STM32H743zit6 After the timing interrupt is enabled, the interrupt callback function is executed repeatedly, and other programs cannot be executed?

[AASD.1]

• CUBEMX Settings as above:
• The callback function is as follows：

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
 
{
 
	if(htim->Instance == TIM2)
 
	{
 
		LL_GPIO_TogglePin(CLK_GPIO_Port,CLK_Pin); 
 
	}
 
}

• The call code is as follows:

USB_printf("1");
 
HAL_TIM_Base_Start_IT(&htim2);
 
USB_printf("2");

• The result is shown below:

After receiving 1, the serial assistant no longer receives it and has no reaction when stuck, the pin turns over normally, and the callback function executes normally.

[Pavel A.]

833 KHz? Really? :face_with_medical_mask:

[AASD.1]

I want to output a 4MHz frequency clock signal.Can't it do that?

[Piranha]

For such purposes timers have output channels, which can generate PWM. Read the reference manual and application notes.