/
hid_bootloader_loader.py
118 lines (91 loc) · 4 KB
/
hid_bootloader_loader.py
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
"""
LUFA Library
Copyright (C) Dean Camera, 2016.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
"""
"""
Front-end programmer for the LUFA HID class bootloader.
Usage:
python hid_bootloader_loader.py <Device> <Input>.hex
Example:
python hid_bootloader_loader.py at90usb1287 Mouse.hex
Requires cython-hidapi (https://github.com/trezor/cython-hidapi) and
IntelHex (https://pypi.python.org/pypi/IntelHex/) libraries.
"""
import sys
import hid
from intelhex import IntelHex
# Device information table
device_info_map = dict()
device_info_map['at90usb1287'] = {'page_size': 256, 'flash_kb': 128}
device_info_map['at90usb1286'] = {'page_size': 256, 'flash_kb': 128}
device_info_map['at90usb647'] = {'page_size': 256, 'flash_kb': 64}
device_info_map['at90usb646'] = {'page_size': 256, 'flash_kb': 64}
device_info_map['atmega32u4'] = {'page_size': 128, 'flash_kb': 32}
device_info_map['atmega32u2'] = {'page_size': 128, 'flash_kb': 32}
device_info_map['atmega16u4'] = {'page_size': 128, 'flash_kb': 16}
device_info_map['atmega16u2'] = {'page_size': 128, 'flash_kb': 16}
device_info_map['at90usb162'] = {'page_size': 128, 'flash_kb': 16}
device_info_map['atmega8u2'] = {'page_size': 128, 'flash_kb': 8}
device_info_map['at90usb82'] = {'page_size': 128, 'flash_kb': 8}
def get_hid_device():
valid_hid_devices = hid.enumerate(vendor_id=0x03EB,
product_id=0x2067)
if len(valid_hid_devices) is 0:
return None
else:
hid_device = hid.device()
hid_device.open_path(valid_hid_devices[0]['path'])
return hid_device
def send_page_data(hid_device, address, data):
# Bootloader page data should be the HID Report ID (always zero) followed
# by the starting address to program, then one device's flash page worth
# of data
output_report_data = [0]
output_report_data.extend([address & 0xFF, address >> 8])
output_report_data.extend(data)
hid_device.write(output_report_data)
def program_device(hex_data, device_info):
hid_device = get_hid_device()
if hid_device is None:
print("No valid HID device found.")
sys.exit(1)
try:
print("Connected to bootloader.")
# Program in all data from the loaded HEX file, in a number of device
# page sized chunks
for addr in range(0, hex_data.maxaddr(), device_info['page_size']):
# Compute the address range of the current page in the device
current_page_range = range(addr, addr+device_info['page_size'])
# Extract the data from the hex file at the specified start page
# address and convert it to a regular list of bytes
page_data = [hex_data[i] for i in current_page_range]
print("Writing address 0x%04X-0x%04X" % (current_page_range[0], current_page_range[-1]))
# Devices with more than 64KB of flash should shift down the page
# address so that it is 16-bit (page size is guaranteed to be
# >= 256 bytes so no non-zero address bits are discarded)
if device_info['flash_kb'] < 64:
send_page_data(hid_device, addr, page_data)
else:
send_page_data(hid_device, addr >> 8, page_data)
# Once programming is complete, start the application via a dummy page
# program to the page address 0xFFFF
print("Programming complete, starting application.")
send_page_data(hid_device, 0xFFFF, [0] * device_info['page_size'])
finally:
hid_device.close()
if __name__ == '__main__':
# Load the specified HEX file
try:
hex_data = IntelHex(sys.argv[2])
except:
print("Could not open the specified HEX file.")
sys.exit(1)
# Retrieve the device information entry for the specified device
try:
device_info = device_info_map[sys.argv[1]]
except:
print("Unknown device name specified.")
sys.exit(1)
program_device(hex_data, device_info)