Untitled

#include<stm32h7xx.h>
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

TIM_HandleTypeDef htim6;
TIM_HandleTypeDef htim7;

UART_HandleTypeDef huart3;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART3_UART_Init(void);
static void MX_USB_OTG_HS_USB_Init(void);
static void MX_TIM6_Init(void);
static void MX_TIM7_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */
uint8_t s[] = "System started(Y/N)\r\n";
uint8_t tx[] = "Status of seatbelt(S/n)";
uint8_t tx1[] = "Seat belt is fastened\r\n";
uint8_t tx2[] = "Please Fastened the seatbelt\r\n";
uint8_t tx3[] = "Car is started\r\n";
uint8_t tx4[] = "Speed\r\n";
uint8_t speed =0;
uint8_t km1[] ="Speed is 5KMPH\r\n";
uint8_t km2[] ="Speed is 10KMPH\r\n";
uint8_t km3[] ="Speed is 15KMPH\r\n";
uint8_t km4[] ="Speed is 20KMPH\r\n";
char sys;
uint8_t D;
uint8_t ch;

/**
  * @brief  The application entry point.
  * @retval int
  */
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_USART3_UART_Init();
  MX_USB_OTG_HS_USB_Init();
  MX_TIM6_Init();
  MX_TIM7_Init();
  /* USER CODE BEGIN 2 */

  HAL_UART_Transmit(&huart3,s,sizeof(s),HAL_MAX_DELAY);
  if(HAL_UART_Receive(&huart3,&sys,sizeof(sys),HAL_MAX_DELAY)== HAL_OK)
  {
	  if(sys=='Y'){
	  HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,SET);
	  HAL_UART_Transmit(&huart3,tx3,sizeof(tx3),HAL_MAX_DELAY);
	  while(speed<=20){
	  			 speed = speed+5;
	  			 HAL_TIM_Base_Start_IT(&htim6);
	  			HAL_UART_Transmit(&huart3,tx4,sizeof(tx4),HAL_MAX_DELAY);
	  			 HAL_TIM_Base_Start_IT(&htim7);

	  }

	  }



 }



  /* USER CODE END 2 */

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

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
	if(htim == &htim6)
	{


		HAL_TIM_Base_Stop_IT(&htim6);
//		HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,SET);
		HAL_UART_Transmit(&huart3,km1,sizeof(km1),HAL_MAX_DELAY);
		HAL_UART_Transmit(&huart3,km2,sizeof(km2),HAL_MAX_DELAY);
		HAL_UART_Transmit(&huart3,km3,sizeof(km3),HAL_MAX_DELAY);
		HAL_UART_Transmit(&huart3,km4,sizeof(km4),HAL_MAX_DELAY);
	}
  if(htim == &htim7)
		{
		if(speed==20)
		{


			if(HAL_UART_Receive(&huart3,&ch,sizeof(ch),HAL_MAX_DELAY) == HAL_OK)
		    {

				  	if(ch == 'S')
				  	{
				  		HAL_UART_Transmit(&huart3,tx1,sizeof(tx1),HAL_MAX_DELAY);
				  	}
				  	else
				    {
				  		HAL_UART_Transmit(&huart3,tx2,sizeof(tx2),HAL_MAX_DELAY);

				  	}
			}
		}
		}
}