Comment by Francesco Ferrara on March 16, 2010 at 3:32am

tvpal generate a TV Signal (full with VSYNC and HSYNC).
baroneosd overlay text over a PAL signal.

Comment by Rana on March 16, 2010 at 3:43am

Would it not affect the performance of stabilization / navigation by ATMega328 of Ardupilot ?

Comment by Francesco Ferrara on March 16, 2010 at 3:51am

There are some work on the code to integrate it in ardupilot, but I think that is possible.
This program is interrupt driven, and with only 1 line to draw (8 pixel) I think 64us per line, 1ms per frame (50hz) 1/20 of the time consumed to draw.

Comment by Rana on March 16, 2010 at 4:05am

As a standalone osd based on ATMega328, I suggest you a perfect suggestion and that is base on Openlog hardware. It's a small module based on ATMega328. While Openlog receiving data on uart, can handle this task happily.
OpenLog can be easy connected in parallel to X-Bee and work hapily

Comment by Rana on March 16, 2010 at 4:34am

Here is the lates HEX file, firmware modified by me to support bauds 2400, 4800, 9600, 19200, 28800, 38400, 57600, 76800 & 115200. OpenLog.hex

Comment by Francesco Ferrara on March 16, 2010 at 5:27am

Did you mean this ?

Comment by Francesco Ferrara on March 16, 2010 at 5:27am

http://www.sparkfun.com/commerce/product_info.php?products_id=9530

Comment by Tim McMahan on March 16, 2010 at 5:32am

Here is a standalone unit based on AVR, perhaps some of the info there would helpful in this? Its based on NTSC. The same guy has a HAM radio telemetry system as well.



Tim

Comment by Rana on March 16, 2010 at 6:48am

Yes, F. Ferrera, thats right !
http://www.sparkfun.com/commerce/product_info.php?products_id=9530

Comment by Francesco Ferrara on March 16, 2010 at 8:16am

To use the analog comparator, PD6 PD7 (AIN0 AIN1) are needed, but are not avaiable on this implementation sorry.

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