Hi Geert,
well, i finally have it working.
I had to set some values inside my fb driver to see the fonts:
static struct fb_fix_screeninfo amcorefb_fix __initdata = {
.id = "amcorefb",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_MONO10,
.xpanstep = 0,
.ypanstep = 1,
.ywrapstep = 0,
.accel = FB_ACCEL_NONE,
.line_length = (128/8),
};
static struct fb_var_screeninfo amcorefb_var __initdata = {
.xres = 128,
.yres = 64,
.xres_virtual = 128,
.yres_virtual = 64,
.bits_per_pixel = 1,
.nonstd = 1,
};
and also
info->var.red.offset = 0;
info->var.red.length = info->var.bits_per_pixel;
info->var.green = info->var.red;
info->var.blue = info->var.red;
inside probe function. As above, RGB structs values must be initialized,
otherwise nothing is displayed.
I still have a problem. Every single fonts is now displayed mirrored to left.
But entire text go left to right correctly. Seems to be a "bit" endiannes issue
inside a byte. This should be easy to solve.
Thanks again
angelo
On 20/09/2012 21:19, Geert Uytterhoeven wrote:
> Hi Angelo,
>
> On Mon, Sep 17, 2012 at 2:29 PM, angelo <angel...@gmail.com> wrote:
>> i have a working coldfire board, running uClinux. I connected a 128x64
>> monochrome lcd on gpio, and written a framebuffer driver.
>
> On gpio, so it's not memory mapped?
>
>> From userspace i can now write on "/dev/fb0" and see some images properly.
>
> Good.
>
>> My question now is about console. Just for playing, i am trying to see the
>> console output on the LCD. Even if very small, this should be possible, as i
>> enabled the "console framebuffer" driver and some fonts.
>
> OK.
>
>> Once i booted linux, i try an echo "test" > /dev/console, something seems to
>> happen on the screen, some pixels are cleared, but i don't see nothing
>> similar to font chars.
>
> Strange.
>
>> I read fb and fbcon docs, but i couldn't find any document that explain if
>> console fb driver (fbcon) can be used with some fb drivers only (like
>> vesfb), or with any fb driver. So my question is: is it possible or i should
>> add/create some additional driver ?
>
> The console should work, assumed you provided the proper drawing operations
> in your struct fb_ops. E.g. for simple packed monochrome:
>
> .fb_fillrect = cfb_fillrect,
> .fb_copyarea = cfb_copyarea,
> .fb_imageblit = cfb_imageblit,
>
> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 --
> ge...@linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like
> that.
> -- Linus Torvalds
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