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FPGA LCD Display Implementation: Character and Image Rendering Character and Image Display Fundamentals In FPGA-based LCD display systems, character and image rendering requires understanding pixel matrix representation. A character can be represented as a 2D array where each element corresponds to a pixel point. For example, char[y][x] denot ...

Verilog Data Representation Verilog uses a standardized format for representing numbers: n'bv, where n is the bit width, 'b is the base (e.g., binary, decimal, hexadecimal), and v is the value. This format allows for precise control over how data is stored and interpreted. For instance, the declaration 8'hFF specifies an 8-bit hexadecimal numbe ...

According to IEEE standards, these directives are used to mark modules as cell modules, indicating they contain cell definitions. Some PLI routines utilize cell modules for applications like delay calculation. These directives can appear any where in the source code, but placing them outside module definitions is recommended. Practical usage ex ...

Directly reading button states to control devices like LEDs can lead to misinterpretation due to mechanical bouncing when buttons are pressed or released. This bouncing effect causes rapid state changes that may be incorrectly interpreted as multiple button presses. This section demonstrates how to implement debouncing algorithms using a button ...

SCCB Protocol Overview The SCCB (Serial Camera Control Bus) protocol is commonly used for configuring registers in camera modules, particularly those in the OV series. This protocol evolved from the I2C protocol and shares many similarities with it. A complete transmission in SCCB consists of either two phases (for read operations) or three pha ...

Digital Clock Functionality The design implements a digital clock module with reset and pause capabilities, featuring a 6-digit display for hundredths of seconds, seconds, and minutes. Module Structure Top-Level Module module dcmk(clk, clr, pause, seg1, seg2, com); input clk, clr; input pause; output [7:0] seg1, seg2, com; wire [3:0] m ...

Finite State Machine Fundamentals A Finite State Machine (FSM) is a deterministic behavioral model used to coordinate sequential operations, manage control signals, and enforce predefined transition rules within digital systems. At its core, an FSM consists of a finite set of states, input conditions, and output actions. Based on how outputs ar ...

Module Interface Overview The AXI4 Master interface consists of five distinct channels: Write Address (AW), Write Data (W), Write Response (B), Read Address (AR), and Read Data (R). Signals prefixed with M_AXI_ indicate the Master side of the interface. Specifically, AR_* signals belong to the Read Address channel, AW_* to the Write Address cha ...

Mathematical Background and Design Goals The Fast Fourier Transform (FFT) is an efficient algorithm to compute the Discrete Fourier Transform (DFT). For a sequence $x(n)$ of length $N$, the DFT is defined as: Module Interface Specification The top-level entity, named fft_top, features a standard streaming interface. The input and output data ...

When iterating on RTL, I keep the interface definition in a Markdown table and the implementation in Verilog. Manually keeping the two in sync is error-prone, so I wrote a pair of lightweight Python utilities that convert the Markdown table to a stub module and vice-versa. A third helper explodes the same table into an Excel sheet that the back ...