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DLPC3438: Write Image Crop/Write Display Size/Write Display Image Orientation could not work

Part Number: DLPC3438


     Board info :  dlpc3438+dlpa2000+dmd

     Use the specified read command, i get the Controller-Device-ID is 0x05, DMD-Device-ID is 0x60 0x0D 0x00 0x87.

     This system already works, the DMD generate the correct screen in test Pattern.(Color bars, Horizontal lines, etc)

      I can correctly control the Test-Pattern-Select to show different images, and control the LED Current to make image more brightly.

      But when i need to set the image display size, or make image Orientation, it does not work!


      For example, I want to sent the display size to : 1280 * 360

      My control Command as this: x_dlpc_wr 2 0x12 4 0x00 0x05 0x68 0x01

Op.Cmd DLPC.No Op.Code(Write Display Size) Length Byte1 Byte2 Byte3 Byte4
x_dlpc_wr 2 0x12 4 0x00 0x05 0x68 0x01

     And, of course, I tried a bunch of configuration parameters, no one works, And i don't know why.


      I guess there are some reasons for this problem:

1> My Config parameters is error. (This is unlikely to go wrong, Because some of the configuration items are already working correctly)

2> The firmware(Boot Code) on the external flash have some weakness.

3> May be some hardware error,etc

Please help me solve this problem.

Thanks a lot,Best wishes!