4D Systems 4DCAPE-70T, no display

[Brian Yee]

A couple of weeks ago I installed a 4D Systems 4DCAPE-70T on my BBB board and powered it up.
I was able to connect via USB but there was no display on the LCD cape.  I also tried to run it standalone
with a USB mouse and keyboard (no HDMI display attached) but still no display.

Has anyone else had luck with this, and what hardware/OS configuration did you use?  Any known
problems or hints?

Thanks,

Brian

[beaglefan]

Hey Brian

You may want to power the BBB from the 5V power jack. I have similar issue when using BBView 7" LCD from Embest/Element 14. 

I got it powered with 5Vdc/4A adapter and everything works fine.

Regards

Halim

[Brian Yee]

Halim,

Thanks for your email.  Yes, I did power the board from a Tektronix lab power supply set at 5 volts
just to be sure it had enough power, but no luck.  I will try again this weekend, but I wonder if there is
some software setup issue that I overlooked.

Thanks,

Brian

[Terry Storm]

Hi Brian

What OS are you trying to run on it?

Have you read through the datasheet they provide, if you are trying to run Android.... ?

Regards

Terry

[Brian Yee]

Terry, I am running version:  Linux beaglebone 3.8.6 #1 SMP Sat Apr 13 09:10:52 CEST 2013 armv7l GNU/Linux

Brian


On Thursday, January 2, 2014 9:19:26 AM UTC-8, Brian Yee wrote:

[Terry Storm]

Hi Brian

Sorry I don't know what that is. What distribution is that?

Have you tried Android or Angstrom to verify the CAPE works correctly first?

Terry

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[William Hermans]

Thats the version of angstrom the BBB shipped with back in June last year ( e.g. when it first started shipping to the general public ). AKA, ancient.

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[Terry Storm]

That might be the problem then.

The 4DCAPE-70T is based on the LCD7 A3, and the LCD7 A3 support on Angstrom only came out in August 2013 I believe.

So reflash using the latest image and it should work, albeit the touch related issues which are discussed elsewhere.

You could try the latest test release: http://downloads.angstrom-distribution.org/demo/beaglebone/testing/BBB-eMMC-flasher-v2013.06-2014.01.03.img.xz

Else flash Android which is linked in the Datasheet from 4D, which does work correctly.

[dlewin555]

a silly question but this may happends anyway : 

did you checked that your board is plugged into the correct side ? 

[Brian Yee]

Yes, I double checked the insertion of the board.  Also, the LED's came on and the reset and power switches worked ok.

I also flashed the latest image from the BeagleBoard.org site:  BBB-eMMC-flasher-2013.09.04.img.xz

with the same results.  The images suggested earlier (BBB-eMMC-flasher-v2013.06-2014.01.03.img.xz) had some errors

when I tried to unpack them with 7-Zip.

I may try ordering a cape from another vendor (Circuitco) and see if that has the same problem.  I am presuming it

uses the same driver.

TIA for the dialog on this from everyone.

Brian

[Terry Storm]

Is the USER LED flashing for you, or on solid?

If its not flashing then I don't think the Cape has been identified by the BBB correctly.

If you cant get it working, then you might have a dud one. Claim RMA and get it replaced.

[Brian Yee]

Terry,

Yes, the user light is on solid.  The curious thing is that this behaviour is the same for a couple of

other BeagleBoards and 4D LCD shields.  I don't think it is the hardware, unless there is some
sort of design problem.  Have you gotten one to work?

Thanks,

Brian

[Terry Storm]

Yes mine work fine

I have a LCD4, LCD7, 4DCAPE-43T and 4DCAPE-70T

What other 4D LCD shields do you have which dont work?

Terry

[David Lewin]

Ok indeed. For the records, and to answer your previous question : I have the same one 4"3 cape

and it worked right away with Angstrom and Debian.

2014/1/8 Brian Yee <brian...@gmail.com>

[Brian Yee]

Wow, thanks guys.  Now I'm very puzzled.  The only other thing might be the address jumpers, 

which I left in the default position (open).  I did try them in the other positions with the same results.

Brian

[Terry Storm]

Silly question, but you have your BBB plugged onto the CAPE in the correct orientation when the BBB is switched off.... right? then power it on...?

Rather than hot plugging it...

Jumpers, you need to have both connected/closed if you are using Android, but in any position if using Linux I believe.

May be something wrong with your one. Contact who ever you purchased it from and request a RMA.

[Brian Yee]

Terry,

Yes, they were plugged into the BB when I applied power, and in the correct orientation.  I was using
a lab-grade power supply, and didn't see any indications of excessive current.

Brian

[Moez Essid]

any idea when it work perfectly but i hear a noise ??
please help