abs jtagging issues

[LeroyPatrol]

this is the board that works well and there is also a cct if you are handy with a soldering iron.



Leroy

[weirdo]

same but prob depends on jtag board.

Leroy

yeah, I guess it would depend on whether you're using a passive or active unit

[best4less]

And here is me giving advice when a mate made and gave me the only Jtag i have LOL

And by the way thanks mate for the Jtag

[weirdo]

And here is me giving advice when a mate made and gave me the only Jtag i have LOL

And by the way thanks mate for the Jtag

lol, I wonder if we have the same mate

[keegs]

Best4less / Weirdo: Would eithier of you be willing to lend me your jtag connector? PM if your're interested, maybe we can work something out

[satbeginner]

did you earth all the earth pins.made that mistake once .by memory there is around 4 or 5 pins.

[fudda]

did you earth all the earth pins.made that mistake once .by memory there is around 4 or 5 pins.

I think you'll find that they are earthed already.

[satbeginner]

i had to earth all one side if i remember correctly once or it wouldnt work.

[keegs]

Still no luck fellas

Here is a new pic of my new setup:


...and the wiring diagram I'm using to connect the pins to the jtagger.


Note the changes:
- different jtag interface (a member lent me one that has worked for him previously - thanks weirdo )
- no ide cable/shorter cable length from the board to the interface
- 3.3v power piggybacked off the orange wire

It's still wired according to the diagrams in my first post plus the 3.3v wire. I'm still getting the 'unknown device' error.

I'm starting to think that maybe my pinouts to the jtag interface may be incorrect as everything else i have followed to the tee. The picture that I'm going by is a bit unclear and my jtag interface has no markings on it, just pins. If somebody could post the proper pinouts, it would be much appreciated.

Cheers,
keegs

[best4less]

Have you tried a different jkeys

[jimbo123]

You sure the cable between the PC and jtag unit is right ? 25 way straight through ??

[keegs]

Have you tried a different jkeys

I downloaded the 'abs 8776 firmware.rar' file, and have tried different versions of Jkeys and different definition files. No luck

[keegs]

You sure the cable between the PC and jtag unit is right ? 25 way straight through ??

As far as i know it is. It's the same cable i use to flash dreamboxes (with the com port connector of course) so i assume it would be a straight through.

edit: here is a pic of the one i bourght from jaycar.

[fandtm666]

1:double check the connections

2:as i mentioned before solder a leg from a resistor or alike across the entire ground row

and i know that particular unit works perfectly

the cable dosnt look right either , it should be a 25pin m at one end 25f at the other end and plugs into the printer port on the computer (parallel port)

[keegs]

the cable dosnt look right either , it should be a 25pin m at one end 25f at the other end and plugs into the printer port on the computer (parallel port)

I did use a gender-bender on one end of the cable, but I don't see how this should change anything. All connections are double and triple checked to the diagrams I currently have. Can you please post the pinouts for the jtag unit? I just want to verify that I'm doing the right thing.

[fandtm666]

1: i designed the thing
2: i built the thing
3: i tested the thing

and it will only work on the 25pin printer port (parallel port of a computer)

The one you are using was not screen printed and the pinouts are

trst - gnd(connection i use) - tms - tdi - tdo - tck - gnd - +v

and looking at the pic you have everything connected incorrectly, the person who sent it to you to try should have sent the matching
header and cables i supplied initially

ALSO NOTE I HAVE NO FIRMWARE OR KNOW WHO WHAT AND WARE I JUST DESIGNED AND BUILT SOMETHING PEOPLE NEEDED

[jimbo123]

the cable dosnt look right either , it should be a 25pin m at one end 25f at the other end and plugs into the printer port on the computer (parallel port)

Guess we noticed the same thing,.. I'd guess its a serial cable,.. as it looks like one end has 2 connections a DB25 and (not pictured), a DB9.

[keegs]

@diavlo/jimbo - Seems that I'm going to the shops then to buy a printer cable, then soldering a leg accross all the ground points. Can you post the pinouts of the jtag unit? Thanks (Y)

[jimbo123]

edit: here is a pic of the one i bourght from jaycar.

You need a parallel cable.

[gado]

Isnt is a straight through 25pin serial cable M to F. A parallel cable has a Centronix end on it at one end.