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