LCD + Keypad for BBB?

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
jlbeck
 
Posts: 26
Joined: Fri Aug 09, 2013 11:45 am

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.

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

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.

User avatar
jlbeck
 
Posts: 26
Joined: Fri Aug 09, 2013 11:45 am

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
 
Posts: 4
Joined: Mon Aug 12, 2013 12:03 pm

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?

User avatar
jlbeck
 
Posts: 26
Joined: Fri Aug 09, 2013 11:45 am

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?

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

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.

User avatar
jlbeck
 
Posts: 26
Joined: Fri Aug 09, 2013 11:45 am

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.

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

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.

User avatar
jlbeck
 
Posts: 26
Joined: Fri Aug 09, 2013 11:45 am

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 1850 times
front.jpg
front.jpg (573.76 KiB) Viewed 1850 times

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

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.

User avatar
jlbeck
 
Posts: 26
Joined: Fri Aug 09, 2013 11:45 am

Re: LCD + Keypad for BBB?

Post by jlbeck »

Success! :D
Attachments
ipclock.jpg
ipclock.jpg (138.38 KiB) Viewed 1803 times
Last edited by jlbeck on Wed Sep 11, 2013 9:43 pm, edited 1 time in total.

User avatar
adafruit_support_bill
 
Posts: 88096
Joined: Sat Feb 07, 2009 10:11 am

Re: LCD + Keypad for BBB?

Post by adafruit_support_bill »

Awesome!

User avatar
R_D_Childers
 
Posts: 1
Joined: Fri Dec 02, 2016 8:50 pm

Re: LCD + Keypad for BBB?

Post by R_D_Childers »

Congratulations.

Locked
Please be positive and constructive with your questions and comments.

Return to “Beagle Bone & Adafruit Beagle Bone products”