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Files
os.h/os_tmr.c
Prototype
| Code Block |
|---|
void OSTmrCreate (OS_TMR *p_tmr,
CPU_CHAR *p_name,
OS_TICK dly,
OS_TICK period,
OS_OPT opt,
OS_TMR_CALLBACK_PTR p_callback,
void *p_callback_arg,
OS_ERR *p_err) |
Arguments
p_tmr
is a pointer to the timer-control block of the desired timer. It is assumed that storage for the timer will be allocated in the application. In other words, you should declare a “global” variable as follows, and pass a pointer to this variable to OSTmrCreate():
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- Do not call this function from an ISR.
- The timer is not started when it is created. To start the timer, simply call
OSTmrStart(). - Do not make blocking calls within callback functions.
- Keep callback functions as short as possible.
Example Usage
| Code Block | ||
|---|---|---|
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OS_TMR CloseDoorTmr;
void Task (void *p_arg)
{
OS_ERR err;
(void)&p_arg;
while (DEF_ON) {
OSTmrCreate(&CloseDoorTmr, /* p_tmr */
"Door close", /* p_name */
10, /* dly */
100, /* period */
OS_OPT_TMR_PERIODIC, /* opt */
DoorCloseFnct, /* p_callback */
0, /* p_callback_arg */
&err); /* p_err */
/* Check "err" */
:
:
}
}
void DoorCloseFnct (OS_TMR *p_tmr,
void *p_arg)
{
/* Close the door! */
} |