Hi,

We are using eZdsp F2812 to control a power electroinc rectifier.
Because our control algorithm is too large to reside only on the
internal RAM and also because we are not satisfied with internal FLASH  
timing, we tried to run all the code from external RAM, but we failed
to do so. We read the TI's SPRC097 about external interface and also
tried to run Example_281xCodeRunFromXintf.pjt in MC mode according to
TI's knowledge base advise, but we again failed. I should also mention
that we have read all the related threads about using correct linker
command file but again we are faced with the same message that the
memory address is not recognized. So, would you please guide us
through the necessary steps needed to run from External RAM and if you
guess we are missing some technical issues ?

Best regards,

You can post a message or access and search the archives of this group on DSPRelated.com:
http://www.dsprelated.com/groups/c28x/1.php

_____________________________________

 

When  debugging, you can  directly  run your program from external ram by s=
etting .text section in external area. Following is part of the cmd file in=
 one such example:
 SECTIONS
 {
 /*** Compiler Required Sections ***/
   /* Program memory (PAGE 0) sections */
   .text             : >ZONE2,       PAGE =3D 0
    .cinit            : >ZONE2,       PAGE =3D 0
    .pinit            : >ZONE2,       PAGE =3D 0  `````` But when building =
a standalone program, code must first starts from internal flash, then copi=
ed the application code to the external ram and then run from it. In the cm=
d file, set your application program sections load from FLASH, and run from=
 z
=D4=DA2007-06-09=A3=AChesam_mt <h...@yahoo.com> =D0=B4=B5=C0=A3=BA
Hi,
 We are using eZdsp F2812 to control a power electroinc rectifier.
 Because our control algorithm is too large to reside only on the
 internal RAM and also because we are not satisfied with internal FLASH
 timing, we tried to run all the code from external RAM, but we failed
 to do so. We read the TI's SPRC097 about external interface and also
 tried to run Example_281xCodeRunFromXintf.pjt in MC mode according to
 TI's knowledge base advise, but we again failed. I should also mention
 that we have read all the related threads about using correct linker
 command file but again we are faced with the same message that the
 memory address is not recognized. So, would you please guide us
 through the necessary steps needed to run from External RAM and if you
 guess we are missing some technical issues ?
 Best regards,

You can post a message or access and search the archives of this group on D=
SPRelated.com:
http://www.dsprelated.com/groups/c28x/1.php

_____________________________________

=20