// ----------------------------------------------------------------------------
// Start DMX communications by connecting the interface and beginning transmission
//
DMX_STATUS AbstractDMXDriver::start( const char * connection_info ) {
if ( isRunning() )
return DMX_RUNNING;
// Connect
m_connection_info = connection_info;
DMXStudio::log_status( "Starting DMX driver [%s]", m_connection_info );
DMX_STATUS status = dmx_open( m_connection_info );
if ( status != DMX_OK )
return status;
return startThread() ? DMX_OK : DMX_ERROR;
}
int main(int argc, char* argv[])
{
dmx_handler h;
int s = socket(AF_INET, SOCK_DGRAM, 0);
if(s <= 0 ){
printf("Error while opening socket, abort. %s\n", strerror(errno));
return EXIT_FAILURE;
}
struct sockaddr_in in;
in.sin_addr.s_addr = INADDR_ANY;
in.sin_port = htons(21812);
in.sin_family = AF_INET;
if( bind(s, (struct sockaddr*)&in, sizeof(in)) < 0 ){
printf("Could not bind the socket. %s\n", strerror(errno));
return EXIT_FAILURE;
}
h = dmx_open(dmx_drv_list[0], 0);
if(!h)
return EXIT_FAILURE;
do{
struct timeval before, after, timeout = { 0, 24e3 };
unsigned char dmx_data[513];
int len = 0;
/* send data at full speed rate or wait until data incoming to send to dmx */
fd_set fd;
FD_ZERO(&fd);
FD_SET(s, &fd);
gettimeofday(&before, 0);
int error = select(s+1, &fd, 0, 0, &timeout);
gettimeofday(&after, 0);
if( error == 0 )
wake_up_task("popo");
else if( error > 0 )
{
/* flush the buffer, returns only the last packet sent */
int count = 0;
struct timeval flush = { 0, 0};
FD_ZERO(&fd);
FD_SET(s, &fd);
do{
len = recv(s, dmx_data, sizeof(dmx_data), 0);
count++;
}while( select(s+1, &fd, 0, 0, &flush ) > 0 );
if( len < sizeof(dmx_data) )
printf("corrupted data receive\n");
#if 1
if( count > 1 )
printf("multiple data received %i\n", count);
#endif
struct timeval timediff;
timersub(&after, &before, &timediff);
timersub(&timeout, &timediff, &timeout);
}
dmx_data[0] = 0;
len = dmx_send(dmx_drv_list[0], h, dmx_data);
if( len != 513)
printf("send %i bytes to dmx\r", len);
}while(1);
dmx_close(dmx_drv_list[0], h);
close(s);
return EXIT_SUCCESS;
}