[Iñigo]

Originally Posted by Mackx

Hi Iñigo,

I only studied this part of the firmware briefly, but it seems that there are already some provisions. See: \Sources\3.0\iRex\libs\erutils\src\display_utils.c . The code is used by the keyboard app: \Sources\3.0\iRex\erkeyb\src\erkeyb-display-sched.c.
The messages send by display_utils.c are handled by sysd (\Sources\3.0\iRex\sysd\src\display.c) there you can see what the effect will be from a message.

For what I've read in GregorRichards' rxvt port [1] it's as easy as some ioctl here and there.

[1] https://www.mobileread.com/forums/showthread.php?t=81119

Originally Posted by ericshliao

IMHO, porting xepdmgr to DR800 should be more feasible than adding eink-refresh code to FLTK.
In xepdmgr, "xepdmgr_einkfb.c" contains most eink-refresh control code. Some of them are iLiad-specific. I don't know if the required functions are available for DR800.

I was thinking on an external lib with some easy-to-use functions "update_fast()", "update_complete()", etc.

#include <sys/ioctl.h>
#include "delta.h"

int fb0fd=-1;

[...]

struct display_update_info duinfo;
if (fb0fd < 0)
    fb0fd = open("/dev/fb0", O_RDWR);
duinfo.waveform = 1; // 1=full, 6=quick, 9=partial
duinfo.color = 0;
ioctl(fb0fd, FBIO_DELTA_UPDATE_DISPLAY, &duinfo);