I used this development board a long time ago and it seemed to be fine. I also did the serial port experiment. But when I used it again today, I found such a serious problem. [/color] [color=#252525]T
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[i=s]This post was last edited by jinglixixi on 2020-12-25 18:00[/i]The previous article introduced using STM32L452RE to drive the OLED screen, but its screen is relatively small. This time, it will b