external interrupts in 8051

[hbaruffa]

View attachment prognotepad.txtI have a program written from the 8051 to an LCD (JHD162A). I need to wire an external interrupt and get it programmed correctly in order to go from one 16*2 screen to another 16*2 screen. I am using the same LCD and would like the screen to change when the pushbutton is pressed. I believe I know how to wire it to the correct port, but how would I write it in the assembly program in order for it to change? I attached the assembly for the first screen that I had written to give more of an idea.

 

[IanP]

Your program displays Data, then Data2 and then stays in an endless loop – Again2 ..
Use a flag (bit) that is set when a button is pressed (ext int), read this flag in the endless loop and exit the loop when the flag (bit) is set ..

IanP
:wink: