Is there a size limit for the app_update.bin using MCUboot?

lbh00 · 2020-11-17T16:25:14+00:00

Hello, I am hitting a strange error only with this project where the app_update.bin file is 239672 bytes in size. The error I get is when I try to send it t...

jaredwolff

lbh00 the size of your .bin? That’s huge. I’m not sure if the bootloader will be able to handle an application size that large.

Please keep me informed!

lbh00

Hello,

The code is not yet final and we are testing different parts separately.
I will keep you posted.
What is the max file size MCUboot can handle? is it related to the flash size and the partitions of slot0 and slot1?
or are there other limitations ?

jaredwolff

lbh00 What is the max file size MCUboot can handle? is it related to the flash size and the partitions of slot0 and slot1?
or are there other limitations ?

Yup essentially it’s the free space / 2.

so it looks like something board specific on the connection level of the USB …

Can you program at_client manually and issue commands? Do you get a response?

lbh00

By the way I tried with bootloader V2 (supplied from your website) on another board and newtmgr did not timeout at all even without the -r3 option.
so it looks like something board specific on the connection level of the USB …

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