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).
Search found 39 matches
- Wed Jun 13, 2018 9:31 am
- Forum: Dev: Software
- Topic: CAN support
- Replies: 68
- Views: 59348
- Wed Jun 13, 2018 8:46 am
- Forum: Dev: Software
- Topic: CAN support
- Replies: 68
- Views: 59348
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
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
- Tue May 09, 2017 10:01 pm
- Forum: Dev: Hardware
- Topic: Prometheus - NEW compact ECU shield!
- Replies: 160
- Views: 181401
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)
and also commented it here.
(don't have currently free time, pls. trace my posts in a history for that)
- Tue Apr 25, 2017 9:00 am
- Forum: Dev: Software
- Topic: ISO 9141-2 Diagnostics
- Replies: 18
- Views: 21817
Re: ISO 9141-2 Diagnostics
510 ohm must be in a scanner ONLY, not in an ecu.
- Tue Apr 25, 2017 7:53 am
- Forum: Dev: Software
- Topic: ISO 9141-2 Diagnostics
- Replies: 18
- Views: 21817
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.
- Sun Apr 23, 2017 6:02 pm
- Forum: Dev: Software
- Topic: ISO 9141-2 Diagnostics
- Replies: 18
- Views: 21817
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
Odesláno z mého SM-A320FL pomocí Tapatalk
- Sat Nov 05, 2016 6:23 pm
- Forum: Dev: Hardware
- Topic: HC-05 blue tooth
- Replies: 12
- Views: 9931
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.
- Thu Nov 03, 2016 6:24 pm
- Forum: Misc
- Topic: Raspberry Pi Zero
- Replies: 14
- Views: 10501
Re: Raspberry Pi Zero
I am for lcd touch gauges too. Receive data from can (rusefi broadcasts) Does rpi Zero have CAN ?
- Sat Aug 27, 2016 6:59 pm
- Forum: Dev: Software
- Topic: Returnless fuel lines
- Replies: 19
- Views: 15645
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 ...
- Thu Aug 25, 2016 7:07 am
- Forum: Dev: Software
- Topic: Returnless fuel lines
- Replies: 19
- Views: 15645
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.
- Tue Dec 08, 2015 8:59 pm
- Forum: You and your build
- Topic: Two stroke Efi (#14)
- Replies: 140
- Views: 108171
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.
- Fri Dec 04, 2015 2:45 pm
- Forum: Dev: Software
- Topic: CAN support
- Replies: 68
- Views: 59348
Re: CAN support
Are there any diferencies between raw can in STN and ATCAF0 in ELM ? What do you think exactly with that ?Rhinoman wrote:The STN1110 is ELM compatible and supports raw CAN, that would be worth looking at.
- Fri Dec 04, 2015 10:23 am
- Forum: Dev: Software
- Topic: CAN support
- Replies: 68
- Views: 59348
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...
- Thu Dec 03, 2015 9:38 pm
- Forum: Dev: Software
- Topic: CAN support
- Replies: 68
- Views: 59348
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.
- Thu Dec 03, 2015 8:03 pm
- Forum: Dev: Software
- Topic: CAN support
- Replies: 68
- Views: 59348
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...
- Wed Jul 15, 2015 6:29 pm
- Forum: Dev: Hardware
- Topic: hip9011 - crystal issue
- Replies: 33
- Views: 27871
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 wil...
- Tue Jul 14, 2015 10:44 am
- Forum: Dev: Hardware
- Topic: hip9011 - crystal issue
- Replies: 33
- Views: 27871
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, sh...
- Mon Jun 01, 2015 8:20 pm
- Forum: Dev: Hardware
- Topic: external ADC
- Replies: 30
- Views: 23291
Re: external ADC
I am for simple "protocol" on CAN like is described here:
http://rusefi.com/forum/viewtopic.php?f=13&t=751&p=13050#p13036
It is fully usable and simplest.
http://rusefi.com/forum/viewtopic.php?f=13&t=751&p=13050#p13036
It is fully usable and simplest.
- Mon Jun 01, 2015 8:10 pm
- Forum: Dev: Software
- Topic: Frequency-producing MAF support?
- Replies: 13
- Views: 11773
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.
but trying to measure freq. in sw with multitasking environment is not a good idea.
- Sat May 09, 2015 11:47 am
- Forum: Dev: Software
- Topic: narrow band oxygen sensor
- Replies: 13
- Views: 11484
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...
- Wed May 06, 2015 7:33 pm
- Forum: Dev: Software
- Topic: narrow band oxygen sensor
- Replies: 13
- Views: 11484
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 le...
- Sat Feb 14, 2015 5:43 pm
- Forum: Dev: Software
- Topic: MAF transfer function from injectior duty and AFM.
- Replies: 25
- Views: 20783
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-be...
- Fri Feb 13, 2015 1:46 pm
- Forum: Dev: Software
- Topic: MAF transfer function from injectior duty and AFM.
- Replies: 25
- Views: 20783
Re: MAF transfer function from injectior duty and AFM.
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%) !russian wrote:...known transfer function .... from aliexpress.com for about $30 shipped.
(MIL control follow this situation...)
Some scrapyard as source would be a better source.
- Sat Jan 17, 2015 11:45 pm
- Forum: Dev: Hardware
- Topic: MAP sensor module
- Replies: 28
- Views: 23649
Re: MAP sensor module
Is 40kPa usable minimum pressure? I thought there could be even lower pressure on idle.
Tomin
Tomin
- Tue Jan 06, 2015 8:58 pm
- Forum: Dev: Hardware
- Topic: stm32 LQFP48
- Replies: 21
- Views: 22131
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.
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.
- Sun Dec 21, 2014 6:19 pm
- Forum: Dev: Software
- Topic: idle IM_AUTO fixes and development.
- Replies: 45
- Views: 30442
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 opene...
- Sun Dec 21, 2014 10:49 am
- Forum: Misc
- Topic: CAN-EGT 8 channel thermocouple interface
- Replies: 40
- Views: 30768
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...
- Sun Dec 21, 2014 10:43 am
- Forum: Misc
- Topic: CAN-EGT 8 channel thermocouple interface
- Replies: 40
- Views: 30768
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 ...
- Sat Dec 20, 2014 9:51 pm
- Forum: Misc
- Topic: CAN-EGT 8 channel thermocouple interface
- Replies: 40
- Views: 30768
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...
- Sat Dec 20, 2014 9:48 am
- Forum: Misc
- Topic: CAN-EGT 8 channel thermocouple interface
- Replies: 40
- Views: 30768
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 ...