8-bit MicrocontrollersのトピックRe: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration file

QuangCa — Sat, 14 Jan 2023 10:34:31 GMT

Hi NXP support team.

I using Codewarrior Version: 11.1

NMT88 EV board.

Bootloader: PE multilink

When i loading hex file i meet codeWarrior Alert " memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration file"

What does this mean

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

vicentegomez — Tue, 17 Jan 2023 20:43:01 GMT

I am really sorry I did not get properly your question, can you please give me more information

also please tell us the part number that you are using

regards

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

QuangCa — Mon, 23 Jan 2023 08:30:32 GMT

Hi Vicentegomez,

Sorry for my late reply, i am in vacation of new lunar year in Vietnam.

I mean when i flash the hex file in to NTM88H055 IC,

I meet this alert " memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration file"

So i worry about this alert make my code run fail.

But i check with this alert, my program run normal.

I don't know this alert for exactly what warning? Can you explain more for this alert?

thanks and best regards,

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

diazmarin09 — Tue, 24 Jan 2023 16:12:31 GMT

Hello Quang,

I hope all is great with you.

This is because the trim coefficients are programmed by NXP between $FD40 and $FDFF.

Writing the FLASH memory is done byte by byte, but erasing it is done page by page. In the NTM88, a page is 512-byte long and the full FLASH memory contains 16 pages. The trim coefficients are located in the page that starts at address $FC00 and ends at address $FDFF.

I do not recommend to erase such values.

I hope this information helps.

Regards,

David

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

QuangCa — Thu, 26 Jan 2023 13:28:21 GMT

Hi diazmarin09
So how can i need to do to pass this alert. Do i need re-configure for flash.
Sorry i am a new in NXP chipset.
I ignore this alert and my program is still run well.
thanks,

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

diazmarin09 — Thu, 26 Jan 2023 17:19:23 GMT

Hello Quang,

I am pleased to contact you again.

In this case, I do recommend running an example project and use it as a reference for your design. It would be helpful if you reviewed the FLASH memory handling.

Please let me know if you find the information above useful.

Regards,

David

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

windy — Thu, 16 Feb 2023 03:15:44 GMT

I also encountered exactly same problem with example project from NXP, "NTM88_LocAngle_XZ".

This project contains data in FLASH of address 0xFD66 - 0xFDFF, the trim area.

Can we ignore these message?

This is map file of this project.

Name Addr hSize dSize Ref Section RLIB --------------------------------------------------------------------- cau16BondwireLimits FD66 10 16 0 .abs_section_fd66 cu16BondwireLimitXH FD76 2 2 0 .abs_section_fd76 cu16BondwireLimitST FD78 2 2 0 .abs_section_fd78 cu8SMISelfTestOff2 FD7E 1 1 0 .abs_section_fd7e cu8SMISelfTestGain3 FD7F 1 1 0 .abs_section_fd7f .... cu8Code1 FDFD 1 1 1 .abs_section_fdfd cu8Code2 FDFE 1 1 1 .abs_section_fdfe cu8Code3 FDFF 1 1 1 .abs_section_fdff cu8FirmRel FFAC 1 1 1 .abs_section_ffac cu16TargetID FFAD 2 2 0 .abs_section_ffad

Thanks.

Re: memory area from address 0xFD40 with size 2 is restricted for write in the memory configuration

diazmarin09 — Mon, 20 Feb 2023 16:50:35 GMT

Hello Windy,

I hope all is great with you.

The following response has been validated with one of our specialists:

Yes, it is normal. The warning informs the user that write and erase operations are prohibited on the trim page, in order not to erase or overwrite the trim coefficients.

So, just click “Yes” and go ahead with the programming.

In order not to see this message again, it is ok to tick “Remember my choice and don’t show this dialog”.

Please let me know if you find the information above useful.

Regards,

David