Extended the programming script for the ps2avrGB keyboard series:

- a keyboard already in bootloader mode will now be detected
- if setting the keyboard to bootloader mode doesn't work, a hint will be printed on how to do so
- instead of failing instantly when no keyboard is found, the script will now wait up to 60 seconds (it retries every 5 seconds, up to 12 times)

keyboards/ps2avrGB/program

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
+# Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>, Sebastian Kaim <sebb@sebb767.de>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -21,18 +21,25 @@ import sys
 import time
 import usb
 
-if len(sys.argv) < 2:
-    print('Usage: %s <firmware.hex>' % sys.argv[0])
-    sys.exit(1)
 
-print('Searching for ps2avrGB... ', end='')
+def checkForKeyboardInNormalMode():
+    """Returns a device if a ps2avrGB device in normal made (that is in keyboard mode) or None if it is not found."""
+    return usb.core.find(idVendor=0x20A0, idProduct=0x422D)
 
-dev = usb.core.find(idVendor=0x20A0, idProduct=0x422D)
+def checkForKeyboardInBootloaderMode():
-if dev is None:
+    """Returns True if a ps2avrGB device in bootloader (flashable) mode is found and False otherwise."""
-    raise ValueError('Device not found')
+    return (usb.core.find(idVendor=0x16c0, idProduct=0x05df) is not None)
 
-print('Found', end='\n\n')
+def flashKeyboard(firmware_file):
+    """Calls bootloadHID to flash the given file to the device."""
+    print('Flashing firmware to device ...')
+    if os.system('bootloadHID -r "%s"' % firmware_file) == 0:
+        print('\nDone!')
+    else:
+        print('\nbootloadHID returned an error.')
 
+def printDeviceInfo(dev):
+    """Prints all infos for a given USB device"""
     print('Device Information:')
     print('  idVendor: %d (0x%04x)' % (dev.idVendor, dev.idVendor))
     print('  idProduct: %d (0x%04x)' % (dev.idProduct, dev.idProduct))
@@ -40,8 +47,9 @@ print('Manufacturer: %s' % (dev.iManufacturer))
     print('Serial: %s' % (dev.iSerialNumber))
     print('Product: %s' % (dev.iProduct), end='\n\n')
 
-print('Transferring control to bootloader... ', end='')
+def sendDeviceToBootloaderMode(dev):
-
+    """Tries to send a given ps2avrGB keyboard to bootloader mode to allow flashing."""
+    try:
         dev.set_configuration()
 
         request_type = usb.util.build_request_type(
@@ -52,23 +60,45 @@ request_type = usb.util.build_request_type(
         USBRQ_HID_SET_REPORT = 0x09
         HID_REPORT_OPTION = 0x0301
 
-
+        dev.ctrl_transfer(request_type, USBRQ_HID_SET_REPORT, HID_REPORT_OPTION, 0, [0, 0, 0xFF] + [0] * 5)
-try:
-    dev.ctrl_transfer(
-            request_type,
-            USBRQ_HID_SET_REPORT,
-            HID_REPORT_OPTION,
-            0,
-            [0, 0, 0xFF] + [0] * 5
-            )
     except usb.core.USBError:
         # for some reason I keep getting USBError, but it works!
         pass
 
-# wait a bit until bootloader starts up
-time.sleep(2)
 
-print('OK')
+if len(sys.argv) < 2:
-print('Programming...')
+    print('Usage: %s <firmware.hex>' % sys.argv[0])
-if os.system('bootloadHID -r "%s"' % sys.argv[1]) == 0:
+    sys.exit(1)
-    print('\nDone!')
+
+kb = checkForKeyboardInNormalMode()
+
+if kb is not None:
+    print('Found a keyboad in normal mode. Attempting to send it to bootloader mode ...', end='')
+    sendDeviceToBootloaderMode(kb)
+    print(' done.')
+    print("Hint: If your keyboard can't be set to bootloader mode automatically, plug it in while pressing left control to do so manually.")
+
+attempts = 12  # 60 seconds
+found = False
+for attempt in range(1, attempts + 1):
+    print("Searching for keyboard in bootloader mode (%i/%i) ... " % (attempt, attempts), end='')
+
+    if checkForKeyboardInBootloaderMode():
+        print('Found', end='\n\n')
+        flashKeyboard(sys.argv[1])
+        found = True
+        break
+    else:
+        print('Nothing.', end='')
+
+        if attempt != attempts:  # no need to wait on the last attempt
+            print(' Sleeping 5 seconds.', end='')
+            time.sleep(5)
+
+        # print a newline
+        print()
+
+if not found:
+    print("Couldn't find a flashable keyboard. Aborting.")
+    sys.exit(2)
+