topic Re: Can I share bootloaders between MCUs? in Kinetis Microcontrollers

Can I share bootloaders between MCUs?

derekcook — Tue, 14 Jun 2022 17:31:08 GMT

Hello,

Is it possible to use a bootloader developed for the KV31 with the KV56?

Re: Can I share bootloaders between MCUs?

EdwinHz — Tue, 14 Jun 2022 21:37:19 GMT

I’m afraid this isn’t possible.

Even though they are both MCUs from the same series, the differences between these two MCUs wouldn’t allow them to share bootloaders.

BR,

Edwin.

Re: Can I share bootloaders between MCUs?

derekcook — Wed, 15 Jun 2022 19:09:50 GMT

It looks like there is not a MCUBOOT specifically for the MKV56F512xxx24. However, there is a bootloader for the KV58F220M. I assume that's because this same bootloader works with the MKV56?

Re: Can I share bootloaders between MCUs?

derekcook — Wed, 15 Jun 2022 19:53:33 GMT

I am following this document to port the KV58F220M bootloader to the KV56. https://www.nxp.com/docs/en/reference-manual/MCUBOOTRM.pdf

With the KV31 we had our bootloader load to flash at 0xA000. We can still load to the same flash location with KV56? I noticed the default location was 0x1000a000.

Re: Can I share bootloaders between MCUs?

derekcook — Wed, 15 Jun 2022 19:56:50 GMT

I see RAM is at 0x0000 to 0x10000. Is this fixed? If so I guess my bootloader must be from 0x10000000 to 0x1000a000 and my application can start at 0x1000a000

Re: Can I share bootloaders between MCUs?

EdwinHz — Mon, 20 Jun 2022 16:34:54 GMT

Hi @derekcook!

You are correct. The RAM address is fixed, but the code address starts at 0x1000_0000. Table 5-1 of the datasheet shows the Memory Map:

BR,

Edwin.