sky59
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Original 7inch display with touchscreen setting

Mon Feb 17, 2020 2:07 pm

Hi all,

I have an easy question, at this moment I wait for my RPi4 and original touchscreen 7inch display so I would like to peel the onion as what I can expect when it comes....

It is the display which has its own PCB connected then with "tape" cable to the RPi special connector

Is touchscreen function and display picture already enabled by default in Raspbian? (I use actual latest one)

If yes, is it already set up for resolution 800x480?

If not, what must I do to make it work? I tried to find this info on this forum but I probably am not competent enough :)

thnx!

DirkS
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Re: Original 7inch display with touchscreen setting

Mon Feb 17, 2020 4:49 pm

What 'original touchscreen'? Do you mean the 7" touchscreen made by RPF/RPT?


sky59
Posts: 36
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 8:07 pm

Thanx for link! I wait for exactly this LCD

Does the latest rasbian support for it already?
Or i have to install as on link?

gordon77
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 8:21 pm

I believe it will be supported without the install.

DarkElvenAngel
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 8:48 pm

The official touchscreen is plug and play.

You don't need to do anything other than hook it up.

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DougieLawson
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 9:14 pm

DarkElvenAngel wrote:
Tue Feb 18, 2020 8:48 pm
The official touchscreen is plug and play.

You don't need to do anything other than hook it up.
Wrong. If you plug it in on a powered up RPi you are likely to end up with a bill for £90+ of new equipment. £35 for the new RPi and £55+ for the new screen.
Criticising any questions is banned on this forum.

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DarkElvenAngel
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 10:45 pm

DougieLawson wrote:
Tue Feb 18, 2020 9:14 pm
DarkElvenAngel wrote:
Tue Feb 18, 2020 8:48 pm
The official touchscreen is plug and play.

You don't need to do anything other than hook it up.
Wrong. If you plug it in on a powered up RPi you are likely to end up with a bill for £90+ of new equipment. £35 for the new RPi and £55+ for the new screen.
Really!? I've never had a problem with mine that's all I did plugged it in and turn it on. Can you elaborate on what is wrong with that statement?

I'm honestly not sure if I've done something wrong I don't want to give bad advice.

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DougieLawson
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 11:41 pm

"Plug 'n' play" means you can connect a device while the host is powered on (think USB).

Plugging anything into a Raspberry with the power on is a risk, USB is less risk. But it it not "plug 'n' play" (using the modern definition).

You MUST power off, connect the device, then power on.
Criticising any questions is banned on this forum.

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DarkElvenAngel
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Re: Original 7inch display with touchscreen setting

Tue Feb 18, 2020 11:57 pm

DougieLawson wrote: "Plug 'n' play" means you can connect a device while the host is powered on (think USB).

Plugging anything into a Raspberry with the power on is a risk, USB is less risk. But it it not "plug 'n' play" (using the modern definition).

You MUST power off, connect the device, then power on.
I'm an old hardware guy when plug and play was invented. It was for sound cards and the like you would of course have the power off. I was not aware the definition had changed. But as this is a forum where a novice user could take it as with the power on.

I consider USB devices to be Hot Pluggable or Hot Swappable so with that the screen is cold pluggable only.

The software is already setup for the screen and will work out of the box.

By the way I just looked up plug and play at no point does it mention in the specification power status.

https://en.m.wikipedia.org/wiki/Plug_and_play

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rpdom
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Re: Original 7inch display with touchscreen setting

Wed Feb 19, 2020 7:44 am

DarkElvenAngel wrote:
Tue Feb 18, 2020 11:57 pm
I consider USB devices to be Hot Pluggable or Hot Swappable so with that the screen is cold pluggable only.
I agree.

Plug and Play used to be, as you said, for things like sound cards where you could power off your PC, put the card in, power it back up, load some drivers (in most cases) and start using it.

That was instead of setting switches on the board, making sure the settings didn't clash with any other board, sometimes doing settings in BIOS and the config/startup files etc.

Yep, USB is (supposed to be) Hot-Pluggable, as are some SATA and other devices.
Unreadable squiggle

drushtx
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Re: Original 7inch display with touchscreen setting

Wed Feb 19, 2020 10:23 pm

Hot swappable is the term applied to devices that can safely connect or disconnect to a host while power is applied. Plug and play is the term that describes a host's ability to detect and support/use (load drivers, load default configuration, etc.) a device without being hard or soft booted. The two terms are not interchangeable.

sky59
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Re: Original 7inch display with touchscreen setting

Thu Feb 20, 2020 10:41 am

Thank you all!

So it arrived today and I want to try it. I have latest Raspbian with latest upgrades. So I hope it will be "cold Plug-and-Play" :shock:

I believe then, also 800x480 pixels is somewhere pre-set already?

I just found somewhere I can make picture and touch upside down with editing config.txt , true?

just last info for to be absolutely sure: LCD is from www.okdo.com - is this the only official manufacturer?

fruitoftheloom
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Re: Original 7inch display with touchscreen setting

Thu Feb 20, 2020 11:05 am

sky59 wrote:
Thu Feb 20, 2020 10:41 am
Thank you all!

So it arrived today and I want to try it. I have latest Raspbian with latest upgrades. So I hope it will be "cold Plug-and-Play" :shock:

I believe then, also 800x480 pixels is somewhere pre-set already?

I just found somewhere I can make picture and touch upside down with editing config.txt , true?

just last info for to be absolutely sure: LCD is from www.okdo.com - is this the only official manufacturer?

Okdo are a Reseller, for a list of other Resellers click on the "Buy Now" on the product page:

https://www.raspberrypi.org/products/ra ... h-display/
Thinking outside the box is better than burying your head in the sand...

gordon77
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Re: Original 7inch display with touchscreen setting

Thu Feb 20, 2020 11:43 am

sky59 wrote:
Thu Feb 20, 2020 10:41 am
Thank you all!

So it arrived today and I want to try it. I have latest Raspbian with latest upgrades. So I hope it will be "cold Plug-and-Play" :shock:

I believe then, also 800x480 pixels is somewhere pre-set already?

I just found somewhere I can make picture and touch upside down with editing config.txt , true?

just last info for to be absolutely sure: LCD is from www.okdo.com - is this the only official manufacturer?
yes it will work at 800x480 no setting up..

from the link i posted...

In Terminal, type "sudo nano /boot/config.txt"
Add the line "lcd_rotate=2" to the top of the file.
Press CTRL+X
Then Y
Then Enter.
And reboot!

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