AURIX™ Forum Discussions

[User19642]

Hi,

I am working on a boot updater software (for reprogramming bootloader). I am planning to use 2 BMHDs .BMHD0 for bootloader and BMHD1 for boot updater.
I attached an image file about my design. I am planning to erase BMHD0 before erasing bootloader so that in case a reset happens ( ex :due to power failure) during this then execution should jump to boot updater.
Now could u please tell me how to erase and write BMHDx during run time. Is there any libraries are available for that. I could find only BMHDx structure form ILLD (Ifx_Cfg_SswBmhd.c). Couldn't find any APIs for that.
Please help me.




Thanks
Jithin K Joy

[Andrew_Q]

You will have to erase the sector where BMHD is located

[Darren_Galpin]

You will need to do an erase sector/load data/program page sequence using the BMHD UCB base address. The UCBs are treated as Data Flash 0 areas for the purposes of programming.

[User19642]

Thank you Andrew_Q & Darren Galpin answering .

I am using some flash drivers in my software which I use to erase and write in to pflash. Can I use the same for Dflash/UCB?

[Darren_Galpin]

Probably, although the amount of data you can load/program for a page differs between pflash and dflash, so you may need to take that into account,

[cwunder]

Just a caution, in the datasheet the UCB Retention Time requires that you follow these limits:

Max. 100 erase/program cycles per UCB, max 500 erase/program cycles for all UCBs together

Does your design consider this?

[NeMa_4793301]

Are we talking TC2xx here, or TC3xx? From your initial diagram, it looks like you only need to worry about programming PFLASH. Updating UCBs is best avoided.