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Author Topic: Boost valve frequency adjustment?  (Read 12032 times)
amd is the best
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« Reply #15 on: March 02, 2018, 08:03:29 AM »

LOL this thread is hilarious

Lets hear what's comical to you.
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
_nameless
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« Reply #16 on: March 02, 2018, 08:08:01 AM »

LOL this thread is hilarious
Why because you're too dense to understand what's trying to be accomplished?
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« Reply #17 on: March 02, 2018, 08:11:39 AM »

Lets hear what's comical to you.
This guy is a smart ass who adds nothing but a thorn in the side. Look at his previous comments. Few words mainly mocking someone trying to learn. Guys like this will never learn and think they know everything
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grifrowl
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« Reply #18 on: March 08, 2018, 11:02:50 AM »

What software ver of CH-box are you using nick?
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amd is the best
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« Reply #19 on: March 08, 2018, 11:57:47 AM »

What software ver of CH-box are you using nick?


360101
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
grifrowl
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« Reply #20 on: March 14, 2018, 04:26:37 PM »

I took a brief look through my disassembly of 360854 but ran out of play time, and my competence level is pretty borderline with such things at the moment. I can trace down ldtv, but no idea where to go from there or if I even have the right idea.

On the subject of the Mac valves in general, we dealt with dc sensitivity issues with some crappy aem standalone on the fsae car using a fitting with a very small inner diameter as a restriction. We were essentially using the turbo as a damper in that situation, but that might be helpful if changing frequency proves difficult or ineffective.

I’ve only ever used them in 4port configuration on on a tial gate with me7. Pretty good results after linearization runs, reducing gain and other tweaking. Obviously that setup is fairly different from what you have going on.
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prj
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« Reply #21 on: March 15, 2018, 06:23:48 AM »

Read the datasheet for the processor, specifically about the PP, PW and so on registers that are in the PWM module.
The N75 DC gets generated by the primary processor (not the IO extender). The C167 has 4 PWM outputs in the PWM module.
Frequency is configurable and it is set up in an init block, all you have to do is change a single constant. You need to find which output is used for the N75 though (as it differs depending on ECU family), but it's pretty straightforward.
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amd is the best
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« Reply #22 on: March 15, 2018, 01:36:00 PM »

So I've done some digging and found a little bit of info that I think should be helpful. It would be more helpful if I knew anything about dis-assembly but I am willing to learn.

I found the datasheet for the 167 and have found the addresses for PWM outputs 0-3.

I then searched for those addresses in IDA and came up with the following.

It may be borderline spoon-feeding but am I headed in the right direction? Where should I go next?

« Last Edit: March 15, 2018, 01:37:42 PM by amd is the best » Logged

2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
nubcake
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« Reply #23 on: March 15, 2018, 01:48:45 PM »

So I've done some digging and found a little bit of info that I think should be helpful. It would be more helpful if I knew anything about dis-assembly but I am willing to learn.

I found the datasheet for the 167 and have found the addresses for PWM outputs 0-3.

I then searched for those addresses in IDA and came up with the following.

It may be borderline spoon-feeding but am I headed in the right direction? Where should I go next?

Load the binary to correct address (0x800000), convert it to code, then check references to PW registers.
Won't really make it any clearer, as you'll have to check actual functions working with those. That's a bit too difficult for someone with no (dis)assembly background.
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