Christopher Moore wrote: > I was wondering if there was a way to recover (aka regain communication > with the device) from a "Timer expired" message. The only way I've > found so far is to physically re-plugin the device. I have a different approach to you, I have a class PlugUSBDevice which initialises the device. Here is a cut down version of how it is initalised:
class PlugUSBDevice(object) :
PLUG_VENDOR_ID = 0x08D3
PLUG_PRODUCT_ID = 0x0001
PLUG_INTERFACE_ID = 0
PLUG_BULK_IN_EP = 0x2
PLUG_BULK_OUT_EP = 0x81
MAX_PACKET_SIZE = 8
def __init__(self) :
self.device_descriptor = DeviceDescriptor(PlugUSBDevice.PLUG_VENDOR_ID,
PlugUSBDevice.PLUG_PRODUCT_ID,
PlugUSBDevice.PLUG_INTERFACE_ID)
self.handle = None
self.devicestate = PlugUSBDevice.MIMIO_MODESTATE_INVALID
self.greeted = 0
self.currentMaxPacketSize = 8
def open(self) :
self.device = self.device_descriptor.getDevice()
self.handle = self.device.open()
self.handle.reset()
if sys.platform == 'darwin' :
# XXX : For some reason, Mac OS X doesn't set the
# configuration automatically like Linux does.
self.handle.setConfiguration(1)
self.handle.claimInterface(self.device_descriptor.interface_id)
#self.handle.setAltInterface(self.device_descriptor.interface_id)
#print "handle", self.handle
#print dir(self.handle)
print "Claimed interface"
I then in my other routine call:
self.plug = PlugUSBDevice()
self.plug.open()
if something goes wrong I can just call open again and it resets the device.
Regards
Phil Hannent
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