LPC5528 Change Bootloader String Descriptors

[aarondashine]

Hi,

For my application I am using the ROM bootloader MCUBOOT on the LPC5528. I have used the CMPA to modify the bootloader PID and VID but would like to also modify the string descriptors. According to the user manual (section 8.11.1.1) the USB VID, PID and Strings can be customized but I cannot find the address to store the new string descriptors or how to configure them.

Please can you point me in the right direction or provide an example.

Thanks

Aaron

[RaRo]

Hello @aarondashine,

Could you please take a look at MCU Bootloader v2.5.0 Reference Manual. Section 6.5.1. Device descriptor?

Best regards, Raul.

[aarondashine]

Hi Raul,

I have had a look through the document you linked to. If I understand correctly, the BCA starts at address 0x3C0 in the binary and I just need to write the string descriptors to the correct offset after this. Can you confirm this is correct for the LPC5528?

Thanks

Aaron

[RaRo]

Hello @aarondashine,

We apologize for the confusion, the document that we share you may not work with the LPC5528. Unfortunately, the LPC55xx family doesn't support custom strings for USB ISP HID.

The RM mentioning the possibility is a documentation issue and it has already been reported.

We apologize for the misunderstanding and any inconvenient this may cause you.

Best regards, Raul.