Updated seika driver supporting older protocol.

Authors: Ulf Beckmann <beckmann@flusoft.de>, James Teh <jamie@jantrid.net>
Fixes #2606.

source/brailleDisplayDrivers/seika.py

@@ -11,7 +11,7 @@
 # This file represents the braille display driver for
 # Seika3 V2.00, Seika80, a product from Nippon Telesoft
 # see www.seika-braille.com for more details
-# 20.06.2012
+# 18.08.2012 13:54
 
 import time
 import wx
@@ -49,19 +49,36 @@ def __init__(self):
 				self._ser = serial.Serial(port, baudrate=BAUDRATE, timeout=TIMEOUT, writeTimeout=TIMEOUT, parity=serial.PARITY_ODD, bytesize=serial.EIGHTBITS, stopbits=serial.STOPBITS_ONE)
 			except serial.SerialException:
 				continue
+			log.debug("serial port open {port}".format(port=port))
 			self._ser.write("\xFF\xFF\x1C")
 			self._ser.flush()
 			# Read out the input buffer
 			time.sleep(0.1)
 			versionS = self._ser.read(13)
+			log.debug("receive {p}".format(p=versionS))
 			if versionS.startswith("seika80"):
 				log.info("Found Seika80 connected via {port} Version {versionS}".format(port=port, versionS=versionS))
 				self.numCells = 80
 				break
-			elif versionS.startswith("seika3"):
+			if versionS.startswith("seika3"):
 				log.info("Found Seika40 connected via {port} Version {versionS}".format(port=port, versionS=versionS))
 				self.numCells = 40
+				self.s40 = "\xFF\xFF\x73\x65\x69\x6B\x61\x00"
 				break
+			# is it a old Seika3?
+			log.debug("test if it is a old Seika3")
+			self._ser.write("\xFF\xFF\x0A")
+			self._ser.flush()
+			# Read out the input buffer
+			time.sleep(0.1)
+			versionS = self._ser.read(12)
+			log.debug("receive {p}".format(p=versionS))
+			if versionS.startswith("\x00\x05\x28\x08\x76\x35\x2E\x30\x01\x01\x01\x01") or versionS.startswith("\x00\x05\x28\x08\x73\x65\x69\x6b\x61\x00"):
+				log.info("Found Seika3 old Version connected via {port} Version {versionS}".format(port=port, versionS=versionS))
+				self.numCells = 40
+				self.s40 = "\xFF\xFF\x04\x00\x63\x00\x50\x00"
+				break
+			self._ser.close()
 		else:
 			raise RuntimeError("No SEIKA40/80 display found")
 		self._readTimer = wx.PyTimer(self.handleResponses)
@@ -80,7 +97,7 @@ def display(self, cells):
 		if self.numCells==80:
 			line = "\xff\xff\x73\x38\x30\x00\x00\x00"+"".join(chr(cell) for cell in cells)
 		else:
-			line = "\xff\xff\x73\x65\x69\x6b\x61\x00"+"".join("\0"+chr(cell) for cell in cells)
+			line = self.s40+"".join("\0"+chr(cell) for cell in cells)
 		self._ser.write(line)
 
 	def handleResponses(self):
@@ -93,7 +110,7 @@ def handleResponses(self):
 		chars[0] = ord(self._ser.read())
 		chars[1] = ord(self._ser.read())
 		keytyp=1
-		if not chars[0] & 0xe0: # a cursorrouting block is expected
+		if not chars[0] & 0x60: # a cursorrouting block is expected
 			char = self._ser.read(max)
 			chars = [ord(c) for c in char]
 			keytyp=2