hi all,
I want to set up an external interrupt on PORTB pin0 (when PORTB pin0 is high) of my PIC18F4550 and an internal interrupt on USART of Rx.
In my external interrupt:
-I will use USART to transmit some bytes to the receiver, and expect to receive some data sent back from the receiver.
Is there any way that I can jump to the internal interrupt USART Rx while the external interrupt of PORTB pin0 is still high even it is done with it interrupt subroutine?
I've tried to clear the external interrupt flag bit (when I'm done with the subroutine while PORTB pin0 is still high), but still it continues to loop back the subroutine (not return to routine).
Could you please help me? Thank you.