cleanup

usbcardreader.py

@@ -0,0 +1,52 @@
+import usb.core
+import usb.util
+import threading
+import time
+
+
+USB_IF      = 0 # Interface
+USB_TIMEOUT = 5 # Timeout in ms
+USB_VENDOR  = 0xffff # Vendor-ID:
+USB_PRODUCT = 0x0035 # Product-ID
+
+
+class UsbCardReader:
+    def __init__(self, callback):
+        #fn called on found card
+        self.callback = callback
+        # Find the HID device by vendor/product ID
+        self.dev = usb.core.find(idVendor=USB_VENDOR, idProduct=USB_PRODUCT)
+        # Get and store the endpoint
+        self.endpoint = self.dev[0][(0,0)][0]
+        if self.dev.is_kernel_driver_active(USB_IF) is True:
+            self.dev.detach_kernel_driver(USB_IF)
+        # Claim the device
+        usb.util.claim_interface(self.dev, USB_IF)
+        self.receivedNumber = 0
+
+        cardread=threading.Thread(target=self.read)
+        cardread.start()
+
+    def read(self):
+        receivedNumber = 0
+
+        while True:
+            control = None
+            try:
+                control = self.dev.read(self.endpoint.bEndpointAddress, self.endpoint.wMaxPacketSize, USB_TIMEOUT)
+                if (control[2] != 40) and (control[2] != 0):
+                    receivedDigit = control[2] - 29
+                    if receivedDigit == 10:
+                        receivedDigit = 0
+                    receivedNumber = 10 * receivedNumber + receivedDigit
+
+                if ( control[0] == 0 ) and ( control[2] == 40 ) and ( not receivedNumber == 0 ):
+                    self.callback(receivedNumber)
+                    receivedNumber = 0
+            except KeyboardInterrupt:
+                exit()
+            except:
+                receivedNumber = 0
+                pass
+
+            time.sleep(0.001)