Seeedstudio e-paper shield

Official Hardware Mega Due
1

I am trying to use Seeedstudio e-paper shield( Small e-Paper Shield | Seeed Studio Wiki ) with an Arduino Due.
It works fine with UNO and it is a 3,3v & 5v shield. When I upload the code (just standard example code) it has no uploading issues but the e-paper seems to hang. I have googled it and read a bunch of forums and found fixes for other e-papers, but none for this one. This is the first time working with Due, so I have no experience.

Anyone has any idea what I could do to fix it?
Possibly convert the library from avr to arm?

2

I just converted the seeedstudio e-paper libraries today.
Basically, you want to put in a header directive to wipe out any PROGMEM commands, and to add the DUE's processor to the if-defines.
Sort of like this:

#if defined(__MSP430_CPU__) || defined(__SAM3X8E__)
#define PROGMEM
#else
#include <avr/pgmspace.h>
#endif

// if more SRAM available (8 kBytes)
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)|| defined(__SAM3X8E__)
#define EPD_ENABLE_EXTRA_SRAM 1
#endif

I have a few more things to work out (such as the refresh rate being horribly slow) and then I'll upload it somewhere for sharing.

PS. Try the image flash sketch; that one worked for me with no changes.

3

I rewrote this thing a long time ago for a project because it was incredibly SRAM consuming and slow.
The rewritten version does not support chinese charaters and I haven't tested if it can even render images but it's definitely running fine for drawing shapes and writing Text on an Arduino Due.

In case you're intereseted to try it: GitHub - cybrox/Seeedstudio_ePaper_refactored: A small, fast version of the seeed studio ePaper library tested on the Arduino MEGA and even working on the Arduino DUE!
Might also be interesting to compare both versions to find out what makes the original so horribly slow with the Arduino Due.

4

Dear ThesQuid and cbrx,

I am using http://www.seeedstudio.com/depot/Small-epaper-Shield-V2-p-2462.html

I tried the libraries, but its not working for Mega 2560

5

I made a new fork for works with Arduino Due, made changes to include "defined(SAM3X8E)" and changed some delays from 250ms to 5ms, I tested and it got some speed up to library.

You need edit .h and .cpp files where:

find
#if defined(AVR_ATmega1280) || defined(AVR_ATmega2560)
change to
#if defined(AVR_ATmega1280) || defined(AVR_ATmega2560)|| defined(SAM3X8E)

find
#if defined(MSP430_CPU)
change to
#if defined(MSP430_CPU) || defined(SAM3X8E)

All Delay_ms(XXX) where XXX Is greater then 5 changes to Delay_ms(5), look on EPD.cpp
All Delay(XXX) where XXX Is greater then 5 changes to Delay_ms(5)