Introduction - If you have any usage issues, please Google them yourself
a) PC computer through the serial port to the microcontroller to send a 1 to 7 digital, SCM will receive digital echo sent back to the PC, and lit the corresponding number of LED lights (connected to PORTB small lamp), and then let the LED flashing Marquee form of cycle. b) the program can respond to new digital PC sent Marquee process. In other words, when the PC sends a new digital, single-chip can change the number of lit LED lights, LED lights and continue to be in the form of the Marquee control.