Timer interrupt with Blue Pill using STM32CubeIDE

Prerequisites

This project assumes you have already installed STM32CubeIDE. You need to have previously done a basic blink sketch with blue-pill using STM32CubeIDE. I have made a complete video from installing STM32CubeIDE to LED blink program. You can watch it by clicking this link. https://www.youtube.com/watch?v=kXg467nVd_A

Wiring Diagram

STM32CubeIDE Settings

Click RCC → High Speed Clock (HSE) to Crystal/Ceramic Resonator

Click Clock Configuration tab → HCLK (MHz) to 72

Click Pinout and Configuration tab

Click Timer → Click TIM2 →

Clock Source set to Internal Clock (Select)

Configuration → Parameter Settings →

Prescaler set to 7200

Counter Period to 2000

Configuration → NVIC Settings → TIM2 global interrupt (Tick)

Click Timer → Click TIM3 →

Internal Clock (Tick)

Configuration → Parameter Settings →

Prescaler set to 7200

Counter Period to 3000

Configuration → NVIC Settings → TIM3 global interrupt (Tick)

Click Timer → Click TIM4 →

Internal Clock (Tick)

Configuration → Parameter Settings →

Prescaler set to 7200

Counter Period to 7000

Configuration → NVIC Settings → TIM4 global interrupt (Tick)

Set PA2, PA3 and PA4 GPIO_Output

Additional code on top of STM32CubeIDE generated code

  /* USER CODE BEGIN 2 */
  HAL_TIM_Base_Start_IT(&htim2);
  HAL_TIM_Base_Start_IT(&htim3);
  HAL_TIM_Base_Start_IT(&htim4);
  /* USER CODE END 2 */

/* USER CODE BEGIN 4 */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  if(htim->Instance == TIM2)
  {
    HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_2);
  }
  if(htim->Instance == TIM3)
  {
    HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_3);
  }
  if(htim->Instance == TIM4)
  {
    HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_4);
  }
}
/* USER CODE END 4 */