Introduction - If you have any usage issues, please Google them yourself
Exercise I/O control, practice the purpose of a master MCU I/O port control method. Master the use of the Keil and Proteus. Practice reference routines, master the use of the Keil and Proteus FBI. Reference routines, master MCU I/O port control method. Draw the circuit, write a program, as a control port P1 port the 8 LED turns bright. 4. Draw the circuit, write a program, P1.0 to P1.6 port control LED P1.7 control the LED turn on and off (P1.7 access keys, when pressed LED lights, LED off on time.)