Saab T5 ECU

[x881]

I need some help flashing my ECU for my Saab.
It has a Motorola MC68332 Microcontroller and 2 AMD flash chips.
This is being done over at ECUtuning.com and trionictuning.com using the BDM tool that they have plans for on their site. I already have the USBBDM I bought from here, I just need some help getting the USBJTAGNT program to work with the saab ECU.
I get it all connected and it is reading something. It just seems to read different every time. I don't know too much about this but I am trying to learn. I have a script for anther program that does some things before you can read and write anything:

* Prepare SAAB T5 ECU for flash management (erase and program).
* This script needs to be executed before flash can be erased or programmed.
* Created by Patrik Servin
* Version 1.0
*
* Reset ECU
reset
* Stop execution
stop
*Set up for flashing
mm 0xfffa04
0x7f00.
*
mm 0xfffa21
0x0000.
*
mm 0xfffa44
0x3fff.
*
mm 0xfffa48
0x0405.
*
mm 0xfffa4a
0x6b70.
*
mm 0xfffa50
0x0405.
*
mm 0xfffa52
0x3370.
*
mm 0xfffa54
0x0405.
*
mm 0xfffa56
0x5370.
*
mm 0xfffc14
0x0040.
*
mm 0xfffc17
0x0040.
*
* enable internal 2kByte RAM of 68332
* and map it to address $100000
mm $fffb04
$1000.
* tell BD32 to use internal RAM $100000 for target resident driver
driver $100000
*

* ECU is now prepared for flash programming or erasing.

The program this is for is just called BD32. and it prepares the ecu and disables a watchdog.
Can I use this script somehow with USBJTAGNT or do I need to do something different? Or can it even be done with this tool? Any help is greatly appreciated.

[usbbdm]

Do you see BDM ON?
What target to you use? Have you tried ECU411 target?
You should issue reset 1 to enter BDM ON mode. Stay there and see if you see BDM ON forever.
IF not there is a chance that there is a watchdog. You need to know if it is software watchdog or hardware watchdog. if it is software watchdog then you need to disable it to get reliable read/write. Do not write until you are sure that the backup is right.

[x881]

BDM ON goes on as soon as I power up the ECU. And it stays on forever. I will then do a reset 1 and init using the ECU411 target. Every time I READ the ecu, the code comes out different every time. I am not sure of the watchdog but I'm pretty sure it's a software watchdog. This is what I'm guessing is giving me all the problems. How do I disable it?

[usbbdm]

BDM ON goes on as soon as I power up the ECU. And it stays on forever. I will then do a reset 1 and init using the ECU411 target. Every time I READ the ecu, the code comes out different every time. I am not sure of the watchdog but I'm pretty sure it's a software watchdog. This is what I'm guessing is giving me all the problems. How do I disable it?

The BDM ON on power on is not right. You need to see after reset 1 and see if it stays.

[x881]

I will try Monday. I'm away this weekend.

But I'm pretty sure it stays on all the time. Even after doing a reset 1

I really want to get your BDM tool working. I know there will be people from ecuproject buying them up if I can get it working correctly.

[usbbdm]

I will try Monday. I'm away this weekend.

But I'm pretty sure it stays on all the time. Even after doing a reset 1

I really want to get your BDM tool working. I know there will be people from ecuproject buying them up if I can get it working correctly.

Then issue command "reset" and see if it gest BDM off. This is important to see if it gets to proper BDM mode.

[x881]

I see BDM ON as soon as I plug in the ECU. I do "reset" and BDM goes to OFF. And A RESET 1 will turn it back to BDM ON

[usbbdm]

I see BDM ON as soon as I plug in the ECU. I do "reset" and BDM goes to OFF. And A RESET 1 will turn it back to BDM ON

Very good sign when you issue command "reset 1" and get BDM ON. You can go to irc at night and I might be able to remote help you out.

[x881]

Sure. I can get on IRC. Just let me know what time is good for you