I am currently working on a project that requires two separate microcontroller to work together, but since I am still working on the project I generally need to update their programs.
I couldn't find a solution to my problem and that's why I am programming the second microcontroller unplugging UART connections and connecting it to USB to TTL adapter. After programming make those connections again with other microcontroller.
As you see it is long even when I am describing.
I am using two AVRs. (Atmega32 and Atmega328p). Is there a way to program 328p with 32?
NOTE: In operational configuration they are communication via serial communication. I want to program one with another without changing this configuration.