PRS-500 How to get reader's serial # through USB?

[scotty1024]

Originally Posted by kovidgoyal

In my experience the reader never spontaneously has anything to say.

...

Just goes to show that the heart really is good for nothing ;-)

I just caught this off one of the heart beat's....

Result in bulk transfer was:

 02 00 01 00 00 00 00 00 00 00 00 00 08 00 00 00   ................
 00 00 02 01 00 00 00 00                           .......

Right after that CONNECT issued this:

53 00 00 00 01 00 00 00 00 00 00 00 07 00 00 00   S...............
 03 00 00 00 62 3A 2f                               ....b:/

That was during the initial startup after plugging the Reader into CONNECT.

Hmm, did the Reader suddenly announce "I've got a SD card!"???

I'll have to try this again with MS and nothing...

[kovidgoyal]

EDIT: Looking at my code, I always sent 8bytes as the key, never 4

Hmm the screen lock code is still 4 characters in length, so this seems to be pretty pointless.

Originally Posted by scotty1024

Anyway, this is a change in the new firmware I think, this is the unlock device packet being sent by the new CONNECT software:

06 01 00 00 01 00 00 00 00 00 00 00 08 00 00 00   ................
2D 31 00 00 00 00 00 00                           -1.....

You will note it is now 8 bytes of payload. Apparently the Reader still supports the older 4 byte model.

[kovidgoyal]

You are correct that does cause the do not disconnect to show up. Interestingly, sending the end session changes the text to 'USB Connected' but not the icon. A SONY bug?

Originally Posted by scotty1024

Hmm looks like Igorsky may have gotten one wrong...

0x40  0x80  : 0x01 0x00 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x04 0x00 0x00 0x00
              0x01 0x00 0x00 0x00
0xc0  0x81  : 0x00 0x10 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00
              0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

So I'm thinking command number 1 is really SessionBeginEnd not ReqEndSession with the payload of DWORD 0 for end and 1 for start.

I'm going to try this and see if that turns on the "Don't disconnect me" icon.

[scotty1024]

Originally Posted by kovidgoyal

EDIT: Looking at my code, I always sent 8bytes as the key, never 4

Hmm the screen lock code is still 4 characters in length, so this seems to be pretty pointless.

The --log-packets says 4 and the source code I have says 4...

class UnlockDevice(ShortCommand):
    """ Unlock the device """
    NUMBER = 0x106 #: Command number
    def __init__(self, key=0x312d):
        ShortCommand.__init__(self, \
        number=UnlockDevice.NUMBER, type=0x01, command=key)

class ShortCommand(Command):

    """ A L{Command} whoose data section is 4 bytes long """

    SIZE = 20 #: Packet size in bytes
    # Usually carries additional information
    command = field(start=16, fmt=DWORD)

    def __init__(self, number=0x00, type=0x00, command=0x00):
        """
        @param number: L{Command.number}
        @param type: L{Command.type}
        @param command: L{ShortCommand.command}
        """
        Command.__init__(self, ShortCommand.SIZE)
        self.number  = number
        self.type    = type
        self.length  = 4
        self.command = command

I believe the hard coded "self.length = 4" seals the deal.

        res = self.send_validated_command(SetBulkSize(size=0x028000))
        if res.code != 0:
            raise ProtocolError("Unable to set bulk size.")
        self.send_validated_command(UnlockDevice(key=0x312d))

[kovidgoyal]

I'm not sure what vintage your copy of the code is, but revision 209 https://libprs500.kovidgoyal.net/changeset/209 (when I implemented device unlocking) had the following structure for UnlockDevice commands. May have been 4 before that.

class UnlockDevice(Command):
""" Unlock the device """
NUMBER = 0x106 #: Command number
key = stringfield(8, start=16) #: The key defaults to -1

def __init__(self, key='-1\0\0\0\0\0\0'):
Command.__init__(self, 24)
self.number = UnlockDevice.NUMBER
self.type = 0x01
self.length = 8
self.key = key