The difference between INT_SYS_DisableIRQGlobal and taskENTER_CRITICAL

赵子成 — Tue, 14 Apr 2020 08:11:12 GMT

Hi experts,

I noticed the SDK supply two function: INT_SYS_DisableIRQGlobal and taskENTER_CRITICAL. They all disable interrupt. What is the difference?
And also the INT_SYS_EnableIRQGlobal and taskEXIT_CRITICAL?
Thanks.

Re: The difference between INT_SYS_DisableIRQGlobal and taskENTER_CRITICAL

dianabatrlova — Wed, 15 Apr 2020 07:16:26 GMT

Hello,

INT_SYS_DisableIRQGlobal / INT_SYS_EnableIRQGlobal functions are included in SDK and will disable/enable the global interrupt by calling the core API. These functions are also available without using FreeRTOS.

The macros below are FreeRTOS macros.

taskENTER_CRITICAL /taskEXIT_CRITICAL and taskDISABLE_INTERRUPTS/taskENABLE_INTERRUPTS.

The big difference is:

"Calls to taskENTER_CRITICAL() and taskEXIT_CRITICAL() are designed to nest. Therefore, a critical section will only be exited when one call to taskEXIT_CRITICAL() has been executed for every preceding call to taskENTER_CRITICAL()."

For more detail see this link: This page describes the FreeRTOS taskENTER_CRITICAL() and taskEXIT_CRITICAL() API macros

Also, this question on FreeRTOS forum was discussed:

difference between taskENTER_CRITICAL and tas - FreeRTOS

I hope it helps.

Best regards,

Diana

topic The difference between INT_SYS_DisableIRQGlobal and taskENTER_CRITICAL in S32K

The difference between INT_SYS_DisableIRQGlobal and taskENTER_CRITICAL

Re: The difference between INT_SYS_DisableIRQGlobal and taskENTER_CRITICAL