power steering hacking

[V8Cobrakid]

bump...

how's the project going?

[anthony.pray]

Originally Posted by V8Cobrakid

bump...

how's the project going?

UPS:
Scheduled Delivery: 03/24/2008
The part was on back order...

O took the car into the dealer yesterday for the 25000 maintenance, they did not say any thing about the new switch and DB9 connector that was installed.

I dont have a way of reading read the canbus data. The Make controller might be able to encode/decode CAN frames but I do not know much about CAN. It might provide a simpler interface? Any one now how the pearly parking prius cars are interfacing in to the steering?

[ken1784]

Originally Posted by anthony.pray

I dont have a way of reading read the canbus data. The Make controller might be able to encode/decode CAN frames but I do not know much about CAN. It might provide a simpler interface?

The new 2004 Toyota Prius : My CAN Project

Any one now how the pearly parking prius cars are interfacing in to the steering?

The main brain is IPA computer, which interface are...
[INPUT]
- NTSC video from backup camera
- height signal from height sensor
- switch signal from IPA switch
- CAN messages

[OUTPUT]
- RGB video to MFD
- AVC-LAN message to MFD
- voice to speaker
- CAN messages

[CAN messages]
- steering angle from steering angle sensor
- target steering angle to power steering computer
- torque/actuator status from/to power steering computer
- vehicle speed status from/to skid control computer
- motor angle/shift status from HV control computer

Ken@Japan

[anthony.pray]

ken1784 thanks for the info.
I might know now what that "outer" sensor was. It might be the "steering angle sensor"
I do not know any thing about CAN or how it works. Hear is the C library I have to work with for CAN.
Can.c
Can.h

Ken if you know enough about CAN to help out / point me in the right places to look, That would be wonderful.

I did get my package, But I am having some problems getting the DAC to function.
Hear is the DATA Sheet for the TLC7524
I did try to set up the example on Pg.5 but it did not seem to work.
I did not have an spare Op-Amp, to try out Figure 3., but will try to get one today.

[ken1784]

Originally Posted by anthony.pray

ken1784 thanks for the info.
I might know now what that "outer" sensor was. It might be the "steering angle sensor"
I do not know any thing about CAN or how it works. Hear is the C library I have to work with for CAN.
Can.c
Can.h

The source code is written for Atmel AT91SAM7X256 microprocessor.
If you're familiar with the Atmel device programming including device architecture, register set parameters and others, it's not a big deal. But, if you're not, it's tough for you, I think.

Ken if you know enough about CAN to help out / point me in the right places to look, That would be wonderful.

Have you visited Attila's site shown before?
The new 2004 Toyota Prius : My CAN Project

Attila uses CAN232 device which does very simple job, CAN messages <-> RS232C data strings.
The software source codes are placed on his software page.
The new 2004 Toyota Prius : My CAN Project

The CAN message list is shown as a spreadsheet.
http://vassfamily.net/ToyotaPrius/CAN/PriusCodes.xls

I did get my package, But I am having some problems getting the DAC to function.

The IPA system implementation is very simple and does not use additional DAC or anything.
All controls are done by the IPA computer.
The IPA system uses the standard power steering computer and the power steering assembly, no interface change for the IPA system.
The IPA computer just sends CAN messages to control the power steering assembly.

Ken@Japan

[anthony.pray]

Got the DAC to work, and will be finishing up the controller board for it.

As far as CAN, I think it is a grate idea but, I do not have the hardware or the knowledge of the CAN system to do what I want. I do believe it may provide a beater interface, it may be come the platform I launch my new project form.

Will be posting video of the new controller, interfaced with the PC and a joy stick. Test if the software is working properly.
This may be a few days thou.

[anthony.pray]

So wow, a few months its been now, i started a new job, so i have not had any time to work on this much, but i looks like i got a current controller not voltage. so the first tests did not go. i have a new controller on order and will be hear on the 19th.

allso been fine-tuning the software, should have a working state line system in a few more days.
-tft

[Bill Merchant]

Let me know when you have something. I think the local group will be interested in what you're doing.

[anthony.pray]

So after hours working with the timing for the new chip and some fancy new hardware, I HAVE A WORKING system!!!
There has been some long hours, distorting 3 2051(8051)chips, and ~ 15 NPN's (ended up not using any)

Found out that using the car's voltage for running my circuit not a good plan, looks like it frys the gated outputs on my 2051's so after distorting 3 of them I stopped, lol.

I did the first test to day and hear is a short video of it in action.

Prius Digital Steering Interface

Prius Digital Steering Interface

IC used.
MCP41050 256 Step SPI 50kOhm
A89C2051 2kB Flash, 128B RAM

What's the status you ask?
1) I have a working tracking software for the road.
2) The computer controlled steering is all most dun, it is computer controlled but not yet verbal speed for rate of turning(see video).
3) Need to locate the angel sensor(I think i know where it is, no time today to test.)
4) complete the interface software for the steering once the angel sensor is incorporated.
5) Distance sensor for added automation.

[hiremichaelreid]

Wonderful.

I'm following your project with interest.

Is everything needed drive by wire ? I'm looking forward to "remote control" or autonomous Prii. From a technical perspective and under safe conditions of course.