Changeset 3537 for pykocard/trunk

Timestamp:

04/21/10 02:17:15 (15 years ago)

Author:

jerome

Message:

Now opens the serial device and can write to it.

Files:

• pykocard/trunk/pykocard/cartadistcrs.py (modified) (5 diffs)

pykocard/trunk/pykocard/cartadistcrs.py

@@ -24 +24 @@
 import sys
 
+import serial # On Debian/Ubuntu : apt-get install python-serial
+
 class CartadisTCRS :
     """A class to manage Cartadis TCRS vending card readers.
@@ -31 +33 @@
        Cartadis is a registered trademark from Copie Monnaie France (C.M.F.)
     """
-    def __init__(self, device, timeout, debug) :
+    def __init__(self, device, timeout=5.0, debug=False) :
         """Initializes the connection to the reader."""
         self.device = device
         self.timeout = timeout
         self.debug = debug
-        self.serialport = None
 
+        self.lastcommand = None
         self.tcrsprompt = chr(13) + chr(10) + '$' # the prompt
         self.eoc = chr(13) # end of command
@@ -57 +59 @@
         self.trnum = None
 
+        # opens the connection to the reader
+        self.tcrs = serial.Serial(device,
+                                  baudrate=9600,
+                                  bytesize=serial.EIGHTBITS,
+                                  parity=serial.PARITY_NONE,
+                                  stopbits=serial.STOPBITS_ONE,
+                                  xonxoff=False,
+                                  rtscts=True,
+                                  timeout=timeout)
+
+        # cleans up any data waiting to be read
+        self.tcrs.flushInput()
+
     def __del__(self) :
         """Ensures the serial link is closed on deletion."""
@@ -63 +78 @@
     def close(self) :
         """Closes the serial link if it is open."""
-        if self.serialport is not None :
-            self.serialport.close()
-            self.serialport = None
+        if self.tcrs is not None :
+            self.tcrs.close()
+            self.tcrs = None
 
     def logDebug(self, message) :
@@ -73 +88 @@
             sys.stderr.flush()
 
+    def sendCommand(self, cmd, param=None) :
+        """Sends a command to the reader."""
+        if param is not None :
+            command = "%s %s%s" % (cmd, param, self.eoc)
+        else :
+            command = "%s%s" % (cmd, self.eoc)
+        self.logDebug("Sending %s to reader" % repr(command))
+        self.tcrs.write(command)
+        self.tcrs.flush()
+        self.lastcommand = command
 
+