The aim of this application note is to show to scan the 4x4 matrix keypad multiplexed with a four 7-segment display. The software attached to this application note scans the pressed key and displays it on the multiplexed 7- segment LEDs. Thi

该源代码基于2代B+型树莓派，并利用两块8*8的点阵通过相应连接，在树莓派中执行该源代码，即能够使点阵显示字体。-The source code is based on the second generation Type B Raspberry Pi, and the use of two 8* 8 dot matrix through the corresponding connection, the implementation of the source code in raspberr