Watchdog timer verilog RTL code

看门狗程序设计，使用verilog HDL语言编写-Watchdog program design, using verilog HDL language

基于EPM1270F256实现的4路看门狗控制逻辑，实现了滤波、延时、复位功能。-Based on EPM1270F256 4 road guard dog control logic, to realize the function of filtering, time delay and reset.