Crystalfontz LCD 634 SPI-interface with LabVIEW Blackfin

[Sawmoo]

I am currently involved in a design project in operating the Crystalfontz LCD 634 (yellow backlight) via LabVIEW 8.2 with the EZ-Kit lite ADSP-BF537 Evaluation board. This is basically an embedded application using the SPI driver on the board. There is a pin on the driver (SPI clock) which I can connect to SPI_CLK on the module and SPI Master OUT, which I'm assuming is DATA_IN; however, what is SPI_CS used for?

Does anyone have any knowledge or experience in operating this system? I am willing to go into more detail in solving this problem with someone know a little about the concept.

Thanks

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[CF Tech]

You can just drive /CS low and leave it there, but it is best to bring it high between bytes to ensure synchronization. Here is the timing diagram, and it is also in the data sheet in appendix A:

http://www.crystalfontz.com/supplemental/spi.html

It may be an issue to get the clock to go slow enough.

 

[Sawmoo]

Chip Select (CS) will all be what's needed to connect to allow the Blackfin board to interface with the CFA634-YFB-KS? No clock (SPI_CLK)? No DATA_IN?

 

[CF Tech]

You need /SPI_CLK and SPI_DATA, you might be able to get away without changing /SPI_CS (leave it low):

 

[Sawmoo]

Our boards SPI pins have the following descriptions for the pins: SPI Master In Slave Out, SPI Master Out Slave In, SPI Slave Select Enable, SPI Clock (can go with SPI_CLK on module), SPI Slave Select. Which of the pins will correspond correctly to SPI_CS and DATA_IN?

 

[CF Tech]

Here is my best guess:

Our LCD == Your Board
/SPI_CS == SPI Slave Select Enable
/SPI_CLK == SPI Clock
SPI_DATA (same as DATA_IN) == SPI Master Out Slave In