STM32 Resetet durchgehend nach Shutdownmode

void SystemClock_Config (void) {

  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  /* activate the sysclock source */

  __HAL_RCC_HSI_ENABLE();

  /* Sysclock */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2|RCC_CLOCKTYPE_HCLK;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);

}

int main(void)

{

  /* clock initialization */

  SystemInit();

  SystemClock_Config();

  HAL_Init();

  debug_interface_init();

  __HAL_RCC_PWR_CLK_ENABLE();

        // Display wird hier beschrieben

        // Clear all interrupt flag

  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF1);

  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF2);

  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WUF4);

  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);

  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);

  RCC->CSR |= RCC_CSR_RMVF;

  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1_LOW);  // Button Center

  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN2_LOW);  // Button Left

  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN4_LOW);  // Button Right

  /* Set the RIS controller into deep sleep */

  HAL_PWREx_EnterSHUTDOWNMode();

  while(1) {}

}