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#!/usr/bin/env python
"""
LUFA Library
Copyright (C) Dean Camera, 2018.
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 the hidapi (https://pypi.python.org/pypi/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_handle():
all_hid_devices = hid.enumerate()
lufa_hid_devices = [d for d in all_hid_devices if d['vendor_id'] == 0x03EB and d['product_id'] == 0x2067]
if len(lufa_hid_devices) is 0:
return None
device_handle = hid.device()
device_handle.open_path(lufa_hid_devices[0]['path'])
return device_handle
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 = bytearray(65)
output_report_data[0] = 0
output_report_data[1] = address & 0xFF
output_report_data[2] = address >> 8
output_report_data[3 : ] = data
hid_device.write(output_report_data)
def program_device(hex_data, device_info):
hid_device = get_hid_device_handle()
if hid_device is None:
print("No valid HID device found.")
sys.exit(1)
try:
print("Connected to bootloader.", flush=True)
# 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]), flush=True)
# 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.", flush=True)
send_page_data(hid_device, 0xFFFF, [0] * device_info['page_size'])
finally:
hid_device.close()
if __name__ == '__main__':
if len(sys.argv) != 3:
print("Usage:")
print("\t{} device file.hex".format(sys.argv[0]))
sys.exit(1)
# 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)
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