Bootloaders/HID/HostLoaderApp_Python/hid_bootloader_loader.py

   1 #!/usr/bin/env python
   2
   3 """
   4              LUFA Library
   5      Copyright (C) Dean Camera, 2020.
   6
   7   dean [at] fourwalledcubicle [dot] com
   8            www.lufa-lib.org
   9 """
  10
  11 """
  12     Front-end programmer for the LUFA HID class bootloader.
  13
  14     Usage:
  15         python hid_bootloader_loader.py <Device> <Input>.hex
  16
  17     Example:
  18         python hid_bootloader_loader.py at90usb1287 Mouse.hex
  19
  20     Requires the hidapi (https://pypi.python.org/pypi/hidapi) and
  21     IntelHex (https://pypi.python.org/pypi/IntelHex) libraries.
  22 """
  23
  24 import sys
  25 import hid
  26 from intelhex import IntelHex
  27
  28
  29 # Device information table
  30 device_info_map = dict()
  31 device_info_map['at90usb1287'] = {'page_size': 256, 'flash_kb': 128}
  32 device_info_map['at90usb1286'] = {'page_size': 256, 'flash_kb': 128}
  33 device_info_map['at90usb647']  = {'page_size': 256, 'flash_kb': 64}
  34 device_info_map['at90usb646']  = {'page_size': 256, 'flash_kb': 64}
  35 device_info_map['atmega32u4']  = {'page_size': 128, 'flash_kb': 32}
  36 device_info_map['atmega32u2']  = {'page_size': 128, 'flash_kb': 32}
  37 device_info_map['atmega16u4']  = {'page_size': 128, 'flash_kb': 16}
  38 device_info_map['atmega16u2']  = {'page_size': 128, 'flash_kb': 16}
  39 device_info_map['at90usb162']  = {'page_size': 128, 'flash_kb': 16}
  40 device_info_map['atmega8u2']   = {'page_size': 128, 'flash_kb': 8}
  41 device_info_map['at90usb82']   = {'page_size': 128, 'flash_kb': 8}
  42
  43
  44 def get_hid_device_handle():
  45     all_hid_devices = hid.enumerate()
  46
  47     lufa_hid_devices = [d for d in all_hid_devices if d['vendor_id'] == 0x03EB and d['product_id'] == 0x2067]
  48
  49     if len(lufa_hid_devices) is 0:
  50         return None
  51
  52     device_handle = hid.device()
  53     device_handle.open_path(lufa_hid_devices[0]['path'])
  54     return device_handle
  55
  56
  57 def send_page_data(hid_device, address, data):
  58     # Bootloader page data should be the HID Report ID (always zero) followed
  59     # by the starting address to program, then one device's flash page worth
  60     # of data
  61     output_report_data = bytearray(65)
  62     output_report_data[0] = 0
  63     output_report_data[1] = address & 0xFF
  64     output_report_data[2] = address >> 8
  65     output_report_data[3 : ] = data
  66
  67     hid_device.write(output_report_data)
  68
  69
  70 def program_device(hex_data, device_info):
  71     hid_device = get_hid_device_handle()
  72
  73     if hid_device is None:
  74         print("No valid HID device found.")
  75         sys.exit(1)
  76
  77     try:
  78         print("Connected to bootloader.", flush=True)
  79
  80         # Program in all data from the loaded HEX file, in a number of device
  81         # page sized chunks
  82         for addr in range(0, hex_data.maxaddr(), device_info['page_size']):
  83             # Compute the address range of the current page in the device
  84             current_page_range = range(addr, addr+device_info['page_size'])
  85
  86             # Extract the data from the hex file at the specified start page
  87             # address and convert it to a regular list of bytes
  88             page_data = [hex_data[i] for i in current_page_range]
  89
  90             print("Writing address 0x%04X-0x%04X" % (current_page_range[0], current_page_range[-1]), flush=True)
  91
  92             # Devices with more than 64KB of flash should shift down the page
  93             # address so that it is 16-bit (page size is guaranteed to be
  94             # >= 256 bytes so no non-zero address bits are discarded)
  95             if device_info['flash_kb'] < 64:
  96                 send_page_data(hid_device, addr, page_data)
  97             else:
  98                 send_page_data(hid_device, addr >> 8, page_data)
  99
 100         # Once programming is complete, start the application via a dummy page
 101         # program to the page address 0xFFFF
 102         print("Programming complete, starting application.", flush=True)
 103         send_page_data(hid_device, 0xFFFF, [0] * device_info['page_size'])
 104
 105     finally:
 106         hid_device.close()
 107
 108
 109 if __name__ == '__main__':
 110     if len(sys.argv) != 3:
 111         print("Usage:")
 112         print("\t{} device file.hex".format(sys.argv[0]))
 113         sys.exit(1)
 114
 115     # Load the specified HEX file
 116     try:
 117         hex_data = IntelHex(sys.argv[2])
 118     except:
 119         print("Could not open the specified HEX file.")
 120         sys.exit(1)
 121
 122     # Retrieve the device information entry for the specified device
 123     try:
 124         device_info = device_info_map[sys.argv[1]]
 125     except:
 126         print("Unknown device name specified.")
 127         sys.exit(1)
 128
 129     program_device(hex_data, device_info)