How to generate OSD with ccs?

Analyzer · Joined: 07 Sep 2003 Posts: 32

Hi there,

I would like to generate OSD for TV like this project :

http://www.riccibitti.com/dvm.htm

but i'm not talented in assembly, i want to use only pic and i need ccs c source or similar projects in c.Any ideas?

Analyzer.

dyeatman · Joined: 06 Sep 2003 Posts: 1912 Location: Norman, OK

The project you envision, OSD without using video sync hardware is extremely complex and is likely much more than you are prepared for!! I feel sure it is way beyond anything we are prepared to coach you through here.

The last time I did it in software it took me almost 6 months and a LOT of code and test equipment (dual trace scope etc.) to make it work. Even so it was pretty limited due to speed limitations of the PIC chip. At the least you need to use a 40MHZ chip to be able to generate a decent H and V sync train.

If you are not well experienced in coding or working with video you may want to go the hardware route using an OSD chip. Circuit Cellar magazine has published several of these.

Dave

Analyzer · Joined: 07 Sep 2003 Posts: 32

Hmm, I can understand.So is there an osd chip can easily find? And Is there any similar projects with ccs?
Thanks in advance.

Analyzer

wedilo · Joined: 16 Sep 2003 Posts: 71 Location: Moers, Germany

Hello Analyzer,

I think a good choice is the STV5730 from STM.
I don't used this chip, but the schematics etc. looks very easily.
Please have a look to Don Lancaster's webside. There was a 'tech musing' some year ago.

73 Sven

Guest · Posted: Tue Dec 09, 2003 12:29 am

I am currently involved in such a project, using STV5730A and a PIC452 in c language.

I recently published some code on this forum, that might interest you. The best place to start is going through the two main docs from ST-Thomson (Datasheet & Eval Guide).

Are you interested in analogue and Digital video OSD on the final output?

Analyzer · Joined: 07 Sep 2003 Posts: 32

Dear Guest,

I'm very interest at this project and i will be very appreciated if you can share your opinions with me please.I'm searching availability for my country.I will purchase some sample osd chips from maxim-ic, max4455. Would you contact me with e-mail or this board please? Ireally need help.
My e-mail is optizyme@hotmail.com

Analyzer.

Guest · Posted: Sat Apr 17, 2004 7:51 am

look -- > http://break.org/gisle/Pic/stv5730/