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MSP430F5525: How to adjust Memory Map in linker CMD file

AI31
Expert 1600 points
Part Number: MSP430F5525


Hello, 

Simple problem, but needs detailed answer, as I don't have actual hardware accessible:

1- I'm using MSP430F5525, and I want to modify the memory map to fit in my application code

2-  The default FLASH and FLASH2 segments are shown below, have these lengthes:

MEMORY
{
    SFR                     : origin = 0x0000, length = 0x0010
    PERIPHERALS_8BIT        : origin = 0x0010, length = 0x00F0
    PERIPHERALS_16BIT       : origin = 0x0100, length = 0x0100
    RAM                     : origin = 0x2400, length = 0x1000
    USBRAM                  : origin = 0x1C00, length = 0x0800
    INFOA                   : origin = 0x1980, length = 0x0080
    INFOB                   : origin = 0x1900, length = 0x0080
    INFOC                   : origin = 0x1880, length = 0x0080
    INFOD                   : origin = 0x1800, length = 0x0080
    FLASH                   : origin = 0x4400, length = 0xBB80
    FLASH2                  : origin = 0x10000,length = 0x4400
    INT00                   : origin = 0xFF80, length = 0x0002
    INT01                   : origin = 0xFF82, length = 0x0002
    INT02                   : origin = 0xFF84, length = 0x0002

3- The objective is to cut down FLASH segment to length=0x7000 instead of 0xBB80, and use this space in FLASH2

4- I tried changing the values to the following but I got a memory map error as shown below:

MEMORY
{
    SFR                     : origin = 0x0000, length = 0x0010
    PERIPHERALS_8BIT        : origin = 0x0010, length = 0x00F0
    PERIPHERALS_16BIT       : origin = 0x0100, length = 0x0100
    RAM                     : origin = 0x2400, length = 0x1000
    USBRAM                  : origin = 0x1C00, length = 0x0800
    INFOA                   : origin = 0x1980, length = 0x0080
    INFOB                   : origin = 0x1900, length = 0x0080
    INFOC                   : origin = 0x1880, length = 0x0080
    INFOD                   : origin = 0x1800, length = 0x0080
    FLASH                   : origin = 0x4400, length = 0x7000	//0xBB80
    FLASH2                  : origin = 0x10000,length = 0x9000	//0x4400

Error:

Questions:

- What are the correct FLASH and FLASH2 origin values so that I get it working? Please write the lines in details 

- is there anything else that needs to be changed?

- Note: I'll place 1 large array in this combined section, so I think it should be continuous in memory?

  • 0
    TI__Mastermind 39775 points

    Hi,

    You can see that the largest address is 0x143ff.

    FLASH2                  : origin = 0x10000,length = 0x9000  //0x4400

    This is try to declare the  largest address to be 0x19000. Make is small!

    Eason

  • 0 in reply to Eason Zhou
    Expert 1600 points

    Hi Eason, 

    I understand this part, could you please answer my questions above?

  • 0 in reply to AI31
    TI__Mastermind 39775 points
        FLASH                   : origin = 0x4400, length = 0xBB80
        FLASH2                  : origin = 0x10000,length = 0x4400

    This is the largest length.

    The question is that where you want to put the array? In flash memory? If so, complier will help you to do that.

  • 0 in reply to Eason Zhou
    Expert 1600 points

    I want to fit the array[0x4800] in FLASH2, for that I cut down a part from FLASH and I want to append it to FLASH2, 

    How should my memory map look like?

    Can I move the interrupt vectors down in the memory so that I fit Flash2 section as a whole above it as shown?

    MEMORY
{
    SFR                     : origin = 0x0000, length = 0x0010
    PERIPHERALS_8BIT        : origin = 0x0010, length = 0x00F0
    PERIPHERALS_16BIT       : origin = 0x0100, length = 0x0100
    RAM                     : origin = 0x2400, length = 0x1000
    USBRAM                  : origin = 0x1C00, length = 0x0800
    INFOA                   : origin = 0x1980, length = 0x0080
    INFOB                   : origin = 0x1900, length = 0x0080
    INFOC                   : origin = 0x1880, length = 0x0080
    INFOD                   : origin = 0x1800, length = 0x0080
    FLASH                   : origin = 0x4400, length = 0x6F80	//0xBB80
    FLASH2                  : origin = 0xB380, length = 0x9000	//0x10000 - 0x4400
    INT00                   : origin = 0x14380, length = 0x0002
    INT01                   : origin = 0x14382, length = 0x0002
    INT02                   : origin = 0x14384, length = 0x0002
    INT03                   : origin = 0x14386, length = 0x0002
    INT04                   : origin = 0x14388, length = 0x0002
    INT05                   : origin = 0x1438A, length = 0x0002
    INT06                   : origin = 0x1438C, length = 0x0002
    INT07                   : origin = 0x1438E, length = 0x0002
    INT08                   : origin = 0x14390, length = 0x0002
    INT09                   : origin = 0x14392, length = 0x0002
    INT10                   : origin = 0x14394, length = 0x0002
    INT11                   : origin = 0x14396, length = 0x0002
    INT12                   : origin = 0x14398, length = 0x0002
    INT13                   : origin = 0x1439A, length = 0x0002
    INT14                   : origin = 0x1439C, length = 0x0002
    INT15                   : origin = 0x1439E, length = 0x0002
    INT16                   : origin = 0x143A0, length = 0x0002
    INT17                   : origin = 0x143A2, length = 0x0002
    INT18                   : origin = 0x143A4, length = 0x0002
    INT19                   : origin = 0x143A6, length = 0x0002
    INT20                   : origin = 0x143A8, length = 0x0002
    INT21                   : origin = 0x143AA, length = 0x0002
    INT22                   : origin = 0x143AC, length = 0x0002
    INT23                   : origin = 0x143AE, length = 0x0002
    INT24                   : origin = 0x143B0, length = 0x0002
    INT25                   : origin = 0x143B2, length = 0x0002
    INT26                   : origin = 0x143B4, length = 0x0002
    INT27                   : origin = 0x143B6, length = 0x0002
    INT28                   : origin = 0x143B8, length = 0x0002
    INT29                   : origin = 0x143BA, length = 0x0002
    INT30                   : origin = 0x143BC, length = 0x0002
    INT31                   : origin = 0x143BE, length = 0x0002
    INT32                   : origin = 0x143C0, length = 0x0002
    INT33                   : origin = 0x143C2, length = 0x0002
    INT34                   : origin = 0x143C4, length = 0x0002
    INT35                   : origin = 0x143C6, length = 0x0002
    INT36                   : origin = 0x143C8, length = 0x0002
    INT37                   : origin = 0x143CA, length = 0x0002
    INT38                   : origin = 0x143CC, length = 0x0002
    INT39                   : origin = 0x143CE, length = 0x0002
    INT40                   : origin = 0x143D0, length = 0x0002
    INT41                   : origin = 0x143D2, length = 0x0002
    INT42                   : origin = 0x143D4, length = 0x0002
    INT43                   : origin = 0x143D6, length = 0x0002
    INT44                   : origin = 0x143D8, length = 0x0002
    INT45                   : origin = 0x143DA, length = 0x0002
    INT46                   : origin = 0x143DC, length = 0x0002
    INT47                   : origin = 0x143DE, length = 0x0002
    INT48                   : origin = 0x143E0, length = 0x0002
    INT49                   : origin = 0x143E2, length = 0x0002
    INT50                   : origin = 0x143E4, length = 0x0002
    INT51                   : origin = 0x143E6, length = 0x0002
    INT52                   : origin = 0x143E8, length = 0x0002
    INT53                   : origin = 0x143EA, length = 0x0002
    INT54                   : origin = 0x143EC, length = 0x0002
    INT55                   : origin = 0x143EE, length = 0x0002
    INT56                   : origin = 0x143F0, length = 0x0002
    INT57                   : origin = 0x143F2, length = 0x0002
    INT58                   : origin = 0x143F4, length = 0x0002
    INT59                   : origin = 0x143F6, length = 0x0002
    INT60                   : origin = 0x143F8, length = 0x0002
    INT61                   : origin = 0x143FA, length = 0x0002
    INT62                   : origin = 0x143FC, length = 0x0002
    RESET                   : origin = 0x143FE, length = 0x0002
}

    Or should I create FLASH1 segment from the cut part of FLASH and arrange the memory like that? 

    MEMORY
{
    SFR                     : origin = 0x0000, length = 0x0010
    PERIPHERALS_8BIT        : origin = 0x0010, length = 0x00F0
    PERIPHERALS_16BIT       : origin = 0x0100, length = 0x0100
    RAM                     : origin = 0x2400, length = 0x2000
    USBRAM                  : origin = 0x1C00, length = 0x0800
    INFOA                   : origin = 0x1980, length = 0x0080
    INFOB                   : origin = 0x1900, length = 0x0080
    INFOC                   : origin = 0x1880, length = 0x0080
    INFOD                   : origin = 0x1800, length = 0x0080
    FLASH2                  : origin = 0x4400, length = 0x9000	//0xBB80
    FLASH1                  : origin = 0xD400, length = 0x2A00
    FLASH                   : origin = 0x10000,length = 0x4400	//0x14400

    Both compiled but the application doesn't run on the 5529 launchpad 

  • 0 in reply to AI31
    TI__Mastermind 39775 points

    It seems all fine. 

    What do you mean the code doesn't run? Can you get into debug mode?

    Eason

  • 0 in reply to Eason Zhou
    Expert 1600 points

    Hi Eason, 

    I got "around this" by changing my code ...

    I'd close this ticket, however, for documentation, Changing interrupt locations didn't allow me even to debug the code, after loading the FW to the device CCS doesn't allow me to Start Debug or Step through...

  • 0 in reply to AI31
    Guru 100405 points

    You can't move the reset vector. You can move the others, but only to RAM, and only in your code, not in the linker file. [Ref User Guide (SLAU208Q) Sec 1.3.6.1]

    The second ("FLASH1") variant looks about right, assuming you didn't mess with the vectors (not shown).

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