nanogui: Thread: Re: how to test lcd driver with pattern

Dear all,
  I am new to write lcd driver for mpc823.  The lcd is native and 4-bits grayscale.   How can I hard code some patterns to test the driver?  Where should I access the memory to put the pattern?  Have somebody to give me guides for it? 
Thanks in advance.

Since you are running 4 bit, I recommend any of the following patterns:

0x0F (alternating black and white)
0x0FF0 (alternating black and white columns that are 2 pixels wide)

Also, any usage of 0x5 is a great test pattern, because the bits are regular.

Jordan

On Tuesday 14 August 2001 21:36, Caleb CHEUNG [MBS] mentioned:
> Dear all,
>   I am new to write lcd driver for mpc823.  The lcd is native and 4-bits
> grayscale.   How can I hard code some patterns to test the driver?  Where
> should I access the memory to put the pattern?  Have somebody to give me
> guides for it? Thanks in advance.
>
>
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