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Original question:

TMS320F2800157: TMS320F2800157

TMS320F280039C: Time of authentic application use API function

Alena
Prodigy 215 points

Part Number: TMS320F280039C

Tool/software:

Hello,

1. We do not use secure boot mode, call CPU1BROM_calculateCMAC() function in bootloader to authentic our application.

The size of application is about 90Kb, and the time of authentic is about 80ms.

I think the time is difference from the document.

I do not know how to explan it.

I call the CPU1BROM_calculateCMAC() function as follow.

2. When we use secure boot mode, how can we test the addition time taken to authenticate first 16KB of flash boot mode?

  • 0
    TI__Expert 5430 points

    Hi, Please find answers to your questions below:

    1. Kindly note that the time measurement mentioned in the document is with respect to INTOSC which is 10MHz during the secure Flash boot. 

    2. You could measure the additional time taken by taking the application code via normal flash boot and then secure flash boot and note the time difference between the same in order to derive this. 

    Thanks & Regards

    Pramod