Mess around keypad

I found that some computers may only recognize the keyboard and have no response when pressing the keyboard.

Program Burning:

You can directly download my program and follow my tutorials, or you can download the program compressed package and modify it directly.

Program download tool: http://www.wch.cn/download/WCHISPTool_Setup_exe.html

Download method:Qinheng MCU code download_wchisptool 3.2-CSDN blog

Program modification method:

Normal keyboard keys:

If you don't know the key value, check it here: Portal Online Obtain KeyCode Keyboard Key Code-KeyAscii Value Acquisition-KeyCode Value Online Acquisition Tool (jsons.cn)

Hint:

When printing the board, the lower base plate does not need to be colored, which can save costs and will not affect the display.

The top plate can be adjusted according to the picture you like.

Notice:

There are important components below. Don't buy the wrong ones, otherwise they won't be installed.

(1) Size of copper pillar

(2) The SMD crystal oscillator is purchased at 12M and is not marked on the schematic diagram.

(3) For the EC11 encoder, buy a 20mm plum blossom handle and 20-bit pulse, such as the following.

(4) Don't buy the wrong encoder hat. The one below is just right.

(5) Do not solder the BOOT buttons (only the buttons are not soldered), otherwise the shell cannot be installed after the buttons are welded. When downloading, just short-circuit the two contacts of the button and then power on to identify it.(6) When downloading the program, don't choose the wrong part of the software, choose P3.6, otherwise you will be in trouble next time you download the program.