X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=sql-edition%2Fservers%2FSerialClient.py;fp=sql-edition%2Fservers%2FSerialClient.py;h=d17b764b002a4a5f67f3fe98fd14a49f55c97994;hb=16da64c72ab6f9aaa7f1bf27e9bdbd3bfa56d10d;hp=0000000000000000000000000000000000000000;hpb=60c8749199aed1381c4146a548250383ff9e7d4a;p=zanchey%2Fdispense2.git

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
+