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by john.t
Tue Jun 20, 2017 10:44 am
Forum: Advanced users
Topic: script for rca
Replies: 14
Views: 2352

Re: script for rca

DougieLawson wrote:You can use the tvservice command to switch between RCA and HDMI and back again. No reboot needed.
What commands do you need to type in order for this to work without the use of reboot?? ive tried it but sometimes my screen jus turn black when i switch to one or the other
by john.t
Mon Apr 10, 2017 10:46 am
Forum: Python
Topic: Showing an image with gpio
Replies: 23
Views: 5274

Re: Showing an image with gpio

Is there a way to resize/scale the image resolution of your python generated image?I was able to make a python code that generates a test image.but the screen size is constant i would like to be able to resize/scale the resolution from 1920x1080 to a lower resoluton for example.Can anyone help me ?
by john.t
Tue Apr 04, 2017 7:14 pm
Forum: Python
Topic: i want my python code to auto adjust to screen resolution
Replies: 0
Views: 391

i want my python code to auto adjust to screen resolution

Hi
Is it possible to make a test pattern image using python code that can auto adjust to the resolution of your screen?I want that this picture will auto full screen in any screen resolution. does any body know how to do this?
thnx
by john.t
Mon Apr 03, 2017 7:03 pm
Forum: Raspbian
Topic: Run startup script only if no HDMI?
Replies: 4
Views: 1743

Re: Run startup script only if no HDMI?

Do i have to make my own tft.log to make this work?
thnx
john
by john.t
Sat Mar 25, 2017 1:10 pm
Forum: General discussion
Topic: How to switch from HDMI to Composite?
Replies: 17
Views: 9710

Re: How to switch from HDMI to Composite?

Hello
Is there a way to switch between composite video output and HDLMi while pi is running? in other words switching without rebooting pi
thnx
by john.t
Sat Mar 25, 2017 12:35 pm
Forum: General discussion
Topic: How to switch from HDMI to Composite?
Replies: 17
Views: 9710

Re: How to switch from HDMI to Composite?

The easiest way to switch to Composite video out is to disconnect the HDMI cable and reboot. If you installed using NOOBS, then there may be (as lafalken said) a line in config.txt that is forcing HDMI and that would need to be changed or commented out. There is a way to change outputs while runnin...
by john.t
Sun Mar 12, 2017 8:35 pm
Forum: Python
Topic: Switching Audio Output with a Button
Replies: 9
Views: 2618

Re: Switching Audio Output with a Button

Yes!!
it works :)!!! thank you very much.you have been much helpful..
by john.t
Sun Mar 12, 2017 7:35 pm
Forum: Python
Topic: Switching Audio Output with a Button
Replies: 9
Views: 2618

Re: Switching Audio Output with a Button

Do you have any idea what's wrong with the code? if i push the button it sends a signal set = 1 and directly after set = 0 everytime
by john.t
Sun Mar 12, 2017 6:48 pm
Forum: Python
Topic: Switching Audio Output with a Button
Replies: 9
Views: 2618

Re: Switching Audio Output with a Button

and i always get an error at False and set = 0 or 1. i have to make it False and start == 0 or 1
by john.t
Sun Mar 12, 2017 6:43 pm
Forum: Python
Topic: Switching Audio Output with a Button
Replies: 9
Views: 2618

Re: Switching Audio Output with a Button

hi rpdom

i tried your code but it does exact the same thing as before. :(
by john.t
Sun Mar 12, 2017 12:55 pm
Forum: Python
Topic: Switching Audio Output with a Button
Replies: 9
Views: 2618

Re: Switching Audio Output with a Button

Hello, thank you for posting this code. i tried it and it works.... but not 100%..if i push on the switch it switches from hdmi to analog output but when i push it again sometimes it switches to hdmi and sometime back to analog. ex . : button pushed1 = hdmi , push2=rca , push3=rca,push4=rca,push5=hd...
by john.t
Tue Feb 21, 2017 11:45 am
Forum: Graphics programming
Topic: Changing video resolution on the fly?
Replies: 17
Views: 70581

Re: Changing video resolution on the fly?

Yes, it is possible. tvservice -m CEA tvservice -m DMT will list the available HDMI modes. tvservice -e "GROUP MODE" will choose a specific resolution. Eg. for 720p60 tvservice -e "CEA 4" Powering on HDMI with explicit settings (CEA mode 4) tvservice -s state 0x12001a [HDMI CEA (4) RGB lim 16:9], 1...
by john.t
Tue Feb 07, 2017 8:50 pm
Forum: Graphics, sound and multimedia
Topic: HDMI VGA Cloned Displays
Replies: 1
Views: 654

Re: HDMI VGA Cloned Displays

any luck on this issue?
by john.t
Tue Feb 07, 2017 7:57 pm
Forum: General discussion
Topic: bcm_host.h: No such file
Replies: 11
Views: 8429

Re: bcm_host.h: No such file

Hi
This is maybe a stupid question but where do i copy this file?root?boot?

thank you
by john.t
Fri Feb 03, 2017 3:50 pm
Forum: Beginners
Topic: STICKY: Using a Gert VGA 666 adapter - [HOWTO]
Replies: 199
Views: 211355

Re: Using a cheap "Gert VGA 666" VGA adapter - [HOWTO]

If anyone using Gert's adapter would like to use both hdmi & vga simultaneously, I've found this to work ok: My relevant settings in config.sys enable_dpi_lcd=1 display_default_lcd=0 Open terminal (visible screen being hdmi, as display default for DPI is set to 0 above) wow thanks for this info! i ...
by john.t
Fri Feb 03, 2017 1:22 pm
Forum: Official Foundation Display
Topic: [How To] Auto detect hdmi while having dsi display connected
Replies: 35
Views: 30498

Re: [How To] Auto detect hdmi while having dsi display conne

Hi guys, the search is over. Here you will find an easy guide to autodetect hdmi on boot. After following this guide you can use displays connected to hdmi, while the dsi display is connected. If hdmi is connected on boot, it will use hdmi, otherwise it uses the integrated dsi display. I have been ...
by john.t
Fri Feb 03, 2017 11:07 am
Forum: Troubleshooting
Topic: Vga 666 dual display with HDMI
Replies: 10
Views: 4366

Re: Vga 666 dual display with HDMI

how can i tell omxplayer to play via hdmi? You can change which device omxplayer displays on using the --display N option, where N is usually 4 or 5 for the two display interfaces (HDMI/DSI or DPI/VGA) thank you for the reply. but i tried typing omxplayer --display 4 and afterwards also tried 5.but...
by john.t
Fri Feb 03, 2017 10:16 am
Forum: Troubleshooting
Topic: Vga 666 dual display with HDMI
Replies: 10
Views: 4366

Re: Vga 666 dual display with HDMI

https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=150629&p=989609&hilit=vga666#p989609 What you (currently) can't do is run desktop apps on both of them. The desktop only runs on one screen. Certain apps (omxplayer, kweb?) can be told to use the second screen. Hello how can i make omxplayer p...
by john.t
Thu Jan 26, 2017 8:49 pm
Forum: Troubleshooting
Topic: Vga 666 dual display with HDMI
Replies: 10
Views: 4366

Re: Vga 666 dual display with HDMI

https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=150629&p=989609&hilit=vga666#p989609 What you (currently) can't do is run desktop apps on both of them. The desktop only runs on one screen. Certain apps (omxplayer, kweb?) can be told to use the second screen. hello how can i tell omxplayer t...
by john.t
Wed Jan 25, 2017 11:58 am
Forum: Beginners
Topic: STICKY: Using a Gert VGA 666 adapter - [HOWTO]
Replies: 199
Views: 211355

Re: Using a cheap "Gert VGA 666" VGA adapter - [HOWTO]

PiGraham wrote:Any news on software / firmware to support dual display (HDMI + VGA)?
Im also having this problem. Have you able to solve it? i only can use vga not hdmi .
by john.t
Sun Jan 22, 2017 7:18 pm
Forum: General discussion
Topic: switch from VGA666 to HDMI?
Replies: 0
Views: 263

switch from VGA666 to HDMI?

hello dom i was wondering if you could help me with my problem. im making a test image generator for our company. an test image source that could be use using ang vga and hdmi output. ive heard about the vga666 and built one . it works fine.i tested it via vga at it works.but i would also like it to...
by john.t
Sun Jan 22, 2017 1:50 pm
Forum: Beginners
Topic: STICKY: Using a Gert VGA 666 adapter - [HOWTO]
Replies: 199
Views: 211355

Re: Using a Gert VGA 666 adapter - [HOWTO]

Thank you for the explaination. Its more clear to me now..i dont need the desktop actually i only need the rpi to load my test image that i already have..but not only vg but also via hdmi.in other words i switch between vga and hdmi to test a video hardware if his video output still works.. Ps i acc...
by john.t
Sun Jan 22, 2017 10:23 am
Forum: Beginners
Topic: STICKY: Using a Gert VGA 666 adapter - [HOWTO]
Replies: 199
Views: 211355

Re: Using a Gert VGA 666 adapter - [HOWTO]

I would also like a dual display via vga and hdmi. I have no idea, honest. I just gave the hardware to Dom and he did something in software. But then I just typed 'dual display' in the search box and apart from this entry another hit came up: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=...
by john.t
Sat Jan 21, 2017 11:11 am
Forum: Beginners
Topic: STICKY: Using a Gert VGA 666 adapter - [HOWTO]
Replies: 199
Views: 211355

Re: Using a Gert VGA 666 adapter - [HOWTO]

Wikipedia to the rescue (Yes, I am too lazy to calculate it myself). The R–2R ladder operates as a string of current dividers, whose output accuracy is solely dependent on how well each resistor is matched to the others. Small inaccuracies in the MSB resistors can entirely overwhelm the contributio...
by john.t
Sat Jan 21, 2017 11:10 am
Forum: Beginners
Topic: STICKY: Using a Gert VGA 666 adapter - [HOWTO]
Replies: 199
Views: 211355

Re: Using a Gert VGA 666 adapter - [HOWTO]

Hello,

i have been able to make my own vga666, and tested it and worked fine for my vga output. But i would also like a dual display via vga and hdmi. Ive heard that its possible. How do i do this?
thank you very much.

john

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