bool FTDIDMXDevice::open()
{
// Change QString to char* (not const char* note)
char *serial;
QByteArray a = m_path.toLatin1();
serial = (char*)malloc(sizeof(char) * (a.count() + 1));
memcpy(serial, a.constData(), a.count());
serial[a.count()] = 0;
#ifndef WIN32
// Windows users cannot dynamiccaly set VID/PID of harward
if (FT_SetVIDPID(m_vid, m_pid) == FT_OK &&
FT_OpenEx(serial, FT_OPEN_BY_SERIAL_NUMBER, &m_handle) == FT_OK)
{
#else
if (FT_OpenEx(serial, FT_OPEN_BY_SERIAL_NUMBER, &m_handle) == FT_OK)
{
#endif
free(serial);
if (!FT_SUCCESS(FT_ResetDevice(m_handle)))
{
qWarning() << "Unable to reset FTDI device" << m_path;
return false;
}
// Set the baud rate 12 will give us 250Kbits
if (!FT_SUCCESS(FT_SetDivisor(m_handle, 12)))
{
qWarning() << "Unable to set divisor on FTDI device"
<< m_path;
return false;
}
// Set the data characteristics
if (!FT_SUCCESS(FT_SetDataCharacteristics(m_handle,
FT_BITS_8,
FT_STOP_BITS_2,
FT_PARITY_NONE)))
{
qWarning() << "Unable to set data characteristics on"
<< "FTDI device" << m_path;
return false;
}
// Set flow control
if (!FT_SUCCESS(FT_SetFlowControl(m_handle, FT_FLOW_NONE, 0, 0)))
{
qWarning() << "Unable to set flow control on"
<< "FTDI device" << m_path;
return false;
}
// set RS485 for sendin
FT_ClrRts(m_handle);
// Clear TX RX buffers
FT_Purge(m_handle,FT_PURGE_TX | FT_PURGE_RX);
m_threadRunning = true;
start(QThread::TimeCriticalPriority);
return true;
}
else
{
qWarning() << "Unable to open FTDIDMX"
<< m_output << ":" << serial;
free(serial);
return false;
}
}
bool FTDIDMXDevice::close()
{
// Kill thread
m_threadRunning = false;
wait(500);
FT_Close(m_handle);
return true;
}
/* This internal function handles the actual FTDI init and memory alloc
for the library, with graceful cleanup in all error cases. Keeps
subsequent TCopen() function simpler with regards to error handling. */
static TCstatusCode openAlloc(
unsigned char s, /* Number of strands */
int p) /* Number of pixels in longest strand */
{
/* Parameter validation was already done in TCopen(). */
/* Function works from a presumed error condition progressing
toward success. This makes the cleanup cases easier. */
TCstatusCode status = TC_ERR_MALLOC;
/* Size of pixelOutBuffer depends whether the serial clock is
provided by one of the CBUS pins or must be bit-banged via
software. If using 8 strands, MUST use CBUS clock. */
if(s >= TC_CBUS_CLOCK)
{
bytesPerPixel = 32;
if(s > TC_CBUS_CLOCK) s -= TC_CBUS_CLOCK;
} else
{
bytesPerPixel = 64;
}
/* All library memory use is handled in one big malloc.
The data types are sorted to avoid alignment issues.
pixelOutBuffer includes latch data at end. */
if((pixelCurrent = (double *)malloc(
(s * p * sizeof(double)) + /* pixelCurrent array + */
((p+((p+63)/64)) * bytesPerPixel)))) /* pixelOutBuffer */
{
pixelOutBuffer = (unsigned char *)&pixelCurrent[s * p];
/* Alloc successful. Next phase... */
status = TC_ERR_OPEN;
/* Currently rigged for a single FTDI device,
and always index 0. Might address this in
a future update if it's an issue. */
if(FT_OK == FT_Open(0,&ftdiHandle))
{
status = TC_ERR_MODE;
/* Currently hogs all pins as outputs,
whether they're used by strands or not. */
if(FT_OK == FT_SetBitMode(ftdiHandle,255,1))
{
status = TC_OK; /* Tentative success */
/* Try to set baud rate & divisor to non-
default values. 3090000 seems to be the
absolute max baud rate; even +1 more, and
it fails. Failure of either of these
steps returns a warning but does not
abort; program can continue with default
baud rate setting. FTDI docs suggest max
of 3000000; this may be pushing it. */
if(FT_OK != FT_SetDivisor(ftdiHandle,1))
status = TC_ERR_DIVISOR;
if(FT_OK != FT_SetBaudRate(ftdiHandle,3090000))
status = TC_ERR_BAUDRATE;
/* Clear any lingering data in queue. */
(void)FT_Purge(ftdiHandle,
FT_PURGE_RX | FT_PURGE_TX);
return status; /* Success */
}
/* Else fatal error of some sort.
Clean up any interim results. */
FT_Close(ftdiHandle);
}
ftdiHandle = NULL;
free(pixelCurrent);
pixelCurrent = NULL;
pixelOutBuffer = NULL;
}
return status; /* Fail */
}
int dev_open_uart (int n_dev_indx, FT_HANDLE *ph_device)
{
FT_STATUS ft_status;
DWORD dw_num_devs;
LONG devLocation;
ft_status = FT_ListDevices(&dw_num_devs, NULL, FT_LIST_NUMBER_ONLY);
if (ft_status != FT_OK) return FALSE;
if (dw_num_devs == 0){
// No devices were found
return FALSE;
}
ft_status = FT_ListDevices((void*)n_dev_indx, &devLocation, FT_LIST_BY_INDEX | FT_OPEN_BY_LOCATION);
if (ft_status != FT_OK) {
return FALSE;
}
ft_status |= FT_ListDevices((void*)n_dev_indx, &devDescriptor, FT_LIST_BY_INDEX | FT_OPEN_BY_DESCRIPTION);
ft_status |= FT_ListDevices((void*)n_dev_indx, &devSerial, FT_LIST_BY_INDEX | FT_OPEN_BY_SERIAL_NUMBER);
if (ft_status != FT_OK){
return FALSE;
}
#define FT_Classic 0
#if FT_Classic
ft_status |= FT_OpenEx((void*)devLocation, FT_OPEN_BY_LOCATION, ph_device);
ft_status |= FT_SetTimeouts(*ph_device, 500, 500);
ft_status |= FT_SetLatencyTimer(*ph_device, 2);
// Divisor selection
// BAUD = 3000000 / Divisor
// Divisor = (N + 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875)
// Divisor = 24 ==> Baud 125000
ft_status |= FT_SetDivisor(*ph_device, 3000000 / 125000);
// Set UART format 8N1
ft_status |= FT_SetDataCharacteristics(*ph_device, FT_BITS_8, FT_STOP_BITS_1, FT_PARITY_NONE);
if (ft_status != FT_OK){
return FALSE;
}
// Just in case
FT_Purge(*ph_device, FT_PURGE_TX | FT_PURGE_RX);
#else
// Open a device for overlapped I/O using its serial number
*ph_device = FT_W32_CreateFile(
(LPCTSTR)devLocation,
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED | FT_OPEN_BY_LOCATION,
0);
if (*ph_device == INVALID_HANDLE_VALUE)
{
// FT_W32_CreateDevice failed
return FALSE;
}
// ----------------------------------------
// --- Set comm parameters
// ----------------------------------------
FTDCB ftDCB;
FTTIMEOUTS ftTimeouts;
FTCOMSTAT ftPortStatus;
DWORD dw_port_error;
if (!FT_W32_GetCommState(*ph_device, &ftDCB))
{
return FALSE;
}
// Divisor selection
// BAUD = 3000000 / Divisor
// Divisor = (N + 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875)
// Divisor = 24 ==> Baud 125000
ftDCB.BaudRate = 38400;
ftDCB.fBinary = TRUE; /* Binary Mode (skip EOF check) */
ftDCB.fParity = FALSE; /* Enable parity checking */
ftDCB.fOutxCtsFlow = FALSE; /* CTS handshaking on output */
ftDCB.fOutxDsrFlow = FALSE; /* DSR handshaking on output */
ftDCB.fDtrControl = DTR_CONTROL_DISABLE; /* DTR Flow control */
ftDCB.fTXContinueOnXoff = FALSE;
ftDCB.fErrorChar = FALSE; // enable error replacement
ftDCB.fNull = FALSE; // enable null stripping
ftDCB.fRtsControl = RTS_CONTROL_DISABLE; // RTS flow control
ftDCB.fAbortOnError = TRUE; // abort reads/writes on error
ftDCB.fOutX = FALSE; /* Enable output X-ON/X-OFF */
ftDCB.fInX = FALSE; /* Enable input X-ON/X-OFF */
ftDCB.fNull = FALSE; /* Enable Null stripping */
ftDCB.fRtsControl = RTS_CONTROL_DISABLE; /* Rts Flow control */
ftDCB.fAbortOnError = TRUE; /* Abort all reads and writes on Error */
// 8N1
ftDCB.ByteSize = 8; /* Number of bits/byte, 4-8 */
ftDCB.Parity = NOPARITY; /* 0-4=None,Odd,Even,Mark,Space */
ftDCB.StopBits = ONESTOPBIT; /* 0,1,2 = 1, 1.5, 2 */
if (!FT_W32_SetCommState(*ph_device, &ftDCB))
{
return FALSE;
}
FT_W32_GetCommState(*ph_device, &ftDCB);
// Set serial port Timeout values
FT_W32_GetCommTimeouts(*ph_device, &ftTimeouts);
ftTimeouts.ReadIntervalTimeout = 0;
ftTimeouts.ReadTotalTimeoutMultiplier = 0;
ftTimeouts.ReadTotalTimeoutConstant = 200;
ftTimeouts.WriteTotalTimeoutConstant = 0;
ftTimeouts.WriteTotalTimeoutMultiplier = 0;
FT_W32_SetCommTimeouts(*ph_device, &ftTimeouts);
FT_W32_ClearCommError(*ph_device, &dw_port_error, &ftPortStatus);
FT_W32_PurgeComm(*ph_device, PURGE_TXCLEAR | PURGE_RXCLEAR | PURGE_RXABORT | PURGE_TXABORT);
#endif // End of W32 device init
return TRUE;
}
