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Firmware download
RP2340 method of downloading firmware library in windows: After connecting the computer, press the BOOT button and the RESET button at the same time, first release the RESET button and then release the BOOT button, and a removable disk will appear on the computer, so copy the firmware library into it.
Program download
working procedure
1. The 1.led lights up one by one.
2. When the key A is pressed, the first horizontal row on the top will light up.
3. When the key B is pressed, a vertical row near the key B lights