// Distributed control system: sensor node//// Samples the plant periodically and sends the samples to the // controller node.#define S_FUNCTION_NAME sensor_init#include "ttkernel.cpp"// code functiondouble sensor_code(int seg, void *data) {  static double *y;  switch (seg) {  case 1:    y = new double;    *y = ttAnalogIn(1);    return 0.0005;  case 2:    ttSendMsg(4, y, 10); // Send measurement (10 bytes) to node 4 (controller)    return 0.0004;  case 3:    return FINISHED;  }}double msgRcvhandler(int seg, void *data){  printf("ERROR: sensor received a message!\n");  return FINISHED;}void init(){  // Initialize TrueTime kernel  ttInitKernel(1, 0, FP); // nbrOfInputs, nbrOfOutputs, fixed priority  // Sensor task  double offset = 0.0;  double period = 0.010;  double prio = 1.0;  ttCreatePeriodicTask("sensor_task", offset, period, prio, sensor_code);  // Initialize network  ttCreateInterruptHandler("msgRcv", prio, msgRcvhandler);  ttInitNetwork(3, "msgRcv"); // node #3 in the network}void cleanup() {}