[font=微软雅黑][size=4]This is also the first time I use NXP chips, and I have just started to configure GPIO. I can feel that compared with ST, NXP's GPIO design is more complicated, but the configuratio
Now there are three 485 devices. The slave device has matching resistors that pull up and down 4.7K terminal resistors 120R. The distance is no more than 1 meter. The master device pulls up and down t