LPC MicrocontrollersのトピックRe: startup file modification to add image header

startup file modification to add image header

Bhavin_Dhulkotiya — Fri, 17 Dec 2021 10:07:11 GMT

Hi all,

My original image starts from location 0x00002000. I want to add image header data(Highlighted in a rectangle) at a 0x00002100 location in flash so I have added it in the g_pfnVectors section in the startup_lpc804.c file. By adding it I got a warning as shown in the below image.

1. How to remove this warning?
2. What should be the proper way to add the header data 0x00002100?

Re: startup file modification to add image header

Alice_Yang — Tue, 21 Dec 2021 06:58:39 GMT

Hello bhavind,

If your project start from 0x00002000, I don't think you can add anything in 0x00002100, because

it over write vector table, you can see .map file the real memory used:

And there is no image header in LPC804 boot flow, why did you want to add it ?

Alice

Re: startup file modification to add image header

Bhavin_Dhulkotiya — Tue, 21 Dec 2021 09:12:07 GMT

Hi @Alice_Yang

We want to add the header for the Secondary Bootloader. And we want to add it at the 0x00002100 location.

Thanks.

Re: startup file modification to add image header

Alice_Yang — Wed, 22 Dec 2021 08:06:16 GMT

Hello ,

Do you mean Secondary bootloader use memory 0x0000 to 0x1FFF,

application start from 0x2000. Add image header into secondary bootloader project?

If yes, the two projects use overlapping address.

Alice

Re: startup file modification to add image header

Bhavin_Dhulkotiya — Fri, 31 Dec 2021 09:04:04 GMT

@Alice_Yang

We want to implement as shown below image on LPC804. Please find the reference document here.

Now I want to add a header at 0x00002100.

Thanks.

Re: startup file modification to add image header

Alice_Yang — Fri, 07 Jan 2022 05:39:47 GMT

Hello bhavind,

This is not very easy for MCUXpresso, please refer to my below steps, I place the image header at 0x100, the same for 0x2100.

I attached the steps as picture, also the project, you can refer to.

Alice

Re: startup file modification to add image header

Bhavin_Dhulkotiya — Mon, 10 Jan 2022 12:46:49 GMT

Thank you! @Alice_Yang

Is there any way to add this header in the startup.c file instead of using modified .ld file?

Re: startup file modification to add image header

Alice_Yang — Tue, 11 Jan 2022 02:11:51 GMT

Hello bhavind,

As far as I know, there isn't .

Alice

Re: startup file modification to add image header

Bhavin_Dhulkotiya — Wed, 12 Jan 2022 04:53:06 GMT

Thank you @Alice_Yang for confirmation.