LCD + Keypad for BBB?

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jlbeck
 
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LCD + Keypad for BBB?

Post by jlbeck »

Are there any plans to develop a similiar product for the Beaglebone Black as the Pi?

I've looked at alternatives such as the LCD4 cape. It's expensive and consumes most of the ADC pins.

I've also examined connecting a HD44780 LCD directly to the GPIO pins but the device tree overlays for muxing
the pins is killing me.

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adafruit_support_bill
 
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Re: LCD + Keypad for BBB?

Post by adafruit_support_bill »

I've also examined connecting a HD44780 LCD directly to the GPIO pins but the device tree overlays for muxing
the pins is killing me.
The Pi-Plate interface is 3.3v i2c. You should be able to get it to run on the BBB.

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jlbeck
 
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Re: LCD + Keypad for BBB?

Post by jlbeck »

Based on what I'm reading the Adafruit_CharLCDPlate.py should work too. Cool, I'll give it a try.

spoonPi
 
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Re: LCD + Keypad for BBB?

Post by spoonPi »

I'm looking at either the BeagleBone Black or the Raspberry Pi, but b/c the BBB is a bit faster in the CPU category, I'm leaning BBB... I'd like to get a nice LCD, I've seen a few on here and from 4D (like the 4D 4.3 LCD cape). Does it really matter which LCD I pick? I've never laid hands on a Raspberry Pi or a BBB, but I get that GPIO pins and other contacts are used for, however I'd like something clean and "pin minimal". My questions is this, which LCD's are testing and working with the BBB? Are there loads more that are supported for the Raspberry Pi? Is it just the supporting libs that are in question or do the GPIO and other connections make or break wether an LCD is going to work with BBB or not?

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jlbeck
 
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Re: LCD + Keypad for BBB?

Post by jlbeck »

Ok, here's a followup.

I have a Blue&Whie Pi Plate connected to the BBB. I've connected GND, VDD_5V, SDA and SCL.

Running the Adafruit_CharLCDPlate.py I can turn the backlight on/off, clear the screen and read the buttons.
However, whenever I try to write a message to the screen all I get is white blocks or partial blocks.

Any clues?

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adafruit_support_bill
 
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Re: LCD + Keypad for BBB?

Post by adafruit_support_bill »

If you post photos of the front & back of the board we can check your assembly.

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jlbeck
 
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Re: LCD + Keypad for BBB?

Post by jlbeck »

As ugly as it looks I have ohmed out the connections. Seems ok. Did I do the right thing since the blue&white
LCD only has 16 pins?
Last edited by jlbeck on Thu Sep 05, 2013 9:28 am, edited 1 time in total.

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adafruit_support_bill
 
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Re: LCD + Keypad for BBB?

Post by adafruit_support_bill »

Hard to see much in those photos. Post larger ones if you can (about 800x600 is good). And shoot near a window or even outside in daylight to avoid the glare from the on-camera flash.

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jlbeck
 
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Re: LCD + Keypad for BBB?

Post by jlbeck »

Sorry about those first. Here's a second attempt.
Attachments
back.jpg
back.jpg (567.15 KiB) Viewed 1590 times
front.jpg
front.jpg (573.76 KiB) Viewed 1590 times

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adafruit_support_bill
 
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Re: LCD + Keypad for BBB?

Post by adafruit_support_bill »

The soldering looks mostly OK. Some of the top-side display joints look a bit solder-starved (at least from this angle). Touch these up a bit. If it doesn't improve the situation, we can replace the display.

Also, the header should really be fully soldered. You have all the required power and signal pins, but this is a mechanical connection too. With a single header on the edge of the board, the combined weight of the board and display can put a lot of stress on the header solder joints.

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jlbeck
 
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Re: LCD + Keypad for BBB?

Post by jlbeck »

Success! :D
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Last edited by jlbeck on Wed Sep 11, 2013 9:43 pm, edited 1 time in total.

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adafruit_support_bill
 
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Re: LCD + Keypad for BBB?

Post by adafruit_support_bill »

Awesome!

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R_D_Childers
 
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Re: LCD + Keypad for BBB?

Post by R_D_Childers »

Congratulations.

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