219 lines
7 KiB
Text
219 lines
7 KiB
Text
/**
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* \defgroup coojacore COOJA Simulator Core
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* @{
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*/
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/**
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* \file
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* C code template for generating contiki source code files from COOJA
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* Simulator. This file should not be compiled directly.
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* \author
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* Fredrik Osterlind <fros@sics.se>
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \page coojacore COOJA Simulator Core
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*
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* COOJA Simulator Core ("the Core") represents the entire C code part of COOJA
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* Simulator.
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* This part shortly consists of simulated sensors and actuators and code for
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* communicating with the Java part.
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*
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* Communication with the Core should always be handled via dedicated classes
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* (MoteType), and never directly. MoteType works as an interface giving access
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* to variable's values given their name (through CoreComm->Lib?).
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*
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*/
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#include <jni.h>
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#include <stdio.h>
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#include <string.h>
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#include "contiki.h"
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#include "contiki-net.h"
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#include "contiki-lib.h"
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#include "contiki-conf.h"
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#include "sys/clock.h"
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#include "lib/simEnvChange.h"
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#include "lib/sensors.h"
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#include "net/uip.h"
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#include "dev/radio-arch.h"
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#include "sys/etimer.h"
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/* Declare all initialization processes */
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[PROCESS_DEFINITIONS]
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/* Declare all sensors */
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[SENSOR_DEFINITIONS]
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/* Declare all simulation interfaces */
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[INTERFACE_DEFINITIONS]
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/* Create initialization process array */
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[PROCESS_ARRAY]
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/* Create sensor array */
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[SENSOR_ARRAY]
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/* Create simulation interfaces array */
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[INTERFACE_ARRAY]
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// Default network interface
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static struct uip_fw_netif simNetworkIF =
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{UIP_FW_NETIF(0,0,0,0, 0,0,0,0, simDoSend)};
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/*
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* referenceVar is used for comparing absolute and process relative memory.
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* (this must not be static due to memory locations)
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*/
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int referenceVar;
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extern unsigned long _end;
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Initialize a mote by starting processes etc.
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*
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* This function initializes a mote by starting certain
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* processes and setting up the environment.
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*
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* This is a JNI function and should only be called via the
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* responsible Java part (MoteType.java).
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*/
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JNIEXPORT void JNICALL
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Java_se_sics_cooja_corecomm_[CLASS_NAME]_init(JNIEnv *env, jobject obj)
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{
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/* Initialize random generator */
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random_init(0);
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/* Start process handler */
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process_init();
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/* Start Contiki processes */
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procinit_init();
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/* Initialize uIP */
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uip_init();
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uip_fw_init();
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/* Register network interface */
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uip_fw_default(&simNetworkIF);
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/* Start user applications */
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autostart_start((struct process **) autostart_processes);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Get a segment from the process memory.
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* \param start Start address of segment
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* \param length Size of memory segment
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* \return Java byte array containing a copy of memory segment.
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*
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* Fetches a memory segment from the process memory starting at
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* (start), with size (length). This function does not perform
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* ANY error checking, and the process may crash if addresses are
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* not available/readable.
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*
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* This is a JNI function and should only be called via the
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* responsible Java part (MoteType.java).
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*/
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JNIEXPORT jbyteArray JNICALL
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Java_se_sics_cooja_corecomm_[CLASS_NAME]_getMemory(JNIEnv *env, jobject obj, jint start, jint length)
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{
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jbyteArray ret=(*env)->NewByteArray(env, length);
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(*env)->SetByteArrayRegion(env, ret, 0, (size_t) length, (jbyte *) start);
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return (ret);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Replace a segment of the process memory with given byte array.
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* \param start Start address of segment
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* \param length Size of memory segment
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* \param mem_arr Byte array contaning new memory
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*
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* Replaces a process memory segment with given byte array.
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* This function does not perform ANY error checking, and the
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* process may crash if addresses are not available/writable.
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*
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* This is a JNI function and should only be called via the
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* responsible Java part (MoteType.java).
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*/
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JNIEXPORT void JNICALL
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Java_se_sics_cooja_corecomm_[CLASS_NAME]_setMemory(JNIEnv *env, jobject obj, jint start, jint length, jbyteArray mem_arr)
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{
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jbyte *mem = (*env)->GetByteArrayElements(env, mem_arr, 0);
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memcpy((void *) start, mem, length);
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(*env)->ReleaseByteArrayElements(env, mem_arr, mem, 0);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Let mote execute one "block" of code (tick mote).
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*
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* Let mote defined by the active contiki processes and current
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* process memory execute some program code. This code must not block
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* or else this function will never return. A typical contiki
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* process will return when it executes PROCESS_WAIT..() statements.
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*
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* Before the control is left to contiki processes, any messages
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* from the Java part are handled. These may for example be
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* incoming network data. After the contiki processes return control,
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* messages to the Java part are also handled (those which may need
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* special attention).
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*
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* This is a JNI function and should only be called via the
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* responsible Java part (MoteType.java).
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*/
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JNIEXPORT void JNICALL
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Java_se_sics_cooja_corecomm_[CLASS_NAME]_tick(JNIEnv *env, jobject obj)
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{
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/* Let all simulation interfaces act first */
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doActionsBeforeTick();
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/* Check if any e-timers are pending (save result for state decisions) */
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if (etimer_pending()) {
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/* Poll etimers */
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etimer_request_poll();
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simEtimerPending = 1;
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} else {
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simEtimerPending = 0;
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}
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/* Execute the contiki code (save process_run return value for state decisions) */
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simProcessRunValue = process_run();
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/* Let all simulation interfaces act before returning to java */
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doActionsAfterTick();
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/* Look for new e-timers */
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if (!simEtimerPending && etimer_pending()) {
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/* Poll etimers */
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etimer_request_poll();
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simEtimerPending = 1;
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}
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/* Save nearest event timer expiration time (0 if no timers) */
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simNextExpirationTime = etimer_next_expiration_time();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Get the absolute memory address of a special variable.
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* \return Absolute memory address.
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*
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* Returns the absolute memory address of a special variable
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* "referenceVar". By comparing this address with the relative
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* address (from the map file) for referenceVar, an runtime offset
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* can be calculated.
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*
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* This is a JNI function and should only be called via the
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* responsible Java part (MoteType.java).
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*/
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JNIEXPORT jint JNICALL
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Java_se_sics_cooja_corecomm_[CLASS_NAME]_getReferenceAbsAddr(JNIEnv *env, jobject obj)
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{
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return (jint) &referenceVar;
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}
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/** @} */
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