void Director::ReceiveSignal(ISystemModule *module, unsigned int signal, void *data)
{
int from = module->GetSerial();
if (m_World->GetSerial() != from) {
return;
}
if (signal != 3) {
return;
}
if (!m_World) {
m_System->Printf("Director::ReceiveSignal: world == NULL\n");
return;
}
frame_t frame;
m_World->GetUncompressedFrame(m_World->GetLastFrame()->seqnr, &frame);
AnalyseFrame(&frame);
}
/* main function is a recv-thread, it is used to receive messages *
* sending from the senrver. *
* if it receives a control-message, it will set needsendACK = 1 *
* (to tell send thread that he should send an ACK to the server *
* saying "got it"). *
* if receive a ACK message, it will set haverecvACK = 1, to let *
* the send thread knows that the server had received a temperature *
* message. */
int main()
{
pthread_t sendthread, sendACKthread;
char recvframe[MAX_FRAME_SIZE] = "ABCDEFG";
// char *device = "/dev/ttyAMA0";
// char *device = "/dev/ttyUSB0";
char *device = "/dev/pts/4";
fre = 1;
stop = 0;
haverecvACK = 0;
needsendACK = 0;
pthread_mutex_init(&stop_mutex, NULL);
pthread_mutex_init(&fre_mutex, NULL);
pthread_mutex_init(&have_recv_ack_mutex, NULL);
pthread_mutex_init(&need_send_ack_mutex, NULL);
fd = OpenPort(device);
if(fd < 0) return -1;
pthread_create(&sendthread, NULL, (void *)&SendThreadFun, NULL);
pthread_create(&sendACKthread, NULL, (void *)&SendACKFun, NULL);
while(stop != 1)
{
/*receive a frame and analyse it*/
RecvFrame(fd, recvframe);
int recvmode = AnalyseFrame(recvframe);
if(recvmode == 0)
{
printf("recv: ACK\n");
pthread_mutex_lock(&have_recv_ack_mutex);
haverecvACK = 1;
show_state();
pthread_mutex_unlock(&have_recv_ack_mutex);
}
/* if it receives a frequency-message, it will set needsendACK = 1 *
* (to tell send thread that he should send an ACK to the server *
* saying "got it"). */
if(recvmode == 2 )
{
printf("recv: change frequency %d\n", fre);
char delayAscii[7];
/*extract the number from the recv frame */
memcpy(delayAscii, recvframe + 3, 6);
delayAscii[6] = '\0';
pthread_mutex_lock(&fre_mutex);
fre = atol((const char *) delayAscii);
pthread_mutex_unlock(&fre_mutex);
pthread_mutex_lock(&need_send_ack_mutex);
needsendACK = 1;
show_state();
pthread_mutex_unlock(&need_send_ack_mutex);
}
/* if it receives a stop-message, it will set needsendACK = 1 *
* (to tell send thread that he should send an ACK to the server *
* saying "got it"). */
if(recvmode == 3)
{
printf("recv: STOP!\n");
pthread_mutex_lock(&stop_mutex);
stop = 1;
pthread_mutex_unlock(&stop_mutex);
pthread_mutex_lock(&need_send_ack_mutex);
needsendACK = 1;
show_state();
pthread_mutex_unlock(&need_send_ack_mutex);
}
memset(recvframe, '\0', MAX_FRAME_SIZE);
//usleep(500000);
}
pthread_join(sendthread, NULL);
pthread_join(sendACKthread, NULL);
return 0;
}
