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SCIOPTA - Real-Time Kernel

8-2 Manual Version 4.1 User’s Manual

SCIOPTA - Real-Time Kernel

8 SCIOPTA Trigger

8.3 Trigger Example

This is a very small example how triggers can be used in SCIOPTA processes. A prioritized process is waiting on

its trigger and will be executed when another process (in this case an interrupt process) is activating the trigger.

/* This is the interrupt process activating the trigger of process trigproc */

extern sc_pid_t trigproc_pid

OS_INT_PROCESS (myint, 0)

{

sc_trigger (trigproc_pid); /* This call makes process trigproc ready */

}

/* This is the prioritized process trigproc which waits on its trigger */

SC_PROCESS (trigproc)

{

/* At process creation the value of the trigger is initialized */

/* to zero. If this is not the case you have to initialize it with */

/* the sc_triggerValueSet() system call */

for (;;)

{

sc_triggerWait(1,SC_ENDLESS_TMO); /* Process waits on the trigger */

/* Trigger was activated by process myint */

}

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CompuLab SBC-X270 Manual de usuario Pagina 74