Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 7 Feb 2014 11:13:27 -0600

Hi Jim,

On 02/07/2014 10:38 AM, Jim Chen wrote:
> while(1) {
>         /* Wait for event from interrupt routine */
> printf("====before\n");
>        epicsMessageQueueReceive(intMsgQId, data, sizeof(data));
> printf("====queue responsed\n");
> }

What does the code at the other end of the message queue look like? Does
it get called from interrupt context, or from task-level?

The problem might be that you can't use C++ code inside an ARM ISR (I
don't know whether that's true or not, but it's conceivable), and since
the libCom/osi/os/default/osdMessageQueue.cpp implementation is written
in C++ the problem is with the choice of using the epicsMessageQueue
inthe first place. As I said I don't know whether that is a restriction
but it's something you should check.

- Andrew
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System