On Sun, Feb 15, 2009 at 1:07 PM, Andy Green <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Somebody in the thread at some point said: > > |> You need those 22 gpio *in addition* to the LCM data lines from glamo > to lcm? > | > | Ah, I think I see what you mean. I could convert the LCD data lines, > | VD0..23 into gpio and then I would have enough pins. Ah, yes, this > | will work. I had forgotten that S3C2410's VD lines are multifunction. > > The LCD bus is coming out of the Glamo, not the CPU on GTA02.
Oh, that would be a problem for me. > > There's other confusion in what you wrote, s3c2410 is GTA01 CPU, s3c2442 > is GTA02 and s3c6410 will be GTA03. GTA02 alone has the Glamo running > the LCM. Yes, sorry, I haven't been looking carefully. > > There is a command / bypass capability inGLamo LCD controller to send > commands to smart LCD, maybe it can match the needs of the E-ink > controller since it's a common async memory bus kind of deal then. > I should explain the interface a bit more. Basically, the communication between the host and the display is not a standard LCD type interface like the 24-bit AMLCD RGB666/hsync/vsync type, or even smart LCD (like MIPI-DSI) type, instead it is just GPIO wiggling. For example, http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=5353/1 +static void broadsheet_burst_write(struct broadsheetfb_par *par, int size, + par->board->set_ctl(par, BS_CS, 0); + par->board->set_ctl(par, BS_DC, 1); + for (i = 0; i < size; i++) { + par->board->set_ctl(par, BS_WR, 0); + tmp = (data[i] & 0x0F) << 4; + tmp |= (data[i] & 0x0F00) << 4; + par->board->set_hdb(par, tmp); + par->board->set_ctl(par, BS_WR, 1); + } + par->board->set_ctl(par, BS_CS, 1); so what I am looking for is 22 pins that I can treat in that way, ie: use as regular GPIO, and are in some way exposed on a connector or a surface trace that can then be wired to an interface board that will carry the display controller itself. Thanks, jaya _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
