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raspberrypisig / Claude2epaper.cpp
Created September 21, 2025 09:05
#include <Arduino.h>
#include <SPI.h>
#define BUSY_PIN 4
#define RESET_PIN 21
#define DC_PIN 22
// Display dimensions
#define EPD_WIDTH 128
#define EPD_HEIGHT 296
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raspberrypisig / claude-waveshare.cpp
Created September 21, 2025 08:32
#include <Arduino.h>
#include <SPI.h>
#define BUSY_PIN 4
#define RESET_PIN 21
#define DC_PIN 22
// Display dimensions
#define EPD_WIDTH 128
#define EPD_HEIGHT 296
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raspberrypisig / all.c
Last active September 21, 2025 04:34
unsigned char ucDataBlock[1983] = {
// Offset 0x00000000 to 0x000007BE
0x12, 0x01, 0x27, 0x01, 0x00, 0x11, 0x03, 0x44, 0x00, 0x0F, 0x45, 0x00,
0x00, 0x27, 0x01, 0x21, 0x00, 0x80, 0x4E, 0x00, 0x4F, 0x00, 0x00, 0x24,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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raspberrypisig / Hmm.md
Created September 20, 2025 20:50

Tiny hardware detail check first: you’re using the ESP32 with Arduino framework, and you want to send raw bytes over SPI. You have a DC pin (Data/Command pin) that determines whether the bytes should be understood as command or data by the peripheral. Conventionally, DC=0 → command and DC=1 → data. Correct?

Here’s a neat, reusable way to implement your two functions:

#include <SPI.h>

#define DC_PIN  21   // Change to your actual DC pin number
#define CS_PIN   5   // Chip select, change to your wiring
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raspberrypisig / Good.md
Created September 20, 2025 19:44

For the Waveshare 2.9" e-paper display v2, after initialization, you'll need to send several commands to turn on a pixel at position (0,0). Here's the sequence of raw bytes:

1. Set RAM X Address Start/End Position

0x44, 0x00, 0x0F  // Command 0x44, X start=0, X end=15 (128 pixels / 8 = 16 bytes)

2. Set RAM Y Address Start/End Position

0x45, 0x00, 0x00, 0x27, 0x01  // Command 0x45, Y start=0x0000, Y end=0x0127 (295 pixels)
@raspberrypisig
raspberrypisig / Raw.md
Last active September 20, 2025 19:39

https://files.waveshare.com/upload/7/79/2.9inch-e-paper-v2-specification.pdf

Sending raw SPI data to an e-paper display requires a precise sequence of commands and data bytes. Below is a detailed breakdown of the raw byte stream needed to draw a 5x5 black square at the (0,0) coordinate on a Waveshare 2.9-inch V2 e-paper display.

E-Paper Display Communication Principles

Communication with the display via SPI involves these key signals:

  • CS (Chip Select): Must be pulled low to start an SPI transaction.
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raspberrypisig / README.md
Last active September 20, 2025 15:08
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raspberrypisig / Epaper.go.md
Last active September 20, 2025 18:35
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raspberrypisig / Shiki.html
Created September 19, 2025 02:11
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Alpine.js Style Code Highlighting with Shiki</title>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
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raspberrypisig / Freecad-view section.macro.py
Last active September 18, 2025 21:09
import FreeCAD
import FreeCADGui
from PySide import QtCore
class SketchObserver:
def __init__(self):
self.original_transparency = None
self.target_transparency = 70 # Set desired transparency (0-100, higher is more transparent)
def slotStartEditing(self, doc, obj_name):