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#1 |
Connoisseur
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Join Date: Aug 2006
Location: Ipswich, UK
Device: Irex Iliad
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The six unused connections
I have finally had a chance to look at the spare connections on the Iliad. This is what I found:
13 - wired to 17 in the plug, but held to ground when disconnected 14 - High impedance, either an input or N/C 15 - signal on this line (see below) 16 - held to ground 17 - wired to 13, high impedance when disconnected, probably plug sense input 18 - High impedance, either an input or N/C The only interesting pin was 15. This is nominally high (3.5v), but emits a start bit followed series of 16 data bits at approximately 9600 baud whenever a key is pressed or released. As far as I can tell, no other data (like a console) is present on this pin. Sometime soon I'll take the thing apart and have a poke around inside for anything that might be a console. |
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#2 | |
Fully Converged
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Join Date: Oct 2002
Location: Switzerland
Device: Too many to count here.
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Quote:
-> moved to the development section. |
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#3 | |
Guru
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Join Date: Oct 2005
Device: NCR3125, Nokia 770,...
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Quote:
On other hand, there is still the internal connector if they want to have a serious debug. |
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#4 |
Banned
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Join Date: Jul 2006
Location: Peoples Republic of Washington
Device: Reader / iPhone / Librie / Kindle
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RS-232 format is:
1 Start bit 8 Data bits 1 parity bit 1 or 2 stop bits (usually 1) So at most 12 bits, not 16. The only thing I can think of that is framed 16 bits and would be emitted when a "key is pressed" would be Tribble's much beloved "Thonk" soud e.g. a digital audio output pin. But a single 16 bit frame wouldn't carry much Thonk in it. But they may not have gotten around to making it work correctly yet. ![]() |
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#5 |
Addict
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Join Date: Jul 2006
Device: iliad
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That's interesting.
I will try to think about it. At the moment i'd bet on custom debug. |
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#6 |
Addict
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Join Date: May 2006
Device: Iliad, dude!
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I just got my Iliad back. It's been opened, just to do a reinstall.
My files are still there, so I don't know what they did. But I think they wouldn't open it if there was a JTAG interface or any other write access in the external connector. |
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#7 |
iLiad Maniac
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Join Date: Apr 2006
Location: Germany
Device: Bookeen Opus (i love that thing) and iPad (what an irony)
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Thats sad.
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#8 | |
Guru
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Device: NCR3125, Nokia 770,...
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Ah, can we asume you have captured the signal with a digital oscilloscope so you can guess the baud rate from the size of the pulses? Or did you use a different setup?
Also, where you able to count how long the whole series was? Quote:
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#9 | |
Connoisseur
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Join Date: Aug 2006
Location: Ipswich, UK
Device: Irex Iliad
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Quote:
Yes - the pulses were 100 microseconds minimum, giving approx 9600 baud, and each pulse train was 16 bits long. Further investigation has shown that the same pulse train seems to be sent whatever key is pressed. |
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#10 | |
Addict
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Join Date: May 2006
Device: Iliad, dude!
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Quote:
Whenever you press a key, something like this appears in the log, hence on the console: Code:
<event time="012" type="button"><key>newspapers<key></event> |
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#11 | |
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Quote:
Last edited by arivero; 09-13-2006 at 08:54 AM. |
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