How to use two microcontrollers to drive an LCD screen at the same time

清浪之歌

How to use two microcontrollers to drive an LCD screen at the same time [Copy link]

I would like to ask an expert on LCD timer made by microcontroller, how to realize two independent timers on one screen, including independent operation . using touch mode.

maychang

Why do we need two MCUs to drive one LCD screen? One servant, two masters. The two MCUs send different commands. Who do you want the LCD screen to obey?

maychang

"How to implement two independent timers on one screen including independent operation" Even if you need two independent timers, one microcontroller is enough. Even if you need eight independent timers, one microcontroller can handle it completely, as long as your LCD screen can display them.

ienglgge

This is not a conventional design method. What is the purpose of using two MCUs? A MCU with better performance has multiple timers, and they can work at the same time. Two MCUs send signals to the screen at the same time, which will cause problems. If time-sharing is used, regardless of the specific implementation method, time-sharing is already used, and the efficiency is not high. There is no point. It is better to use one.

wweiliang

Is it because there are not enough feet?

清浪之歌

maychang posted on 2018-10-24 15:15 Why do you use two microcontrollers to drive one LCD screen? One servant and two masters, the two microcontrollers send different commands, who do you want the LCD screen to listen to?

Thank you