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Thread: TV Term Setup ?

  1. #1

    Default TV Term Setup ?

    Could someone look at my photo, I'm trying to
    get the RCA TV feature working and it's not

    Here's my layout. Pins 12,13 & 14
    are going to the 1.1k, 560ohm &270

    I'm not using p15

    My sony TV is set to Video 1

    Is it ok ?

    -Areal

    Post Edited (Areal Person) : 12/8/2006 2:26:25 AM GMT
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    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  2. #2

    Default

    Where's your crystal?


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    Mike
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  3. #3

    Default

    Mike,

    Good call.....I've been following this progression in a different thread.....and didn't even think about the Crystal.



    James L
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  4. #4

    Default

    Ok, I have installed the Crystal.

    I tryed again, but it still will not work.

    Is the Crystal required for VGA & TV Term ?

    I thought is was only needed for serial communications ?

    -Areal
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  5. #5

    Default

    I believe it is required, never tried it with out one. Here's a link to the one I use, Parallax also sells crystal's

    http://www.mouser.com/search/refine....=520-HCU500-20

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    Mike
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  6. #6

    Default

    The crystal is required any time the chip is going to run.....it is required.



    James L
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  7. #7

    Default

    I would also connect pins 32 VDD (+3.3), and pin 29 VSS (Ground)

    Also make sure you have defined the PINsfor tv_text, below is an example from one of my *.spin programs:
    Code:
    OBJ
      term          : "tv_text"                             ' Define NTSC TV output routine
     
     
    PUB main 
      term.start(12)                                        ' start TV terminal on pins 12 to 15

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    Mike

    Post Edited (Mike Cook) : 12/8/2006 2:57:27 AM GMT
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  8. #8

    Default

    Ok, I did all that you suggested, I connected pins 32 VDD (+3.3), and pin 29 VSS (Ground)
    I installed the Crystal, and double checked everything.

    it still will not work.

    I'm using the example program thats provided with
    the propeller tool download, it's called TV_TEXT_DEMO.SPIN
    and it looks like this.

    ----------------------
    CON

    _clkmode = xtal1 + pll16x
    _xinfreq = 5_000_000


    OBJ

    text : "tv_text"


    PUB start | i

    'start term
    text.start(12)
    text.str(string(13," TV Text Demo...",13,13,$C,5," OBJ and VAR require only 2.8KB ",$C,1))
    repeat 14
    text.out(" ")
    repeat i from $0E to $FF
    text.out(i)
    text.str(string($C,6," Uses internal ROM font ",$C,2))
    repeat
    text.str(string($A,16,$B,12))
    text.hex(i++, 8)
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  9. #9

    Default

    In the Propeller Tool, go to File>Archive>Project+Propeller Tool. Attach that file and I'll run it on my demo board.

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    Mike
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  10. #10

    Default

    Ok, here is the file.
    Attached Files Attached Files
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  11. #11

    Default

    Well that works on my board, so..

    1. Did you purhase your crystal from Parallax or somewhere else it should be a 5.0 MHZ 20pF

    2. Might be a bad chip

    I'm assuming when you say: "it still will not work." means the Propeller Tool will Identify the chip and then download the program when you press F10, but your not getting any vidio output.

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    Mike
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  12. #12

    Default

    Yes, your correct. I did get the crystal from Parallax.

    The Propeller Tool will Identify the chip and then download the program when I press F10, but I'm not getting any vidio output.

    If you think my wiring is ok based on what you saw, and all, then I guess
    it must be a bad chip.

    I have another oprdered, it should be in next week. I'll try that.

    I really want to thank you and everyone else who has helped me.
    It's been frustrating because, I'm new to electronics, and well, I guess I must
    have done somthing to damage the chip.

    Thanks again !
    -Areal
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  13. #13

    Default

    Nothing else jumps out at me from your picure, only thing else to try is to shorten some of your wiring on the three resistors and make sure the video display you are using will display a composite video signal.

    <EDIT>

    Here's a LONG shot...

    If your resistors were shipped with tape on both ends, trim .25" off of each end. The stickey stuff on the 'tape and real' packaging can sometimes cause you problems.

    </EDIT>

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    Mike

    Post Edited (Mike Cook) : 12/8/2006 3:44:22 AM GMT
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  14. #14

    Default

    How did you plug the crystal in? If you used wires then try hooking it straight into the breadboard by propeller pins. (Make sure you are using pins 30 and 31 for the crystal).

    I had a problem with video, took about 10 minutes before I figured out that the crystal wasn't oscillating.

    Harrison
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  15. #15

    Default

    Areal,

    I do have one ohter suggestion.....although I doubt it works. Place a .1uF capacitor between VDD and VSS right at the Propeller. There maybe a little noise that is causing problems. I doubt it.....the way you have it setup....I don't see how.....but we might as well cover all the bases.

    James L
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  16. #16

    Default

    What about the EEprom????

    I don't see it on the board......



    Areal....so you have an eeprom on the board?

    If not...it is needed. The prop loads it's software from the eeprom....I don't know if you can run one without it.



    James L
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  17. #17

    Default

    EEPROM is only needed if you want to 'boot up' with out having to load the program with the Propeller Tool, F10 downloads the program directly to the Propeller's RAM.

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    Mike
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  18. #18

    Default

    I don't really know.....since I never run the Propeller that way.....just a thought.

    EDITED::::

    No the EEprom is not needed....so you are right Mike.....sorry Areal....my mistake.

    James L

    Post Edited (James Long) : 12/8/2006 4:03:37 AM GMT
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  19. #19

    Default

    Sob... sob...

    I've been working on this around the clock for 3 days.

    I've tryed 5-6 completly different setups, breadboard, soldered pref board.
    Different resistor sets, different monitors, cables. ua...

    everything, except changing the Propeller chip, I'm going to try that
    soon as it arives in the mail, I'm also going to try the .1uf cap between VDD and VSS
    as james suguested.

    I think it just has to be the chip, it simply cant be this hard to hook this stuff
    up ? I dont know how the chip got damaged.

    I'm really scared that when I try a different propeller chip that it will not work.
    But that simply cannot be possiable, I know that, I'm trying to tell myself that
    so I don't get depressed.

    The wiring diagram is just to simple for this not to work.

    Thanks so very very much to everyone,
    This is a really cool forum !

    -Areal
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

  20. #20

    Default

    Areal,

    I'm sorry it is being so frustrating......I have that happen at time....but you will feel much better when you prevail.

    Just keep trying new things....something will work.

    Sorry we couldn't find the problem.......maybe the new chip will be the fix.

    James L
    Last edited by ForumTools; 09-30-2010 at 01:24 AM. Reason: Forum Migration

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