Thread: PRS-500 How to get reader's serial # through USB?
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Old 02-10-2007, 03:38 AM   #13
kovidgoyal
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In my experience the reader never spontaneously has anything to say. The protocol seems to be entirely host driven. I also don't understand why they'd need to poll the reader. The USB system on the host should inform them if the device is disconnected.

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

Quote:
Originally Posted by scotty1024
The Sony of course uses a high level VFS based protocol and doesn't deal in anything as crude as blocks of raw disk data.

I've decoded the Sony Heart Beat.

They do this once per second to make sure the Sony Reader is still there (or perhaps poll to see if the Reader has anything to say?):

Code:
0x40  0x80  : 0x00 0x01 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0xc0  0x81  : 0x00 0x10 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00
              0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
BULKR 0x81  : 0x02 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x08 0x00 0x00 0x00
              0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x40  0x80  : 0x00 0x10 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x10 0x00 0x00 0x00
              0x02 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0xc0  0x81  : 0x00 0x10 0x00 0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x0c 0x00 0x00 0x00
              0x00 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
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