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andreas_kristianstad
Visitor II
December 3, 2006
Question

GCC Vectors in RAM

  • December 3, 2006
  • 3 replies
  • 791 views
Posted on December 03, 2006 at 18:57

GCC Vectors in RAM

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    3 replies

    A
    andreas_kristianstadAuthor
    Visitor II
    December 1, 2006
    Posted on December 01, 2006 at 05:26

    Hi,

    first of all I'm a newbie so be patient with me. My problem is the following:

    I'm using a STR710-EVAL board and I'm trying to port the Freertos to it. I have loaded my program in ram 0x20000000 and I have remapped the memory to Ram. whenever I get a SWI the next I see in my GDB is that the pc = 0x08 and everything crashes. I recognize that this is the address of my Exception handler for SWI but the address should be 0x200000018 where the code is located??????

    What is happenning.

    P
    peterwrigley9
    Visitor II
    December 1, 2006
    Posted on December 01, 2006 at 10:37

    Hi gea,

    Program a simple jump table to RAM at address 0. Program this into Flash. When your interrupts fire, they will be redirected to your code in RAM.

    S
    sjo
    Visitor II
    December 3, 2006
    Posted on December 03, 2006 at 18:57

    This is based on an older version (v3.20) - not got round to updating yet (busy with str9). But is quite simple todo.

    It uses the Anglia IDEaliST toolchain (gcc based).

    Regards

    sjo

    ________________

    Attachments :

    FreeRTOS.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HtEn&d=%2Fa%2F0X0000000aKd%2FTsNxxtZj68SJcuO21yGHUWRdCNyLc_bdlJEEXtchroU&asPdf=false
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