From 84ebaf55250667fc86cd96b1c5311d29d56c7ba2 Mon Sep 17 00:00:00 2001
From: Ewald Weinhandl <ewald.weinhandl@gmail.com>
Date: Fri, 9 Nov 2018 21:13:13 +0100
Subject: Add enable/disable hardware flow control (RTS/CTS) and (DSR/DTR) in
 config file.

---
 pyprofibus/conf.py       | 6 +++++-
 pyprofibus/phy_serial.py | 8 +++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/pyprofibus/conf.py b/pyprofibus/conf.py
index fc93c89..66e7c33 100644
--- a/pyprofibus/conf.py
+++ b/pyprofibus/conf.py
@@ -111,6 +111,10 @@ class PbConf(object):
 					  fallback = "/dev/ttyS0")
 			self.phyBaud = getint("PHY", "baud",
 					      fallback = 9600)
+			self.phyRtsCts = getboolean("PHY", "rtscts",
+					      fallback = False)
+			self.phyDsrDtr = getboolean("PHY", "dsrdtr",
+					      fallback = False)
 
 			# [DP]
 			self.dpMasterClass = getint("DP", "master_class",
@@ -180,5 +184,5 @@ class PbConf(object):
 		else:
 			raise PbConfError("Invalid phyType parameter value: "
 					  "%s" % self.phyType)
-		phy.setConfig(baudrate = self.phyBaud)
+		phy.setConfig(baudrate = self.phyBaud, rtscts = self.phyRtsCts, dsrdtr = self.phyDsrDtr)
 		return phy
diff --git a/pyprofibus/phy_serial.py b/pyprofibus/phy_serial.py
index c353307..46f8d37 100644
--- a/pyprofibus/phy_serial.py
+++ b/pyprofibus/phy_serial.py
@@ -64,7 +64,7 @@ class CpPhySerial(CpPhy):
 			self.__serial.timeout = 0
 			self.__serial.xonxoff = False
 			self.__serial.rtscts = False
-			self.__serial.dsrdtr = True
+			self.__serial.dsrdtr = False
 			if useRS485Class:
 				self.__serial.rs485_mode = serial.rs485.RS485Settings(
 					rts_level_for_tx = True,
@@ -165,7 +165,7 @@ class CpPhySerial(CpPhy):
 			raise PhyError("PHY-serial: Failed to transmit "
 				"telegram:\n" + str(e))
 
-	def setConfig(self, baudrate = CpPhy.BAUD_9600):
+	def setConfig(self, baudrate = CpPhy.BAUD_9600, rtscts = False, dsrdtr = False):
 		wellSuppBaud = (9600, 19200)
 		if baudrate not in wellSuppBaud:
 			# The hw/driver might silently ignore the baudrate
@@ -179,9 +179,11 @@ class CpPhySerial(CpPhy):
 			      baudrate,
 			      ", ".join(str(b) for b in wellSuppBaud)))
 		try:
-			if baudrate != self.__serial.baudrate:
+			if baudrate != self.__serial.baudrate or rtscts != self.__serial.rtscts or dsrdtr != self.__serial.dsrdtr:
 				self.__serial.close()
 				self.__serial.baudrate = baudrate
+				self.__serial.rtscts = rtscts
+				self.__serial.dsrdtr = dsrdtr
 				self.__serial.open()
 				self.__rxBuf = bytearray()
 		except (serial.SerialException, ValueError) as e:
-- 
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