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Simchon
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« on: November 04, 2011, 05:12:46 AM » |
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hi everyone. I just got my x360glitchip and i was hoping someone could help me with my little situation. I followed gligli schema for the Jtag cable, but when i connected it to my pc, the program refused to identify it:  would someone please enlighten me?... Simchon. |
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maximilian0017
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« Reply #1 on: November 04, 2011, 05:35:27 AM » |
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Pics of the cable?
Some info on the pc? (e.g. win7)
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Simchon
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« Reply #2 on: November 04, 2011, 05:53:47 AM » |
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XP is the system... here's the cable, the schematic part:  thats the chip:  It had been checked numerous times  |
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maximilian0017
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« Reply #3 on: November 04, 2011, 05:58:46 AM » |
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Sometimes you look to hard...and you cannot see it.
Could you make a picture of the backside of the programing pcb amd the lpt connector?
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Simchon
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« Reply #4 on: November 04, 2011, 06:16:30 AM » |
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Alright here are the pics:   **BTW - maybe i shouldve soldered the 2 PHAT points on the chip before programing it?.... just a thought... |
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maximilian0017
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« Reply #5 on: November 04, 2011, 07:20:35 AM » |
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**BTW - maybe i shouldve soldered the 2 PHAT points on the chip before programing it?.... just a thought...
It won't win any prizes but the connections look pretty good. If you look in the bios of the pc how is the LPT port configured? Are you using a laptop or a PC?, can you try another pc? If not can you measure the voltage over VCC and GND? |
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Simchon
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« Reply #6 on: November 04, 2011, 08:32:58 AM » |
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actually i havent used a different computer, and im using a pc...
and i checked the ports and everything.
could the chip be damaged?
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maximilian0017
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« Reply #7 on: November 04, 2011, 08:45:20 AM » |
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Have you checked the LPT adress?
First try another pc, preferably an older one like a Pentium3 with XP.
If the above isn't an option try to measure the voltage between VCC and GND
Yes the chip could be damaged by static electricity(not that likely) or wrong connections earlyer, but there are a lot of reasons it wouldn't work so you have to check that first.
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skinnymathew
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« Reply #8 on: November 04, 2011, 09:51:29 AM » |
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I had a VERY short cable to program my CPLD and it wouldn't verify the write on any of the three PCs I tried it on.
In the end I used a 50cm M-F DB25 extension cable I had kicking around to move the CPLD and my mini cable away from the PC/monitor.
It worked a treat on all three machines with the extension.
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Simchon
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« Reply #9 on: November 04, 2011, 10:02:24 AM » |
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A. the machine used is a p4... today i will find a different machine...
b. u sure the extantion will help? from what ive known, a jtag cable should be short....
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skinnymathew
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« Reply #10 on: November 04, 2011, 10:51:10 AM » |
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That's what I thought, too, which is why I made mine so short (about 3 inches, it's a combined JTAG/NAND cable). However, it will only work with the extension attached.  |
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MagnusHydra
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« Reply #11 on: November 04, 2011, 11:57:15 AM » |
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For my X360 glitchip I made my own jtag wire using the tut in the Matrix Glitcher. I have the wires very shot so short I hold the chip and lpt thing I made at the lpt port. Flash the chip at an odd angel. I'll upload a pick later on today.
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k0mpresd
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« Reply #12 on: November 04, 2011, 12:30:27 PM » |
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i have the same problem using a homemade lpt jtag cable. lpt port runs at 3.3v natively so i only have the 220ohm resistor on the vcc/tdo line. tried with xilinx and 360gccprog. have also tried long and short wires. edit: got it working. i added a 3k3ohm resistor on the vcc line with no other resistors or diodes. now the board is detected ok!  |
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« Last Edit: November 04, 2011, 01:18:42 PM by k0mpresd »
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Simchon
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« Reply #13 on: November 04, 2011, 04:37:40 PM » |
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really? could you upload your solution? |
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k0mpresd
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« Reply #14 on: November 04, 2011, 04:52:31 PM » |
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very simple solution. no resistors or diodes. straight wire from lpt > chip except i put a 3k3 ohm resistor on the vcc line. worked first try.
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MagnusHydra
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« Reply #15 on: November 04, 2011, 05:04:47 PM » |
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 Diodes and resisters on the back. I did it quick and its slobby and I could of done it better or I could of done it without the pc board just would of taken longer. There are 2 diagrams I used  The other one  |
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Simchon
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« Reply #16 on: November 04, 2011, 05:06:56 PM » |
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I'll give it a try!
thanks man!
2 hours later: wait, it means i have to check the lpt voltage before..... I'll be on it later:)
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« Last Edit: November 05, 2011, 06:22:42 AM by Simchon »
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