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Global Interrupts

Richard Wheatley
Prodigy 60 points


I have been reading the documentation on the 55xx series of msp430.

Am I missing something or is there not a way to globally enable/disable ALL interrupts with a single bit or register?

  • 0
    TI__Mastermind 26380 points

    Richard,

    Please refer to MSP430x5xx Family User's Guide: Chapter 1, Section 1.3.3 Maskable Interrupts.

    "Each maskable interrupt source can be disabled individually by an interrupt enable bit, or all maskable interrupts can be disabled by the general interrupt enable (GIE) bit in the status register (SR)."

    Regards,

    Priya

  • 0 in reply to Priya Thanigai
    Prodigy 60 points

    Once again, I must be skimming instead of reading...Thanks Priya!

  • 0
    Guru 17650 points

    Hi Richard,

    you use the GIE-bit (as usual). The GIE-bit is in the Status register (SR). You can access it in C i.e. by:

    __enable_interrupt();                   // enable all interrupts --> GIE = 1 (HIGH)
    __disable_interrupt();                   // disable all interrupts --> GIE = 0 (LOW)

    Refer to page 109 (par. 4.3.3) for a decription of SR-register.
    Rgds
    aBUGSworstnightmare

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