On 03.10.2014 13:40, John Dallaway wrote: > Hi Oleg > > On 02/10/14 09:47, Oleg Uzenkov wrote: > >> I am working with eCos on STM32f4-discovery board. >> >> I would like to build a redboot loader that could choose and load >> binaries (eCos+app) stored in internal flash at power on. >> >> The eCos port for STM32f4-discovery has got a redboot option under >> Packages list in Templates. However it seems to be very minimalistic and >> also not functional. Also there is no specific configuration file like >> redboot_ROM.ecm. >> >> Please, could you give me directions as to making a functional redboot >> loader for STM32f4-discovery board. >> >> Would it make sense to build redboot for stm32x0g_eval board (redboot >> seems to be working) and adapt it for STM32f4-discovery board? >> >> I would appreciate any input on this. > To be clear, there is no support for RedBoot in the STM32F4-Discovery > platform HAL at present. The STM32F4-Discovery board offers only 128KiB > of contiguous on-chip RAM, so loading applications into RAM prior to > execution would limit the size of your applications quite considerably. > RedBoot would also consume some of the available RAM for its own data > structures. > > If you are still interested in using RedBoot to load and launch your > applications, you will need to add the following to the > STM32F4-Discovery platform HAL package: > > a) CDL items and memory layout files for RAM startup > b) CDL items for behaving as a ROM monitor and for working with a ROM > monitor > c) RedBoot-specific CDL items and data structures > > You will find examples of all the above in the STM32x0G_EVAL platform > HAL package, but keep in mind that the STM32x0G_EVAL boards feature > external RAM. The naming of memory regions and startup types is > therefore different. The STM32x0G_EVAL "ROMINT" and "SRAM" startup types > are broadly equivalent to the STM32F4-Discovery "ROM" and (proposed) > "RAM" startup types respectively.
In addition, for example of RedBoot on a platform with only internal RAM you can look at Kinetis. Ilija > > I hope this helps... > > John Dallaway > eCos maintainer > http://www.dallaway.org.uk/john > -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
