2.13in single color e-paper cannot be displayed

[vaemc]

Hi Bodmer,

I tried to modify the example https://github.com/Bodmer/TFT_eSPI/blob/master/examples/ePaper/Floyd_Steinberg/Floyd_Steinberg.ino The screen does not respond after the code is uploaded successfully,I used a 2.13in e-paper

Here's where I modified it:

include

ePaper.Init(lut_full_update);

// Display grey-scale images on a Monchrome ePaper display using
// Floyd-Steinberg dithering
// https://en.wikipedia.org/wiki/Floyd%E2%80%93Steinberg_dithering

// Example created by Bodmer 31/3/18 for TFT_eSPI library: // https://github.com/Bodmer/TFT_eSPI // Select the ePaper setup in library's "User_Setup_Select.h" file

// This sketch supports Waveshare 2 colour ePaper displays // https://www.waveshare.com/product/modules/oleds-lcds/e-paper.htm

// Test images are in the Data folder with sketch (press Ctrl+k) // Upload using the Tools menu "ESP8266 Sketch Data Upload" option

/////////////////////////////////////////////////////////////////// // For ESP8266 connect as follows: // // Display 3.3V to NodeMCU 3V3 // // Display GND to NodeMCU GND // // // // Display GPIO NodeMCU pin // // BUSY 5 D1 // // RESET 4 D2 // // DC 0 D3 // // CS 2 D4 // // CLK 14 D5 // // D6 (MISO not connected to display) // // DIN 13 D7 // // // // Note: Pin allocations for the ePaper signals are defined in // // ePaper library's epdif.h file, above are the default pins // ///////////////////////////////////////////////////////////////////

// READ THIS READ THIS READ THIS READ THIS READ THIS READ THIS // Install the ePaper library for your own display size and type // from here: // https://github.com/Bodmer/EPD_Libraries

// The following is for the Waveshare 2.7" colour ePaper display // include <epd?in?.h> where ?.?? is screen size in inches

include // Screen specific library

Epd ePaper; // Create an instance ePaper

include // Graphics library and Sprite class

TFT_eSPI glc = TFT_eSPI(); // Invoke the graphics library class TFT_eSprite frame = TFT_eSprite(&glc); // Invoke the Sprite class for the image frame buffer

define INK COLORED // Black ink

define PAPER UNCOLORED // 'paper' background colour

uint16_t epd_width = EPD_WIDTH; // Set the initial values, these are swapped uint16_t epd_height = EPD_HEIGHT; // in different landscape/portrait rotations // so call frame.width() or frame.height() to get new values

define EPD_BUFFER 1 // Label for the black frame buffer 1

uint8_t* framePtr = NULL; // Pointer for the black frame buffer

include "EPD_Support.h" // Include sketch EPD support functions last!

int8_t limit = 5; // Limit the number of loops before halting //------------------------------------------------------------------------------------ // Setup //------------------------------------------------------------------------------------ void setup() {

Serial.begin(115200); // Used for messages

// Initialise the ePaper library if (ePaper.Init(lut_full_update) != 0) { Serial.print("ePaper init failed"); while (1) yield(); // Wait here until re-boot }

Serial.println("\r\n ePaper initialisation OK");

// Initialise the SPIFFS filing system if (!SPIFFS.begin()) { Serial.println("SPIFFS initialisation failed!"); while (1) yield(); // Stay here twiddling thumbs }

Serial.println(" SPIFFS initialisation OK");

frame.setColorDepth(1); // Must set the bits per pixel to 1 for ePaper displays // Set bit depth BEFORE creating Sprite, default is 16!

// Create a frame buffer in RAM of defined size and save the pointer to it // RAM needed is about (EPD_WIDTH EPD_HEIGHT)/8 , ~5000 bytes for 200 x 200 pixels // Note: always create the Sprite before setting the Sprite rotation framePtr = (uint8_t) frame.createSprite(EPD_WIDTH, EPD_HEIGHT);

Serial.println("\r\nInitialisation done.");

listFiles(); // List all the files in the SPIFFS }

//------------------------------------------------------------------------------------ // Loop //------------------------------------------------------------------------------------ void loop() {

frame.setRotation(random(4)); // Set the rotation to 0, 1, 2 or 3 ( 1 & 3 = landscape)

frame.fillSprite(PAPER);

// Draw 8 bit grey-scale bitmap using Floyd-Steinberg dithering at x,y // /File name x y //drawFSBmp("/TestCard.bmp", 0, 0); // 176 x 264 pixels

drawFSBmp("/Tiger.bmp", (frame.width()-176)/2, (frame.height()-234)/2); // 176 x 234 pixels

updateDisplay(); // Send image to display and refresh

delay(5000);

frame.fillSprite(PAPER); // Fill frame with white

// Draw circle in frame buffer (x, y, r, color) in center of screen frame.drawCircle(frame.width()/2, frame.height()/2, frame.width()/6, INK);

// Draw diagonal lines frame.drawLine(0 , 0, frame.width()-1, frame.height()-1, INK); frame.drawLine(0 , frame.height()-1, frame.width()-1, 0, INK);

updateDisplay(); // Send image to display and refresh

delay(3000);

// Run a rotation test rotateTest();

// Put screen to sleep to save power (if wanted) ePaper.Sleep();

if (--limit <= 0) while(1) yield(); // Wait here

delay(20000); // Wait here for 20s

// Wake up ePaper display so we can talk to it Serial.println("Waking up!"); ePaper.Init(lut_full_update);

} // end of loop()

//------------------------------------------------------------------------------------ // setRotation() actually rotates the drawing coordinates, not the whole display frame // buffer so we can use this to draw text at right angles or upside down //------------------------------------------------------------------------------------ void rotateTest(void) { //frame.fillSprite(PAPER); // Fill buffer with white to clear old graphics

// Draw some text in frame buffer frame.setTextFont(4); // Select font 4 frame.setTextColor(INK); // Set colour to ink frame.setTextDatum(TC_DATUM); // Middle centre text datum

frame.setRotation(0); // Set the display rotation to 0, 1, 2 or 3 ( 1 & 3 = landscape) epd_width = frame.width(); // Get the values for the current rotation epd_height = frame.height(); // epd_height is not used in this sketch

frame.drawString("Rotation 0", epd_width / 2, 10);

frame.setRotation(1); // Set the display rotation to 1 epd_width = frame.width(); // Get the values for the current rotation epd_height = frame.height(); // epd_height is not used in this sketch

frame.drawString("Rotation 1", epd_width / 2, 10);

frame.setRotation(2); // Set the display rotation to 2 epd_width = frame.width(); // Get the values for the current rotation epd_height = frame.height(); // epd_height is not used in this sketch

frame.drawString("Rotation 2", epd_width / 2, 10);

frame.setRotation(3); // Set the display rotation to 3 epd_width = frame.width(); // Get the values for the current rotation epd_height = frame.height(); // epd_height is not used in this sketch

frame.drawString("Rotation 3", epd_width / 2, 10);

Serial.println("Updating display"); updateDisplay(); // Update display }

[vaemc]

[Bodmer]

Run the Read_User_Setup diagnostic sketch and report the output here.

[vaemc]

Run the Read_User_Setup diagnostic sketch and report the output here.

Thank you for your reply，Here are the results of my run

[code] TFT_eSPI ver = 2.2.5 Processor = ESP8266 Frequency = 80MHz Voltage = 3.29V Transactions = No Interface = SPI SPI overlap = No

Display driver = 9488 Display width = 320 Display height = 480 TFT_CS = GPIO 8 TFT_DC = GPIO 4 TOUCH_CS = GPIO 2 Font GLCD loaded Font 2 loaded Font 4 loaded Font 6 loaded Font 7 loaded Font 8 loaded Smooth font enabled

Display SPI frequency = 27.00 Touch SPI frequency = 2.50 [/code]

[Bodmer]

The TFT_eSPI library is not configured correctly. Look at User_Setup_Select.h and ensure only setup 17 is selected.

The diagnostic output should look something like this:

TFT_eSPI ver = 2.2.18
Processor    = ESP8266
Frequency    = 80MHz
Voltage      = 0.00V
Transactions = No
Interface    = SPI
SPI overlap  = No

Display driver = ePaper

Font GLCD   loaded
Font 2      loaded
Font 4      loaded
Font 6      loaded
Font 7      loaded
Font 8      loaded
Smooth font enabled

Display SPI frequency = 20.00

[vaemc]

The TFT_eSPI library is not configured correctly. Look at User_Setup_Select.h and ensure only setup 17 is selected.

The diagnostic output should look something like this:

TFT_eSPI ver = 2.2.18
Processor    = ESP8266
Frequency    = 80MHz
Voltage      = 0.00V
Transactions = No
Interface    = SPI
SPI overlap  = No

Display driver = ePaper

Font GLCD   loaded
Font 2      loaded
Font 4      loaded
Font 6      loaded
Font 7      loaded
Font 8      loaded
Smooth font enabled

Display SPI frequency = 20.00

When I selected Step 17, Epaper still didn't work

https://github.com/Bodmer/TFT_eSPI/blob/master/examples/ePaper/Floyd_Steinberg/EPD_Support.h#L98

Then add a line "ePaper.DisplayFrame();" at the end and epaper will start working

Thank you so much for your help! This is really a great project!

[Bodmer]

Good to hear. I have opened this as your testing indicates some adaption is needed to operate with that display.

[vaemc]

@Bodmer Hi I want to ask what tool you used to generate the bmp file for this image,I tried a lot of tools but it can’t be displayed

[vaemc]

[Bodmer]

Save as an 8 bit grey scale BMP format file. Probably any free paint program can do this.

[Bodmer]

Added, thanks.