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taskDISABLE_INTERRUPTS to disable *all* maskable initerrupts?

Posted by xz8987f on October 23, 2016


On http://www.freertos.org/a00020.html#taskDISABLE_INTERRUPTS it says:


Macro to disable all maskable interrupts.

This macro should rarely be called directly. Use taskENTERCRITICAL() and taskEXITCRITICAL() instead.


But checking Cortex-M4 ports, it only disable interrupts up to

~~~ /** * task. h * * Macro to disable all maskable interrupts. * * defgroup taskDISABLEINTERRUPTS taskDISABLEINTERRUPTS * ingroup SchedulerControl */



And in the ARMCM4F port it is implemeted as: `#define portDISABLEINTERRUPTS() vPortRaiseBASEPRI()`

Which only masks interrupts up to configMAXSYSCALLINTERRUPT_PRIORITY.

I understand that taskENTERCRITICAL() would mask up to configMAXSYSCALLINTERRUPTPRIORITY, but according to the description taskDISABLEINTERRUPTS should maks all interrupts (and not only up to configMAXSYSCALLINTERRUPTPRIORITY)?

Thanks, Erich

taskDISABLE_INTERRUPTS to disable *all* maskable initerrupts?

Posted by rtel on October 23, 2016

You are right - I think this is a case of very old documentation, which I will correct. Thanks for the heads-up.

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