X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/6e79c3ecaf0079a7653db5cce3dff5a3bf983f62..ba6d9c1a971db3c42bf0b054ebb64f72b3e3ddba:/Bootloaders/HID/HostLoaderApp_Python/hid_bootloader_loader.py?ds=sidebyside

diff --git a/Bootloaders/HID/HostLoaderApp_Python/hid_bootloader_loader.py b/Bootloaders/HID/HostLoaderApp_Python/hid_bootloader_loader.py
index 1773f019a..6684bb5db 100644
--- a/Bootloaders/HID/HostLoaderApp_Python/hid_bootloader_loader.py
+++ b/Bootloaders/HID/HostLoaderApp_Python/hid_bootloader_loader.py
@@ -1,6 +1,8 @@
+#!/usr/bin/env python
+
 """
              LUFA Library
-     Copyright (C) Dean Camera, 2013.
+     Copyright (C) Dean Camera, 2018.
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
@@ -15,14 +17,15 @@
     Example:
         python hid_bootloader_loader.py at90usb1287 Mouse.hex
 
-    Requires the pywinusb (https://pypi.python.org/pypi/pywinusb/) and
-    IntelHex (http://bialix.com/intelhex/) libraries.
+    Requires the hidapi (https://pypi.python.org/pypi/hidapi) and
+    IntelHex (https://pypi.python.org/pypi/IntelHex) libraries.
 """
 
 import sys
-import pywinusb.hid as hid
+import hid
 from intelhex import IntelHex
 
+
 # Device information table
 device_info_map = dict()
 device_info_map['at90usb1287'] = {'page_size': 256, 'flash_kb': 128}
@@ -39,26 +42,32 @@ device_info_map['at90usb82']   = {'page_size': 128, 'flash_kb': 8}
 
 
 def get_hid_device_handle():
-    hid_device_filter = hid.HidDeviceFilter(vendor_id=0x03EB,
-                                            product_id=0x2067)
+    all_hid_devices = hid.enumerate()
 
-    valid_hid_devices = hid_device_filter.get_devices()
+    lufa_hid_devices = [d for d in all_hid_devices if d['vendor_id'] == 0x03EB and d['product_id'] == 0x2067]
 
-    if len(valid_hid_devices) is 0:
+    if len(lufa_hid_devices) is 0:
         return None
-    else:
-        return valid_hid_devices[0]
+
+    device_handle = hid.device()
+    device_handle.open_path(lufa_hid_devices[0]['path'])
+    return device_handle
 
 
 def send_page_data(hid_device, address, data):
-    output_report_data = [0]
-    output_report_data.extend([address & 0xFF, address >> 8])
-    output_report_data.extend(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.send_output_report(output_report_data)
+    hid_device.write(output_report_data)
 
 
-def main(hex_filename, device_info):
+def program_device(hex_data, device_info):
     hid_device = get_hid_device_handle()
 
     if hid_device is None:
@@ -66,23 +75,31 @@ def main(hex_filename, device_info):
         sys.exit(1)
 
     try:
-        hid_device.open()
-
-        print("Connected to bootloader.")
-
-        hex_data = IntelHex(hex_filename)
+        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']):
-            page_data = [hex_data[i] for i in range(addr, addr+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" % (addr, addr+device_info['page_size']))
+            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)
 
-        print("Programming complete, starting application.")
+        # 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:
@@ -90,12 +107,23 @@ def main(hex_filename, device_info):
 
 
 if __name__ == '__main__':
-    hex_filename = sys.argv[2]
+    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)
 
-    main(hex_filename, device_info)
+    program_device(hex_data, device_info)