Learn the first routine of FPGA

4 position LED Flashing lamp design

See here for the specific process ：
Youdao cloud notes ,led Light flashing

First LED1 dark 1 second , Then light up 1 Darken in seconds ; next LED2 dark 1 second , bright 2 Darken in seconds ; And then LED3 dark 1 second , bright 3 Darken in seconds ; Last LED4 dark 1 second , bright 4 Darken in seconds ;

1、 Design objectives

2、 The top design

3、 Signal design

4、 Signal definition

5、 Construction of simulation platform

6、 Simulation oscillogram

The main reference is teacher mingdeyang's tutorial