topic Re: AN12218SW Bootloader fails to write correct data if record straddles sector boundary. in S32K

AN12218SW Bootloader fails to write correct data if record straddles sector boundary.

lucianomoretti — Tue, 15 Jun 2021 19:54:53 GMT

In the code for the AN12218 Boodloader if the SREC record straddles a page boundary (flash_program_address is in one page, flash_program_address+data_size is in the next page) then it does not erase the next page to allow programming the data and on the next pass the FlashEraseSector() call erases and leaves a hole unprogrammed (all 0xFF).

Another conditional to check flash_prog_address+data_size and erase is needed.

Re: AN12218SW Bootloader fails to write correct data if record straddles sector boundary.

lukaszadrapa — Wed, 16 Jun 2021 14:00:47 GMT

Hi,

this weakness of s-record parser has been already reported to us:

https://community.nxp.com/t5/S32-Design-Studio/Why-does-the-AN12218SW-bootloader-fails-to-parse-the-generated/td-p/1275665

We are working to fix this. Currently the workaround is to convert the file as mentioned in the thread above.

Regards,

Lukas

Re: AN12218SW Bootloader fails to write correct data if record straddles sector boundary.

lucianomoretti — Wed, 16 Jun 2021 16:27:15 GMT

I think you misunderstand.

The 8-byte alignment issue is related to the flash write process.

This issue is related to the sector erase. If an aligned SREC (say 32 bytes, evenly divisible by 8 bytes) straddles the sector boundary (say 16 bytes in one sector, 16 bytes in the next) then the erase will not properly happen and you'll be left with invalidly programmed data.

Re: AN12218SW Bootloader fails to write correct data if record straddles sector boundary.

lukaszadrapa — Wed, 23 Jun 2021 13:43:59 GMT

Thanks, I have already asked the team to rework this completely, so I hope it will be updated soon.

Regards,

Lukas