Propeller Backpack - No NTSC Video Output - text works

micromuc

I'm trying to overlay text on top of incoming video. I am getting the numbers on the screen from my program but the video signal is not making it to the output. Jumpers VID and OVL are installed. I've attached pictures of a few different test points on the board. Pictures are labeled, Video Input, Video Output, Prop pin A22, Prop pin A19, Prop pin A11. Hopefully someone can help because I'm out of ideas. Thanks...Mark


The Code that works at putting numbers on the screen:

pause 50
    TextOut = 0     'Reset the Propeller Backpack
    pause 500
    TextOut = 1
    pause 2000      'Wait for it to come out of reset             
    counter = 1

main
    SEROUT2 TextOut,84 + 32768,[dec counter,$01]    '9600 open-drain, $01=move to current screen home position  
    pause 1000
    counter = counter + 1
    if counter = 1000 then counter = 1
goto main

Phil Pilgrim (PhiPi)

Which Spin program are you using on the Backpack? Can you post the source?

-Phil

micromuc

Hi Phil, thanks for responding. I'm not sure what version program. It has the original that would have shipped with it. It's been sitting on a shelf for a few years and now I have a need for it. I don't know how to load software on it but I'm willing to learn. I don't use the propeller

Phil Pilgrim (PhiPi)

The program shipping with the Backpack did not do overlays -- just output. I'll see if I can find the necessary files to do the overlay. Please be patient: it might take awhile.

-Phil

micromuc

oh gosh, I spent a few hours trying to get this to work. I'm glad you posted here or I would have spent a few more. I have a prop plug rev b so I guess I have all the hardware needed to load the source. thanks again for helping out

Ltech

This ?

Ltech

And user font demo

micromuc

thanks Ltech, I was able to get things working. I'm attaching the files that got me through it just in case someone needs them in the future. Along with Ltech post I found this link www.solarbotics.com/product/21435/. I used the latest Propeller Tool version and a Prop Plug to upload the prop_backpack_overlay_terminal.binary to the Propeller Backpack. The attached PDF explained the rest

Phil Pilgrim (PhiPi)

Glad you got it working! 'Sorry I couldn't get back to you sooner.

-Phil