This repository is a college activity for the Laboratório de Sistemas Digitais (LSD), from Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE). The mainly goal is to build a ultrasonic distance sensor, using a Ultrasonic Ranging Module HC-SR04 and the QB-FPGA200EP2C Starter Kit.

• Digital Electronics - A Practical Approach With VHDL, 9th Edition, Willian Kleitz
• FPGA Prototyping by VHDL Examples, Pong P. Chu, 2007

The modules were inspired in the following video, but with several changes:

• How to Implement VHDL design for a Range sensor on an FPGA