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Thread: TV_Text -> PPDB

  1. #1

    Default TV_Text -> PPDB

    I assume that the TV_Text.spin object is ready to go for the DEMO board, since I do not have a DEMO board but a PPDB, I am trying to figure out what wires go to what pins. The first thing that I tried was p12-Vo, p13-V1, p14-V2, and p15-VA, this got me nowhere. Anybody get the TV_Text working with the PPDB, and is willing to share the secret?


    <edit> @jazzed, I tried the tv_text.c, and tv_test.c, when I compile I get the following:
    tv_text.c, error, _main not defined
    tv_test.c, error, _tvText_start symbol not defined
    So, I did not even get to the point of trying to change your program to match the pins to what I have hooked up. <edit>

    Thanks

    Ray

    Post Edited (Rsadeika) : 9/20/2008 9:38:51 PM GMT
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  2. #2

    Default

    Sure! Got one in front of me!

    Try this:

    Propeller P12 to V0
    Propeller P13 to V1
    Propeller P14 to V2

    OBC

    Edit: Make sure that you are looking at the correct pin for P12, it can be a little
    tricky to see it right. If you are not sure, count'em out from P0


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    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  3. #3

    Default

    Just to make sure I got it right with my TV set, I have three holes on the front, yellow, white, and red. I just plug into the yellow hole, which reads video, correct? I have not worked with kind of set-up, just been plugging into VGA ports.

    Thanks
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  4. #4

    Default

    Yep, the yellow one is video.

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    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  5. #5

    Default

    I had no success with the TV, maybe the VGA. Does anybody have the pinout for the VGA adaptor for the PPDB, so I can try VGA_Text object. It would be nice if Parallax would have included the pinouts for the PPDB, so you could run the provided objects.

    Thanks

    Ray
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  6. #6

    Default

    Hi Ray, if you prefer to work with VGA, VGA_Text and TV_Text are nearly symmetric drivers, meaning frequently all that needs to be done is replace one object with another, and make sure you have the right pin pointed to in the start method.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  7. #7

    Default

    Here's the VGA hookup.. (Paul, you guys never did answer my question about why on this.)

    V = P16
    H = P17
    B1 {240ohm} = P19
    B0 {470ohm} = P18
    G1 {240ohm} = P21
    G0 {470ohm} = P20
    R1 {240ohm} = P23
    R0 {470ohm} = P22

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    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
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    Got an SD card connected? - PropDOS
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  8. #8

    Default

    Ray,

    You said that you hadn't played with this setup before. Is there a chance you didn't find the
    "line in" channel on your TV? That channel is typically located below channel 1 or has it's own
    button on your remote or TV. Sometime referred to as "input"

    Don't give up! TV access with the Propeller is pretty cool.

    OBC

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    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  9. #9

    Default

    I am working with a KONKA TV, it has two sets of these plug-ins, one on the back, which I have my DVD player pluged into, and the other set on the front of the TV,which I have connected to the PPDB. On my remote control I have to select AV1, to have the DVD work,or AV2 for the PPDB. Maybe my TV AV2 is bad, but I have no idea as to how to test that. I sure as heck am not going to buy another TV just to see how my PPDB works.

    As for the VGA connector, are you saying that I need to place a resistor between B1 and P19, for example. That is a real pain, you think that they would have added that to the board itself.

    B1 {240ohm} = P19
    B0 {470ohm} = P18
    G1 {240ohm} = P21
    G0 {470ohm} = P20
    R1 {240ohm} = P23
    R0 {470ohm} = P22

    Thanks again

    Ray
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  10. #10

    Default

    Ray,

    Those resistors are there. I grabbed a quick cut/paste from an earlier message as to
    why they are laid out in the order they are. Notice how the lines criss-cross? :)

    Just make the wire connections and you'll have VGA. Don't forget to load the VGA_Demo.

    As for troubleshooting the TV, if the DVD player works on the rear hookup, try moving
    it to the front jacks while it's on and see if you can make it work there. Or hook your
    PPDB to the rear jacks and see it work. :)

    OBC

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    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  11. #11

    Default

    Also, what are you running for the TV out?

    If it were me, I would use the Parallax graphics demo. It's a good signal, simple to run, and known to display on pretty much everything. Could be your TV is picky.

    This is where a quick photo would help too. (book suggestion OldBit! Lots of close up photos.)

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    Propeller Wiki: Share the coolness!

    Chat in real time with other Propellerheads on IRC #propeller @ freenode.net
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  12. #12

    Default

    I just checked both of the video ports on the TV, using OBCs suggestion, and they work. I tried a different cable, just to make sure that it was not the cable, both cables work. I also tried the TV_graphics demo, that did not work. So, there must be something going on with the PPDB itself, I hope nobody suggests using a scope on the TV module connections on the PPDB, don't have one, and if I did I would not know how to use the thing anyway. Any easy way to check the TV module on the PPDB?

    Ray
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  13. #13

    Default

    Oldbitcollector said...
    Here's the VGA hookup.. (Paul, you guys never did answer my question about why on this.)
    I don't have an answer to your question, I'll have to ask Chris on Monday.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  14. #14

    Default

    @Paul, It's a little nit-picky, but I am really curious if there was a design consideration,
    or if I finally caught someone sleeping. (doubtful) :) :)

    OBC

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    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  15. #15

    Default

    The original design for the PPDB dates back to before the introduction of the Propeller, it is possible it was laid out before there was any concept of a standard and was never updated during the design process.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.

    Post Edited (Paul Baker (Parallax)) : 9/20/2008 9:33:46 PM GMT
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  16. #16

    Default

    Well, I just tried the VGA_Text.spin object, and that did not work. I am having a heck of a time trying to get either one of these objects to work, I am starting to think that I may just have a bum board. I guess my next qustion is, has anybody got the VGA module to work on there PPDB? Their is probably no easy way to check the components on the board, so if tomorowboard does not work, then bye bye PPDB.
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  17. #17

    Default

    I'll try it on Monday.

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    Paul Baker
    Propeller Applications Engineer

    Parallax, Inc.
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  18. #18

    Default

    I presume that you have the grounds connected OK ?
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  19. #19

    Default

    I was able to run the VGA demo (the one with the button blocks) using the wiring scheme above.

    @Ray, It's almost starting to sound like you might have a bum chip. Can you do a simple LED
    blink? I've attached one below. Use a single wire from P0 to LED 0 and see if it works, then
    work your way from P0 to P29 and see if it works. Just change the code and move the wire each time.

    This will confirm your chip is working correctly.

    OBC

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
    Attached Files Attached Files
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

  20. #20

    Default

    Another thought, (and something that I will include in my book)

    Make sure that your wires are in good shape. Frequent bending of solid core wire can
    cause it to break, losing connection. You could have a wire that is broken, yet the
    insulation is holding it together. Pass them with a meter or use the blink code to double
    check any in doubt.

    OBC

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
    Last edited by ForumTools; 09-30-2010 at 10:19 PM. Reason: Forum Migration

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