sdk/platform-tools/systrace/catapult/telemetry/third_party/pyserial/serial/sermsdos.py

   1 # sermsdos.py
   2 #
   3 # History:
   4 #
   5 #   3rd September 2002                      Dave Haynes
   6 #   1. First defined
   7 #
   8 # Although this code should run under the latest versions of
   9 # Python, on DOS-based platforms such as Windows 95 and 98,
  10 # it has been specifically written to be compatible with
  11 # PyDOS, available at:
  12 # http://www.python.org/ftp/python/wpy/dos.html
  13 #
  14 # PyDOS is a stripped-down version of Python 1.5.2 for
  15 # DOS machines. Therefore, in making changes to this file,
  16 # please respect Python 1.5.2 syntax. In addition, please
  17 # limit the width of this file to 60 characters.
  18 #
  19 # Note also that the modules in PyDOS contain fewer members
  20 # than other versions, so we are restricted to using the
  21 # following:
  22 #
  23 # In module os:
  24 # -------------
  25 # environ, chdir, getcwd, getpid, umask, fdopen, close,
  26 # dup, dup2, fstat, lseek, open, read, write, O_RDONLY,
  27 # O_WRONLY, O_RDWR, O_APPEND, O_CREAT, O_EXCL, O_TRUNC,
  28 # access, F_OK, R_OK, W_OK, X_OK, chmod, listdir, mkdir,
  29 # remove, rename, renames, rmdir, stat, unlink, utime,
  30 # execl, execle, execlp, execlpe, execvp, execvpe, _exit,
  31 # system.
  32 #
  33 # In module os.path:
  34 # ------------------
  35 # curdir, pardir, sep, altsep, pathsep, defpath, linesep.
  36 #
  37
  38 import os
  39 import sys
  40 import string
  41 import serial.serialutil
  42
  43 BAUD_RATES = {
  44                 110: "11",
  45                 150: "15",
  46                 300: "30",
  47                 600: "60",
  48                 1200: "12",
  49                 2400: "24",
  50                 4800: "48",
  51                 9600: "96",
  52                 19200: "19"}
  53
  54 (PARITY_NONE, PARITY_EVEN, PARITY_ODD, PARITY_MARK,
  55 PARITY_SPACE) = (0, 1, 2, 3, 4)
  56 (STOPBITS_ONE, STOPBITS_ONEANDAHALF,
  57 STOPBITS_TWO) = (1, 1.5, 2)
  58 FIVEBITS, SIXBITS, SEVENBITS, EIGHTBITS = (5, 6, 7, 8)
  59 (RETURN_ERROR, RETURN_BUSY, RETURN_RETRY, RETURN_READY,
  60 RETURN_NONE) = ('E', 'B', 'P', 'R', 'N')
  61 portNotOpenError = ValueError('port not open')
  62
  63 def device(portnum):
  64     return 'COM%d' % (portnum+1)
  65
  66 class Serial(serialutil.FileLike):
  67     """
  68        port: number of device; numbering starts at
  69             zero. if everything fails, the user can
  70             specify a device string, note that this
  71             isn't portable any more
  72        baudrate: baud rate
  73        bytesize: number of databits
  74        parity: enable parity checking
  75        stopbits: number of stopbits
  76        timeout: set a timeout (None for waiting forever)
  77        xonxoff: enable software flow control
  78        rtscts: enable RTS/CTS flow control
  79        retry: DOS retry mode
  80     """
  81     def __init__(self,
  82                  port,
  83                  baudrate = 9600,
  84                  bytesize = EIGHTBITS,
  85                  parity = PARITY_NONE,
  86                  stopbits = STOPBITS_ONE,
  87                  timeout = None,
  88                  xonxoff = 0,
  89                  rtscts = 0,
  90                  retry = RETURN_RETRY
  91                  ):
  92
  93         if type(port) == type(''):
  94         # strings are taken directly
  95             self.portstr = port
  96         else:
  97         # numbers are transformed to a string
  98             self.portstr = device(port+1)
  99
 100         self.baud = BAUD_RATES[baudrate]
 101         self.bytesize = str(bytesize)
 102
 103         if parity == PARITY_NONE:
 104             self.parity = 'N'
 105         elif parity == PARITY_EVEN:
 106             self.parity = 'E'
 107         elif parity == PARITY_ODD:
 108             self.parity = 'O'
 109         elif parity == PARITY_MARK:
 110             self.parity = 'M'
 111         elif parity == PARITY_SPACE:
 112             self.parity = 'S'
 113
 114         self.stop = str(stopbits)
 115         self.retry = retry
 116         self.filename = "sermsdos.tmp"
 117
 118         self._config(self.portstr, self.baud, self.parity,
 119         self.bytesize, self.stop, self.retry, self.filename)
 120
 121     def __del__(self):
 122         self.close()
 123
 124     def close(self):
 125         pass
 126
 127     def _config(self, port, baud, parity, data, stop, retry,
 128         filename):
 129         comString = string.join(("MODE ", port, ":"
 130         , " BAUD= ", baud, " PARITY= ", parity
 131         , " DATA= ", data, " STOP= ", stop, " RETRY= ",
 132         retry, " > ", filename ), '')
 133         os.system(comString)
 134
 135     def setBaudrate(self, baudrate):
 136         self._config(self.portstr, BAUD_RATES[baudrate],
 137         self.parity, self.bytesize, self.stop, self.retry,
 138         self.filename)
 139
 140     def inWaiting(self):
 141         """returns the number of bytes waiting to be read"""
 142         raise NotImplementedError
 143
 144     def read(self, num = 1):
 145         """Read num bytes from serial port"""
 146         handle = os.open(self.portstr,
 147         os.O_RDONLY | os.O_BINARY)
 148         rv = os.read(handle, num)
 149         os.close(handle)
 150         return rv
 151
 152     def write(self, s):
 153         """Write string to serial port"""
 154         handle = os.open(self.portstr,
 155         os.O_WRONLY | os.O_BINARY)
 156         rv = os.write(handle, s)
 157         os.close(handle)
 158         return rv
 159
 160     def flushInput(self):
 161         raise NotImplementedError
 162
 163     def flushOutput(self):
 164         raise NotImplementedError
 165
 166     def sendBreak(self):
 167         raise NotImplementedError
 168
 169     def setRTS(self,level=1):
 170         """Set terminal status line"""
 171         raise NotImplementedError
 172
 173     def setDTR(self,level=1):
 174         """Set terminal status line"""
 175         raise NotImplementedError
 176
 177     def getCTS(self):
 178         """Eead terminal status line"""
 179         raise NotImplementedError
 180
 181     def getDSR(self):
 182         """Eead terminal status line"""
 183         raise NotImplementedError
 184
 185     def getRI(self):
 186         """Eead terminal status line"""
 187         raise NotImplementedError
 188
 189     def getCD(self):
 190         """Eead terminal status line"""
 191         raise NotImplementedError
 192
 193     def __repr__(self):
 194         return string.join(( "<Serial>: ", self.portstr
 195         , self.baud, self.parity, self.bytesize, self.stop,
 196         self.retry , self.filename), ' ')
 197
 198 if __name__ == '__main__':
 199     s = Serial(0)
 200     sys.stdio.write('%s %s\n' % (__name__, s))