...
Files
os.h/os_sem.c
Prototype
| Code Block |
|---|
OS_SEM_CTR OSSemPend (OS_SEM *p_sem,
OS_TICK timeout,
OS_OPT opt,
CPU_TS *p_ts,
OS_ERR *p_err) |
Arguments
p_sem
is a pointer to the semaphore.
...
- Semaphores must be created before they are used.
Example Usage
| Code Block | ||
|---|---|---|
| ||
OS_SEM SwSem;
void DispTask (void *p_arg)
{
OS_ERR err;
CPU_TS ts;
OS_SEM_CTR ctr;
(void)&p_arg;
while (DEF_ON) {
:
:
ctr = OSSemPend(&SwSem,
0,
OS_OPT_PEND_BLOCKING,
&ts,
&err);
/* Check "err" */
:
:
}
} |