Introduction - If you have any usage issues, please Google them yourself
Button switch was calculated according to the number. Button switch K1 as a single-chip input signals, switch K1 to be in accordance with the number received by the P1 port of the 8 LED display. 8 LED can be seen as 8-bit binary number, brightest to 0, out for 1. Observed count LED can draw on the book in Appendix B, will convert a decimal number binary number read