Hi Oleg On 09/10/14 16:48, Oleg Uzenkov wrote:
> I have tried to run redboot on a custom board (very similar to > STM32f4-discovery board, so let's say that we have discovery in question). [ snip ] > I just would like to get redboot working on a board without external RAM. > > These are my findings so far: > > 1. I built redboot for ROM startup (applied relevant adjustings from > stm3240g_eval's redboot_rom.ecm) > > 2. flashed the board with redboot at 0x08000000 > > 3. > when CYGOPT_REDBOOT_FIS == 0 redboot loads, but is very unstable, can > stop working any time... But, without Flash Image System I do not see > how to use redboot to load and store and run images. > > when CYGOPT_REDBOOT_FIS == 1 redboot hangs. It happens when > do_flash_init() runs (problem in memcpy , probably illigal memory access) > > A question, can actually redboot work without external ram? > > If yes, how to fit it properly? (the board has stm32f407VE with 128+64 > KB of internal ram, 512KB internal flash) Consider the output of RedBoot on STM3240G-EVAL (from your earlier message): > RedBoot(tm) bootstrap and debug environment [ROM] > ... > Platform: ST STM3240G-EVAL (Cortex-M4) > RAM: 0x64000000-0x64200000 [0x64005d30-0x641dd000 available] > 0x20000000-0x2001f000 [0x20000000-0x2001f000 available] > 0x10000000-0x10010000 [0x10000000-0x10010000 available] > FLASH: 0x08000000-0x080fffff, 4 x 0x4000 blocks, 1 x 0x10000 blocks, 7 x > 0x20000 blocks > RedBoot> This shows that RedBoot is using 0x5d30 bytes of external RAM with FIS enabled. If you have ported RedBoot to your custom board correctly, I would expect it to report internal RAM usage similar, but not identical, to the following: > RAM: 0x20000000-0x2001f000 [0x20005d30-0x2001f000 available] Is that what you are observing? So RedBoot should fit it available RAM quite easily. I would concentrate on tracking down the reliability issue when RedBoot is configured without the FIS first. Once you have a stable RedBoot without the FIS, you can then try enabling the FIS. 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
