When writing and using spi, you need to use the high-level output signal of the GPIO3.21 pin.The input method in the hyperterminal is:
# cd /sys/class/gpio/sys/class/gpio# echo 117 export/sys/class/gp
[i=s]This post was last edited by Buzhulun on 2019-6-23 11:19[/i]I looked at the trial list and found that I was the only one who applied for CH554. Everyone was looking for the other two development
Operating System (RISC-V) : https://training.eeworld.com.cn/course/6015The operating system is the core system software responsible for managing various hardware and software resources in the computer