John_R
Posts: 3
Joined: Mon Jun 10, 2013 12:16 pm

Using P1 to input DVB-T parallel transport stream

Mon Jun 10, 2013 12:24 pm

Hi

Has anyone interfaced an actual DVB tuner direct to the P1 GPIO port ? instead of USB

I have a DVB tuner here with a direct transport stream interface (8 data bits plus clock,start and valid signal) and i want to make a small board to plug into P1. I2C is also needed for control, as is a GPIO output for reset and i would like to use one pin for an IR input for a remote control.

At a push I can strobe in the data, so that would be 8 bits plus strobe.

Seems everyone has used a DVB-T type USB stick for this so I am unsure if that has been done due to lack of availability of actual real tuner/demodulator systems, due to just pure convenience or due to the fact that the GPIO port cannot accept a proper TS signal.

Any help appreciated

John

Snocturnal
Posts: 1
Joined: Thu Aug 15, 2013 8:33 am

Re: Using P1 to input DVB-T parallel transport stream

Thu Aug 15, 2013 8:35 am

Hello
I'm attempting to do your own thing
I too am a DVB-T tuner I can already tune from I2C and seem to have a Transport Stream output in parallel.

I am trying myself to figure out if I can directly connect the TS to GPIO of raspberry in order to analyze the flow of transport stream.

So far I found only one Application Note of Cypress CY7C68013A who manages to convert USB Transport Stream and through a developed by Cypress driver you should be able to analyse the Transport Stream.

the application note found at this address: http://www.cypress.com/?rID=39714

You are come to some solution?

Excuse my English, I'm Italian and I'm using a translator :D

John_R
Posts: 3
Joined: Mon Jun 10, 2013 12:16 pm

Re: Using P1 to input DVB-T parallel transport stream

Thu Aug 15, 2013 9:06 am

Sorry, I found nothing about using the IO port for transport stream input

Looks like no-one has ever considered feeding fast parallel data to the PI

The Transport stream can also go in as strobe data OR serial (max clock frequency 36.57MHz) but I could not find any of the IO I could use 4 wires on that would accept that data rate either.

I would be more than happy to make a "plug-on" DVB-T card but I cannot do that if the hardware cannot support it.

John

kevin_t
Posts: 1
Joined: Tue Apr 08, 2014 9:21 am

Re: Using P1 to input DVB-T parallel transport stream

Tue Apr 08, 2014 9:52 am

Hi John,
Did you find how to plug the transport stream interface in the P1 GPIO?
I found nothing on the web and I would like to know if it's possible.
Kévin

John_R
Posts: 3
Joined: Mon Jun 10, 2013 12:16 pm

Re: Using P1 to input DVB-T parallel transport stream

Tue Apr 08, 2014 3:40 pm

Kevin

Sorry, the project was abandoned, mo easy way to do it

It is a shame as I have LOTS of Single chip DVB-T tuner/demod IC's looking for a home, would have made a very cheap add on (about same price or less than USB and free up a USB port)



John

EBdJoselu
Posts: 1
Joined: Thu Apr 18, 2019 5:06 pm

Re: Using P1 to input DVB-T parallel transport stream

Thu Apr 18, 2019 5:11 pm

That's a good idea.
Here in 2019 I am researching about ts stream and GPIO...

User avatar
rpdom
Posts: 14483
Joined: Sun May 06, 2012 5:17 am
Location: Chelmsford, Essex, UK

Re: Using P1 to input DVB-T parallel transport stream

Fri Apr 19, 2019 7:15 am

EBdJoselu wrote:
Thu Apr 18, 2019 5:11 pm
That's a good idea.
Here in 2019 I am researching about ts stream and GPIO...
Have you heard of the official Pi DVB-T tuner uHAT? It won't work with a Pi 1, but should work with any other the other models. It uses SPI to transfer the data. The drivers provide a standard interface so you can use it with TV Headend and similar.

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