Using a single chip microcomputer to read out segment code LCD

warlock1998

Using a single chip microcomputer to read out segment code LCD [Copy link]

Carry out secondary development of existing products and read out the data of the segment code display screen. My method: Use a single-chip microcomputer to read the level status of the com terminal and the sig terminal to see the level change of the corresponding com and sig when a stroke is being displayed. When the level of the LCD's com terminal changes, a falling edge interrupt is triggered, and the trigger interrupt reads the corresponding level status of the sig terminal. The current problem is that after com1 and com2 trigger interrupts, there is a problem with the level status of the corresponding sig terminal.

!!! !!! !!! Request: I hope there is a method to read from the segment code LCD or a method to solve my current problem.

warlock1998

Looking for a way to implement it, or a solution.

wangerxian

Don't quite understand the problem to be solved.

chunyang

Which control terminal? Why is it "abnormal"? The description is unclear, the information is insufficient, and I don't understand what you are saying.

If you want to get timely and effective help, you must first learn to describe the problem correctly and completely. Pictures are required.

sint27

Do you have a drawing of the LCD? If you have one, it's clear what it shows.

If you don't have one, find an LCD manufacturer. They have machines that can copy the drawings one-to-one.