单片机驱动4位数码管实现个十百千万循环计数。有的数码管不亮是因为硬件的问题。可能是硬件功率太大了。-Microcontroller to drive 4 digital tube ten Millions of cycle counting. Some digital tube does not shine because of hardware problems. May be hardware too much power.

基于verilog 的按键计数程序，约束文件对应的是BASYS2 的 FPGA开发板，注意数码管对应的管脚分配-Press count program based on Verilog