void ControlBoard::writeSerialData(QString &cmd)
{
if (serialFD < 0) {
// Try not to write if the serial port is not (yet) open
return;
}
cmd += "\r";
if (serialPort.write(cmd.toUtf8()) == -1) {
qWarning("Failed to write command to ControlBoard");
closeSerialDevice();
openSerialDevice();
}
serialPort.flush();
}
/*
* Destructor for the ControlBoard
*/
ControlBoard::~ControlBoard()
{
closeSerialDevice();
}
int main (int argc, char* argv[]) {
printf("DeckControl Test Application\n\n");
IDeckLinkIterator* deckLinkIterator;
IDeckLink* deckLink;
int numDevices = 0;
HRESULT result;
fdSerial = -1;
// Create an IDeckLinkIterator object to enumerate all DeckLink cards in the system
deckLinkIterator = CreateDeckLinkIteratorInstance();
if (deckLinkIterator == NULL)
{
fprintf(stderr, "A DeckLink iterator could not be created. The DeckLink drivers may not be installed.\n");
return 1;
}
// Enumerate all cards in this system
while (deckLinkIterator->Next(&deckLink) == S_OK)
{
CFStringRef deviceNameCFString = NULL;
// Increment the total number of DeckLink cards found
numDevices++;
if (numDevices > 1)
printf("\n\n");
// *** Print the model name of the DeckLink card
result = deckLink->GetModelName(&deviceNameCFString);
if (result == S_OK)
{
IDeckLinkAttributes* deckLinkAttributes;
char deviceName[64];
HRESULT attributeResult;
CFStringRef serialName;
bool serialSupported;
CFStringGetCString(deviceNameCFString, deviceName, sizeof(deviceName), kCFStringEncodingMacRoman);
printf("Found Blackmagic device: %s\n", deviceName);
attributeResult = deckLink->QueryInterface(IID_IDeckLinkAttributes, (void**)&deckLinkAttributes);
if (attributeResult != S_OK)
{
fprintf(stderr, "Could not obtain the IDeckLinkAttributes interface");
}
else
{
attributeResult = deckLinkAttributes->GetFlag(BMDDeckLinkHasSerialPort, &serialSupported); // are serial ports supported on device?
if (attributeResult == S_OK && serialSupported)
{
attributeResult = deckLinkAttributes->GetString(BMDDeckLinkSerialPortDeviceName, &serialName); // get serial port name
if (attributeResult == S_OK)
{
char portName[64];
CFStringGetCString(serialName, portName, sizeof(portName), kCFStringEncodingMacRoman);
printf("Serial port name: %s\n",portName);
if (openSerialDevice((char*)&portName)== true) // open serial port
{
printf("Device opened\n");
playCommand(); // Play deck,
printf("Delay 3 seconds\n");
sleep(3);
timeCodeCommand(); // DisplayTC
printf("Delay 3 seconds\n");
sleep(3);
stopCommand(); // Stop deck
closeSerialDevice(); // close serial port
}
else printf("Device open fail\n");
CFRelease(serialName);
}
else printf("Unable to get serial port device name\n");
}
else printf("Serial port not supported\n");
}
CFRelease(deviceNameCFString); // Release the IDeckLink instance when we've finished with it to prevent leaks
}
deckLink->Release();
}
if (deckLinkIterator) deckLinkIterator->Release();
// If no DeckLink cards were found in the system, inform the user
if (numDevices == 0)
printf("No Blackmagic Design devices were found.\n");
printf("\n");
return 0;
}
bool openSerialDevice(char* serialName)
{
struct termios options;
long dataLat;
bool serialOpen = false;
if (serialName) printf("Opening serial port: %s\n",serialName);
else return false;
if (deviceConnected)
return true; // device already connected
if ((fdSerial = open(serialName, O_RDWR | O_NOCTTY | O_NDELAY)) < 0)
goto bail;
printf("Port opened\n");
// Obtain exclusive access
if (ioctl(fdSerial, TIOCEXCL, 0) == -1)
{
close(fdSerial);
fdSerial = -1;
printf("Port closed\n");
goto bail;
}
serialOpen = true;
if (fcntl(fdSerial, F_SETFL, 0) == -1)
goto bail;
// Get the current options and save them for later reset
if (tcgetattr(fdSerial, &originalSerialDeviceAttributes) == -1)
goto bail;
// Set raw input
// These options are documented in the man page for termios
// (in Terminal enter: man termios)
options.c_cflag = (CS8 | PARENB | PARODD | CSTOPB | CLOCAL | CREAD);
options.c_iflag = (IGNBRK | IGNPAR);
options.c_lflag = (originalSerialDeviceAttributes.c_lflag & ~(ICANON | ECHO | ECHOE | ISIG));
options.c_oflag = (originalSerialDeviceAttributes.c_oflag & ~OPOST);
// There is no minimum number of bytes to wait for read() to return, nor is
// there a minimum time that we should wait for a response from the VTR.
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = 1;
// Set the speed to 38.4 k baud
options.c_ispeed = B38400;
options.c_ospeed = B38400;
// Set the options
if (tcsetattr(fdSerial, TCSANOW, &options) == -1)
goto bail;
// Set the data read latency
dataLat = 5;
ioctl(fdSerial, IOSSDATALAT, &dataLat);
deviceConnected = true;
bail:
if (!deviceConnected)
{
if (serialOpen)
closeSerialDevice();
printf("we've bailed\n");
}
return deviceConnected;
}
