Introduction - If you have any usage issues, please Google them yourself
Hardware resources:
1, DS0 (connection in PF9)
2, serial port 1 (baud rate: 115200, PA9/PA10 connection on board USB to serial port chip CH340 above)
3 inch TFTLCD ALIENTEK, 2.8/3.5/4.3/7 module (via FSMC driver, FSMC_NE4 LCD chip select /A6 RS)
4, button KEY0 (PE4) /KEY1 (PE3)
5,24C02 (IIC is connected on top of PB8/PB9)