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Subject: Re: Sansa View - weekly update

Re: Sansa View - weekly update

From: Rafaël Carré <rafael.carre_at_gmail.com>
Date: Sun, 21 Jun 2009 11:04:52 +0200

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On Sat, 20 Jun 2009 21:13:16 -0500
Robert Keevil <rkeevil_at_gmail.com> wrote:

> Since it looks so similar to the e200 (at
> least to me) is it safe to assume that the View is likely to contain
> another Renesas LCD controller?

I am not sure of this: now that you have found the lowest level LCD
functions you must find the command set of the View controller.

> What is the best way to try and
> pin-point which model is in use? (The HD66789 in the e200 is limited
> to 176x220 - the HD66776 and HD66781 are possibilities for 240x320,
> but they produced several other controllers after those).
> Since Rockbox code runs after the OF bootloader, how much hardware
> initialisation is required to get the LCD up and running? On the e200
> RB inits the GPIOs and LCD controller again.
> I would appreciate any tips, advice or insight!

Just download the datasheet of a candidate controller, and see if all
the commands you found have a correct meaning.

Since the lcd_init_device has a lot of commands I think the quick way
to match one controller is to look at lcd_write_reg or LCD_FB_BASE_REG
(device framebuffer).

- --
Rafaël Carré
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Received on 2009-06-21


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