If you have already added the chip and it is initialized during startup, you most likely have to add a section for it in your linker command file. Depending on where your internal RAM is located and where the external one is: If they are continuous that can be enough.
Best regards Christian On 14/06/2019 04:42, Jython wrote: > we have added 1M ram by FSMC, and want to manage it by system malloc > controler > > On Fri, Jun 14, 2019 at 10:26 AM Mr. Andrei Chichak <gro...@chichak.ca > <mailto:gro...@chichak.ca>> wrote: > > A 407 doesn’t normally have external RAM. > > ARMs have flash at 0 and the 407 has RAM at 0x2000 0000 as you > discussed earlier. > > If you want to work with external flash or RAM, you have to set up > the FSMC or FMC to support it, but that isn’t a part of the dev > board that Sebastian used for the BSP port. > > The external memory is going to be very specific to your board. > Which board are you working with? > > A > > > On 2019-June-13, at 06:23, Christian Mauderer > <christian.maude...@embedded-brains.de > <mailto:christian.maude...@embedded-brains.de>> wrote: > > > > On 05/06/2019 02:55, Jython wrote: > >> Hello! > >> > >> 2. In the normal (non-debugging) case, the linker script still > >> places the > >> > >> .text section near zero, but places the start of the .data and > .bss > >> sections at the start location of the MPC555's internal RAM. The > >> system startup code then configures the external RAM just > after the > >> internal RAM in memory, forming one large block from the two RAM > >> devices. > >> > >> from https://devel.rtems.org/wiki/TBR/BSP/Ss555 > >> > >> but i dont know how to configure the external RAM just after the > >> internal RAM in memory? > >> hope you could give me some guide! > >> > >> > > > > Hello Jython, > > > > the documentation you linked is for an MPC. But your subject line > > mentions an STM32. What controller / BSP are you using? > > > > Best regards > > > > Christian Mauderer > > -- > > -------------------------------------------- > > embedded brains GmbH > > Herr Christian Mauderer > > Dornierstr. 4 > > D-82178 Puchheim > > Germany > > email: christian.maude...@embedded-brains.de > <mailto:christian.maude...@embedded-brains.de> > > Phone: +49-89-18 94 741 - 18 > > Fax: +49-89-18 94 741 - 08 > > PGP: Public key available on request. > > > > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. > > _______________________________________________ > > users mailing list > > users@rtems.org <mailto:users@rtems.org> > > http://lists.rtems.org/mailman/listinfo/users > > > _______________________________________________ > users mailing list > users@rtems.org > http://lists.rtems.org/mailman/listinfo/users > -- -------------------------------------------- embedded brains GmbH Herr Christian Mauderer Dornierstr. 4 D-82178 Puchheim Germany email: christian.maude...@embedded-brains.de Phone: +49-89-18 94 741 - 18 Fax: +49-89-18 94 741 - 08 PGP: Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. _______________________________________________ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
