Messages

1

SIMpad forum / Mmc Soldered. Driver Almost Working

« on: September 08, 2005, 09:40:54 am »

How about this:

date ; dd bs=4096 count=10000 if=/dev/zero of=/mnt/mmc/test ; sync ; date

This will write 40MB to the MMC and flush the cache. Then reboot to clean the cache and reread the file:

date ; cat /mnt/mmc/test  > /dev/null ; date

2

SIMpad forum / Mmc Soldered. Driver Almost Working

« on: September 08, 2005, 07:33:17 am »

This is very interesting, indeed. I'm wondering what read/write performance you did achieve on the mmc...

3

SIMpad forum / I Killed My Simpad - Thread

« on: September 02, 2005, 02:36:46 am »

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?

4

SIMpad forum / I Killed My Simpad - Thread

« on: September 01, 2005, 04:02:26 am »

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

5

SIMpad forum / I Killed My Simpad - Thread

« on: August 31, 2005, 04:08:56 am »

It's been a while since I jtagged my pad, so I can't remember exactly.
I believe, I didn't use /dev/parport because I hadn't parport support in the kernel. Instead I used
jtag> cable parallel 0x378 DLC5

How did you built your cable? It's important to keep it short and to have a GND line between each signal line.

6

SIMpad forum / Mmc Mod - Proposed Hardware

« on: August 26, 2005, 02:45:53 am »

I need to edit wiki

No, you don't. Just read further on:

Flash Procedure:

Connect the SIMpad to the power supply. You don't need to put the main board back into the housing and connect all internal cables. Put a jumper on J10 to keep power on. Plug the JTAG cable to the PC and to the SIMpad.

Never mind.  

7

SIMpad forum / Mmc Mod - Proposed Hardware

« on: August 25, 2005, 11:29:53 am »

I am still tring to Jtag may simpad back to life. got the connector in place, but no VCC at pin2 and pin 4.

Did you put the jumper on J10 to keep power on?