Introduction - If you have any usage issues, please Google them yourself
The purpose of the experiment: let users learn key applications commonly used in human-computer interaction. The experimental LED1, LED2, LED3 lights and buttons S1 peripherals. Using P10, P11 and P14 is port as output ports, the drive LED1/LED2/LED3 P01 port as an input port, accept the input of a key signal (high level signal) for the key.