kernell feezes

Kernel
1

nobody wrote on Tuesday, October 31, 2006:

Hi,

I am having strange problem (at least in my point of view).
When I do this:
__arm void vRPM_ISR ( void )
{
        xNewRPM = xTaskGetTickCount();

whole freertos kernell freezes.
When I chanege it to this:
__arm void vRPM_ISR ( void )
{

        xNewRPM = xTickCount;

everything runs well. So the problem must be in xTaskGetTickCount function in here:
taskENTER_CRITICAL(); and taskEXIT_CRITICAL();

any explanation appreciated
Thanks
Josef

2

nobody wrote on Tuesday, October 31, 2006:

You point out the answer yourself - do not call API functions from ISR’s unless they have FromISR at the end of the function name.  Critical sections inside an ISR is not good.

3

nobody wrote on Wednesday, November 01, 2006:

Hi,

Thank you for your reply. I thought that I have missed something.

thank you very much
Josef