I Killed My Simpad - Thread

[niv]

I'll admit that my cale is not the best - but it is only 27 cm long:
[img]http://www.cs.bgu.ac.il/~nivv/jtag/Picture071.jpg\" border=\"0\" class=\"linked-image\" /]

[img]http://www.cs.bgu.ac.il/~nivv/jtag/Picture070.jpg\" border=\"0\" class=\"linked-image\" /]

[img]http://www.cs.bgu.ac.il/~nivv/jtag/Picture067.jpg\" border=\"0\" class=\"linked-image\" /]

[img]http://www.cs.bgu.ac.il/~nivv/jtag/Picture069.jpg\" border=\"0\" class=\"linked-image\" /]

[img]http://www.cs.bgu.ac.il/~nivv/jtag/Picture066.jpg\" border=\"0\" class=\"linked-image\" /]

[img]http://www.cs.bgu.ac.il/~nivv/jtag/Picture072.jpg\" border=\"0\" class=\"linked-image\" /]

[geron]

You spent some more effort on the cable than I did. I simply soldered the resistors directly to the Sub25 connector, though the HowTo says they should be on the JTAG side. The ribbon cable is about 50cm long and goes straight to the black connector (all 10 wires). The TRST resistor (JTAG pin 1) is free floating at the Sub25 side. I wasn't sure whether it would work this way but it did. The hardest part for me was to compile the JTAG package.

From what I can tell from the pictures, your cable should work if you did not confuse any wires at the Sub25 (it's not clear visible) and the black connector is not twisted by 180°. But I guess you triple checked this meanwhile.

I will compare your pictures to my cable this evening. Maybe I can discover something anyhow.

Did you try
jtag> cable parallel 0x378 DLC5

[geron]

No, I can't find any obvious mistake. The only thing in doubt is the missing or cut off GND lines. Every signal line should be surrounded by GND lines to give them a defined wave impedance. So, just to make sure, I would use a 9 wire ribbon cable and connect every other line to GND at both sides.
If it still doesn't work, it's probably not because of the cable.

What error message do you get from jtag?

[niv]

thank you very much geron.
Jtag says it cant initate DLC5 cable at /dev/par0
then I try par1 and par2
when I : ls /dev/p* I see par0, par1 and par2
I need to try the address you gave me. I will report on Sunday when I get a chance at it.

Thanks again,
Niv