**Simple LD2 blinking with 2 periods - for delay variiable debuging set optimisation to none **
int main(void)
{

  /* USER CODE BEGIN 1 */
	uint32_t delay;
  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();

  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

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

  /* USER CODE BEGIN 3 */
	  if (HAL_GPIO_ReadPin(B1_GPIO_Port,B1_Pin))
		  delay = 100;
	  else
		  delay = 500;
	  HAL_Delay(delay);
	  HAL_GPIO_TogglePin(LD2_GPIO_Port,LD2_Pin);
  }
  /* USER CODE END 3 */

}

/** System Clock Configuration
*/


** End Of Example **

**PWM using delays example:**

int main(void)
{

  /* USER CODE BEGIN 1 */
	uint32_t delay,period,pwm;
  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();

  /* USER CODE BEGIN 2 */
  period = 20;	// in miliseconds
  pwm = 50; 	// in percents
  /* USER CODE END 2 */

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

  /* USER CODE BEGIN 3 */
	  if (HAL_GPIO_ReadPin(B1_GPIO_Port,B1_Pin))
		  {
		  	  pwm = 25;
		  	  HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,1);
		  	  delay = period*pwm;
		  	  delay = delay/100;
		  	  HAL_Delay(delay);
		  	  HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,0);
		  	  delay = period - delay;
		  	  HAL_Delay(delay);
		  }

	  else
		  {
		  	  delay = 500;
		  	  HAL_Delay(delay);
			  HAL_GPIO_TogglePin(LD2_GPIO_Port,LD2_Pin);
		  }


  }
  /* USER CODE END 3 */

}

/** System Clock Configuration
*/

** End Of Example **

**PWM using delays example no 2:**
int main(void)
{

  /* USER CODE BEGIN 1 */
	uint32_t delay,period,pwm,ton,toff;
  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();

  /* USER CODE BEGIN 2 */
  period = 20;	// in miliseconds
  pwm = 25; 	// in percents
  /* USER CODE END 2 */

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

  /* USER CODE BEGIN 3 */
  	  delay = period*pwm;
  	  ton = delay/100;
  	  toff= period - ton;
	  if (HAL_GPIO_ReadPin(B1_GPIO_Port,B1_Pin))
		  {
		  	  pwm = 25;
		  }

	  else
		  {
		  	  if (pwm==99)
		  		  pwm = 1;
		  	  else
		  		  pwm++;
		  }
  	  HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,1);
  	  HAL_Delay(ton);
  	  HAL_GPIO_WritePin(LD2_GPIO_Port,LD2_Pin,0);
  	  HAL_Delay(toff);


  }
  /* USER CODE END 3 */

}

/** System Clock Configuration
*/

** End Of Example **

**PWM using timer TIM2 example:**
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();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM2_Init();

  /* USER CODE BEGIN 2 */
  uint32_t delay=5;
  uint16_t pwm=0;

  HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);
  /* USER CODE END 2 */

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

  /* USER CODE BEGIN 3 */
	  for (pwm=0;pwm<500;pwm=pwm+10)
	  	  {
		  HAL_Delay(delay);
		  __HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, pwm);
	  	  }
	  for (pwm=0;pwm<500;pwm=pwm+5)
	  	  {
		  HAL_Delay(delay);
		  __HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, 500-pwm);
	  	  }
  }
  /* USER CODE END 3 */

}

/** System Clock Configuration

** End Of Example **

** For system clock = 80MHz //Timer PPM TIM2_CH1 (PA5 - LD2) prescaler=79, Counter period=20000 + Timer HCsr04 TIM3_CH1 prescaler=799, Counter period=10000 (PA6 - 10us co 100ms) + SWO printf debug + RS232 printf debug **
int main(void)
{

  /* USER CODE BEGIN 1 */
	uint32_t delay,period,pwm,ton,toff;
  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM2_Init();
  MX_USART2_UART_Init();
  MX_TIM3_Init();

  /* USER CODE BEGIN 2 */
  period = 20;	// in miliseconds
  pwm = 25; 	// in percents
  delay = 20;
  HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);
  HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_1);
  __HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_1, 1);
  /* USER CODE END 2 */

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

  /* USER CODE BEGIN 3 */
	  for (pwm=500;pwm<=2500;pwm=pwm+10)
	  	  {
		  HAL_Delay(delay);
		  __HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, pwm);
		  printf("PPM value = %i,us\n\r",pwm);
	  	  }
	  for (pwm=2500;pwm>=500;pwm=pwm-10)
	  	  {
		  HAL_Delay(delay);
		  __HAL_TIM_SetCompare(&htim2, TIM_CHANNEL_1, pwm);
	  	  }

  }
  /* USER CODE END 3 */

}

/** System Clock Configuration

*
*
*

/* USER CODE BEGIN 4 */
/*//SW0
int _write(int file, char *ptr, int len)
{
	int DataIdx;
	for(DataIdx=0; DataIdx<len; DataIdx++)
	{
		ITM_SendChar(*ptr++);
	}
	return 0;
}
*/

//*RS323
int _write(int file, char *ptr, int len)
{
	HAL_UART_Transmit(&huart2,ptr,len,10);
return len;
}
//*/
/* USER CODE END 4 */
** End Of Example **