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Manipulate Ram in an LPC4078

Chris84

Hello together,

I have an LPC4078. I made measurements with it and everything goes into the RAM. Now I want to manipulate the RAM. Is there a pointer for that? Is the any other possibility?

Thank you and greetings

Chris

Parents
  • 0 in reply to Stephen Theobald

    Hey Stephen,

    I just saw that I am in the wrong forum. No I don't use the Arm Developement studio.

    I want to alter what is written in the ram or move it from one point to another. Basically I am searching for the pointer which one I can do that. Or is that not possible?

    Thanks in advance.

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  • 0 in reply to Stephen Theobald

    Hey Stephen,

    I just saw that I am in the wrong forum. No I don't use the Arm Developement studio.

    I want to alter what is written in the ram or move it from one point to another. Basically I am searching for the pointer which one I can do that. Or is that not possible?

    Thanks in advance.

Children
  • 0 in reply to Chris84

    Pointers are just numbers.

    uint32_t *src = (uint32_t) 0x20000000;
uint32_t *dst = (uint32_t) 0x20010000;
uint32_t temp = dest[100];  // save original dest word 100
memcpy(dst, src, 32768); // copy 32k bytes from start of RAM to later in RAM.
dest[100] = temp;  // restore that one word to old value

    I believe that all Cortex-M processors have their internal RAM at 0x20000000.

    You must of course be careful not to overwrite RAM that is already in use by other code.