Hi I am using STM32H7A3 Nucleo board. I am using uart receive in interrupt mode by enabling global interrupt.

[JJoy.1]

After receiving some data through interrupt, Is there any way to disable interrupt mechanism and go back to blocking mode for receiving remaining data.

I tried NVIC_DisableIRQ(0 to disable interrupt.

After that when i tried to receive through blocking mode, it fails. I just need to know whether its possible in stm32?

[Pavel A.]

NVIC_DisableIRQ can be called anywhere.

But AFAIK there's no need to call NVIC_DisableIRQ(USART3_IRQn).

The UART interrupt handler in the HAL library (HAL_UART_IRQHandler) masks the UART RX interrupt at end of transfer.

[JJoy.1]

Thanks a lot Pavel for your valuable support. It was really helpful...