I would like to use one of the extra serial output on a Mega to drive a serial backpack on an LCD display.
I know that receiving on the uart causes interrupts, I would just be sending. I have sent debugging info to the serial monitor and never heard any disturbance (it is a synthesizer, which uses interrupts, and parallel display or other interrupts stepping on my ISR causes all kinds of pops and crackles) so that leads me to believe it should be fine.
I just want to be sure before i go and buy a serial backpack and then find out its not going to work without disturbing the sound. I am hoping it is similar to writing to a port.
any insight would be greatly appreciated.