53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
import usb.core
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import usb.util
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import threading
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import time
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USB_IF = 0 # Interface
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USB_TIMEOUT = 5 # Timeout in ms
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USB_VENDOR = 0xffff # Vendor-ID:
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USB_PRODUCT = 0x0035 # Product-ID
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class UsbCardReader:
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def __init__(self, callback):
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#fn called on found card
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self.callback = callback
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# Find the HID device by vendor/product ID
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self.dev = usb.core.find(idVendor=USB_VENDOR, idProduct=USB_PRODUCT)
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# Get and store the endpoint
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self.endpoint = self.dev[0][(0,0)][0]
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if self.dev.is_kernel_driver_active(USB_IF) is True:
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self.dev.detach_kernel_driver(USB_IF)
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# Claim the device
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usb.util.claim_interface(self.dev, USB_IF)
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self.receivedNumber = 0
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cardread=threading.Thread(target=self.read)
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cardread.start()
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def read(self):
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receivedNumber = 0
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while True:
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control = None
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try:
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control = self.dev.read(self.endpoint.bEndpointAddress, self.endpoint.wMaxPacketSize, USB_TIMEOUT)
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if (control[2] != 40) and (control[2] != 0):
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receivedDigit = control[2] - 29
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if receivedDigit == 10:
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receivedDigit = 0
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receivedNumber = 10 * receivedNumber + receivedDigit
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if ( control[0] == 0 ) and ( control[2] == 40 ) and ( not receivedNumber == 0 ):
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self.callback(receivedNumber)
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receivedNumber = 0
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except KeyboardInterrupt:
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exit()
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except:
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receivedNumber = 0
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pass
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time.sleep(0.001)
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