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Calculator Community => Other Calc-Related Projects and Ideas => TI-Nspire => Topic started by: tangrs on March 17, 2013, 06:54:46 am

Title: LED protection in TI-Nspires partially cracked
Post by: tangrs on March 17, 2013, 06:54:46 am

Quote from: somewhere in TI's PTT documentation

The flashing LED is hardware-secure and cannot be impacted by coded software.

Lies! :P

At the moment, it only responds to writes to 90110b00 though - flashing still doesn't work. It probably needs more researching.

This one really had me stumped for a while. TI hid this one well. I've spent almost a year behind the scenes, on and off with this one.

A bit too long considering the final answer to the puzzle was actually pretty short :)

As to releases, I don't think I will until I'm convinced that this won't piss off TI. My interests in this was as a puzzle and its potential uses in the Linux kernel (as an indicator of hard drive activity for example) but somehow, I don't think TI thinks the same way.

Title: Re: LED protection in TI-Nspires partially cracked
Post by: ElementCoder on March 17, 2013, 09:43:23 am

Nice work. I had given up hope for the LED ever being cracked, but you did it. Disco time :P

Title: Re: LED protection in TI-Nspires partially cracked
Post by: floris497 on April 12, 2013, 03:16:08 pm

so how do we use it??

Title: Re: LED protection in TI-Nspires partially cracked
Post by: Sorunome on April 12, 2013, 07:04:01 pm

Pretty neat, it is pretty impressive IMO how much hackable it is......(the nspire)

Title: Re: LED protection in TI-Nspires partially cracked
Post by: Darl181 on April 12, 2013, 07:07:52 pm

So this means it might be possible to have Norse or similar on the CX eventually? Nice.

Title: Re: LED protection in TI-Nspires partially cracked
Post by: floris497 on April 13, 2013, 06:19:10 am

i was thinking of an indicator for the battery while it charges.

Title: Re: LED protection in TI-Nspires partially cracked
Post by: ben_g on April 13, 2013, 10:32:28 am

So you've spent A YEAR trying to control a tiny little LED light?
I'm sorry, but I don't get why you would go to all that trouble instead of simply using an onscreen indicator.
I hope this didn't sound rude to you. I just don't really see the point in spending so much time for something that simple.
EDIT: Not simple as in simple to do, but simple in that the effect seems very limited.

Title: Re: LED protection in TI-Nspires partially cracked
Post by: Lionel Debroux on April 13, 2013, 10:41:42 am

Quote

I don't get why you would go to all that trouble instead of simply using an onscreen indicator.

There are obvious uses for that tiny little LED, though, for instance USB MSD activity indication.

Quote

I hope this didn't sound rude to you.

It probably does...

Quote

I just don't really see the point in spending so much time for something that simple.

It's not that simple, mind you, otherwise it would have been done a couple years ago.

Title: Re: LED protection in TI-Nspires partially cracked
Post by: floris497 on April 13, 2013, 11:39:59 am

Quote from: ben_g on April 13, 2013, 10:32:28 am

So you've spent A YEAR trying to control a tiny little LED light?
I'm sorry, but I don't get why you would go to all that trouble instead of simply using an onscreen indicator.
I hope this didn't sound rude to you. I just don't really see the point in spending so much time for something that simple.
EDIT: Not simple as in simple to do, but simple in that the effect seems very limited.

if you read carefully he said this was a PUZZEL for him! and it is nice he won it :)