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add option block on receiveMessage

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added the option block to the receiveMessage Method
*default False for no compatibility issues
This commit is contained in:
Philipp Rauch 2013-11-19 15:05:58 +01:00
parent ec5cd45b4d
commit d960680e2e
1 changed files with 5 additions and 3 deletions
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8
CANLibrary/PCan.py
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@ -8,9 +8,10 @@ Created on 06.07.2012
import PCANBasic # PCANBasic wrapper library provided by PEAK
import sys
from time import sleep
class PcanAdapter (object):
class PcanAdapter(object):
'''
A class for controlling a PEAK PCan adapter. Based on the PCANBasic library.
'''
@ -111,7 +112,7 @@ class PcanAdapter (object):
self.Pcan.Write(self.Channel, msg) # write it onto the Bus
#print ('Message ' + Message.Label + ' written.')
def receiveMessage(self):
def receiveMessage(self, block = False):
'''
Tries to receive a CAN message and puts its data into the according CanMessage object's Data field.
This method should be called frequently.
@ -135,5 +136,6 @@ class PcanAdapter (object):
self.Messages[msgKey].decomposeData()
self.Messages[msgKey].timestamp = timestamp.micros + 1000 * timestamp.millis + 0xFFFFFFFF * 1000 * timestamp.millis_overflow
return msg.ID
elif result == PCANBasic.PCAN_ERROR_QRCVEMPTY:
elif result == PCANBasic.PCAN_ERROR_QRCVEMPTY and block == False:
return None
sleep(0.01)