Waveshare e-Paper Driver Library

The arm_nnexample_nn_test is a CMSIS-DSP/NN library example designed for testing neural network functions on ARM Cortex-M3, Cortex-M4, and Cortex-M7 microcontrollers.

Note: This specific example configuration is intended for use with the uVision Simulator.

The arm_nnexample_nn_test is a CMSIS-DSP/NN library example designed for testing neural network implementations on ARM Cortex-M3, Cortex-M4, and Cortex-M7 microcontrollers.

Note that this specific example configuration is intended for use with the uVision Simulator.

The arm_nnexample_nn_test is a CMSIS-DSP/NN library example designed for testing neural network implementations on ARM Cortex-M3, Cortex-M4, and Cortex-M7 microcontrollers.

Note: This specific example is configured to run within the uVision Simulator environment.

The repository provides demo code for several hardware platforms:

• RaspberryPi_JetsonNano: Supports both C and Python implementations.
• Arduino:
  • Arduino UNO R3 (Note: Latest screens may not have example code for this model).
  • Arduino UNO R4.
• STM32:
  • STM32F103ZET6.

For additional documentation and information, visit the official Waveshare website: https://www.waveshare.com

This demo project is optimized for the following environment:

• OS: Ubuntu 20.04 Server_20220718
• Hardware: Sunrise X3 PI (routines verified on this platform)
• Module: e-paper Driver HAT

Library Installation: The system comes with built-in libraries required for these routines, so no additional library installation is necessary.

Understanding the project layout helps in locating drivers, configurations, and examples:

• Config/: Hardware interface layer (GPIO, Delay, Module Init/Exit).
• lib/GUI/: Image processing and drawing functions (GUI_Paint.c/.h).
• lib/Fonts/: ASCII and Chinese font definitions.
• lib/E-paper/: The core e-Paper driver functions.
• Examples/: Test programs demonstrating specific usage methods.

The project is organized into several functional layers:

• lib/Config/: Hardware interface layer. Contains definitions for data types, GPIO, and module lifecycle (DEV_Module_Init/Exit).
• lib/GUI/: Image processing and drawing functions. Located in GUI_Paint.c(.h), it provides tools for creating shapes, flipping/mirroring images, setting pixels, clearing the screen, and drawing text (English/Chinese), lines, circles, and bitmaps.
• lib/Fonts/: Font definitions for ASCII and Chinese characters.
• lib/e-paper/: The core e-Paper driver functions.
• Examples/: Test programs demonstrating how to use the library.

The project includes a GUI layer and font library for rendering content on the screen.

GUI_Paint (GUI_Paint.c/.h): Provides functions for drawing:

• Points
• Lines
• Rectangles
• Circles
• Filled shapes
• Text (using the provided fonts)

Fonts (Fonts/): Supported font sizes and dimensions:

Ascii Fonts:

• font8: 5x8
• font12: 7x12
• font16: 11x16
• font20: 14x20
• font24: 17x24

Chinese (CN) Fonts:

• font12CN: 16x21
• font24CN: 32x41

The GUI\ directory (via GUI_Paint.c/.h) provides functions for rendering content on the e-paper screen:

• Image Processing: Creating, flipping, and mirroring graphics; setting individual pixels; clearing the screen.
• Drawing primitives: Drawing points, lines, boxes, circles, and numbers.
• Text Rendering: Supports both English (Ascii) and Chinese characters.
• Bitmaps: Functions to display pre-defined bitmap images.
• Time Display: A common function for displaying time on the screen.

The GUI/ directory contains GUI_Paint.c and GUI_Paint.h. This module provides functions for drawing on the e-Paper screen. It supports:

• Drawing points, lines, and rectangles.
• Drawing circles and filled shapes.
• Rendering text and images.

Note that drawing operations are typically performed on a buffer before being sent to the e-Paper display.

The project provides several libraries for drawing and text rendering located in \lib\:

Image Processing (\lib\GUI\)

Found in GUI_Paint.c(.h), these functions allow for:

• Graphics Manipulation: Creating, flipping, mirroring, setting pixels, and clearing screens.
• Drawing: Drawing points, lines, boxes, circles, Chinese characters, English characters, and numbers.
• Display: Functions to display bitmaps and common time displays.

Fonts (\lib\Fonts\)

Available fonts include:

• Ascii: Font8 (5x8), Font12 (7x12), Font16 (11x16), Font20 (14x20), Font24 (17x24).
• Chinese: font12CN (16x21), font24CN (32x41).