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- """
- LUFA Library
- Copyright (C) Dean Camera, 2014.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
- """
-
- """
- LUFA Generic HID device demo host test script. This script will send a
- continuous stream of generic reports to the device, to show a variable LED
- pattern on the target board. Send and received report data is printed to
- the terminal.
-
- Requires the pywinusb library (https://pypi.python.org/pypi/pywinusb/).
- """
-
- import sys
- from time import sleep
- import pywinusb.hid as hid
-
- # Generic HID device VID, PID and report payload length (length is increased
- # by one to account for the Report ID byte that must be pre-pended)
- device_vid = 0x03EB
- device_pid = 0x204F
- report_length = 1 + 8
-
-
- def get_hid_device_handle():
- hid_device_filter = hid.HidDeviceFilter(vendor_id=device_vid,
- product_id=device_pid)
-
- valid_hid_devices = hid_device_filter.get_devices()
-
- if len(valid_hid_devices) is 0:
- return None
- else:
- return valid_hid_devices[0]
-
-
- def send_led_pattern(device, led1, led2, led3, led4):
- # Report data for the demo is the report ID (always zero) followed by the
- # LED on/off data
- report_data = [0, led1, led2, led3, led4]
-
- # Zero-extend the array to the length the report should be
- report_data.extend([0] * (report_length - len(report_data)))
-
- # Send the generated report to the device
- device.send_output_report(report_data)
-
- print("Sent LED Pattern: {0}".format(report_data[1:5]))
-
-
- def received_led_pattern(report_data):
- print("Received LED Pattern: {0}".format(report_data[1:5]))
-
-
- def main():
- hid_device = get_hid_device_handle()
-
- if hid_device is None:
- print("No valid HID device found.")
- sys.exit(1)
-
- try:
- hid_device.open()
-
- print("Connected to device 0x%04X/0x%04X - %s [%s]" %
- (hid_device.vendor_id, hid_device.product_id,
- hid_device.product_name, hid_device.vendor_name))
-
- # Set up the HID input report handler to receive reports
- hid_device.set_raw_data_handler(received_led_pattern)
-
- p = 0
- while (hid_device.is_plugged()):
- # Convert the current pattern index to a bit-mask and send
- send_led_pattern(hid_device,
- (p >> 3) & 1,
- (p >> 2) & 1,
- (p >> 1) & 1,
- (p >> 0) & 1)
-
- # Compute next LED pattern in sequence
- p = (p + 1) % 16
-
- # Delay a bit for visual effect
- sleep(.2)
-
- finally:
- hid_device.close()
-
-
- if __name__ == '__main__':
- main()
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