Further Documentation on fsl_iap_kbp.h

[awseiger]

I was poking around in the drivers folder of my SDK install, and I came across an API that appears to support loading an SB2.1 file from within a user application. However, I cannot find any documentation or examples.

If you have any examples or documentation of the kb_init, kb_deinit, and kb_execute functions it would be greatly appreciated. I have found the online documentation to not cover to the depth necessary to use these functions. For example, my call to kb_init() returns "4", and the listed return values in the header file do not correspond with any enumerator in my sdk folder.

[Alice_Yang]

Hello awseiger,

The only Doc describe these ROM APIs is the ROM_API.pdf attached in User Manual of LPC55xx (UM11126).

And about program SB2.1 file, recommend you use blhost, refer to the

 https://www.nxp.com.cn/docs/en/application-note/AN12283.pdf

BR

Alice

[awseiger]

Thank you, this is helpful. I was not opening the .pdf with Adobe Acrobat, so I never knew there were attachments.

What is the value of kRomApiVersion? I did a search of the SDK drivers folder and I did not find this symbol defined anywhere.

[Alice_Yang]

Hello awseiger,

You can get the ROM API version through the below function from fsl_api.c file:

static uint32_t get_rom_api_version(void)
{
if (BOOTLOADER_API_TREE_POINTER->bootloader_version.major == 3u)
{
return 1u;
}
else
{
return 0u;
}
}

Regards,

Alice