E-paper 5.565 7-color ACeP display and Teensy 4.0

Projects Networking, Protocols, and Devices
1

Does anyone know if the teensy 4.0 compatible is with E-paper waveshare 5.565 7-color ACeP display?
I use the arduino library GxEPD2 with al lot of examples but not one is working
If somone have for my a sample code that I can use ore what I have to do to get it working

error log of arduino IDE
D:\VS2026\source\repos\HelloWorld\HelloWorld.ino: In function 'void setup()':
D:\VS2026\source\repos\HelloWorld\HelloWorld.ino:52:5: error: 'display' was not declared in this scope; did you mean 'delay'?
52 | display.init(115200, true, 2, false); // USE THIS for Waveshare boards with "clever" reset circuit, 2ms reset pulse
| ^~~~~~~
| delay
D:\VS2026\source\repos\HelloWorld\HelloWorld.ino: In function 'void helloWorld()':
D:\VS2026\source\repos\HelloWorld\HelloWorld.ino:61:5: error: 'display' was not declared in this scope; did you mean 'delay'?
61 | display.setRotation(1);
| ^~~~~~~
| delay
exit status 1
Compilation error: 'display' was not declared in this scope; did you mean 'delay'?

thanks anyway

2

My code from the GxEPD2 library



// GxEPD2_HelloWorld.ino by Jean-Marc Zingg

//

// Display Library example for SPI e-paper panels from Dalian Good Display and boards from Waveshare.

// Requires HW SPI and Adafruit_GFX. Caution: the e-paper panels require 3.3V supply AND data lines!

//

// Display Library based on Demo Example from Good Display: 


//

// Author: Jean-Marc Zingg
//
// Version: see library.properties
//
// Library: 

// Supporting Arduino Forum Topics (closed, read only):
// Good Display ePaper for Arduino: 
// Waveshare e-paper displays with SPI: 
//
// Add new topics in for new questions and issues
// see GxEPD2_wiring_examples.h for wiring suggestions and examples
// if you use a different wiring, you need to adapt the constructor parameters!
// uncomment next line to use class GFX of library GFX_Root instead of Adafruit_GFX

//#include <GFX.h>

#include <GxEPD2.h>
#include <GxEPD2_7C.h>
#include <Fonts/FreeMonoBold9pt7b.h>

// select the display class and display driver class in the following file (new style):
#include <sys/_stdint.h>

// or select the display constructor line in one of the following files (old style):

//#include "GxEPD2_display_selection.h"
//#include "GxEPD2_display_selection_added.h"

// alternately you can copy the constructor from GxEPD2_display_selection.h or GxEPD2_display_selection_added.h to here

// e.g. for Wemos D1 mini:

//GxEPD2_BW<GxEPD2_154_D67, GxEPD2_154_D67::HEIGHT> display(GxEPD2_154_D67(/*CS=D8*/ SS, /*DC=D3*/ 0, /*RST=D4*/ 2, /*BUSY=D2*/ 4)); // GDEH0154D67

// for handling alternative SPI pins (ESP32, RP2040) see example GxEPD2_Example.ino

void setup()

{
    //display.init(115200); // default 10ms reset pulse, e.g. for bare panels with DESPI-C02

    display.init(115200, true, 2, false); // USE THIS for Waveshare boards with "clever" reset circuit, 2ms reset pulse

    helloWorld();

    display.hibernate();
}

const char HelloWorld[] = "Hello World!";

void helloWorld()

{
    display.setRotation(1);
    display.setFont(&FreeMonoBold9pt7b);
    display.setTextColor(GxEPD_BLACK);
    int16_t tbx, tby; uint16_t tbw, tbh;
    display.getTextBounds(HelloWorld, 0, 0, &tbx, &tby, &tbw, &tbh);
    // center the bounding box by transposition of the origin:

    uint16_t x = ((display.width() - tbw) / 2) - tbx;
    uint16_t y = ((display.height() - tbh) / 2) - tby;
    display.setFullWindow();
    display.firstPage();
    do
    {

        display.fillScreen(GxEPD_WHITE);
        display.setCursor(x, y);
        display.print(HelloWorld);
    } while (display.nextPage());
}

void loop() {};