def __init__(self, sDevice, aMode):
oDCB = win32file.GetCommState(self._oFd)
dParity = {
'N': win32file.NOPARITY,
'E': win32file.EVENPARITY,
'O': win32file.ODDPARITY
}
dStop = {1: win32file.ONESTOPBIT, 2: win32file.TWOSTOPBITS}
oDCB.BaudRate = aMode[0]
oDCB.Parity = dParity[aMode[1]]
oDCB.ByteSize = aMode[2]
oDCB.StopBits = dStop[aMode[3]]
oDCB.fBinary = 1
oDCB.fParity = 1
oDCB.fOutxCtsFlow = 0
oDCB.fOutxDsrFlow = 0
oDCB.fDtrControl = win32file.DTR_CONTROL_DISABLE
oDCB.fDsrSensitivity = 0
oDCB.fTXContinueOnXoff = 0
oDCB.fOutX = 0
oDCB.fInX = 0
oDCB.fErrorChar = 0
oDCB.fNull = 0
oDCB.fRtsControl = win32file.RTS_CONTROL_ENABLE
oDCB.fAbortOnError = 0
win32file.SetCommState(self._oFd, oDCB)
self.RxTimeOut = 1000
self.TxTimeOut = 1000
def readuntil(self, char):
"read bytes from serial port until char is hit"
if not self.hComPort: raise portNotOpenError
print thetime(), "readuntil entered"
overlapped = win32file.OVERLAPPED()
overlapped.hEvent = win32event.CreateEvent(None, 1, 0, None)
dcb = win32file.GetCommState(self.hComPort)
oldevt = dcb.EvtChar
dcb.EvtChar = char
rc = win32file.SetCommState(self.hComPort, dcb)
print thetime(), "setcommstate returned", rc
oldmask = win32file.GetCommMask(self.hComPort)
rc = win32file.SetCommMask(self.hComPort, win32file.EV_RXFLAG)
print thetime(), "setcommmask returned", rc
rc, mask = win32file.WaitCommEvent(self.hComPort, overlapped)
print thetime(), "waitcommevent returned", rc, mask
rc = win32event.WaitForSingleObject(overlapped.hEvent, 10000)
print thetime(), "waitforsingleobject returned", rc
n = win32file.GetOverlappedResult(self.hComPort, overlapped, 0)
print thetime(), "getoverlappedresult returned", n
win32file.SetCommMask(self.hComPort, oldmask)
flags, comstat = win32file.ClearCommError(self.hComPort)
print thetime(), "clearcommerror", flags, comstat.cbInQue
rc, buf = win32file.ReadFile(
self.hComPort, win32file.AllocateReadBuffer(comstat.cbInQue),
overlapped)
print thetime(), "readfile retrurned", rc
n = win32file.GetOverlappedResult(self.hComPort, overlapped, 1)
print thetime(), "getoverlappedresult returned", n
read = str(buf[:n])
return read
def setBaudrate(self, baudrate):
"""change baudrate after port is open"""
if not self.hComPort: raise portNotOpenError
# Setup the connection info.
# Get state and modify it:
comDCB = win32file.GetCommState(self.hComPort)
comDCB.BaudRate = baudrate
win32file.SetCommState(self.hComPort, comDCB)
def setDTR(self,level=1):
if not self.hComPort: raise portNotOpenError
comDCB = win32file.GetCommState(self.hComPort)
if level:
comDCB.fDtrControl = win32file.DTR_CONTROL_ENABLE;
else:
comDCB.fDtrControl = win32file.DTR_CONTROL_DISABLE;
win32file.SetCommState(self.hComPort, comDCB)
def setRTS(self,level=1):
"""set terminal status line"""
if not self.hComPort: raise portNotOpenError
comDCB = win32file.GetCommState(self.hComPort)
if level:
comDCB.fRtsControl = win32file.RTS_CONTROL_ENABLE;
else:
comDCB.fRtsControl = win32file.RTS_CONTROL_DISABLE;
win32file.SetCommState(self.hComPort, comDCB)
def applyCharFormat(self):
# Setup the connection info.
# Get state and modify it:
comDCB = win32file.GetCommState(self.hComPort)
# comDCB.BaudRate = baudrate
if self.bytesize == FIVEBITS:
comDCB.ByteSize = 5
elif self.bytesize == SIXBITS:
comDCB.ByteSize = 6
elif self.bytesize == SEVENBITS:
comDCB.ByteSize = 7
elif self.bytesize == EIGHTBITS:
comDCB.ByteSize = 8
if self.parity == PARITY_NONE:
comDCB.Parity = win32file.NOPARITY
comDCB.fParity = 0 # Dis/Enable Parity Check
elif self.parity == PARITY_EVEN:
comDCB.Parity = win32file.EVENPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
elif self.parity == PARITY_ODD:
comDCB.Parity = win32file.ODDPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
if self.stopbits == STOPBITS_ONE:
comDCB.StopBits = win32file.ONESTOPBIT
elif self.stopbits == STOPBITS_TWO:
comDCB.StopBits = win32file.TWOSTOPBITS
comDCB.fBinary = 1 # Enable Binary Transmission
# Char. w/ Parity-Err are replaced with 0xff (if fErrorChar is set to TRUE)
#if self.rtscts:
# comDCB.fRtsControl = win32file.RTS_CONTROL_HANDSHAKE
# comDCB.fDtrControl = win32file.DTR_CONTROL_HANDSHAKE
#else:
# comDCB.fRtsControl = win32file.RTS_CONTROL_ENABLE
# comDCB.fDtrControl = win32file.DTR_CONTROL_ENABLE
#comDCB.fOutxCtsFlow = self.rtscts
#comDCB.fOutxDsrFlow = self.rtscts
#comDCB.fOutX = self.xonxoff
#comDCB.fInX = self.xonxoff
#comDCB.fNull = 0
#comDCB.fErrorChar = 0
#comDCB.fAbortOnError = 0
win32file.SetCommState(self.hComPort, comDCB)
class Serial(serialutil.FileLike):
def __init__(
self,
port, #number of device, numbering starts at
#zero. if everything fails, the user
#can specify a device string, note
#that this isn't portable anymore
baudrate=9600, #baudrate
bytesize=EIGHTBITS, #number of databits
parity=PARITY_NONE, #enable parity checking
stopbits=STOPBITS_ONE, #number of stopbits
timeout=None, #set a timeout value, None for waiting forever
xonxoff=0, #enable software flow control
rtscts=0, #enable RTS/CTS flow control
):
"""initialize comm port"""
self.timeout = timeout
if type(port) == type(''): #strings are taken directly
self.portstr = port
else:
# CSS 20040528 - open wasn't working for COM10 and greater, but by
# chance the '\\.\COM10' format seems to work, yay! But, only use
# if for COM10 and greater in case it introduces some other
# incompatibility.
if port < 9:
self.portstr = 'COM%d' % (
port + 1) #numbers are transformed to a string
else:
self.portstr = '\\\\.\\COM%d' % (port + 1) #WIN NT format??
try:
self.hComPort = win32file.CreateFile(
self.portstr,
win32con.GENERIC_READ | win32con.GENERIC_WRITE,
0, # exclusive access
None, # no security
win32con.OPEN_EXISTING,
win32con.FILE_ATTRIBUTE_NORMAL | win32con.FILE_FLAG_OVERLAPPED,
None)
except Exception, msg:
self.hComPort = None #'cause __del__ is called anyway
raise serialutil.SerialException, "could not open port: %s" % msg
# Setup a 4k buffer
win32file.SetupComm(self.hComPort, 4096, 4096)
#Save original timeout values:
self.orgTimeouts = win32file.GetCommTimeouts(self.hComPort)
#Set Windows timeout values
#timeouts is a tuple with the following items:
#(ReadIntervalTimeout,ReadTotalTimeoutMultiplier,
# ReadTotalTimeoutConstant,WriteTotalTimeoutMultiplier,
# WriteTotalTimeoutConstant)
if timeout is None:
timeouts = (0, 0, 0, 0, 0)
elif timeout == 0:
timeouts = (win32con.MAXDWORD, 0, 0, 0, 0)
else:
#timeouts = (0, 0, 0, 0, 0) #timeouts are done with WaitForSingleObject
#timeouts = (win32con.MAXDWORD, 0, 0, 0, 1000) #doesn't works
#timeouts = (timeout*1000, 0, timeout*1000, 0, 0)
timeouts = (0, 0, timeout * 1000, 0, timeout * 1000)
win32file.SetCommTimeouts(self.hComPort, timeouts)
#win32file.SetCommMask(self.hComPort, win32file.EV_RXCHAR | win32file.EV_TXEMPTY |
# win32file.EV_RXFLAG | win32file.EV_ERR)
win32file.SetCommMask(
self.hComPort,
win32file.EV_RXCHAR | win32file.EV_RXFLAG | win32file.EV_ERR)
#win32file.SetCommMask(self.hComPort, win32file.EV_ERR)
# Setup the connection info.
# Get state and modify it:
comDCB = win32file.GetCommState(self.hComPort)
comDCB.BaudRate = baudrate
if bytesize == FIVEBITS:
comDCB.ByteSize = 5
elif bytesize == SIXBITS:
comDCB.ByteSize = 6
elif bytesize == SEVENBITS:
comDCB.ByteSize = 7
elif bytesize == EIGHTBITS:
comDCB.ByteSize = 8
if parity == PARITY_NONE:
comDCB.Parity = win32file.NOPARITY
comDCB.fParity = 0 # Dis/Enable Parity Check
elif parity == PARITY_EVEN:
comDCB.Parity = win32file.EVENPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
elif parity == PARITY_ODD:
comDCB.Parity = win32file.ODDPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
if stopbits == STOPBITS_ONE:
comDCB.StopBits = win32file.ONESTOPBIT
elif stopbits == STOPBITS_TWO:
comDCB.StopBits = win32file.TWOSTOPBITS
comDCB.fBinary = 1 # Enable Binary Transmission
# Char. w/ Parity-Err are replaced with 0xff (if fErrorChar is set to TRUE)
if rtscts:
comDCB.fRtsControl = win32file.RTS_CONTROL_HANDSHAKE
comDCB.fDtrControl = win32file.DTR_CONTROL_HANDSHAKE
else:
comDCB.fRtsControl = win32file.RTS_CONTROL_ENABLE
comDCB.fDtrControl = win32file.DTR_CONTROL_ENABLE
comDCB.fOutxCtsFlow = rtscts
comDCB.fOutxDsrFlow = rtscts
comDCB.fOutX = xonxoff
comDCB.fInX = xonxoff
comDCB.fNull = 0
comDCB.fErrorChar = 0
comDCB.fAbortOnError = 0
win32file.SetCommState(self.hComPort, comDCB)
# Clear buffers:
# Remove anything that was there
win32file.PurgeComm(
self.hComPort, win32file.PURGE_TXCLEAR | win32file.PURGE_TXABORT
| win32file.PURGE_RXCLEAR | win32file.PURGE_RXABORT)
def _reconfigurePort(self):
"""Set communication parameters on opened port."""
if not self.hComPort:
raise SerialException("Can only operate on a valid port handle")
#Set Windows timeout values
#timeouts is a tuple with the following items:
#(ReadIntervalTimeout,ReadTotalTimeoutMultiplier,
# ReadTotalTimeoutConstant,WriteTotalTimeoutMultiplier,
# WriteTotalTimeoutConstant)
if self._timeout is None:
timeouts = (0, 0, 0, 0, 0)
elif self._timeout == 0:
timeouts = (win32con.MAXDWORD, 0, 0, 0, 0)
else:
timeouts = (0, 0, int(self._timeout*1000), 0, 0)
if self._timeout != 0 and self._interCharTimeout is not None:
timeouts = (int(self._interCharTimeout * 1000),) + timeouts[1:]
if self._writeTimeout is None:
pass
elif self._writeTimeout == 0:
timeouts = timeouts[:-2] + (0, win32con.MAXDWORD)
else:
timeouts = timeouts[:-2] + (0, int(self._writeTimeout*1000))
win32file.SetCommTimeouts(self.hComPort, timeouts)
win32file.SetCommMask(self.hComPort, win32file.EV_ERR)
# Setup the connection info.
# Get state and modify it:
comDCB = win32file.GetCommState(self.hComPort)
comDCB.BaudRate = self._baudrate
if self._bytesize == FIVEBITS:
comDCB.ByteSize = 5
elif self._bytesize == SIXBITS:
comDCB.ByteSize = 6
elif self._bytesize == SEVENBITS:
comDCB.ByteSize = 7
elif self._bytesize == EIGHTBITS:
comDCB.ByteSize = 8
else:
raise ValueError("Unsupported number of data bits: %r" % self._bytesize)
if self._parity == PARITY_NONE:
comDCB.Parity = win32file.NOPARITY
comDCB.fParity = 0 # Dis/Enable Parity Check
elif self._parity == PARITY_EVEN:
comDCB.Parity = win32file.EVENPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
elif self._parity == PARITY_ODD:
comDCB.Parity = win32file.ODDPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
elif self._parity == PARITY_MARK:
comDCB.Parity = win32file.MARKPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
elif self._parity == PARITY_SPACE:
comDCB.Parity = win32file.SPACEPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
else:
raise ValueError("Unsupported parity mode: %r" % self._parity)
if self._stopbits == STOPBITS_ONE:
comDCB.StopBits = win32file.ONESTOPBIT
elif self._stopbits == STOPBITS_TWO:
comDCB.StopBits = win32file.TWOSTOPBITS
else:
raise ValueError("Unsupported number of stop bits: %r" % self._stopbits)
comDCB.fBinary = 1 # Enable Binary Transmission
# Char. w/ Parity-Err are replaced with 0xff (if fErrorChar is set to TRUE)
if self._rtscts:
comDCB.fRtsControl = win32file.RTS_CONTROL_HANDSHAKE
else:
comDCB.fRtsControl = self._rtsState
if self._dsrdtr:
comDCB.fDtrControl = win32file.DTR_CONTROL_HANDSHAKE
else:
comDCB.fDtrControl = self._dtrState
comDCB.fOutxCtsFlow = self._rtscts
comDCB.fOutxDsrFlow = self._dsrdtr
comDCB.fOutX = self._xonxoff
comDCB.fInX = self._xonxoff
comDCB.fNull = 0
comDCB.fErrorChar = 0
comDCB.fAbortOnError = 0
comDCB.XonChar = XON
comDCB.XoffChar = XOFF
try:
win32file.SetCommState(self.hComPort, comDCB)
except win32file.error, e:
raise ValueError("Cannot configure port, some setting was wrong. Original message: %s" % e)
def SetBaudrate(self, Baudrate):
oDCB = win32file.GetCommState(self._oFd)
oDCB.BaudRate = Baudrate
win32file.SetCommState(self._oFd, oDCB)
def mEnableRTS(self):
oDCB = win32file.GetCommState(self._oFd)
oDCB.fRtsControl = win32file.RTS_CONTROL_ENABLE
win32file.SetCommState(self._oFd, oDCB)
def __init__(self,
port, #number of device, numbering starts at
#zero. if everything fails, the user
#can specify a device string, note
#that this isn't portable anymore
baudrate=9600, #baudrate
bytesize=EIGHTBITS, #number of databits
parity=PARITY_NONE, #enable parity checking
stopbits=STOPBITS_ONE, #number of stopbits
timeout=None, #set a timeout value, None for waiting forever
xonxoff=0, #enable software flow control
rtscts=0, #enable RTS/CTS flow control
):
"""initialize comm port"""
self.timeout = timeout
if type(port) == type(''): #strings are taken directly
self.portstr = port
else:
self.portstr = 'COM%d' % (port+1) #numbers are transformed to a string
#self.portstr = '\\\\.\\COM%d' % (port+1) #WIN NT format??
self.hComPort = win32file.CreateFile(self.portstr,
win32con.GENERIC_READ | win32con.GENERIC_WRITE,
0, # exclusive access
None, # no security
win32con.OPEN_EXISTING,
win32con.FILE_ATTRIBUTE_NORMAL | win32con.FILE_FLAG_OVERLAPPED,
None)
# Setup a 4k buffer
win32file.SetupComm(self.hComPort, 4096, 4096)
#Save original timeout values:
self.orgTimeouts = win32file.GetCommTimeouts(self.hComPort)
#Set Windows timeout values
#timeouts is a tuple with the following items:
#(ReadIntervalTimeout,ReadTotalTimeoutMultiplier,
# ReadTotalTimeoutConstant,WriteTotalTimeoutMultiplier,
# WriteTotalTimeoutConstant)
if timeout:
timeouts = (timeout*1000, 0, timeout*1000, 0, 0)
else:
#timeouts = (win32con.MAXDWORD, 1, 0, 1, 0)
timeouts = (win32con.MAXDWORD, 0, 0, 0, 1000)
win32file.SetCommTimeouts(self.hComPort, timeouts)
#win32file.SetCommMask(self.hComPort, win32file.EV_RXCHAR | win32file.EV_TXEMPTY |
# win32file.EV_RXFLAG | win32file.EV_ERR)
win32file.SetCommMask(self.hComPort,
win32file.EV_RXCHAR | win32file.EV_RXFLAG | win32file.EV_ERR)
#win32file.SetCommMask(self.hComPort, win32file.EV_ERR)
# Setup the connection info.
# Get state and modify it:
comDCB = win32file.GetCommState(self.hComPort)
comDCB.BaudRate = baudrate
if bytesize == FIVEBITS:
comDCB.ByteSize = 5
elif bytesize == SIXBITS:
comDCB.ByteSize = 6
elif bytesize == SEVENBITS:
comDCB.ByteSize = 7
elif bytesize == EIGHTBITS:
comDCB.ByteSize = 8
if parity == PARITY_NONE:
comDCB.Parity = win32file.NOPARITY
comDCB.fParity = 0 # Dis/Enable Parity Check
elif parity == PARITY_EVEN:
comDCB.Parity = win32file.EVENPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
elif parity == PARITY_ODD:
comDCB.Parity = win32file.ODDPARITY
comDCB.fParity = 1 # Dis/Enable Parity Check
if stopbits == STOPBITS_ONE:
comDCB.StopBits = win32file.ONESTOPBIT
elif stopbits == STOPBITS_TWO:
comDCB.StopBits = win32file.TWOSTOPBITS
comDCB.fBinary = 1 # Enable Binary Transmission
# Char. w/ Parity-Err are replaced with 0xff (if fErrorChar is set to TRUE)
if rtscts:
comDCB.fRtsControl = win32file.RTS_CONTROL_HANDSHAKE
comDCB.fDtrControl = win32file.DTR_CONTROL_HANDSHAKE
else:
comDCB.fRtsControl = win32file.RTS_CONTROL_ENABLE
comDCB.fDtrControl = win32file.DTR_CONTROL_ENABLE
comDCB.fOutxCtsFlow = rtscts
comDCB.fOutxDsrFlow = rtscts
comDCB.fOutX = xonxoff
comDCB.fInX = xonxoff
comDCB.fNull = 0
comDCB.fErrorChar = 0
comDCB.fAbortOnError = 0
win32file.SetCommState(self.hComPort, comDCB)
# Clear buffers:
# Remove anything that was there
win32file.PurgeComm(self.hComPort,
win32file.PURGE_TXCLEAR | win32file.PURGE_TXABORT |
win32file.PURGE_RXCLEAR | win32file.PURGE_RXABORT)
#print win32file.ClearCommError(self.hComPort) #flags, comState =
self.overlapped = win32file.OVERLAPPED()
self.overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
