CCS/MSP432P401R: Linux Embedded on MSP432

Giulio Chierichini59

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Good evening.

I want to execute Linux Embedded in MSP432. I can't realize how to do. I suppose to program device with some boot loader as uBoot product saved in external flash memory (external SD memory).

Can some one describe me if this solution can be realized and provide some information about?

over 6 years ago

0 Chris Sterzik over 6 years ago

TI__Guru 68021 points

I do not know how to realize such a solution. I would recommend looking at the processors products.

www.ti.com/.../overview.html

e2e.ti.com/.../340884

Regards,
Chris

0 Giulio Chierichini59 over 6 years ago in reply to Chris Sterzik

Prodigy 50 points

Thank you for your reply. So is it not possible run Linux Embedded on ARM XMS432P401R?

0 Keith Barkley over 6 years ago in reply to Giulio Chierichini59

Guru 42195 points

If you can find a kernel that will also allow room for your user program that fits in 256KB of flash and 64KB of SRAM, go for it.

0 Giulio Chierichini59 over 6 years ago in reply to Keith Barkley

Prodigy 50 points

I think to use some thing like Das uBoot and start linux embedded stored in external memory.
I don't know if it is possible, but in this case can you send me some reference or documentation about?

0 Keith Barkley over 6 years ago in reply to Giulio Chierichini59

Guru 42195 points

You can't run from external memory, you would have to swap pages in and out - not practical with flash (You might actually wear it out!) and there is not enough RAM.

0 Giulio Chierichini59 over 6 years ago in reply to Keith Barkley

Prodigy 50 points

Again, for very personal reasons, how is it possible to swap pages and connect external RAM in MSP432?

0 Keith Barkley over 6 years ago in reply to Giulio Chierichini59

Guru 42195 points

External RAM is easy, just get one of the many SPI external RAM's available. Note that this does *not* add to the address space of the mcu, it would be a totally separate address space.

Since the MSP432P401R has no MMU, you would have to write the code to determine what "pages" to swap in from the external RAM.
You can then write it to RAM/Flash using the FLASHCTL routines in DriverLib and the example "flash_program_memory".

I am sure there is a lot more linking magic that needs to be done, but that is beyond my ken.

0 Giulio Chierichini59 over 6 years ago in reply to Keith Barkley

Prodigy 50 points

Ok thanks. Can I use it for my intent : load Das U Boot in internal flash memory by BSL, redirect Das U Boot to load Linux Embedded store in SD memory with another SPI and connect external RAM?

0 Keith Barkley over 6 years ago in reply to Giulio Chierichini59

Guru 42195 points

You are beyond my expertise.

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CCS/MSP432P401R: Linux Embedded on MSP432