Introduction - If you have any usage issues, please Google them yourself
Procedure Description: This example shows how to use the 8051 Port 1 connected to four seven-segment display, PORT 0, low 4, respectively to control the total of four seven-segment display yang, so that a total of four seven-segment display yang way of using the scan rotation display the number. This four seven-segment display will show a digital clock from PORT 2 of the P2.0 and P2.1 are connected to the two bounce button.* /