121 lines
4 KiB
Python
121 lines
4 KiB
Python
"""
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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"""
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"""
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Front-end programmer for the LUFA HID class bootloader.
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Usage:
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python hid_bootloader_loader.py <Device> <Input>.hex
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Example:
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python hid_bootloader_loader.py at90usb1287 Mouse.hex
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Requires the pywinusb (https://pypi.python.org/pypi/pywinusb/) and
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IntelHex (https://pypi.python.org/pypi/IntelHex/) libraries.
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"""
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import sys
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from pywinusb import hid
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from intelhex import IntelHex
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# Device information table
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device_info_map = dict()
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device_info_map['at90usb1287'] = {'page_size': 256, 'flash_kb': 128}
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device_info_map['at90usb1286'] = {'page_size': 256, 'flash_kb': 128}
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device_info_map['at90usb647'] = {'page_size': 256, 'flash_kb': 64}
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device_info_map['at90usb646'] = {'page_size': 256, 'flash_kb': 64}
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device_info_map['atmega32u4'] = {'page_size': 128, 'flash_kb': 32}
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device_info_map['atmega32u2'] = {'page_size': 128, 'flash_kb': 32}
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device_info_map['atmega16u4'] = {'page_size': 128, 'flash_kb': 16}
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device_info_map['atmega16u2'] = {'page_size': 128, 'flash_kb': 16}
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device_info_map['at90usb162'] = {'page_size': 128, 'flash_kb': 16}
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device_info_map['atmega8u2'] = {'page_size': 128, 'flash_kb': 8}
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device_info_map['at90usb82'] = {'page_size': 128, 'flash_kb': 8}
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def get_hid_device_handle():
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hid_device_filter = hid.HidDeviceFilter(vendor_id=0x03EB,
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product_id=0x2067)
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valid_hid_devices = hid_device_filter.get_devices()
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if len(valid_hid_devices) is 0:
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return None
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else:
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return valid_hid_devices[0]
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def send_page_data(hid_device, address, data):
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# Bootloader page data should be the HID Report ID (always zero) followed
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# by the starting address to program, then one device's flash page worth
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# of data
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output_report_data = [0]
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output_report_data.extend([address & 0xFF, address >> 8])
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output_report_data.extend(data)
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hid_device.send_output_report(output_report_data)
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def program_device(hex_data, device_info):
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hid_device = get_hid_device_handle()
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if hid_device is None:
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print("No valid HID device found.")
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sys.exit(1)
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try:
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hid_device.open()
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print("Connected to bootloader.")
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# Program in all data from the loaded HEX file, in a number of device
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# page sized chunks
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for addr in range(0, hex_data.maxaddr(), device_info['page_size']):
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# Compute the address range of the current page in the device
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current_page_range = range(addr, addr+device_info['page_size'])
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# Extract the data from the hex file at the specified start page
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# address and convert it to a regular list of bytes
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page_data = [hex_data[i] for i in current_page_range]
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print("Writing address 0x%04X-0x%04X" % (current_page_range[0], current_page_range[-1]))
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# Devices with more than 64KB of flash should shift down the page
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# address so that it is 16-bit (page size is guaranteed to be
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# >= 256 bytes so no non-zero address bits are discarded)
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if device_info['flash_kb'] < 64:
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send_page_data(hid_device, addr, page_data)
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else:
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send_page_data(hid_device, addr >> 8, page_data)
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# Once programming is complete, start the application via a dummy page
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# program to the page address 0xFFFF
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print("Programming complete, starting application.")
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send_page_data(hid_device, 0xFFFF, [0] * device_info['page_size'])
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finally:
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hid_device.close()
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if __name__ == '__main__':
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# Load the specified HEX file
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try:
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hex_data = IntelHex(sys.argv[2])
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except:
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print("Could not open the specified HEX file.")
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sys.exit(1)
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# Retrieve the device information entry for the specified device
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try:
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device_info = device_info_map[sys.argv[1]]
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except:
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print("Unknown device name specified.")
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sys.exit(1)
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program_device(hex_data, device_info)
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