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by gsh
Sat Sep 19, 2015 8:49 am
Forum: Official Foundation Display
Topic: Multiscreen=AWESOME- how to support via Python/PyGame?
Replies: 22
Views: 9237

Re: Multiscreen=AWESOME- how to support via Python/PyGame?

Can you push it back, it looks like the change for the touchscreen was missed out

Gordon
by gsh
Sat Sep 19, 2015 8:32 am
Forum: Official Foundation Display
Topic: Official Pi Display - No Touch
Replies: 25
Views: 5810

Re: Official Pi Display - No Touch

Yes, now I'd suggest RMAing the display, it clearly requires further investigation

Gordon
by gsh
Fri Sep 18, 2015 2:18 pm
Forum: Beginners
Topic: Sleep Mode - and or turn off backlight?
Replies: 203
Views: 111264

Re: Sleep Mode - and or turn off backlight?

I'm trying to write it now, but have picked up a cold and therefore am sat at home trying to do it remotely which isn't good!
by gsh
Fri Sep 18, 2015 2:09 pm
Forum: Official Foundation Display
Topic: New Display - Cursor Jumps and Clicks all over the place
Replies: 25
Views: 13220

Re: New Display - Cursor Jumps and Clicks all over the place

If it is any connection problem it'll be the touch screen connector (the small 6 pin one).

If that doesn't fix it, then I think it's got to be a test escape so send it back to where-ever you bought it

Gordon
by gsh
Fri Sep 18, 2015 1:48 pm
Forum: Official Foundation Display
Topic: New Display - Cursor Jumps and Clicks all over the place
Replies: 25
Views: 13220

Re: New Display - Cursor Jumps and Clicks all over the place

I'd suggest checking the connections to the touchscreen and display conversion board, it does sound like you've got noise from a ground loop or floating ground being pulled into the touchscreen circuit. I assume you don't have any other hardware wired up? Also try changing the power supply wiring Go...
by gsh
Fri Sep 18, 2015 7:50 am
Forum: Official Foundation Display
Topic: Display white (not working)
Replies: 16
Views: 7118

Re: Display white (not working)

What does lsmod give you?

Also try:

sudo apt-get install evtest
evtest

(select the events from rpi-ft5406)

Touch the screen, does that work?

Gordon
by gsh
Fri Sep 18, 2015 6:28 am
Forum: Official Foundation Display
Topic: Official Pi Display - No Touch
Replies: 25
Views: 5810

Re: Official Pi Display - No Touch

Try apt-get install evtest

then just run it, it should give you a list of events one of which should be rpi-ft5406, choose that one then touch the screen

Gordon
by gsh
Thu Sep 17, 2015 7:19 pm
Forum: Official Foundation Display
Topic: Display white (not working)
Replies: 16
Views: 7118

Re: Display white (not working)

If it turns white, that means that it has been detected by the Raspberry Pi firmware, this means that the DSI communication between the Pi and the display board is good. But the data isn't correctly getting through to the display. So as JimmyN says it's likely to be the big DPI connector that's the ...
by gsh
Thu Sep 17, 2015 3:12 pm
Forum: Official Foundation Display
Topic: Official Pi Display - No Touch
Replies: 25
Views: 5810

Re: Official Pi Display - No Touch

Check that the little ribbon connector is properly connected....

When you apt-get update'd did it throw any warnings or errors?
by gsh
Thu Sep 17, 2015 11:01 am
Forum: Official Foundation Display
Topic: Multiscreen=AWESOME- how to support via Python/PyGame?
Replies: 22
Views: 9237

Re: Multiscreen=AWESOME- how to support via Python/PyGame?

Sorry I've not been able to try it yet (haven't had the time!) but I believe you need to build and install the latest version from github, is that what you used?

Gordon
by gsh
Thu Sep 17, 2015 8:30 am
Forum: Official Foundation Display
Topic: STICKY: Official Touchscreen Display FAQ
Replies: 51
Views: 74259

Re: Official Touchscreen Display FAQ

Does the red LED on the Raspberry Pi go out? If so then the problem is the voltage to the Pi is dropping out.

Otherwise it is possible that the introduction of the screen is fouling the DAC I2C communications

Gordon
by gsh
Thu Sep 17, 2015 8:16 am
Forum: Official Foundation Display
Topic: HDMI+7" output
Replies: 7
Views: 2784

Re: HDMI+7" output

You need to modify the code to achieve this, there is no shell or script thing that can be done
by gsh
Wed Sep 16, 2015 12:22 pm
Forum: Official Foundation Display
Topic: Longer DSI ribbon
Replies: 8
Views: 4158

Re: Longer DSI ribbon

Actually it'll almost definitely be compliant anyway, all the noise came from off the board rather than down the ribbon cable, although the signals are running at 700MBits they are only 200mV differential. But you're right I would never sell the device in that configuration for that reason...

Gordon
by gsh
Wed Sep 16, 2015 10:02 am
Forum: Official Foundation Display
Topic: Display / Pi Power - Wiring
Replies: 12
Views: 4733

Re: Display / Pi Power - Wiring

No damage will occur if you drive the power from the Pi to the display, but you will find that the voltage on the display will be lower. I'm not sure at what voltage the display will drop out, I'd have to go through all the schematics and specs again but it's probably fine (since there are LDOs and ...
by gsh
Wed Sep 16, 2015 7:03 am
Forum: Official Foundation Display
Topic: New 7 Inch Raspberry Pi Touchscreen
Replies: 9
Views: 4615

Re: New 7 Inch Raspberry Pi Touchscreen

No there are no options required to make it go to the LCD... If you are seeing a splash screen this means the LCD is working... I would suspect the buildroot more...

What happens if you unplug the LCD and plug in an HDMI, does it work faultlessly?

Gordon
by gsh
Wed Sep 16, 2015 5:57 am
Forum: Official Foundation Display
Topic: New 7 Inch Raspberry Pi Touchscreen
Replies: 9
Views: 4615

Re: New 7 Inch Raspberry Pi Touchscreen

It requires an update to the firmware for Ubuntu, please contact the Ubuntu distribution people for this...
by gsh
Wed Sep 16, 2015 5:55 am
Forum: Official Foundation Display
Topic: Display with Raspberry pi Model B Rev 2.0
Replies: 5
Views: 1665

Re: Display with Raspberry pi Model B Rev 2.0

Actually it's slightly more involved than that, on the rev 2 hardware you'll need to connect SDA/SCL to the GPIO with the flying jumper wires, but I've not finished documenting how to do this!

Gordon
by gsh
Wed Sep 16, 2015 5:48 am
Forum: Official Foundation Display
Topic: HDMI+7" output
Replies: 7
Views: 2784

Re: HDMI+7" output

When you say eglfs, it sounds like the qt library may be accessing EGL directly which would mean it would be supplying a display number to the dispmanx_display_open function this is the thing you need to change to move the EGL overlay to the LCD.
by gsh
Wed Sep 16, 2015 5:45 am
Forum: Official Foundation Display
Topic: RPi Model B+ and Official Touchscreen Issue
Replies: 1
Views: 1028

Re: RPi Model B+ and Official Touchscreen Issue

It may be that you are experiencing the bug I fixed with the I2C communications two days back, try:

sudo rpi-update

and see if that fixes the problem
by gsh
Tue Sep 15, 2015 6:18 pm
Forum: Official Foundation Display
Topic: Multiscreen=AWESOME- how to support via Python/PyGame?
Replies: 22
Views: 9237

Re: Multiscreen=AWESOME- how to support via Python/PyGame?

Question is how does pygame access the screen, if it uses /dev/fb0 to write pixels to the screen then it will not work right now... Whereas if it uses direct access of a dispmanx framebuffer then it is possible to change it to output to the other screen by changing the parameter to dispmanx_display_...
by gsh
Tue Sep 15, 2015 5:23 pm
Forum: Official Foundation Display
Topic: Display / Pi Power - Wiring
Replies: 12
Views: 4733

Re: Display / Pi Power - Wiring

I tend to power the display directly and then use the jumpers to power the Pi. This works fine for me using the official Raspberry Pi power supply, note that not all power supplies are equal and it is possible that you've got a problem with it drooping slightly (this will not happen with the Raspber...
by gsh
Tue Sep 15, 2015 5:17 pm
Forum: Official Foundation Display
Topic: Official Touch Screen and Xorg
Replies: 57
Views: 46505

Re: Official Touch Screen

Currently you can't do that because it requires a second /dev/fb implementation for the touchscreen and one doesn't yet exist. If you can understand how the fbdev currently works and can easily provide a second one then it would be possible with a small amount of input from Dom and I to pass a secon...
by gsh
Tue Sep 15, 2015 5:08 pm
Forum: Official Foundation Display
Topic: RPi Touchscreen - How to turn it off?
Replies: 42
Views: 80914

Re: RPi Touchscreen - How to turn it off?

Yeah, Dom's right, The code to initialise the display is not hot pluggable, so you can't just pull the power from the display it just won't come back! The PWM controls and the power on/off controls are hidden away in a little Atmel which has to be controlled from the GPU side (it has to be this way ...
by gsh
Tue Sep 08, 2015 11:02 am
Forum: General discussion
Topic: WOT ? No official display thread ?
Replies: 18
Views: 4776

Re: WOT ? No official display thread ?

Thanks, it's only taken two and a half years!

Gordon
by gsh
Sat Aug 29, 2015 1:14 pm
Forum: Compute Module
Topic: No "/boot/bcm2708-rpi-cm.dtb" file
Replies: 13
Views: 2822

Re: No "/boot/bcm2708-rpi-cm.dtb" file

Other thing to try is to use raspi-gpio tool to check the state of the I2C pins

sudo apt-get install raspi-gpio

sudo raspi-gpio get

Post the results, what pins are you using for the I2C?

Gordon

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