F28069: Erasing flash using Flash APIs

Vishwanatha Manevarthe

Other Parts Discussed in Thread: CONTROLSUITE

Hello Community,
I am using F28069U device and developing a bootloader via USB. The USB part is working fine.
When I send the command to erase flash sectors (using dfuprog) along with starting address and length,
I get "Error DFU_ERR_DNLOAD_FAIL (-12) erasing flash!".
When I investigated further, I found that the length and the address are received correctly by the controller.
Then I tweaked the Erase part of the bootloader as shown here:
old code:
    // Figure out what to erase
    ulTemp = FlashAPIIndex((unsigned long)g_sErase.pcStart, g_sErase.ulLength);
    //Are we erasing sector A
    if(ulTemp & 0x01)
        //Erase sector A and reprogram reset vector
        ProgramBLNormalVector();

    ulTemp &= 0x7E;
    Flash2806x_Erase(ulTemp, &g_FlashStatus);
new code:
    Flash2806x_Erase(SECTORG, &g_FlashStatus);
    Flash2806x_Erase(SECTORF, &g_FlashStatus);
I observed that the changed code works. => the sector to be erased is not correctly returned by FlashAPIIndex.
I could not find any documentation about the usage of this API.
could anyone help me here?

Thank you,
Vishwanatha

over 13 years ago

0 Trey German289 over 13 years ago

TI__Mastermind 22025 points

Vishwanatha,

The FlashAPI is documented in controlSUITE. Try looking in this folder in controlsuite for the documentation:

C:\TI\controlSUITE\libs\utilities\flash_api\2806x\v100\doc

Regards,

Trey

0 Vishwanatha Manevarthe over 13 years ago in reply to Trey German289

Expert 1080 points

Hello Trey,

I did look into the document in controlSUITE. But this specific API is not mentioned (FlashAPIIndex).

thank you,

Vishwanatha

0 Trey German289 over 13 years ago in reply to Vishwanatha Manevarthe

TI__Mastermind 22025 points

Vishwanatha,

Oh, I misread your post. That function is actually part of the bootloader, but there isn't really any documentation on it. You can find the function itself on line 1493 in bl_usb.c. I had tested this function when I originally wrote it and found it to be working, but bugs can always sneak in.

What are you calling the function with and what is it returning?

Trey

0 Vishwanatha Manevarthe over 13 years ago in reply to Trey German289

Expert 1080 points

Hi Trey,

I send starting address as 0x3dc000 and length as 0x8000 (words) from dfuprog.exe.

"Apparently" the bootloader passes these to FlashAPIIndex as is.

Regards,

Vishwanatha

0 Vishwanatha Manevarthe over 13 years ago in reply to Vishwanatha Manevarthe

Expert 1080 points

Any updates?

0 Trey German289 over 13 years ago in reply to Vishwanatha Manevarthe

TI__Mastermind 22025 points

Vishwanatha,

Yes there were two bugs in the function and shame on me for not catching them. In my testing I was always erasing all the flash above the bootloader so I didn't catch these. That being said these were some very simple bugs that you should have been able to figure out. I apologize for the errors in my software but ask that you as an engineer try to fix minor issues like this yourself.

Try replacing the for loop in FlashAPIIndex with this:

    for(ulIdx = FLASH_START_ADDR ; ulIdx < FLASH_END_ADDR ; ulIdx += FLASH_PAGE_SIZE)
    {
        if((ulIdx >= (unsigned long)ulAddress) && (ulIdx < ((unsigned long)ulAddress + ulSize)))
        {
            ulTemp = (ulTemp << 1) | 1;
        }else{
           ulTemp = ulTemp << 1;
        }

    }

This will be fixed in the next release of 06x device support.

Best Regards,

Trey German

0 Vishwanatha Manevarthe over 13 years ago in reply to Trey German289

Expert 1080 points

hi Trey,

thank you for the solution. I haven't tested it yet; I'll update after confirming.

regards,

Vishwanatha

0 Vishwanatha Manevarthe over 13 years ago in reply to Vishwanatha Manevarthe

Expert 1080 points

Hi Trey,
I tested this code and it is working (tested with different sectors and lengths).
thank you for the solution.
(about solving it myself: I could give many reasons to defend myself why I did not debug it myself. But what matters is that, I just didn't do it :-) )

Regards,
Vishwanatha

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F28069: Erasing flash using Flash APIs