Re: [Gumstix-users] NTSC video recording

[Alexandre P. N. <al...@om...>]

Chad Lathe escreveu:

>I just got my hot little hands on an old pinhole camera for a project  
>I am working on, and was wondering if there were any way to interface  
>that with the gumstix to capture frames every so often, and storing  
>them to a CF card? I haven't had any luck googling it, just thought I  
>would throw that out here on the listerv.
>
>-Chad Lathe
>  
>

There's an interesting ic from philips (err... I think philips sold it's 
semiconductors division), it has an analog input, and a 4-bit digital 
bus output plus i2c control and other stuff. IIRC, it supports NTSC, PAL 
(w/ some variants) and SECAM.

IIRC it decodes in 8 or 10 bits, but the bus was 4 bits. That's 
interesting because you can either try to read from it with 4 GPIOs or 
use a parallel-to-serial chip (not sure about the naming, but it exists, 
it gets parallel data and serializes it through a data pin, it also 
outputs a clock), which one could use into a SSP port and let the 
hardware do the receiving/buffering/interrupting all by itself.

It's a little complex but it may work.

- Alexandre

P.S..: I can't remember the device's part number, but I can google for 
it later.