Search found 3524 matches

by kb1gtt
Tue Jan 14, 2020 5:01 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 328
Views: 30939

Re: rusEfi own wide band controller board add-on using CJ125

I believe at the time, of the original circuit design, the SOIC24 was available, but the other was not. That might have changed as time progressed. I do not recall any specific design concerns, both should be able to work just fine.
by kb1gtt
Mon Jan 13, 2020 11:40 pm
Forum: Software
Topic: [info] rusEfi Scheduler Performance & Accuracy
Replies: 54
Views: 902

Re: [info] rusEfi Scheduler Performance & Accuracy

What is this picture that note the isr45? I don't see x numbers or units for either axis. I'm not sure what it is trying to convey.
by kb1gtt
Sun Jan 12, 2020 10:22 pm
Forum: Misc
Topic: FPGA in ECU
Replies: 31
Views: 3727

Re: FPGA in ECU

We are currently doing a bunch of clock cycles in the STM32 to decode the crank wheel and update the timer(s). Would we get less watts from the STM32 if that is not done by an STM32? Or are those clock cycles still consuming energy just not producing results? I think the watts are simply transferred...
by kb1gtt
Sun Jan 12, 2020 10:06 am
Forum: Misc
Topic: FPGA in ECU
Replies: 31
Views: 3727

Re: FPGA in ECU

Would we expect the Watts to go up, down or stay the same with the use of an fpga? I ask because some of the designs that are out there are very small. The Watts are important to consider for thermal regulation purposes on those small layouts. Could we some how include other features like a switchin...
by kb1gtt
Sat Jan 11, 2020 11:41 am
Forum: Misc
Topic: FPGA in ECU
Replies: 31
Views: 3727

Re: FPGA in ECU

Looks like MicroSemi's SmartFusion2 has an hard ARM, FPGA, AEQ cert, and many desirable features. The below flying lead chip costs about $18 and has inventory at Digikey. https://octopart.com/m2s005-tqg144-microsemi-52741915?r=sp&s=9fGERWwCS5SIkW1hndj5jw Basic overview of how to program and use the ...
by kb1gtt
Sat Jan 11, 2020 4:03 am
Forum: Misc
Topic: FPGA in ECU
Replies: 31
Views: 3727

Re: FPGA in ECU

Are these arm processors soft or hard?
https://www.arm.com/resources/designsta ... start-fpga

Does the altera cyclone have a hard processors?
https://images.app.goo.gl/HvTfhRwKhaACf2Ng7
by kb1gtt
Sat Jan 11, 2020 1:47 am
Forum: Misc
Topic: FPGA in ECU
Replies: 31
Views: 3727

Re: FPGA in ECU

Rusefi decodes some odd crank wheels which can be more difficult to implement in the fpga. Can rusefi some how relay the angle clock? That might be a way to fast track the less common crank wheels.
by kb1gtt
Sat Jan 11, 2020 1:37 am
Forum: Misc
Topic: FPGA in ECU
Replies: 31
Views: 3727

Re: FPGA in ECU

The micro semi board looks interesting. Don't they make FPGA's that have real arm cores and eeproms inside? Also boot times need to be remembered. You need to load the FPGA then start decoding the crank. How long does that take to get sync from powered on?
by kb1gtt
Fri Jan 10, 2020 10:08 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 135
Views: 16607

Re: Is stm32f4 the right chip?

Lets migrate FPGA talks to here.
viewtopic.php?f=13&t=803&p=26478
by kb1gtt
Fri Jan 10, 2020 10:02 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 135
Views: 16607

Re: Is stm32f4 the right chip?

right now, it drives an angle clock as the output ... like time .. but angle... so, SPI is not going to work for you ... this was designed to be 'more tightly bound' to a softcore on chip and the angle clock can be routed to all kinds of things like a hardware scheduler. Angle clock? I'm not follow...
by kb1gtt
Fri Jan 10, 2020 6:09 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 135
Views: 16607

Re: Is stm32f4 the right chip?

Long time no speak. Good to hear from you. Hmmmm, Gods work you say. ARM+FPGA --> Jesus ECU? That looks interesting. Some questions. -- What hardware is needed to do this? I'm assuming hall or some kind of VR interface circuit to generate the pulses. However what FPGA can that run on? -- What softwa...
by kb1gtt
Thu Jan 09, 2020 11:48 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 135
Views: 16607

Re: Is stm32f4 the right chip?

I agree, this seems like a solution in search of a problem. The problem this might solve is one of motivation. I think we are all hear because we are motivated to do something cool and interesting. I drive the practical solution to the problem. FPGA's check off a box in the cool and interesting cat...
by kb1gtt
Thu Jan 09, 2020 5:12 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 135
Views: 16607

Re: Is stm32f4 the right chip?

What is needed for the brain in terms of timing resolution? I know many often jump to 0.1 or 0.2 degree's of angular accuracy, but that's not really applicable to the MCU. The MCU has jitter and signal delays. Can we pick some parameters like RPM, dynamic RPM changes, and boil that down into paramet...
by kb1gtt
Thu Jan 09, 2020 10:24 am
Forum: Misc
Topic: teamviewer alternatives?
Replies: 5
Views: 113

Re: teamviewer alternatives?

There are many VNC's out there. ReaVNC is fairly good, same goes for TigerVNC or TightVNC, basically they all do the same thing. I recall one will allow for auto screen scaling, which is nice, while the others require you to specify the scale after you are connected. I haven't done it for a while, s...
by kb1gtt
Wed Jan 08, 2020 12:47 am
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 135
Views: 16607

Re: Is stm32f4 the right chip?

Some direct injection applications fire the injector 12 or so times during combustion. Small timing is an issue for those applications. I once looked at fpga, but that is another set of programming skills that I don't have. The below makes fpga programming much easier. I believe there has been zero ...
by kb1gtt
Wed Jan 08, 2020 12:38 am
Forum: Misc
Topic: teamviewer alternatives?
Replies: 5
Views: 113

Re: teamviewer alternatives?

I use vnc with a fellow at work. He sets up the port then it's fairly simple for me to connect.
by kb1gtt
Mon Jan 06, 2020 10:24 am
Forum: Hardware
Topic: let's choose an enclosure
Replies: 106
Views: 14794

Re: let's choose an enclosure

Harness side of this connector with wires installed cost how much?
by kb1gtt
Mon Jan 06, 2020 3:14 am
Forum: Hello World
Topic: Hi there !
Replies: 4
Views: 87

Re: Hi there !

I have 2 different cars with the 2.0T FSI's. Do you intend for direct injection? I'm not sure if the ME7's you mention have DI or not.
by kb1gtt
Mon Jan 06, 2020 3:09 am
Forum: Hello World
Topic: Hello from New England
Replies: 8
Views: 281

Re: Hello from New England

I see the first post has been updated. I once had a 1984 300ZX. Didn't have it long, just tried to flip it for some quick cash to by books for school. You might find our FSIO interesting. If you can control the solenoids, this feature of the software will likely allow you to control the solenoids wi...
by kb1gtt
Mon Jan 06, 2020 2:51 am
Forum: Hello World
Topic: Hello from New England
Replies: 8
Views: 281

Re: Hello from New England

I understand most OEM's program with a model based approach. We are using a table based approach. If you have a model based approach, you can model the entire system, using the the ECU as one piece of the simulation. With our current approach, you basically have to simulate with real world hardware....
by kb1gtt
Sun Jan 05, 2020 11:11 am
Forum: Hello World
Topic: Hello from New England
Replies: 8
Views: 281

Re: Hello from New England

New England you say. How close to Southern Maine are you?

MatLab you say. We have been considering trying to make a SciLab model based version of the code. Perhaps you might be interested in something like that.
by kb1gtt
Thu Jan 02, 2020 8:15 am
Forum: Your car & your engine
Topic: subaru ej20k
Replies: 12
Views: 428

Re: subaru ej20k

The default max9926 chip might be an issue. We might need to make some modifications to make it work. However that depends on the crank wheel. Some older Subaru crank wheels had gaps while cranking at around 300 RPM. I'll have to look I think we made an add-on VR MAX9926 which bypassed the watch dog...
by kb1gtt
Wed Jan 01, 2020 2:08 pm
Forum: Your car & your engine
Topic: subaru ej20k
Replies: 12
Views: 428

Re: subaru ej20k

Do you know your crank wheel pattern?
by kb1gtt
Mon Dec 30, 2019 4:24 am
Forum: Hardware
Topic: EFI for small engines
Replies: 45
Views: 2496

Re: EFI for small engines

What is a ball park price for a 100mm square alum substrate board?
by kb1gtt
Mon Dec 30, 2019 12:21 am
Forum: Hardware
Topic: EFI for small engines
Replies: 45
Views: 2496

Re: EFI for small engines

Yes you can pay for many things. Most people look to design for low cost china MFG and assembly. Those will generally be lower temperature PCB's.
by kb1gtt
Sat Dec 28, 2019 11:18 am
Forum: Your car & your engine
Topic: 2006 Volkswagen Passat 2.0 Turbo GDI test mule
Replies: 10
Views: 926

Re: 2006 Volkswagen Passat 2.0 Turbo GDI test mule

With 50 PSI pressure you can open and close with just 12v. You need the boost voltage when you have high pressure. Do you have a plan for generating high pressure?
by kb1gtt
Sat Dec 28, 2019 11:13 am
Forum: Hardware
Topic: EFI for small engines
Replies: 45
Views: 2496

Re: EFI for small engines

The fr4 PCB material is typically the limiting factor. The stm has low enough thermal resistance that the fr4 gets to hot before the stm gets to hot.
by kb1gtt
Sat Dec 28, 2019 11:10 am
Forum: Hardware
Topic: Ion Sense
Replies: 146
Views: 15868

Re: Ion Sense

I have not made progress after I toasted the Harley coil.
by kb1gtt
Thu Dec 19, 2019 5:20 pm
Forum: Hardware
Topic: microRusEfi
Replies: 218
Views: 18683

Re: microRusEfi

I believe return-less PWM fuel would be a fairly easy to implement, but would require an external driver. The PWM of 30A or what ever you fuel pump consumes is allot of energy to deal with, and is most likely best done with an external heat sink. I believe it could be done now with FSIO, and if some...
by kb1gtt
Tue Dec 17, 2019 5:26 pm
Forum: Hardware
Topic: microRusEfi
Replies: 218
Views: 18683

Re: microRusEfi

The below is a reference which could help better determine the watts generated, well really it predicts the rise in temperature of the die that is inside the injector driver. That temperature is what we care about, as it results in thermal shutdown. This is largely based on the thermal resistance to...