Hello everybody, i have built a custom PCB, that uses an ESP32 C6 WROOM 1.
I tried different components that use SPI communication and they work fine, but for some reason my e-paper doesn't display anything.
The screen is 7.5 inch e-paper 800x480 b/w
I use the library from Mr. @ZinggJM and his demo on github
I have different pins that i set up on my esp32:
EPD_BUSY = IO3
EPD_DC = IO5
EPD_CS = IO10
SCK = IO6
MOSI = IO7
EPD_RST = IO23
EPD_3V3 = IO20 this needs to be set to low in order to power up the EPD.
Here is what I get from my serial monitor:
And here is the code with the pins that I remapped:
// uncomment next line to use HSPI for EPD (and VSPI for SD), e.g. with Waveshare ESP32 Driver Board
#define USE_HSPI_FOR_EPD
// base class GxEPD2_GFX can be used to pass references or pointers to the display instance as parameter, uses ~1.2k more code
// enable or disable GxEPD2_GFX base class
#define ENABLE_GxEPD2_GFX 0
// uncomment next line to use class GFX of library GFX_Root instead of Adafruit_GFX
//#include <GFX.h>
// Note: if you use this with ENABLE_GxEPD2_GFX 1:
// uncomment it in GxEPD2_GFX.h too, or add #include <GFX.h> before any #include <GxEPD2_GFX.h>
#include <GxEPD2_BW.h>
#include <GxEPD2_3C.h>
#include <GxEPD2_4C.h>
#include <GxEPD2_7C.h>
#include <Fonts/FreeMonoBold9pt7b.h>
// select the display class (only one), matching the kind of display panel
#define GxEPD2_DISPLAY_CLASS GxEPD2_BW
#define GxEPD2_DRIVER_CLASS GxEPD2_750_T7 // GDEW075T7 800x480, EK79655 (GD7965), (WFT0583CZ61)
//#define GxEPD2_DRIVER_CLASS GxEPD2_750_GDEY075T7 // GDEY075T7 800x480, UC8179 (GD7965), (FPC-C001 20.08.20)
// somehow there should be an easier way to do this
#define GxEPD2_BW_IS_GxEPD2_BW true
#define GxEPD2_3C_IS_GxEPD2_3C true
#define GxEPD2_7C_IS_GxEPD2_7C true
#define GxEPD2_1248_IS_GxEPD2_1248 true
#define IS_GxEPD(c, x) (c##x)
#define IS_GxEPD2_BW(x) IS_GxEPD(GxEPD2_BW_IS_, x)
#define IS_GxEPD2_3C(x) IS_GxEPD(GxEPD2_3C_IS_, x)
#define IS_GxEPD2_7C(x) IS_GxEPD(GxEPD2_7C_IS_, x)
#define IS_GxEPD2_1248(x) IS_GxEPD(GxEPD2_1248_IS_, x)
#if defined(ESP32)
#define MAX_DISPLAY_BUFFER_SIZE 65536ul // e.g.
#if IS_GxEPD2_BW(GxEPD2_DISPLAY_CLASS)
#define MAX_HEIGHT(EPD) (EPD::HEIGHT <= MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8) ? EPD::HEIGHT : MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8))
#elif IS_GxEPD2_3C(GxEPD2_DISPLAY_CLASS)
#define MAX_HEIGHT(EPD) (EPD::HEIGHT <= (MAX_DISPLAY_BUFFER_SIZE / 2) / (EPD::WIDTH / 8) ? EPD::HEIGHT : (MAX_DISPLAY_BUFFER_SIZE / 2) / (EPD::WIDTH / 8))
#elif IS_GxEPD2_7C(GxEPD2_DISPLAY_CLASS)
#define MAX_HEIGHT(EPD) (EPD::HEIGHT <= (MAX_DISPLAY_BUFFER_SIZE) / (EPD::WIDTH / 2) ? EPD::HEIGHT : (MAX_DISPLAY_BUFFER_SIZE) / (EPD::WIDTH / 2))
#endif
GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=*/ 10, /*DC=*/ 5, /*RST=*/ 23, /*BUSY=*/ 3));
#endif
// alternately you can copy the constructor from GxEPD2_display_selection.h of GxEPD_Example to here
// and adapt it to the ESP32 Driver wiring, e.g.
//GxEPD2_BW<GxEPD2_154_D67, GxEPD2_154_D67::HEIGHT> display(GxEPD2_154_D67(/*CS=*/ 15, /*DC=*/ 27, /*RST=*/ 26, /*BUSY=*/ 25)); // GDEH0154D67
#include "bitmaps/Bitmaps640x384.h" // 7.5" b/w
#if defined(ESP32) && defined(USE_HSPI_FOR_EPD)
SPIClass hspi(HSPI);
#endif
void setup()
{
Serial.begin(115200);
Serial.println();
Serial.println("setup");
pinMode(20, OUTPUT);
digitalWrite(20, LOW);
delay(1000);
// *** special handling for Waveshare ESP32 Driver board *** //
// ********************************************************* //
#if defined(ESP32) && defined(USE_HSPI_FOR_EPD)
hspi.begin(6, 2, 7, 10); // remap hspi for EPD (swap pins)
display.epd2.selectSPI(hspi, SPISettings(4000000, MSBFIRST, SPI_MODE0));
#endif
// *** end of special handling for Waveshare ESP32 Driver board *** //
// **************************************************************** //
display.init(115200);
// first update should be full refresh
helloWorld();
delay(1000);
// partial refresh mode can be used to full screen,
// effective if display panel hasFastPartialUpdate
helloFullScreenPartialMode();
delay(1000);
helloArduino();
delay(1000);
helloEpaper();
delay(1000);
showFont("FreeMonoBold9pt7b", &FreeMonoBold9pt7b);
delay(1000);
drawBitmaps();
if (display.epd2.hasPartialUpdate)
{
showPartialUpdate();
delay(1000);
} // else // on GDEW0154Z04 only full update available, doesn't look nice
//drawCornerTest();
//showBox(16, 16, 48, 32, false);
//showBox(16, 56, 48, 32, true);
display.powerOff();
deepSleepTest();
Serial.println("setup done");
}
void loop()
{
}
//...rest of the functions that i didn't modify
Any help will be much appreciated. Thank you!
