */

/**

@}
*/

/**

@}
*/

发送不定长，但有固定结束符的串口，支持超时判断

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