This project consists of a custom-designed Printed Circuit Board (PCB) and Verilog code for an LCD keypad shield that can be connected to a PYNQ-Z2 FPGA development board and an Arduino.
The PYNQ-Z2 is a Zynq-7000 System on Chip (SoC) development board that includes a Xilinx FPGA, ARM Cortex-A9 processor, and a host of other peripherals. The board is compatible with the Arduino ecosystem and can be programmed using the PYNQ framework, which provides an easy-to-use Python API for working with the FPGA and other components.
The LCD keypad shield is a commonly used accessory for Arduino boards that provides a 16x2 character LCD and a keypad for user input. This project adapts the shield for use with the PYNQ-Z2 by designing a custom PCB that connects to the PYNQ-Z2's Arduino-compatible headers and includes level shifters for the LCD and keypad signals.
The PCB was designed using Altium Designer and includes the following features:
- Connection to PYNQ-Z2 Arduino-compatible headers
- Connection to LCD keypad shield headers
- Level shifters for LCD and keypad signals
- Power supply filtering and decoupling
The design files for the PCB are included in the pcb directory.
The Verilog code implements a simple interface between the PYNQ-Z2 and the LCD keypad shield. The interface supports the following operations:
- Initialize LCD display
- Write characters to LCD display
The code is designed to be easily integrated into other Verilog designs for the PYNQ-Z2.
The Verilog source files and a sample PYNQ project that uses the LCD keypad shield are included in the verilog directory.
To use the PCB, the user must first order the PCB from a PCB manufacturer and assemble the components according to the provided Bill of Materials (BOM). The assembled PCB can then be connected to the PYNQ-Z2 and the LCD keypad shield.
To use the Verilog code, the user must first include the source files in their Verilog project and instantiate the top-level module. The interface to the LCD keypad shield can then be accessed using the provided signals and operations.
This project is licensed under the MIT License. See the LICENSE file for details.