Search found 39 matches

by Tomin
Wed Jun 13, 2018 9:31 am
Forum: Software
Topic: CAN support
Replies: 58
Views: 8175

Re: CAN support

It will depend on used chip there. Some ELM are based on 8bit 5Volt chips and some, ELS27 for example, is PIC24.... which is 3V3 chip.
I use dsPIC (like PIC24) on 3V3 with TJA1057. TJA needs 5Volt power, but is 3V3 compatible on CPU side/inputs (TX+RX pins).
by Tomin
Wed Jun 13, 2018 8:46 am
Forum: Software
Topic: CAN support
Replies: 58
Views: 8175

Re: CAN support

Cheapest option for CAN monitoring is ELM327.
comands:
ATSP6 - switch to CAN (pins 6+14)
ATH1 - switch header showing ON
ATCAF0 - CAN autoformating OFF (turn OFF ISO15765 format)
ATMA - start monitoring of the CAN
by Tomin
Tue May 09, 2017 10:01 pm
Forum: Hardware
Topic: Prometheus - NEW compact ECU shield!
Replies: 158
Views: 28744

Re: Prometheus - NEW compact ECU shield!

As per "crystal start oscil.", was not there big capacitance load in an schematic ? I think I saw some mistake like that there some time ago
and also commented it here.
(don't have currently free time, pls. trace my posts in a history for that)
by Tomin
Tue Apr 25, 2017 9:00 am
Forum: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 2613

Re: ISO 9141-2 Diagnostics

510 ohm must be in a scanner ONLY, not in an ecu.
by Tomin
Tue Apr 25, 2017 7:53 am
Forum: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 2613

Re: ISO 9141-2 Diagnostics

It's not a big problem to implement ISO protokol, But It's Not so Simple like added Two wires in the OBD connector. If you really want implement it, You Can try Google with "Stern iso protocol". There are sources somewhere.
by Tomin
Sun Apr 23, 2017 6:02 pm
Forum: Software
Topic: ISO 9141-2 Diagnostics
Replies: 18
Views: 2613

Re: ISO 9141-2 Diagnostics

Why old ISO if there is a faster, simpler and more versatile CAN ?

Odesláno z mého SM-A320FL pomocí Tapatalk
by Tomin
Sat Nov 05, 2016 6:23 pm
Forum: Hardware
Topic: HC-05 blue tooth
Replies: 12
Views: 1931

Re: HC-05 blue tooth

I use hc05 in my el.project arround cars also and did not have any trouble with EMI. I can provide a short init. code for first setting. Many pieces used and no problem.
by Tomin
Thu Nov 03, 2016 6:24 pm
Forum: Misc
Topic: Raspberry Pi Zero
Replies: 14
Views: 1559

Re: Raspberry Pi Zero

I am for lcd touch gauges too. Receive data from can (rusefi broadcasts) Does rpi Zero have CAN ?
by Tomin
Sat Aug 27, 2016 6:59 pm
Forum: Software
Topic: Returnless fuel lines
Replies: 19
Views: 2878

Re: Returnless fuel lines

It's not necessarily that complicated- it really depends on the car and how 'returnless' the system actually is. For example: on '99 to '05 (NB) Miatas the fuel system is called returnless, but it actually has a return integrated in.... So in such system you have constant press. in rel. to ambient ...
by Tomin
Thu Aug 25, 2016 7:07 am
Forum: Software
Topic: Returnless fuel lines
Replies: 19
Views: 2878

Re: Returnless fuel lines

Exactly. It will not be as simple. You will need to compensate fuel amount in conjuct.with actual pressure. Rate of press. drop in line depends on actual fuel consumption, .... It will not be simple.
by Tomin
Tue Dec 08, 2015 8:59 pm
Forum: Your car & your engine
Topic: Two stroke Efi (#14)
Replies: 136
Views: 25162

Re: Two stroke Efi (#14)

Usb is sensitive to noise unfort. You can try ferite bead on usb cable. To me helps in 60% cases.
by Tomin
Fri Dec 04, 2015 2:45 pm
Forum: Software
Topic: CAN support
Replies: 58
Views: 8175

Re: CAN support

Rhinoman wrote:The STN1110 is ELM compatible and supports raw CAN, that would be worth looking at.
Are there any diferencies between raw can in STN and ATCAF0 in ELM ? What do you think exactly with that ?
by Tomin
Fri Dec 04, 2015 10:23 am
Forum: Software
Topic: CAN support
Replies: 58
Views: 8175

Re: CAN support

Don't know about any tuning with ELM. I think only serial port or usb to serial port is supported in MS, no ? (http://www.tunerstudio.com/index.php/cablesandbluetooth) You can use ELM like a "retransceiver", but it is not so simple as with other "transparent" devices. ELM can not handle iso15765 mul...
by Tomin
Thu Dec 03, 2015 9:38 pm
Forum: Software
Topic: CAN support
Replies: 58
Views: 8175

Re: CAN support

Elm does not supp. long packets nativelly, but they could be sended with some added soft. in a master. So it would have to supp. in TS.
by Tomin
Thu Dec 03, 2015 8:03 pm
Forum: Software
Topic: CAN support
Replies: 58
Views: 8175

Re: CAN support

I don't know what protocol do you think. Prot. for diagnostic or for tuning ? I don't know anything about TS protocols, only about diagnostics. j2534 is a standard described protocol between PC application and diagnostic tool. It has nothing with protocol between diag.tool and ECU, what I know about...
by Tomin
Wed Jul 15, 2015 6:29 pm
Forum: Hardware
Topic: hip9011 - crystal issue
Replies: 33
Views: 5039

Re: hip9011 - crystal issue

kb1gtt: 470p capacitor is used for connection from external source of clock (CPU or ...) into HIP/TPIC in the PDF = without a crystal. But you use it in a setup with crystal. It is totally another situation. I think you should not tight crystal circuit with 470p to "ground", because it will be hard ...
by Tomin
Tue Jul 14, 2015 10:44 am
Forum: Hardware
Topic: hip9011 - crystal issue
Replies: 33
Views: 5039

Re: hip9011 integration

Is C169 really necessary ? (I just looked at SECU4 and there is no such workarround for startup.) OSCIN with C169 (470p??) has low impedance to "ground" (CS is tighted to log. 0 or log. 1 which is almost ground for oscilator, is not it ?) If you have troubles with startup of oscillator, should not b...
by Tomin
Mon Jun 01, 2015 8:20 pm
Forum: Hardware
Topic: external ADC
Replies: 29
Views: 4474

Re: external ADC

I am for simple "protocol" on CAN like is described here:
http://rusefi.com/forum/viewtopic.php?f ... 050#p13036
It is fully usable and simplest.
by Tomin
Mon Jun 01, 2015 8:10 pm
Forum: Software
Topic: Frequency-producing MAF support?
Replies: 13
Views: 2591

Re: Frequency-producing MAF support?

It is simple to measure (accurately) freq. with STM hw,
but trying to measure freq. in sw with multitasking environment is not a good idea.
by Tomin
Sat May 09, 2015 11:47 am
Forum: Software
Topic: narrow band oxygen sensor
Replies: 13
Views: 2803

Re: narrow band oxygen sensor

Single wire O2 needs the engine running for aprox 20 min before ... 4 wire (with heater) needs heaters turned on and engine running for aprox 5 minutes .... It is totally overstatemented. 20 minut ? No, it is much faster. 5 minutes is also too long. If you would like, I can find some link on youtub...
by Tomin
Wed May 06, 2015 7:33 pm
Forum: Software
Topic: narrow band oxygen sensor
Replies: 13
Views: 2803

Re: narrow band oxygen sensor

If sensor->v1 and v2 are values for "switchpoint", it is not a good idea, I think. It should be somewhere arround 0.5V. 0.9V is too high for rich condition and 0.1V is too small for lean condition. Some older lambdas tends to shift whole voltage characteristic down (even under 0Volts in lean !), so ...
by Tomin
Sat Feb 14, 2015 5:43 pm
Forum: Software
Topic: MAF transfer function from injectior duty and AFM.
Replies: 25
Views: 4755

Re: MAF transfer function from injectior duty and AFM.

Do you know if any US-available MAFs have full specs published? My friend uses this 0281002764 Bosch on DYI constructed flow bench. PDF with charact.graphs are here https://www.google.cz/search?q=0281002764.pdf&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:cs:official&client=firefox-beta&channel=sb&gfe_rd...
by Tomin
Fri Feb 13, 2015 1:46 pm
Forum: Software
Topic: MAF transfer function from injectior duty and AFM.
Replies: 25
Views: 4755

Re: MAF transfer function from injectior duty and AFM.

russian wrote:...known transfer function .... from aliexpress.com for about $30 shipped.
I doubt in exactness on it. I saw some cars with cheap chinese MAFs and theirs fuel corrections numbers were huge (out of max. 25%) !
(MIL control follow this situation...)
Some scrapyard as source would be a better source.
by Tomin
Sat Jan 17, 2015 11:45 pm
Forum: Hardware
Topic: MAP sensor module
Replies: 27
Views: 5831

Re: MAP sensor module

Is 40kPa usable minimum pressure? I thought there could be even lower pressure on idle.

Tomin
by Tomin
Tue Jan 06, 2015 8:58 pm
Forum: Hardware
Topic: stm32 LQFP48
Replies: 21
Views: 7313

Re: stm32 LQFP48

USB2CAN int. like Lawicel or so uses different command set than ELM.
ELM commands are not protected at all, what I know. No problem to use it.
But for clear CAN analyzing and communication "Lawicel" protocol is better (more straightforward) than ELM.
by Tomin
Sun Dec 21, 2014 6:19 pm
Forum: Software
Topic: idle IM_AUTO fixes and development.
Replies: 45
Views: 7050

Re: idle IM_AUTO fixes and development.

I very recomend to study Ford's strategy document (https://www.google.cz/search?q=ford+strategy+document+gufb&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:cs:official&client=firefox-beta&channel=sb&gfe_rd=cr&ei=rA2XVKe_IJPO8gPVwIDICg). I think there is fully/partially opened ICV valve while you are cruisi...
by Tomin
Sun Dec 21, 2014 10:49 am
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 8463

Re: CAN-EGT 8 channel thermocouple interface

About ISO15765, that seems like a good option, as it will probably be desired else where, for interfacing with off the shelf diagnostic equipment. The goal will of course to be only to use the MFG codes, and such to keep things legal friendly. ... Don't know about legality of using iSO15765. I hope...
by Tomin
Sun Dec 21, 2014 10:43 am
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 8463

Re: CAN-EGT 8 channel thermocouple interface

didn't get it. does this mean that the egt unit might just be sending out, say, each 50ms couple of messages, say with can ids 0x98 and x99 with temperature values for the eight cylinders, and should there be any other device on the bus sending out can messages with same can ids, the ecu would get ...
by Tomin
Sat Dec 20, 2014 9:51 pm
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 8463

Re: CAN-EGT 8 channel thermocouple interface

I thought we are talking about separate ECU for EGT measuring. Otherwise, in case of hardware of EGT in Rusefi ecu, I am for handling in STM, of course. No risk of more firmwares / version mismatches, ... i don't know anything of priorities. Priority is done from CAN ID. Transmitter what currently t...
by Tomin
Sat Dec 20, 2014 9:48 am
Forum: Misc
Topic: CAN-EGT 8 channel thermocouple interface
Replies: 40
Views: 8463

Re: CAN-EGT 8 channel thermocouple interface

puff: AVR has almost no support of CAN bus. Lets take any cheap 8bit PIC18F with CAN and you will have much simpler work and one chip less again. Every has 10bit ADC and with proper opamp and shifting to smaller scale (from temp. say 300C) in front of them it could be usefull for EGT range, no ? Or ...