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MSP430F6775A: Interrupt vectors

Peter Peter
Intellectual 390 points
Part Number: MSP430F6775A

Tool/software:

Hi,

I would like to ask is it possible to create custom interrupt vector addresses with custom interrupt functions stored from that address? Or is it all by design fixed. I mean I would like to use button interrupts even when is the main memory which includes the predefined interrupt vectors all blank from other memory section if possible.

  • 0
    Guru 96485 points

    The F5/F6 series defines a mechanism (SYSRIVECT) for putting the interrupt vectors into RAM. [Ref User Guide (SLAU208Q) Sec 1.3.6.1] I can't tell from the data sheet whether your device implements that mechanism.

    These alternate vectors are (also) in a fixed location -- at the top of RAM -- but they are (thus) modifiable. Until you set the bit (i.e. after Reset) the vectors are still taken from Flash.

    [Edit: Minor clarification.]

  • 0 in reply to Bruce McKenney
    Guru 23055 points

    The header file is the place to look:

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    $ grep SYSRIVECT msp430f6775.h
    #define SYSRIVECT (0x0001) /* SYS - RAM based interrupt vectors */
    #define SYSRIVECT_L (0x0001) /* SYS - RAM based interrupt vectors */
    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

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