Subject:
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Re: useful battery program
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Wed, 12 Jan 2000 01:58:25 GMT
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Viewed:
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3959 times
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Ben Jackson schrieb:
> Here's a short program to display the battery voltage. The get_battery_mv()
> interface might be useful in the kernel itself. Would it be appropriate for
> the kernel to turn on the low battery indicator as well? The A/D converter
> that the RCX uses to measure this is pretty accurate. I compared the output
> against a Fluke multimeter and the RCX was consistently within 0.05v.
Yes, this is a good idea. The system timer handler will probably become
a C routine, anyway, as it does so many things now. It might as well
check for low battery power and display it.
I was thinking about a configuration option to change the view button's
function, too, make it more of a monitor of sensor data. This would fit
in nicely.
> While writing this it occured to me that cls() would be more useful if it also
> cleared the dots in the number output area. Does that sound like a good idea?
> I can submit the trivial diff if so...
Hmmm. Not sure. I had intended the text area to be available for user
programs while they run, so cls just clears that. lcd_clear() should be
used by the kernel to clear everything. I tend to think of the graphical
symbols as permanent or independent status displays.
A lot of people seem to need printf these days... I thought networking
and especially lnpd would alleviate the five-character situation
somewhat. A printf of less than 500 bytes code would be a nice
configuration option, I think, but anything larger is probably more of a
burden.
Markus.
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Message has 1 Reply:
 | | Re: useful battery program
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| (...) Yes, the current behavior of displaying the return address for the interrupt handler isn't very useful. :-) I was considering making it display battery voltage. It would be neat if some combination of VIEW and other buttons could be used to do (...) (27 years ago, 12-Jan-00, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | useful battery program
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| Here's a short program to display the battery voltage. The get_battery_mv() interface might be useful in the kernel itself. Would it be appropriate for the kernel to turn on the low battery indicator as well? The A/D converter that the RCX uses to (...) (27 years ago, 12-Jan-00, to lugnet.robotics.rcx.legos)
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