Description
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Support for GDEH029A1 / SSD1608 based ePaper modules in 4-wire SPI mode. Support for other controllers will be added later emulated 4-bit gray scale modeSPI displays oriented SPI driver library based on spi-master driverCombined DMA SPI transfer mode and direct SPI for maximal speed4-bit Grayscale mode or 1-bit b/w mode can be selected during runtimeSPI speeds up to 20 MHz are tested and works without problemsDemo application included which demonstrates most of the library features
Graphics drawing functions:
EPD_drawPixel Draw pixel at given x,y coordinatesEPD_drawLine Draw line between two pointsEPD_drawFastVLine, EPD_drawFastHLine Draw vertical or horizontal line of given lenghtEPD_drawLineByAngle Draw line on screen from (x,y) point at given angleEPD_drawRect, EPD_fillRect Draw rectangle on screen or fill given rectangular screen region with colorEPD_drawRoundRect, EPD_fillRoundRect Draw rectangle on screen or fill given rectangular screen region with color with rounded cornersEPD_drawCircle, EPD_fillCircle Draw or fill circle on screenEPD_drawEllipse, EPD_fillEllipse Draw or fill ellipse on screenEPD_drawTriangel, EPD_fillTriangle Draw or fill triangle on screenEPD_drawArc Draw circle arc on screen, from ~ to given angles, with given thickness. Can be outlined with different colorEPD_drawPolygon Draw poligon on screen with given number of sides (3~60). Can be outlined with different color and rotated by given angle.
Fonts:
fixed width and proportional fonts are supported; 8 fonts embededunlimited number of fonts from file7-segment vector font with variable width/height is included (only numbers and few characters)Proportional fonts can be used in fixed width mode.Related functions:EPD_setFont Set current font from one of embeded fonts or font fileEPD_getfontsize Returns current font height & width in pixels.EPD_getfontheight Returns current font height in pixels.set_7seg_font_atrib Set atributes for 7 segment vector fontgetFontCharacters Get all font's characters to buffer
String write function:
EPD_print Write text to display.Strings can be printed at any angle. Rotation of the displayed text depends on font_ratate variable (0~360)if font_transparent variable is set to 1, no background pixels will be printedIf the text does not fit the screen/window width it will be clipped ( if text_wrap=0 ), or continued on next line ( if text_wrap=1 )Two special characters are allowed in strings: r CR (0x0D), clears the display to EOL, n LF (ox0A), continues to the new line, x=0Special values can be entered for X position:CENTER centers the textRIGHT right justifies the text horizontalyLASTX continues from last X position; offset can be used: LASTX+nSpecial values can be entered for Y:CENTER centers the text verticalyBOTTOM bottom justifies the textLASTY continues from last Y position; offset can be used: LASTY+nEPD_getStringWidth Returns the string width in pixels based on current font characteristics. Useful for positioning strings on the screen.EPD_clearStringRect Fills the rectangle occupied by string with current background color
Images:
EPD_jpg_image Decodes and displays JPG imagesLimits:Baseline only. Progressive and Lossless JPEG format are not supported.Image size: Up to 65520 x 65520 pixelsColor space: YCbCr three components only. Gray scale image is not supported.Sampling factor: 4:4:4, 4:2:2 or 4:2:0.Can display the image from file or memory bufferImage can be scaled by factor 0 ~ 3 (1/1, 1/2, 1/4 or 1/8)Image is displayed from X,Y position on screen/window:X: image left position; constants CENTER & RIGHT can be used; negative value is acceptedY: image top position; constants CENTER & BOTTOM can be used; negative value is acceptedImage is converted to 4-bit Gray Scale mode
Other display functions:
EPD_fillScreen Fill the whole screen with black, white or gray scalecompile_font_file Function which compiles font c source file to font file which can be used in EPD_setFont() function to select external font. Created file have the same name as source file and extension .fnt
Package includes:
1 x T5 V2.4 ESP32 2.9 Inch screen
