Search found 386 matches

by abecedarian
Sat Jan 17, 2015 5:24 pm
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23635

Re: MAP sensor module

Yep, forgot about that.
by abecedarian
Sat Jan 17, 2015 5:07 am
Forum: Dev: Hardware
Topic: MAP sensor module
Replies: 28
Views: 23635

Re: MAP sensor module

No capacitors as per the datasheet?
by abecedarian
Fri Jan 16, 2015 11:22 pm
Forum: Dev: Hardware
Topic: LIR2032 vs CR2032
Replies: 6
Views: 7573

Re: LIR2032 vs CR2032

russian wrote:
abecedarian wrote:In a perfect world...
that's SO off-topic :) perfect world... right...
Yeah, OT, but reasonable?
by abecedarian
Fri Jan 16, 2015 11:19 pm
Forum: Dev: Software
Topic: 4-wire narrow band control
Replies: 26
Views: 20157

Re: 4-wire narrow band control

Yep, I see that now, so stand corrected. :oops: The circuit would be similar, but instead of measuring voltages near ground potential, they'd be near 14+ volts- you could theoretically invert the circuit I posted. That would influence how the ADC would be set up, as in it wouldn't have a common V- r...
by abecedarian
Fri Jan 16, 2015 11:06 pm
Forum: Dev: Hardware
Topic: LIR2032 vs CR2032
Replies: 6
Views: 7573

Re: LIR2032 vs CR2032

In a perfect world, the ECU <i>will</i> be powered from the vehicle battery, with wake up signals from the key switch, which would make having a battery on board only useful if one is changing the vehicle's battery, or has disconnected the ECU for some purpose.
by abecedarian
Fri Jan 16, 2015 8:47 pm
Forum: Dev: Software
Topic: 4-wire narrow band control
Replies: 26
Views: 20157

Re: 4-wire narrow band control

Realistically, unless Chrysler decided to ground the heater through the sensor body to the exhaust pipe (bad idea anyhow) it doesn't matter how the existing ECU drives the O2 heater- there should be V+ and V- connections in the harness for the sensor(s) so however rusefi decides to drive it is how i...
by abecedarian
Fri Jan 16, 2015 7:12 pm
Forum: Dev: Software
Topic: 4-wire narrow band control
Replies: 26
Views: 20157

Re: 4-wire narrow band control

When it's on, the current is measured to determine the heater's temperature and if the temperature is proper, the heater is turned off. The periodic 'spikes' seen on the heater wire are caused by the ECU turning the heater on to measure the temperature and is a function of RPM. This defenitely fits...
by abecedarian
Fri Jan 16, 2015 6:32 pm
Forum: Dev: Software
Topic: 4-wire narrow band control
Replies: 26
Views: 20157

Re: 4-wire narrow band control

Most O2 sensors are not PWM heated. Rather, the heater is either on or off. When it's on, the current is measured to determine the heater's temperature and if the temperature is proper, the heater is turned off. The periodic 'spikes' seen on the heater wire are caused by the ECU turning the heater o...
by abecedarian
Tue Jan 06, 2015 11:22 pm
Forum: Dev: Hardware
Topic: stm32 LQFP48
Replies: 21
Views: 22130

Re: stm32 LQFP48

Polarity correcting, isolated CAN BUS interface.
http://www.ti.com/lit/ug/tidu422a/tidu422a.pdf <- device description / operation / BOM
http://www.ti.com/lit/df/tidr822/tidr822.pdf <- schematic
MCU sold separately. ;)

*edit- just realized I replied to the wrong topic. Please move if so desired.
by abecedarian
Tue Jan 06, 2015 4:26 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Tools, software, BSDL models and more for the TMS570LS1224 chip available here and on linked pages from there.
I.e. links to Code Composer Studio and other development tools including the NHET assembler, and debugger probes amongst other things.
by abecedarian
Mon Jan 05, 2015 12:11 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

5v supplies the 3v3 and 1v2 systems. 3v3 is for the TM4C as well as the TMS570's GIO; 1v2 is for the TMS570's internal, core logic. actually quite straight forward. the 570 doesn't have anything resembling tight power up timing, i.e. IO can come up before core and vice-versa. Proper "standards&...
by abecedarian
Mon Jan 05, 2015 12:07 am
Forum: Misc
Topic: Do you ever get "bored"...
Replies: 4
Views: 4624

Re: Do you ever get "bored"...

Not exactly sure that is what I meant when asking the question, but hey...
... to the extreme he rocks the mic like a vandal....
:)
by abecedarian
Sun Jan 04, 2015 4:07 pm
Forum: Misc
Topic: Do you ever get "bored"...
Replies: 4
Views: 4624

Re: Do you ever get "bored"...

That Olimex board is nice, but with DC in minimum of 9v, and -25C to 85C temp range, probably not really well suited to automotive internal combustion engines- voltage in cold temps or 'old' battery could easily drop below 9v during cranking. Kind of cool, though, that it's an STM32 processor, so ru...
by abecedarian
Sun Jan 04, 2015 8:31 am
Forum: Misc
Topic: Do you ever get "bored"...
Replies: 4
Views: 4624

Do you ever get "bored"...

... and just want to make something up? two-channel-lowZ-injector-driver.png Arduino compatible, two-channel low-impedance fuel injector driver based on LM1949 P&H driver; stack up to 6 of these and run a 12 cylinder engine? (Ignition drivers sold separately) ... while trying to figure out what ...
by abecedarian
Sun Jan 04, 2015 5:42 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Okay... found schematic (PDF), Eagle schematic / layout, Gerbers, BOM and a little more info here. Schematics reference RM46 chip but that chip is pin-compatible with TMS570LS1224 and both LP's use the same board. Links to download Code Composer Studio and HalCoGen on that page as well.
by abecedarian
Sat Jan 03, 2015 6:58 pm
Forum: Dev: Hardware
Topic: rusEFI display
Replies: 55
Views: 45551

Re: rusEFI display

Looking around at various sites and it seems those servos are rated 4v-6v; 3v3 might not be enough to drive them. Also, they suggest 400-2400ms pulse width. Since the board will require external power anyways, might as well let it take 12v from the vehicle and regulate down as needed. Might want to ...
by abecedarian
Sat Jan 03, 2015 3:51 am
Forum: Dev: Hardware
Topic: rusEFI display
Replies: 55
Views: 45551

Re: rusEFI display

Does anyone have any thoughts about this? I think I need a 'how to control a servo for dummies' thread so that I can try to control the serve which I have with as little brain activity as possible :) Servo's are pretty easy. Just send a PWM signal at the right frequency and they move. What we have ...
by abecedarian
Sat Jan 03, 2015 2:37 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Okay, computer's back online. Issues were related to HDD read errors which somehow resulted in making the computer unable to boot reliably. Now have nearly 4TB of storage. :D I agree the lack of FCC approval and other blurbs are typical cover-their-ass things. Anyhow, I haven't come across schematic...
by abecedarian
Thu Jan 01, 2015 3:17 am
Forum: Misc
Topic: Happy Holidays!
Replies: 7
Views: 8348

Re: Happy Holidays!

Happy New Year!!!
by abecedarian
Tue Dec 30, 2014 6:33 pm
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Sorry, am battling hard drive problems. Will reply soon.
by abecedarian
Sun Dec 28, 2014 6:42 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

... About an OS port, right now russian is relying heavily on the OS to deal with most of the portability and low level issues. The OS is providing pretty much all the low level interfacing with things like timers, and misc ADC registers and such. These drivers are a huge part of what ChibiOS is of...
by abecedarian
Sun Dec 28, 2014 5:26 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Kicad has several programs, and getting from one to the next is required for development but they are all separate, as in not really well put together.
If the folks at cern can fix it, you have a convert.
by abecedarian
Sat Dec 27, 2014 9:38 pm
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Yeah, Eagle free has board limitations: 1 sheet, 2 layers and 100x80mm layout area. I'm looking at going 'up' to the "hobbyist" which has 99 sheets, 6 layers and 160x100 board area. Either one fulfills the idea of having "BoosterPack" sized things, as those are typically 50x50mm....
by abecedarian
Sat Dec 27, 2014 8:49 pm
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

Free hardware, sure send it my way :) ... I know you jest, but I'm serious. PM your address and I'll send you one. ;) And I know changing hardware spec's in the middle of development is a PITA. BUT...! You and russian have already developed quite a stash of known, working hardware, and there aren't...
by abecedarian
Sat Dec 27, 2014 1:18 am
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

The board I'm speaking of now isn't the same board you opened a few months ago.

The kit you have:
launchpad-hercules1-02.jpg
launchpad-hercules1-02.jpg (321.34 KiB) Viewed 21266 times
The kit I'm now looking at:
hercules-tms57ols.jpg
hercules-tms57ols.jpg (303.51 KiB) Viewed 21266 times
by abecedarian
Fri Dec 26, 2014 10:27 pm
Forum: Misc
Topic: Maybe new rusefi target? TMS570
Replies: 96
Views: 78350

Re: Maybe new rusefi target? TMS570

If anyone other than I are serious about this, I'll buy 2 TMS670LS12x LaunchPad and send one to Sr. russian, and the other to Jared.
by abecedarian
Fri Dec 26, 2014 7:04 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63802

Re: Ignition modules

I guess that would make it a "not logic level" triggered device? ;) Absolutely. I was just trying to provide a closest similar. No worries. Like I said, I may be missing something. ;) Can you check 1994 Mazda Miata? The igniter is inside the coil pack. Have one I can borrow for a while? :D
by abecedarian
Fri Dec 26, 2014 6:46 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63802

Re: Ignition modules

I'm still not getting it. provided a logic-type level signal to trigger an igniter. J701 is a popular igniter which is triggered by +12v. I guess that would make it a "not logic level" triggered device? ;) But just a quick check on my side suggests it's powered by 12v on the black / yello...
by abecedarian
Fri Dec 26, 2014 6:18 pm
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63802

Re: Ignition modules

So, why provide something like ... MOSFET giving 12v out? 12v out is used to drive external logic-level ignition modules (not coils, but devices before the coil): Mazda Miata (integrated with the coil), Ford Festiva (J701), Mazda Protege (J701) Honda Accord (inside the distributor module) I'm still...
by abecedarian
Fri Dec 26, 2014 7:12 am
Forum: Dev: Hardware
Topic: Ignition modules
Replies: 71
Views: 63802

Re: Ignition modules

Been a while since I've really delved into the ignition systems on GM, Ford or Chrysler for that matter. To the best of my recollection, none of them drove the (+) 12v to the coil; they all switched the (-) ground or provided a logic-type level signal to trigger an igniter. My '89 Celica, '91 Toyota...