import usb.core
import time

hid_usb_dev = None


def usb_find():
    global hid_usb_dev
    hid_usb_dev = usb.core.find(idVendor=1155, idProduct=22352)
    print(hid_usb_dev)
    if hid_usb_dev is None:
        raise ValueError("Device not found")
    

def main():

    global hid_usb_dev
    is_device = False

    while True:
        if is_device:
            print("Try to read from device...")
            try: 
                ret = hid_usb_dev.read(0x81, 64, 100)
                print(*ret)
            except:
                is_device = False
                print("Reading error")                

        if not is_device:
            print("Try to find stm32 HID")
            try:
                usb_find()
            except:
                print("Can't find from usb_hid")
                is_device = False
            else:
                print("Device found")
                is_device = True


        time.sleep(1)




if __name__ == '__main__':
    main()