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Pandaboard Dual-Core port

Simon Holmbacka

November 01, 2012 11:07

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This port runs two separate FreeRTOS instances on the Dual-Core Pandaboard. Standard FreeRTOS demos are provided and run on each core.

The port contains a makefile which loads the binaries directly to the ram of the Pandaboard with ymodem. All boot settings are provided in the makefile. To run the demo execute "make" and "make upload". Make sure that you have a usb-to-serial adapter between the PC and the Pandaboard (the makefile is by default set to use /dev/ttyUSB0). The upload script requires expect to be installed.

Here is the direct link to the port on github: https://github.com/downloads/ESLab/FreeRTOS---PandaBoard/FreeRTOS-PandaBoard.zip

This port was made by Åbo Akademi University

http://research.it.abo.fi/

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5 comments

• 0
  
  Simon Holmbacka December 14, 2012 11:50

  Updated link:

  https://github.com/downloads/ESLab/FreeRTOS---PandaBoard/FreeRTOS-PandaBoard.zip

• 0
  
  John Wilkes December 18, 2012 01:41

   

  I tried building this with a gcc 4.6.3 cross compile environment and it dies with an assersion failure in ld:

  arm-linux-gcc  -nostartfiles -Wl,-T,plain.ld -mcpu=cortex-a9 -g3 -gdwarf-2 -o FreeRTOSDemo.elf Build/Source/croutine.o Build/Source/list.o Build/Source/queue.o Build/Source/tasks.o Build/Source/timers.o Build/Source/portable/GCC/ARM_Cortex-A9/port.o Build/Source/portable/MemMang/heap_2.o Build/Demo/main.o Build/Demo/omap4_uart.o Build/Demo/pl031_rtc.o Build/Demo/printf-stdarg.o Build/Demo/serial.o Build/Demo/sp804_timer.o Build/Demo/Common/Minimal/BlockQ.o Build/Demo/Common/Minimal/blocktim.o Build/Demo/Common/Minimal/comtest.o Build/Demo/Common/Minimal/countsem.o Build/Demo/Common/Minimal/dynamic.o Build/Demo/Common/Minimal/flop.o Build/Demo/Common/Minimal/GenQTest.o Build/Demo/Common/Minimal/integer.o Build/Demo/Common/Minimal/PollQ.o Build/Demo/Common/Minimal/QPeek.o Build/Demo/Common/Minimal/recmutex.o Build/Demo/Common/Minimal/semtest.o Build/Demo/startup.o
  collect2: ld terminated with signal 11 [Segmentation fault], core dumped
  /home/john/buildroot/buildroot-2012.11/output/host/usr/lib/gcc/arm-buildroot-linux-uclibcgnueabi/4.6.3/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: BFD (GNU Binutils) 2.21.1 assertion fail elf32-arm.c:12478
  make: *** [FreeRTOSDemo.elf] Error 1

  The assertion failure happens here:

    if (elf_hash_table (info)->dynamic_sections_created)
      {
        asection *splt;
        Elf32_External_Dyn *dyncon, *dynconend;

        splt = bfd_get_section_by_name (dynobj, ".plt");
        BFD_ASSERT (splt != NULL && sdyn != NULL);

        dyncon = (Elf32_External_Dyn *) sdyn->contents;
        dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);

        for (; dyncon < dynconend; dyncon++)
   {
     Elf_Internal_Dyn dyn;
     const char * name;
     asection * s;

     bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);

     switch (dyn.d_tag)

  ...

     case DT_PLTRELSZ:
         s = bfd_get_section_by_name (output_bfd,
          RELOC_SECTION (htab, ".plt"));
  ==> BFD_ASSERT (s != NULL); <==
         dyn.d_un.d_val = s->size;
         bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
         break;

  I'm using a toolchain created by the buildroot utility (http://buildroot.uclibc.org). Do I need to build the cross compile toolchain differently for FreeRTOS?

  Any and all pointers appreciated!

   

• 0
  
  John Wilkes December 18, 2012 04:39

  Update: I used the Linaro "bare metal" toolchain, and it built FreeRTOS with no errors.

  http://www.linaro.org/downloads/

   

• 0
  
  Simon Holmbacka December 25, 2012 09:05

  It was originally built with devkitARM http://sourceforge.net/projects/devkitpro/files/devkitARM/ but thanks for trying the Linaro toolchain also.

• 0
  
  Sathish Kumar Balasubramaniam January 09, 2014 09:32

  With the devkitARM compiler, i am getting the following error

   

  ../Demo/startup.S: Assembler messages:
  ../Demo/startup.S:71: Error: selected processor does not support requested special purpose register -- `mrs R0,SPSR'
  ../Demo/startup.S:89: Error: selected processor does not support requested special purpose register -- `mrs R0,SPSR'
  ../Demo/startup.S:102: Error: selected processor does not support requested special purpose register -- `mrs R0,SPSR'

   

  while with the gcc-arm-none-eabi-4_7-2013q1 compiler from LINARO, it compiles successfully.