Re: Unexpected/shorter CS when interfacing LCD controller

[Mike Wolfram <mike.wolfram@xxxxxx>]

On Thursday, 3. February 2005 11:17 am, frahmsen wrote:
> Hi,
> we also have a custom AT92RM9200 board with an Epson LCD- Controller, but
> at CS2. At CS5 we have some Binary I/O. We have no unexpected CS-strobes on
> either CSs.
> Ingolf
>

In AT91RM9200-Loader/include/AT91RM9200.h I found these two lines:

#define 	AT91C_EBI_CS4A_SMC                  ((unsigned int) 0x0 <<  4) // 
(EBI) Chip Select 4 is assigned to the Static Memory Controller and NCS4,NCS5 
and NCS6 behave as defined by the SMC2.
#define 	AT91C_EBI_CS4A_SMC_CompactFlash     ((unsigned int) 0x1 <<  4) // 
(EBI) Chip Select 4 is assigned to the Static Memory Controller and the 
CompactFlash Logic is activated.

I couldn't find any other references to CS4. Could it be that I need to tell 
the EBI to not use CF? What is the default when not set?

Do I need something like

    AT91F_PIO_CfgPeriph(AT91C_BASE_PIOC,
                        AT91C_PC11_NCS5_CFCE1 | AT91C_PC12_NCS6_CFCE2,
                        0
                       );

to initialize the pins correctly? (On CS6 there is a 2x20 alpha LCD.)

--
Mike Wolfram

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