⚡ VHDL-Codes

A clean collection of beginner-friendly VHDL programs along with their testbenches. This repository is perfect for students and learners who want to understand digital logic design, simulation, and waveform analysis using GHDL and GTKWave.

---

⭐ Highlights

• ✔️ Simple, readable, and well-structured VHDL codes
• ✔️ Testbenches included for every module
• ✔️ Great for university labs & digital logic learning
• ✔️ Works on any simulator supporting VHDL-93
• ✔️ Perfect starting point for FPGA and hardware design enthusiasts

---

▶️ Running the Code (GHDL + GTKWave)

1. Analyze (compile) the design

ghdl -a and_gate.vhd

2. Analyze the testbench

ghdl -a tb_and_gate.vhd

3. Elaborate

ghdl -e tb_and_gate

4. Run simulation

ghdl -r tb_and_gate --vcd=and_gate.vcd

5. View waveform

gtkwave and_gate.vcd

---

📸 GTKWave Output

You can upload your waveform images here to showcase the simulation result:

AND Gate Output

Other Gate Outputs

---

📘 Included Concepts

• AND, OR, NOT, NAND, NOR gates
• 2:1 Multiplexer
• Writing and understanding testbenches
• Basic waveform inspection
• Digital logic behavior in simulation

---

🤝 Contribution

Want to add more VHDL modules or testbenches? Feel free to fork the repo, improve the code, and open a pull request!

---

© Copyright

© 2025 Prabhat-amgain All rights reserved. This repository is owned and maintained by Prabhat Amgain.

---

📜 License

This project is open-source and released under the MIT License.

---