keeping the I/O line Low causes the calc to crash?
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keeping the I/O line Low causes the calc to crash?
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Foxman


Newbie


Joined: 06 May 2009
Posts: 12
Posted: 15 May 2009 03:12:37 pm    Post subject:
Hey it's me again, causing trouble in the TI world. :blush:

I'm trying to keep as close to serial linking protocols as possible and one of those is to keep or start with the line low at 0v. but as most know the calc stays high between 3.5 - 5v (at least mines that way) but when I use the simple out command at the beginning to set the line low the calc crashes? but if you immediately set the line high again just after setting it low the calc won't crash. Thanks for your help! Rolling Eyes
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benryves


Active Member


Joined: 23 Feb 2006
Posts: 564
Posted: 15 May 2009 04:10:06 pm    Post subject:
What do you mean by "crash"?

The calculator has a link interrupt that kicks in when either line goes low and tries to receive a byte. (This is why the calculator freezes if you plug headphones into it).
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Foxman


Newbie


Joined: 06 May 2009
Posts: 12
Posted: 15 May 2009 04:56:07 pm    Post subject:
benryves wrote:
What do you mean by "crash"?

The calculator has a link interrupt that kicks in when either line goes low and tries to receive a byte. (This is why the calculator freezes if you plug headphones into it).



interrupts aren't the problem, I've disabled them before hand, but when I set either the tip or the ring low and continue with the program the calc slows down until all RAM is used and then resets itself. If that makes any sense
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calc84maniac


Elite


Joined: 22 Jan 2007
Posts: 770
Posted: 15 May 2009 10:55:20 pm    Post subject:
"All RAM is used"? Explain.
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Foxman


Newbie


Joined: 06 May 2009
Posts: 12
Posted: 23 May 2009 01:43:09 am    Post subject:
calc84maniac wrote:
"All RAM is used"? Explain.



sorry I meant an overflow
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Galandros


Active Member


Joined: 29 Aug 2008
Posts: 565
Posted: 26 May 2009 12:18:09 pm    Post subject:
Overflows must be a really bad crash on a real calculator... How bad can it be?

In emulator I did one. It made all memory the same 2 bytes... I was too bored debugging to laugh about the overflow. xD

Sorry the offtopic, but I couldn't resist. I am on my rare spamm days and today I discharged on UTI. Razz
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keeping the I/O line Low causes the calc to crash?
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