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DDC264EVM: Using USB_IO_for_VB6.dll FPGA Register#9

Part Number: DDC264EVM

Dear TI,

I am an Engineer at OSI Optoelectronics. I am new to programming DDC624EVM but I have a lot of experience in VB6. I used WriteFPGARegsC to read and write the FPGA Registers. All registers are working fine except for Register#9. According to the User's Guide, the upper nibble(4-bits) must be 1 for 20-bit or zero for 16-bit. Also, the lower nibble should be 0 for 1-channel, 1 for 2-channels, 3 for 8-channels, ...10 for 1024 channels. I just need 128 channels. When I write &H17, which is 20-bit with 128 channels, to Register#9, I read back &H10 only. Whatever I write to Register#9, it always return with the lower nibble as zero. Why is that?

I am also having problems with configuring the DDC Registers. I initially write &H5A to the Array_Data. After I write to it and read it back, the array contents are still &H5A.

Thank you in advance for the help,

Romeo Demafelix

1 Reply

  • Hi Romeo,

    I am closing this thread since you had some additional questions posted in a separate thread.

    Please refer to the below post for response.
    e2e.ti.com/.../650612

    Regards

    Praveen

    TI makes no warranties and assumes no liability for applications assistance or customer product design. You are fully responsible for all design decisions and engineering with regard to your products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning your designs.

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