Touch Sensor 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

Set PA1 to GPIO_Output

Set PB1 to GPIO_EXTI1

Click NVIC → EXTI line1 interrupt → Enabled (Tick)

Additional code on top of STM32CubeIDE generated code

/* USER CODE BEGIN 4 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
  if (GPIO_Pin == GPIO_PIN_1)
  {
    HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_1);
  }
}
/* USER CODE END 4 */