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EVMDM642 FAQ (720 MHz version) - 10/01/2004


Important Notices

Video Examples

DSP/BIOS Applications


Important Notices

1.1 Connecting your EVM

IMPORTANT!!!!!!

When working with the DM642 EVM, be aware that the video inputs, video outputs, JTAG emulator and EVM power supply all have different ground potential levels. You must follow these procedures to prevent damage to your board.

  1. Always attach your JTAG emulator first before any other cables (video inputs/outputs, power) are connected.
  2. When you connect your video input/output cables make sure the video input and video output sources (camera, DVD, etc.) are turned off. After the cables are connected, you should power all inputs and outputs before applying power to the EVM.
  3. Always connect your EVM power supply last after everything else has been connected and powered up.

Note:

  1. An XDS560 emulator cannot be manually turned off since it is inside your PC. When you connect the XDS560 to an EVM with nothing else plugged in the EVM's ground will be be brought to the level of your XDS560/PC.


Video Examples

2.1 How to switch the video input from Composite to S-Video?
When working with the video examples involving video input signals, the examples are by default set to use the Composite RCA input. Each example uses the DDK to communicate with the video decoders, and has a variable of type SAA7115_ConfParams for that purpose.

    SAA7115_ConfParams EVMDM642_vCapParamsSAA7115 = {
        inMode
        outMode
        aFmt
        enableBT656Sync
        enableIPortOutput
        hI2C
    };

To reconfigure the example to run S-Video you have to change the analog input format ( aFmt ) in SAA7115_ConfParams from:
    SAA7115_AFMT_COMPOSITE
to
    SAA7115_AFMT_SVIDEO
Recompile the code and run.

DSP/BIOS Applications

3.1 RTDX bug when establishing an emulation connection
There is an RTDX bug that blocks an emulation connection when a DSP/BIOS appilcation with RTDX enabled is running from Flash memory. In order to establish an emulation connection, disable RTDX before writing the program to Flash memory

Follow these steps to disable RTDX:

  1. Go to the Projects Pane -> Projects -> DSp/BIOS Config and open the .cdb file
  2. In the CDB window go to Input/Output -> right click HST-Host Channel Manager and select Properties
    Select NONE for Host Link Type
  3. In the CDB window go to Input/Output -> right click RTDX- Real-Time Data Exchange Settings and select Properties
    Un-check the Enable Real-Time Data Exchange (RTDX)
  4. In the CDB window go to System -> right click Global Settings and select Properties
    Un-check the Enable Real Time Analysis
    Un-check the Enable All TRC Trace Event Classes

With RTDX disabled, the program can run without blocking emulation connections.

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