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Thread: Add additonal area to the copytable of tc222

  1. #1
    New Member New Member Johanox is on a distinguished road
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    Add additonal area to the copytable of tc222

    Ok, here is the problem.

    I have a bunch of variables that I need to have a ROM version of at a specific address and a RAM version at any RAM address. No problem yet, I just did two copies of each variable (one ROM and one RAM) and a init function which copies from ROM to RAM.
    The problem is that the init function which copies the variables is really huge and take a lot of flash. So I started looking at just using a memcopy over all of the variables, but I do not know how to garantee that the variables is in the right order and with the same padding. I cannot use a struct to accompish this as I need to find the variables in the map-file.

    Then I found the copytable and saw that all the RAM variables was copied from the ROM with the copytable. The problem is that I cannot move the ROM versions of the copytable variables.

    So my question is really can I add an additional area with specific variables to the copytable?

    This is how it looks like in the map-file:

    | mpe:dspr0 | | .data.Temp.VariableA(13026) | 0x00000001 | 0x700027fe | 0x000027fe | 0x00000001 |

    | mpe:pflash0 | | [.data.Temp.VariableA] (35650) | 0x00000001 | 0xa002281e | 0x0002281e | 0x00000001 |

    I want to change the ROM address 0xa002281e to another which I can choose, but just for specific variables, I do not want to move the entire copytable ROM area.

    Please let me know if you need additional information, I am sure you do, this is my first time writing such a post.

    /Johan

  2. #2
    Intermediate Intermediate HIGHTEC.henk-piet.glas is on a distinguished road
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    Hi Johan,
    Quote Originally Posted by Johanox View Post
    <snip> I want to change the ROM address <snip>
    TASKING rom copies can be located by means of the load_addr linker script attribute. Their user manual shows an example how this is done.

    Best regards,

    Henk-Piet Glas
    Principal Technical Specialist

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