From 16da64c72ab6f9aaa7f1bf27e9bdbd3bfa56d10d Mon Sep 17 00:00:00 2001
From: Bernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Date: Mon, 25 Oct 2004 11:21:14 +0000
Subject: [PATCH] Hack to utilise the serial port. Needs cleaning up.

---
 sql-edition/servers/SerialClient.py | 51 +++++++++++++++++++++++++++++
 sql-edition/servers/VendServer.py   | 11 +++++--
 2 files changed, 59 insertions(+), 3 deletions(-)
 create mode 100644 sql-edition/servers/SerialClient.py

diff --git a/sql-edition/servers/SerialClient.py b/sql-edition/servers/SerialClient.py
new file mode 100644
index 0000000..d17b764
--- /dev/null
+++ b/sql-edition/servers/SerialClient.py
@@ -0,0 +1,51 @@
+import os, termios
+from time import sleep
+import logging
+
+class SerialClientException(Exception): pass
+
+class SerialClient:
+	BaudRates = {
+		110: termios.B110,
+		300: termios.B300,
+		600: termios.B600,
+		1200: termios.B1200,
+		2400: termios.B2400,
+		4800: termios.B4800,
+		9600: termios.B9600,
+		19200: termios.B19200,
+		38400: termios.B38400,
+		57600: termios.B57600,
+		115200: termios.B115200,
+	}
+
+	def __init__(self, port = '/dev/ttyS0', baud = 9600):
+		self.port = port
+		self.baud = baud
+		try:
+			self.handle = os.open(port, os.O_RDWR)
+		except:
+			raise SerialClientException('Unable to open port')
+		self.oldmode = termios.tcgetattr(self.handle)
+		cc = [0]*len(self.oldmode[6])
+		cc[termios.VMIN] = 1
+		cc[termios.VTIME] = 0
+		termios.tcsetattr(self.handle, termios.TCSANOW,
+			[
+			termios.IGNPAR, # c_iflag
+			0, # c_oflag
+			termios.CS8|termios.CLOCAL|termios.CREAD, # c_cflag
+			0, # c_lflag
+			self.BaudRates[self.baud], # c_ispeed
+			self.BaudRates[self.baud], # c_ospeed
+			cc])
+		self.rfh = os.fdopen(self.handle, 'r')
+		self.wfh = os.fdopen(self.handle, 'w')
+		self.wfh.write('B\n')
+
+	def get_fh(self):
+		return (self.rfh, self.wfh)
+
+	def __del__(self):
+	    pass
+
diff --git a/sql-edition/servers/VendServer.py b/sql-edition/servers/VendServer.py
index e17de1c..8c5ab73 100755
--- a/sql-edition/servers/VendServer.py
+++ b/sql-edition/servers/VendServer.py
@@ -10,7 +10,8 @@ from traceback import format_tb
 if USE_DB: import pg
 from time import time, sleep
 from popen2 import popen2
-from LATClient import LATClient, LATClientException
+#from LATClient import LATClient, LATClientException
+from SerialClient import SerialClient, SerialClientException
 from VendingMachine import VendingMachine, VendingException
 from MessageKeeper import MessageKeeper
 from HorizScroll import HorizScroll
@@ -416,7 +417,11 @@ def run_forever(rfh, wfh, options, cf):
 					time_to_autologout = time() + 8
 
 def connect_to_vend(options, cf):
-	# Open vending machine via LAT?
+	# Open vending machine via serial.
+	logging.info('Connecting to vending machine using serial')
+	serialclient = SerialClient(port = '/dev/ttyS1', baud = 9600)
+	return serialclient.get_fh()
+	
 	if options.use_lat:
 		logging.info('Connecting to vending machine using LAT')
 		latclient = LATClient(service = cf.ServiceName, password = cf.ServicePassword, server_name = cf.ServerName, connect_password = cf.ConnectPassword, priv_password = cf.PrivPassword)
@@ -557,7 +562,7 @@ def do_vend_server(options, config_opts):
 	while True:
 		try:
 			rfh, wfh = connect_to_vend(options, config_opts)
-		except (LATClientException, socket.error), e:
+		except (SerialClientException, socket.error), e:
 			(exc_type, exc_value, exc_traceback) = sys.exc_info()
 			del exc_traceback
 			logging.error("Connection error: "+str(exc_type)+" "+str(e))
-- 
2.20.1