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hi,

I've finally managed to put up a fairly nicely running NetBSD-based 
Jornada system. I'm using matchbox and rxvts and a few other apps and it 
runs well - better than fluxbox.

Well, then I decided that I'd like the screen to be a bit darker b/c its 
a little too bright and that would also benefit the battery... as I 
could not find settings for wsconsctl or alike (I am quite new to BSD) I 
looked at the J720 sources (J720ssp.c I think) and wrote a small app to 
manipulate the screen via ioctls. Eventually I also thought about 
possibly getting rid of WinCE too bright "bug" after reboot (but that's 
probably a different story :) )

But my problem is that
a) I've never programmed any ioctl stuff before, so I probably made 
mistakes and could not find too much info on this
b) my app does not affect the display at all... I can read the values 
but setting these params via ioctl does not affect either brightness or 
contrast - and the read-out remains the same.

Could somebody look at the code and possibly point out my mistake or 
give me a better way to adjust contrast and brightness? it is attached.

 >> Ohh and then I'm also trying to put together a few simple PIM Apps 
written in PyGTK, b/c that's one of the last things I miss :) I'd like 
to keep to GPE looks... have not finished much yet though.

 >> One more thing: I tried to "port" (more recompile) GPE 
(gpe.handhelds.org) on NetBSD and it would run on my desktop i386 but 
with most apps I kept getting errors that the apps could not find 
dynamic lib "libX11.so" - though the calculator did run :). I've had to 
make a few modifications to the makefiles to use gmake and more things. 
I am a complete novice with NetBSD but even I could make GPE at least 
compile within a few hrs :) So a GPE port should be feasable, though I 
lack the knowledge for now...

regards,
Lorant

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#define DEVICE "/dev/ttyE0"

#include <stdio.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <time.h>
#include <dev/wscons/wsconsio.h>
#include <fcntl.h>

#define TYPE WSDISPLAYIO_PARAM_BRIGHTNESS
#define NAME "brightness"

main()
{
    int fd = 0; /* standard input */
	struct wsdisplay_param disp;

	/* Adjust BRIGHTNESS or CONTRAST */
	disp.param = TYPE;

	/* Read the value via ioctl */
	if (ioctl(fd, WSDISPLAYIO_GETPARAM, &disp) < 0)
	{
		perror("ioctl");
		close(fd);
		exit(1);
	}
	else
		printf("Current display %s: min: %d, cur: %d, max: %d\n", NAME, disp.min, disp.curval, disp.max);


	//int min = disp.min, max = disp.max;

	/* Setup the wsdisplay_param structure */
	disp.curval = i;
	disp.param = TYPE;
	disp.min = disp.curval;
	disp.max = disp.curval;

//	if ((fd = open(DEVICE, O_RDWR)) < 0)
//		err(1, "Could not open " DEVICE);
	
	/* Set BRIGHTNESS or CONTRAST */
	printf("Setting %s to: %d\n", NAME, disp.curval);
        if (ioctl(fd, WSDISPLAYIO_SETPARAM, &disp) < 0)
        {
                perror("ioctl");
		close(fd);
                exit(1);
        }

	if (ioctl(fd, WSDISPLAYIO_GETPARAM, &disp) < 0)
	{
		perror("ioctl getparam");
		close(fd);
		exit(1);
	}
	else
		printf("Current display %s: min: %d, cur: %d, max: %d\n\n", NAME, disp.min, disp.curval, disp.max);

	close(fd);
}

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