Re: [ECOS] redboot on STM32f4-discovery board

[Sergei Gavrikov <sergei.gavrikov@gmail.com>]

On Thu, 9 Oct 2014, Oleg Uzenkov wrote:

> But, without Flash Image System I do not see how to use redboot to
> load and store and run images.

Even for builds (CYGOPT_REDBOOT_FIS == 0) you can manage FLASH using
absolute FLASH addresses and FIS sub-commands: erase and write.

When you make RedBoot work smoothly on your target, then you can try to
load images directly to FLASH if you enable

  cdl_option CYGBLD_REDBOOT_LOAD_INTO_FLASH {
      user_value 1
  };

eCos is designed with XIP (eXecute In Place) in mind and you can use
RedBoot 'go' command to execute ROM image from specified place of FLASH.

For simple applications it would be enough just to shift *rom* ORIGIN
address and *rom_vectors* address in `target.ld' file and re-link ROM
application, then with the option above it is possible to load and run
such ROM image as

  load -m <protocol>
  go

I call that it worked on my target (load-into-flash-and-go). However,
you need to inspect and may be fix HAL startup files for such "FLASH"
builds.

Sergei

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