66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
|
|
* This file contains an example of how to call a service.
|
|
*
|
|
* This program implements a process that calls the service defined in
|
|
* example-service.h every second.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "contiki.h"
|
|
|
|
/*
|
|
* We must include the header file for the service.
|
|
*/
|
|
#include "example-service.h"
|
|
|
|
/*
|
|
* All Contiki programs must have a process, and we declare it here.
|
|
*/
|
|
PROCESS(example_use_service_process, "Use example");
|
|
|
|
/*
|
|
* The program is to call the service once every second, so we use an
|
|
* event timer in order to run every second.
|
|
*/
|
|
static struct etimer timer;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* Here we implement the process.
|
|
*/
|
|
PROCESS_THREAD(example_use_service_process, ev, data)
|
|
{
|
|
/*
|
|
* A process thread starts with PROCESS_BEGIN() and ends with
|
|
* PROCESS_END().
|
|
*/
|
|
PROCESS_BEGIN();
|
|
|
|
/*
|
|
* We loop for ever, calling the service once every second.
|
|
*/
|
|
while(1) {
|
|
|
|
/*
|
|
* We set a timer that wakes us up once every second.
|
|
*/
|
|
etimer_set(&timer, CLOCK_SECOND);
|
|
PROCESS_YIELD_UNTIL(etimer_expired(&timer));
|
|
|
|
/*
|
|
* We call the service. If the service is not registered, the
|
|
* SERVICE_CALL() statement does nothing. If we need to know if
|
|
* the service exists, we can use the SERVICE_FIND() function.
|
|
*/
|
|
printf("use example: calling example\n");
|
|
SERVICE_CALL(example_service, example_function());
|
|
}
|
|
|
|
/*
|
|
* And finally the process ends.
|
|
*/
|
|
PROCESS_END();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|