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Interrupt enable/disable in C

Hans Kraus

Hi,

I need to disable interrupts in a small function, to keep the contents atomic. I found '__disable_irq() / __enable_irq()', but their comments state "Can only be executed in Privileged modes". As far as I know the compiled code runs in User mode. How do I switch the mode to Privileged or is there another possibility to achive my goal?

The SW runs on a STM32F051 (if that matters).

Regards, Hans

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    Cortex-M0 does not have "user mode", unless the "Unprivileged/Privileged Extension" is incorporated.  Your STM32F051 is always in privileged mode.

    Here's a section from ST's "Programming Manual."