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critical section execution

Bindu Ganesh
Expert 2220 points
Other Parts Discussed in Thread: SYSBIOS

Hi,

We are in a crital section exection, example SPI data transmit and receive

Can any one suggest how to block

1)Task of higher or lower priority interrupting

2) other high priority interrupts

3) Block all the other, during critical section execution

Regards,

Bindu

  • 0
    Guru 19890 points

    Hi Bindu,

    1)Task of higher or lower priority interrupting
    => if other Task instances can access the same resource, semaphore_pend/post can be used to share the critical section safely,  Semaphore instance should be a counting semaphore initialized with 1. Or, Task_disable/restore.

    2) other high priority interrupts
    3) Block all the other, during critical section execution

    =>  Swi_disable/restore and Hwi_disable/restore 

    You can find the various gate implementations in <bios_install_dir>\packages\ti\sysbios\gates.

    Hope this helps.

    Regards,
    Kawada