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TMS320C6745: do need to know what is inside rom bootloader

Ajitha JK
Prodigy 180 points

Part Number: TMS320C6745

can any one help me

  • 0
    TI__Guru** 116950 points

    Yes, we do have the source and the symbols for the ROM. If you can provide specifics of what you want to know then we can provide details. For example, while debugging if you provide program counter value of the DSP, we can tell you where the ROM code is hung.

    Alternately, you can use the debug GEL file attached to understand the ROM status:

    8877.OMAPL1x_debug.gel

    The details of ROM implementation are also explained in the Application note for C674x Bootloader :

    http://www.ti.com/lit/an/sprabb1c/sprabb1c.pdf

    Hope this helps.

    Regards,

    Rahul

  • 0 in reply to Rahul Prabhu
    Prodigy 180 points

    Sir my requirement is to boot in NOR flash mode, i have done it through boot pins and i'm getting the required signals for NOR flash, but the signals are too slow they are found to take a width of ~300 clk cycles. how can this happen?

    Also i need to know whether i can start giving instructions directly for execution, any more configuration need to be written into for using this interface?

    this is for testing the device in standalone mode in a board with interfaces simulated externally.

  • 0 in reply to Ajitha JK
    TI__Guru** 116950 points

    Are you referring to serial or parallel NOR flash ? Please note that initially the device boots with PLL in bypass so DSP is not running at full speed ...when the device determines the boot media and configuration, it will setup the clocks.

    WE have no idea how the NOR flash is connected, if the boot switches are connected correctly, how the boot image was created and flashed so please try and provide us sufficient information to provide guidance.

    Regards

    Rahul

  • 0 in reply to Rahul Prabhu
    Prodigy 180 points

    Rahul Sir

    my objective is to test the device by providing instructions through NOR flash interface which im simulating through a VLSI tester.

    the device is tested in standalone mode in a pcb, where all signals are simulated.

    for this i have configured the boot pins as 0001h, which is NOR flash (8-bit parallel). i find that after reset the signals cs2, oe & we are placed in the respective pins by the processor along with ema_a12 to ema_a0 and ema_ba0 & ema_ba1.

    but the width of the signals are found to be ~300 clock cycles.

    i have seen in sprabb1c that we need to place the configuration word , NOR Boot Configuration Word for configuring the NOR flah in direct boot mode.

    after obtaining the signals  im planning to give instructions directly without any further configuartions. does this work?

    whether any further booting commands need to be given to the processor? if so can i know what are those commands.

    Thank u for your valuable response

    Ajitha