1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
#!/usr/bin/env python
"""
LUFA Library
Copyright (C) Dean Camera, 2019.
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 PyUSB >= 1.0.0 (https://github.com/pyusb/pyusb).
"""
import sys
from time import sleep
import usb.core
import usb.util
def get_and_init_hid_device():
device = usb.core.find(idVendor=0x03EB, idProduct=0x204F)
if device is None:
sys.exit("Could not find USB device.")
if device.is_kernel_driver_active(0):
try:
device.detach_kernel_driver(0)
except usb.core.USBError as exception:
sys.exit("Could not detatch kernel driver: %s" % str(exception))
try:
device.set_configuration()
except usb.core.USBError as exception:
sys.exit("Could not set configuration: %s" % str(exception))
return device
def send_led_pattern(device, led1, led2, led3, led4):
# Report data for the demo is LED on/off data
report_data = [led1, led2, led3, led4]
# Send the generated report to the device
number_of_bytes_written = device.ctrl_transfer( # Set Report control request
0b00100001, # bmRequestType (constant for this control request)
0x09, # bmRequest (constant for this control request)
0, # wValue (MSB is report type, LSB is report number)
0, # wIndex (interface number)
report_data # report data to be sent
);
assert number_of_bytes_written == len(report_data)
print("Sent LED Pattern: {0}".format(report_data))
def receive_led_pattern(hid_device):
endpoint = hid_device[0][(0,0)][0]
report_data = hid_device.read(endpoint.bEndpointAddress, endpoint.wMaxPacketSize)
return list(report_data)
def main():
hid_device = get_and_init_hid_device()
print("Connected to device 0x%04X/0x%04X - %s [%s]" %
(hid_device.idVendor, hid_device.idProduct,
usb.util.get_string(hid_device, hid_device.iProduct),
usb.util.get_string(hid_device, hid_device.iManufacturer)))
p = 0
while (True):
# 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)
# Receive and print the current LED pattern
led_pattern = receive_led_pattern(hid_device)[0:4]
print("Received LED Pattern: {0}".format(led_pattern))
# Compute next LED pattern in sequence
p = (p + 1) % 16
# Delay a bit for visual effect
sleep(.2)
if __name__ == '__main__':
main()
|
