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Boot App via TFTP on C6455

Shawn12883
Prodigy 40 points

Hi, All,

We are using DSK6455 to implement a TFTP boot. Our scheme is "Secondary bootloader in flash (0xB000_0000) ===> Tertiary bootloader in DDR (0xE000_0000) ===> (Down)Load app to L2 via TFTP ===> Jump to _c_int00 in app".

Our questions are: (1) Into what format should the app be converted for downloading and what utility should we use? (2) Is there any off-the-shelf loader code/image we can use in our tertiary bootloader?

Any hint will be greatly appreciated!

Shawn

 

  • 0
    TI__Mastermind 18130 points

    Shawn said:
    (1) Into what format should the app be converted for downloading and what utility should we use?

    Follow this User's Guide.

    Shawn said:
    (2) Is there any off-the-shelf loader code/image we can use in our tertiary bootloader?
    This is not something for which I have ever seen any collateral. TFTP boot is common on our DSP+ARM devices because the TFTP driver is built into Linux (or more specifically uBoot, I think); however, in the DSP realm this is not something with which I am familiar. I think you will have to develop this on your own unless a third party has already done so. This site might help you find something if a solution already exists.

  • 0 in reply to TimHarron
    Prodigy 40 points

    Thanks a lot for your reply, Tim.

    Studied more on the issue. I think we will use Boot Table generated by hex6x.exe as download image and write our own parser/loader.

    Now we have another issue. When we call NtTftpRecv(), the TFTP client of NDK for DSK6455 v2.0, it returned TFTPERROR_SOCKET (-4). Further debugging showed socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP) returned INVALID_SOCKET (-1). Calling fdError() also returned -1 (0xFFFFFFFF).

    Please shed some light on it. Thanks in advance for your help.

    Shawn