Version 3.0.9

- fixed BMP handling, e.g. for BMPs created by ImageMagick
- see also Arduino Forum Topic https://forum.arduino.cc/index.php?topic=642343.0
- added support for GDEW075T7 7.5" b/w 800x480
- GDEW075T7 has differential update (1.6s) using a charge balancing waveform
- added "fast partial update" (differential update) for GDEW0371W7 3.7" b/w 240x416
- improved differential update waveform for GDEW026T0 2.6" b/w 152x256
- fixed init code & improved differential update for GDEW042T2 4.2" b/w 300x400
- note that all differential refresh waveforms are a compromise (ghosting, big font use)
- parameters for differential waveform for these display can easily be changed for experimenting
- GDEW042T2 would have greyed background without sustain phase
- GDEW042T2 needs multiple full refreshes after extended use of partial updates

README.md

@@ -23,9 +23,11 @@ A simple E-Paper display library with common base class and separate IO class fo
 
 ### The E-Paper display base class is a subclass of Adafruit_GFX, to have graphics and text rendering.
 
-- It needs up to 30kB available RAM to buffer the black/white image for the SPI displays, double for 3-color.
-- ESP8266, ESP32 , STM32 systems,  Arduino Due e.g.  have enough free RAM for full graphics buffer.
-- Paged Drawing is available to cope with RAM restriction on AVR processors.
+- It needs up to 15kB available RAM to buffer the black/white image for the SPI displays, 
+- double for 3-color, for e-papers up to 4.2" (300 * 400 / 8, 2 * 300 * 400 / 8).
+- ESP8266, ESP32 , STM32 systems, Arduino Due e.g. have enough free RAM for full graphics buffer.
+- It needs more RAM for e-paper displays above the 4.2".
+- Paged Drawing is available to cope with RAM restriction on AVR processors or for big displays.
 
 ### Supporting Arduino Forum Topics:
 
@@ -52,6 +54,7 @@ A simple E-Paper display library with common base class and separate IO class fo
 - GDEW042Z15     4.2" b/w/r
 - GDEW0583T7     5.83" b/w
 - GDEW075T8      7.5" b/w
+- GDEW075T7      7.5" b/w 800x480
 - GDEW075Z09     7.5" b/w/r
 - GDEW075Z08     7.5" b/w/r 800x480
 #### Supported SPI e-paper panels & boards from Waveshare: compare with Good Display, same panel
@@ -62,7 +65,19 @@ A simple E-Paper display library with common base class and separate IO class fo
 
 ### for pin mapping suggestions see ConnectingHardware.md
 
-### Version 3.0.8
+### Version 3.0.9
+- fixed BMP handling, e.g. for BMPs created by ImageMagick
+- see also Arduino Forum Topic https://forum.arduino.cc/index.php?topic=642343.0
+- added support for GDEW075T7 7.5" b/w 800x480
+- GDEW075T7 has differential update (1.6s) using a charge balancing waveform
+- added "fast partial update" (differential update) for GDEW0371W7 3.7" b/w 240x416
+- improved differential update waveform for GDEW026T0 2.6" b/w 152x256
+- fixed init code & improved differential update for GDEW042T2 4.2" b/w 300x400
+- note that all differential refresh waveforms are a compromise (ghosting, big font use)
+- parameters for differential waveform for these display can easily be changed for experimenting
+- GDEW042T2 would have greyed background without sustain phase
+- GDEW042T2 needs multiple full refreshes after extended use of partial updates
+#### Version 3.0.8
 - added support for GDEH0213B73 2.13" b/w, replacement for GDE0213B1, GDEH0213B72
 - added support for GDEW026T0 2.6" b/w 152x256
 - added support for GDEW0371W7 3.7" b/w 240x416

examples/GxEPD_Example/GxEPD_Example.ino

@@ -56,11 +56,12 @@
 //#include <GxGDEW026T0/GxGDEW026T0.h>      // 2.6" b/w
 //#include <GxGDEW027C44/GxGDEW027C44.h>    // 2.7" b/w/r
 //#include <GxGDEW027W3/GxGDEW027W3.h>      // 2.7" b/w
-//#include <GxGDEW0371W7/GxGDEW0371W7.h>      // 3.7" b/w
+//#include <GxGDEW0371W7/GxGDEW0371W7.h>    // 3.7" b/w
 //#include <GxGDEW042T2/GxGDEW042T2.h>      // 4.2" b/w
 //#include <GxGDEW042Z15/GxGDEW042Z15.h>    // 4.2" b/w/r
 //#include <GxGDEW0583T7/GxGDEW0583T7.h>    // 5.83" b/w
 //#include <GxGDEW075T8/GxGDEW075T8.h>      // 7.5" b/w
+//#include <GxGDEW075T7/GxGDEW075T7.h>      // 7.5" b/w 800x480
 //#include <GxGDEW075Z09/GxGDEW075Z09.h>    // 7.5" b/w/r
 //#include <GxGDEW075Z08/GxGDEW075Z08.h>    // 7.5" b/w/r 800x480
 
@@ -85,6 +86,9 @@ GxIO_Class io(SPI, /*CS=D8*/ SS, /*DC=D3*/ 0, /*RST=D4*/ 2); // arbitrary select
 GxEPD_Class display(io, /*RST=D4*/ 2, /*BUSY=D2*/ 4); // default selection of D4(=2), D2(=4)
 // Heltec E-Paper 1.54" b/w without RST, BUSY
 //GxEPD_Class display(io, /*RST=D4*/ -1, /*BUSY=D2*/ -1); // no RST, no BUSY
+// Waveshare e-Paper ESP8266 Driver Board
+//GxIO_Class io(SPI, 15, 4, 5); 
+//GxEPD_Class display(io, 5, 16); 
 
 #elif defined(ESP32)
 
@@ -450,7 +454,7 @@ void showBitmapExample()
 void showBitmapExample()
 {
 #if defined(__AVR)
-  //display.drawBitmap(BitmapExample1, sizeof(BitmapExample1));
+  display.drawBitmap(BitmapExample1, sizeof(BitmapExample1));
 #else
   display.drawExampleBitmap(BitmapExample1, sizeof(BitmapExample1));
   delay(2000);
@@ -539,6 +543,27 @@ void showBitmapExample()
 }
 #endif
 
+#if defined(_GxGDEW075T7_H_)
+void showBitmapExample()
+{
+#if defined(__AVR)
+  display.drawExampleBitmap(BitmapExample1, sizeof(BitmapExample1));
+#else
+  display.drawExampleBitmap(BitmapExample1, sizeof(BitmapExample1));
+  delay(2000);
+  display.drawExampleBitmap(BitmapExample2, sizeof(BitmapExample2));
+  delay(5000);
+  display.drawExampleBitmap(BitmapExample3, sizeof(BitmapExample1));
+  delay(2000);
+  display.drawExampleBitmap(BitmapExample4, sizeof(BitmapExample2));
+  delay(5000);
+  display.fillScreen(GxEPD_WHITE);
+  display.drawExampleBitmap(BitmapExample1, 0, 0, GxEPD_WIDTH, GxEPD_HEIGHT, GxEPD_BLACK);
+  display.update();
+#endif
+}
+#endif
+
 #if defined(_GxGDEW075Z08_H_)
 #define HAS_RED_COLOR
 void showBitmapExample()

examples/GxEPD_SD_Example/GxEPD_SD_Example.ino

@@ -74,20 +74,28 @@ SdFat SD;
 #include <GxEPD.h>
 
 // select the display class to use, only one
-#include <GxGDEP015OC1/GxGDEP015OC1.h>    // 1.54" b/w
+//#include <GxGDEP015OC1/GxGDEP015OC1.h>    // 1.54" b/w
 //#include <GxGDEW0154Z04/GxGDEW0154Z04.h>  // 1.54" b/w/r 200x200
 //#include <GxGDEW0154Z17/GxGDEW0154Z17.h>  // 1.54" b/w/r 152x152
+//#include <GxGDEW0213I5F/GxGDEW0213I5F.h>  // 2.13" b/w 104x212 flexible
 //#include <GxGDE0213B1/GxGDE0213B1.h>      // 2.13" b/w
+//#include <GxGDEH0213B72/GxGDEH0213B72.h>  // 2.13" b/w new panel
+//#include <GxGDEH0213B73/GxGDEH0213B73.h>  // 2.13" b/w newer panel
 //#include <GxGDEW0213Z16/GxGDEW0213Z16.h>  // 2.13" b/w/r
 //#include <GxGDEH029A1/GxGDEH029A1.h>      // 2.9" b/w
+//#include <GxGDEW029T5/GxGDEW029T5.h>      // 2.9" b/w IL0373
 //#include <GxGDEW029Z10/GxGDEW029Z10.h>    // 2.9" b/w/r
+//#include <GxGDEW026T0/GxGDEW026T0.h>      // 2.6" b/w
 //#include <GxGDEW027C44/GxGDEW027C44.h>    // 2.7" b/w/r
 //#include <GxGDEW027W3/GxGDEW027W3.h>      // 2.7" b/w
+//#include <GxGDEW0371W7/GxGDEW0371W7.h>    // 3.7" b/w
 //#include <GxGDEW042T2/GxGDEW042T2.h>      // 4.2" b/w
 //#include <GxGDEW042Z15/GxGDEW042Z15.h>    // 4.2" b/w/r
 //#include <GxGDEW0583T7/GxGDEW0583T7.h>    // 5.83" b/w
 //#include <GxGDEW075T8/GxGDEW075T8.h>      // 7.5" b/w
+//#include <GxGDEW075T7/GxGDEW075T7.h>      // 7.5" b/w 800x480
 //#include <GxGDEW075Z09/GxGDEW075Z09.h>    // 7.5" b/w/r
+//#include <GxGDEW075Z08/GxGDEW075Z08.h>    // 7.5" b/w/r 800x480
 
 #include <GxIO/GxIO_SPI/GxIO_SPI.h>
 #include <GxIO/GxIO.h>
@@ -330,7 +338,8 @@ void drawBitmapFrom_SD_ToBuffer(const char *filename, int16_t x, int16_t y, bool
       if (depth <= 8)
       {
         if (depth < 8) bitmask >>= depth;
-        file.seekSet(54); //palette is always @ 54
+        //file.seekSet(54); //palette is always @ 54
+        file.seekSet(imageOffset - (4 << depth)); // 54 for regular, diff for colorsimportant
         for (uint16_t pn = 0; pn < (1 << depth); pn++)
         {
           blue  = file.read();
@@ -488,6 +497,3 @@ uint32_t read32(SdFile& f)
   ((uint8_t *)&result)[3] = f.read(); // MSB
   return result;
 }
-
-
-

examples/GxEPD_WiFi_Example/GxEPD_WiFi_Example.ino

@@ -52,17 +52,22 @@
 //#include <GxGDEW0213I5F/GxGDEW0213I5F.h>  // 2.13" b/w 104x212 flexible
 //#include <GxGDE0213B1/GxGDE0213B1.h>      // 2.13" b/w
 //#include <GxGDEH0213B72/GxGDEH0213B72.h>  // 2.13" b/w new panel
+//#include <GxGDEH0213B73/GxGDEH0213B73.h>  // 2.13" b/w newer panel
 //#include <GxGDEW0213Z16/GxGDEW0213Z16.h>  // 2.13" b/w/r
 //#include <GxGDEH029A1/GxGDEH029A1.h>      // 2.9" b/w
 //#include <GxGDEW029T5/GxGDEW029T5.h>      // 2.9" b/w IL0373
 //#include <GxGDEW029Z10/GxGDEW029Z10.h>    // 2.9" b/w/r
+//#include <GxGDEW026T0/GxGDEW026T0.h>      // 2.6" b/w
 //#include <GxGDEW027C44/GxGDEW027C44.h>    // 2.7" b/w/r
 //#include <GxGDEW027W3/GxGDEW027W3.h>      // 2.7" b/w
+//#include <GxGDEW0371W7/GxGDEW0371W7.h>    // 3.7" b/w
 //#include <GxGDEW042T2/GxGDEW042T2.h>      // 4.2" b/w
 //#include <GxGDEW042Z15/GxGDEW042Z15.h>    // 4.2" b/w/r
 //#include <GxGDEW0583T7/GxGDEW0583T7.h>    // 5.83" b/w
 //#include <GxGDEW075T8/GxGDEW075T8.h>      // 7.5" b/w
+//#include <GxGDEW075T7/GxGDEW075T7.h>      // 7.5" b/w 800x480
 //#include <GxGDEW075Z09/GxGDEW075Z09.h>    // 7.5" b/w/r
+//#include <GxGDEW075Z08/GxGDEW075Z08.h>    // 7.5" b/w/r 800x480
 
 #include <GxIO/GxIO_SPI/GxIO_SPI.h>
 #include <GxIO/GxIO.h>
@@ -327,7 +332,8 @@ void drawBitmapFrom_HTTP_ToBuffer(const char* host, const char* path, const char
       if (depth <= 8)
       {
         if (depth < 8) bitmask >>= depth;
-        bytes_read += skip(client, 54 - bytes_read); //palette is always @ 54
+        //bytes_read += skip(client, 54 - bytes_read); //palette is always @ 54
+        bytes_read += skip(client, imageOffset - (4 << depth) - bytes_read); // 54 for regular, diff for colorsimportant
         for (uint16_t pn = 0; pn < (1 << depth); pn++)
         {
           blue  = client.read();
@@ -569,7 +575,8 @@ void drawBitmapFrom_HTTPS_ToBuffer(const char* host, const char* path, const cha
       if (depth <= 8)
       {
         if (depth < 8) bitmask >>= depth;
-        bytes_read += skip(client, 54 - bytes_read); //palette is always @ 54
+        //bytes_read += skip(client, 54 - bytes_read); //palette is always @ 54
+        bytes_read += skip(client, imageOffset - (4 << depth) - bytes_read); // 54 for regular, diff for colorsimportant
         for (uint16_t pn = 0; pn < (1 << depth); pn++)
         {
           blue  = client.read();

examples/PartialUpdateExample/PartialUpdateExample.ino

@@ -47,8 +47,9 @@
 //#include <GxGDEW029T5/GxGDEW029T5.h>      // 2.9" b/w IL0373
 //#include <GxGDEW026T0/GxGDEW026T0.h>      // 2.6" b/w
 //#include <GxGDEW027W3/GxGDEW027W3.h>      // 2.7" b/w
-//#include <GxGDEW0371W7/GxGDEW0371W7.h>      // 3.7" b/w
+//#include <GxGDEW0371W7/GxGDEW0371W7.h>    // 3.7" b/w
 //#include <GxGDEW042T2/GxGDEW042T2.h>      // 4.2" b/w
+//#include <GxGDEW075T7/GxGDEW075T7.h>      // 7.5" b/w 800x480
 // these displays do not fully support partial update
 //#include <GxGDEW0154Z17/GxGDEW0154Z17.h>  // 1.54" b/w/r 152x152
 //#include <GxGDEW0213Z16/GxGDEW0213Z16.h>  // 2.13" b/w/r

library.properties

@@ -1,5 +1,5 @@
 name=GxEPD
-version=3.0.8
+version=3.0.9
 author=Jean-Marc Zingg
 maintainer=Jean-Marc Zingg
 sentence=Display Library for SPI e-paper panels from Dalian Good Display and boards from Waveshare.