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+--- Thread: Erreur Code access violation reading 0x00000004 (/thread-28233.html)
Erreur Code access violation reading 0x00000004 - yan_mhb - Jul-10-2020
Hello,
I code on the idle python version 3.8.3 and I receive this error message "OSError: exception: access violation reading 0x00000004"
that does not manage to resolve I went through all the functions in the imported library and I find not "canopenchannel" I think it is hidden and I do not have accessfor information I use windows 7 professional.
from canlib import canlib, Frame
from canlib.canlib import ChannelData
def setUpChannel(channel=0,
openFlags=canlib.canOPEN_ACCEPT_VIRTUAL,
bitrate=canlib.canBITRATE_500K,
bitrateFlags=canlib.canDRIVER_NORMAL):
ch = canlib.openChannel(channel, openFlags)
print("Using channel: %s, EAN: %s" % (ChannelData(channel).device_name,
ChannelData(channel).card_upc_no)
)
ch.setBusOutputControl(bitrateFlags)
ch.setBusParams(bitrate)
ch.busOn()
return ch
def tearDownChannel(ch):
ch.busOff()
ch.close()
print("canlib version:", canlib.dllversion())
ch0 = setUpChannel(channel=0)
ch1 = setUpChannel(channel=1)
frame = Frame(id_=100, data=[1, 2, 3, 4], flags=canlib.canMSG_EXT)
ch1.write(frame)
while True:
try:
frame = ch0.read()
print(frame)
break
except (canlib.canNoMsg) as ex:
pass
except (canlib.canError) as ex:
print(ex)
tearDownChannel(ch0)
tearDownChannel(ch1)error:Traceback (most recent call last):
File "D:\Esss.py", line 25, in <module>
ch0 = setUpChannel(0)
File "D:\Esss.py", line 8, in setUpChannel
ch = canlib.openChannel(0,openFlags)
File "D:\Softs\lib\site-packages\canlib\canlib\channel.py", line 58, in openChannel
ch = Channel(channel, flags)
File "D:\Softs\lib\site-packages\canlib\canlib\channel.py", line 120, in __init__
self.handle = dll.canOpenChannel(channel_number, flags)
OSError: exception: access violation reading 0x00000004
>>>