Скачать или смотреть #6 How to Generate a Slow Clock on an FPGA Board? | Verilog | Step-by-Step Instructions

Learn how to generate a slow clock on FPGA board. In this video we are using Basys 3 Board.

From your experience watching:    • #7 Four-bit Adder Implementation on an FPG...  , all 4-digit of 7-segment display the same number. This is because all of their inputs a~g are tied together. We can turn each individually off by set the AN0 or AN1or AN2 or AN3 to 1. Then how can we display 4 different numbers on this display?
The idea is to “trick your eyes”. You will display one digit at one LED for a short period of time,
by turning on only 1 LED and turn off the other 3 LEDs. Then you repeat for the next digit. If
you do this fast enough, human eyes cannot catch the on/off switching activities. The following
information is extracted from the Basys 3 reference manual on page 16.
In order for each of the four digits to appear bright and continuously illuminated, all four digits should be driven once every 1 to 16ms, for a refresh frequency of 1KHz to 60Hz. For example, in a 60Hz refresh scheme, the entire display would be refreshed once every 16ms, and each digit would be illuminated for ¼ of the refresh cycle, or 4ms.

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