To use CW32 to make a mechanical keyboard, the first step is to make a main control board that can be used for debugging and testing the software.
The main functional idea is to use CW32 to detect matrix keys, send the detection results to ch552 through uart, and then transmit them to the computer through ch552 to realize the triggering of the keys.
The actual picture is made using the first version of the PCB. The button next to the USB interface is missing a resistor. The latest version of the schematic and PCB has been corrected.
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