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 if we aren't here for some wisdom...what are we here for? - Molten [more] |
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| if we aren't here for some wisdom...what are we here for? - Molten [more] |
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#1
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on robot LCD?
I recall seeing (last 2 years) that someone was marketing a nicely packaged "on robot" LCD display that connected pretty simply to the cRIO (serial, I2C, or SPI). An hour's Googling tonight has not dug it up.
Can anyone give any pointers on where to find such a beast? My recollection was that was reasonably priced ($50-$75)... 
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#2
12-02-2014, 23:49
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Re: on robot LCD?
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#3
13-02-2014, 00:09
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Re: on robot LCD?
thanks. That was the exact item!
darnit if it's ain't available. In that case, looks like an offseason Arduino project (though the USB port on a RoboRIO may make this type of thing easier...)
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#4
13-02-2014, 00:34
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Re: on robot LCD?
We used a CrystalFontz CFA634 last year (until we needed extra weight for something else). It costs around $50, but we had one lying around.
We used it with SPI, which worked great (after we implemented SPI in java). Now that SPI has been included in the library, it should be easier to get started.
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#5
13-02-2014, 11:34
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Re: on robot LCD?
Joe: thanks for the recommendation. Was starting to head towards a roll-your-own (and we have an Arduino onboard already, which is helpful for such things, except our cRIO->Arduino interface is a 3 wide parallel).
Was willing to pay for something that was already cased and cabled, but this is why we have a 3d printer and lots of kids that like to solder.
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#6
13-02-2014, 11:54
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Re: on robot LCD?
Here is the class we used. It has been refactored to compile with the new SPI library, but has not been tested with the new library.
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#7
13-02-2014, 13:15
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Re: on robot LCD?
Joe: we haven't done any SPI yet, only a little custom I2C for 345 acceleromters. The displays are available for both SPI and I2C (and USB, and parallel, and serial...)
In your experience, would there be a strong reason to prefer either I2C or SPI for a new setup?
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#9
14-02-2014, 11:51
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Re: on robot LCD?
I'm not sure that I2C, SPI, or serial get much testing in the FRC environment. I would probably lean towards serial as being easier to debug, unless you were using it at high utilization.
I2C has less wires and is easier to expand then SPI.
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