Page 1 of 3 123 LastLast
Results 1 to 20 of 44

Thread: abs jtagging issues

  1. #1
    Junior Member
    Join Date
    Feb 2008
    Posts
    220
    Thanks
    3
    Thanked 14 Times in 14 Posts
    Rep Power
    204
    Reputation
    64

    Default abs jtagging issues

    Hey folks,

    I managed to solder on the 20 pins to the 8776 board, connected everything up and jkeys tells me that it is an 'unknown device'. The box still powers up ok and the solder job is fine.

    Here is a pic of my current setup:
    Code:
    http://img142.imageshack.us/img142/2465/18092009048j.jpg
    Wired up as per the diagram:
    Code:
    http://img16.imageshack.us/img16/4343/jtag.jpg
    I'm using solderless jtag connectors going from the jtag pins on the board to the 20 pin ide cable. Also using a 'wiggler' jtag interface (that a mate lent me who got it off ebay). I have also tried with and without the lpt extension cable - both yield the exact same results.

    Jkeys is using the right def files, preferences set correctly and have tried power cycling the box then clicking 'detect'.

    Any ideas here? I'm completely stumpted at the moment!

    Cheers,
    keegs



Look Here ->
  • #2
    Senior Member tagg's Avatar
    Join Date
    Jan 2008
    Location
    In a Tin Can
    Posts
    2,203
    Thanks
    872
    Thanked 378 Times in 221 Posts
    Rep Power
    308
    Reputation
    1897

    Default

    20 pins ??? all you need is 5 and a ground mate, recheck what you have done, and i think your wires may be too long as well

    Tagg

  • #3
    Member davo's Avatar
    Join Date
    Jan 2008
    Location
    In A House
    Age
    55
    Posts
    464
    Thanks
    32
    Thanked 202 Times in 103 Posts
    Rep Power
    231
    Reputation
    921

    Default

    I think a wise man here said no more than 10cm wires is best.

  • #4
    Junior Member
    Join Date
    Feb 2008
    Posts
    220
    Thanks
    3
    Thanked 14 Times in 14 Posts
    Rep Power
    204
    Reputation
    64

    Default

    Thanks tagg. Obviously I need TMS, TCK, TDI, TRST and TDO, but which ground pin do I use? Does it matter?

    Also is the jtag interface ok?

    Cheers,
    keegs

  • #5
    Premium Member
    Join Date
    Jan 2008
    Location
    Melbourne
    Posts
    854
    Thanks
    246
    Thanked 87 Times in 69 Posts
    Rep Power
    243
    Reputation
    886

    Default

    Quote Originally Posted by keegs View Post
    ... but which ground pin do I use? Does it matter?
    Any down the left-hand-side,.. or elsewhere if more convenient,..

  • #6
    Senior Member tagg's Avatar
    Join Date
    Jan 2008
    Location
    In a Tin Can
    Posts
    2,203
    Thanks
    872
    Thanked 378 Times in 221 Posts
    Rep Power
    308
    Reputation
    1897

    Default

    As jimbo123 said anyone should be fine

    Tagg

  • #7
    Senior Member
    fandtm666's Avatar
    Join Date
    Jan 2008
    Posts
    5,502
    Thanks
    244
    Thanked 990 Times in 465 Posts
    Rep Power
    1189
    Reputation
    40447

    Default

    get a leg of a resistor and solder it across every ground pin also make sure you have connected the +v to the 3.3 on the board

    make sure the wires are no longer than 10cm
    Last edited by fandtm666; 18-09-09 at 08:15 PM.
    dont say linux if i wanted it id install it

  • #8
    Senior Member
    best4less's Avatar
    Join Date
    Jan 2008
    Location
    Australia
    Posts
    7,684
    Thanks
    3,487
    Thanked 2,207 Times in 1,132 Posts
    Rep Power
    757
    Reputation
    15165

    Default

    A reboot of the computer got me out of trouble one night
    When you do things right, people won't be sure that you have done anything at all

  • #9
    Junior Member
    Join Date
    Feb 2008
    Posts
    220
    Thanks
    3
    Thanked 14 Times in 14 Posts
    Rep Power
    204
    Reputation
    64

    Default

    Quote Originally Posted by diavalo13666 View Post
    ...make sure you have connected the +v to the 3.3 on the board
    VCC hey...My Jtag interface apparently powers itself up from the pc. Do I still need this? If so it might be what i was overlooking as well as the cable length.

  • #10
    Premium Member
    Join Date
    Jan 2008
    Age
    41
    Posts
    104
    Thanks
    6
    Thanked 3 Times in 2 Posts
    Rep Power
    202
    Reputation
    55

    Default

    What brand of tsop are they thosiba 58FVB160AFT-70 if so i have modified the .def file to suit these chips.

  • #11
    Member AceR's Avatar
    Join Date
    Jan 2008
    Posts
    268
    Thanks
    4
    Thanked 49 Times in 26 Posts
    Rep Power
    211
    Reputation
    271

    Default

    What a mess, look at all those wires going into the board. Piss that ebay piece of junk off , go down to jaycar or whoever and build a basic jtag that has about seven wires to connect and then connect that to your printer port. They are very simple to construct, cost about 5 bucks and take about 20 minutes to make. Heaps of members here have made the same jtag and had zero problems with them. Also make sure you jumper JB12 on the board.
    Member since March 2002 and still in the Blue

  • #12
    Member AceR's Avatar
    Join Date
    Jan 2008
    Posts
    268
    Thanks
    4
    Thanked 49 Times in 26 Posts
    Rep Power
    211
    Reputation
    271

    Default

    Also another thing. my cable length from my printer port to my jtag is about a meter long. My wires from my jtag to the abs board are about 30 cm long, so i don't know what this "10"cm thing is about. In fact most times I read about this subject the wire lengths seem to just get shorter and shorter.. Next someone will say they have to be 5cm long....
    Member since March 2002 and still in the Blue

  • #13
    Senior Member gw1's Avatar
    Join Date
    Jan 2008
    Location
    Hobart
    Posts
    957
    Thanks
    49
    Thanked 608 Times in 213 Posts
    Rep Power
    267
    Reputation
    1901

    Default

    If your cable is long it may work depending on the characteristics of the parallel port line driver on your motherboard, and to a lesser extent on the characteristics of your cable (wire thickness, shielding, twisted pair grounding etc).

    Cable length being "too long" is not a simple matter of working or not working. It's about probability in the particular environment on the day. It's a bit like whether it's safe to have unprotected casual sex without condoms. A man who boasts that he's done so for many years without catching anything isn't necessarily lying. But it's more risky. Taking precautions doesn't always guarantee anything either, but it changes the odds.

  • #14
    Member AceR's Avatar
    Join Date
    Jan 2008
    Posts
    268
    Thanks
    4
    Thanked 49 Times in 26 Posts
    Rep Power
    211
    Reputation
    271

    Default

    Yes but there is a point where it gets out of hand. Sticking 5 dinga's on your knob is not going to make you any safer. You still want to be able to work on the thing without having to cram everything in and make it fiddly. I've used this on 5 different PC's so I say bollocks to 10cm wires.
    Member since March 2002 and still in the Blue

  • #15
    Junior Member
    Join Date
    Feb 2008
    Posts
    220
    Thanks
    3
    Thanked 14 Times in 14 Posts
    Rep Power
    204
    Reputation
    64

    Default

    Thanks for all the posts guys, appreciate the help

    Today i have tried to eliminate the length by getting rid of the ide cable in the pic, and having the solderless (now soldered to the board) wires directly to the Jtag interface. Jkeys is still saying 'unknown device'.

    Tomorrow if i get the time, I will attempt to build a jtag interface.

    Will tell you guys how I went.

    Cheers,
    keegs

  • #16
    Premium Member
    Join Date
    Jan 2008
    Location
    Melbourne
    Posts
    854
    Thanks
    246
    Thanked 87 Times in 69 Posts
    Rep Power
    243
    Reputation
    886

    Default

    Quote Originally Posted by keegs View Post
    Jkeys is still saying 'unknown device'.
    Are you picking up a 3.3v source from the ADB unit and not relying on whatever's coming from your parallel port ?

  • #17
    Junior Member
    Join Date
    Feb 2008
    Posts
    220
    Thanks
    3
    Thanked 14 Times in 14 Posts
    Rep Power
    204
    Reputation
    64

    Default

    Quote Originally Posted by jimbo123 View Post
    Are you picking up a 3.3v source from the ADB unit and not relying on whatever's coming from your parallel port ?
    No I'm not...I gather that you chuck a wire into the red psu plug on the motherboard and use that? Also where would you connect that on the jtag interface?

  • #18
    Senior Member
    fandtm666's Avatar
    Join Date
    Jan 2008
    Posts
    5,502
    Thanks
    244
    Thanked 990 Times in 465 Posts
    Rep Power
    1189
    Reputation
    40447

    Default

    Quote Originally Posted by keegs View Post
    No I'm not...I gather that you chuck a wire into the red psu plug on the motherboard and use that? Also where would you connect that on the jtag interface?
    ORANGE WIRE the very first one closest to the front of the decoder
    dont say linux if i wanted it id install it

  • #19
    Senior Member
    best4less's Avatar
    Join Date
    Jan 2008
    Location
    Australia
    Posts
    7,684
    Thanks
    3,487
    Thanked 2,207 Times in 1,132 Posts
    Rep Power
    757
    Reputation
    15165

    Default

    I have never never needed the 3.3v, have you tried a different computer ??
    Last edited by best4less; 20-09-09 at 12:08 PM.
    When you do things right, people won't be sure that you have done anything at all

  • #20
    Senior Member
    LeroyPatrol's Avatar
    Join Date
    Jan 2008
    Location
    N.E. Vic
    Posts
    16,229
    Thanks
    3,528
    Thanked 4,710 Times in 2,797 Posts
    Rep Power
    1669
    Reputation
    46551

    Default

    Quote Originally Posted by best4less View Post
    I have never never needed the 3.3v, have you tried a different computer ??
    same but prob depends on jtag board.

    Leroy
    XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
    XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS

  • Page 1 of 3 123 LastLast

    Similar Threads

    1. JTagging a UEC DSD660
      By LeroyPatrol in forum Other Hardware
      Replies: 23
      Last Post: 20-08-14, 08:21 PM
    2. Jtagging
      By LeroyPatrol in forum Technical and Development
      Replies: 53
      Last Post: 08-09-09, 03:05 PM
    3. Sam & Max issues
      By sublib25 in forum Nintendo
      Replies: 0
      Last Post: 14-08-09, 06:54 PM
    4. Jtagging Relook 400s
      By weirdo in forum Other Linux based receivers
      Replies: 14
      Last Post: 17-06-09, 10:21 PM
    5. Jtagging?
      By porkop in forum Dreambox
      Replies: 0
      Last Post: 26-04-09, 06:44 PM

    Bookmarks

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •