Search found 2961 matches

by puff
Sun Feb 04, 2024 8:42 am
Forum: You and your build
Topic: 2004 BMW 760 N73 "A big mistake"
Replies: 198
Views: 200688

Re: 2004 BMW 760 N73 "A big mistake"

;-(
by puff
Tue Jan 16, 2024 10:12 am
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 161
Views: 304823

Re: Is stm32f4 the right chip?

what about risc-v family? e.g. https://habr.com/ru/articles/777504/
it has plenty of fancy features that might fit perfectly the engine management requirements.
by puff
Thu Dec 21, 2023 8:46 pm
Forum: Dev: Hardware
Topic: 3D printing ECU case - cost?
Replies: 72
Views: 72155

Re: 3D printing ECU case - cost?

btw, recently I discovered onshape.com - basically, it's an online CAD and it looks way better than fusion360
by puff
Thu Dec 21, 2023 8:42 pm
Forum: Dev: Hardware
Topic: 3D printing ECU case - cost?
Replies: 72
Views: 72155

Re: 3D printing ECU case - cost?

this doesn't look like sla. :) did you mean PLA?
by puff
Tue Oct 10, 2023 3:03 pm
Forum: Dev: Hardware
Topic: VR + knock module
Replies: 69
Views: 142752

Re: VR + knock module

I'd suggest to check how it works with low voltage cranking scenario.
by puff
Sat Sep 30, 2023 4:31 pm
Forum: Dev: Hardware
Topic: VR + knock module
Replies: 69
Views: 142752

Re: VR + knock module

donttrustit.jpg
donttrustit.jpg (25.9 KiB) Viewed 26111 times
by puff
Fri Apr 14, 2023 9:11 am
Forum: Dev: Hardware
Topic: F103 dual channel wideband controller + EGT + 2 x AUX In + 2 Aux out
Replies: 85
Views: 118248

Re: F103 dual channel wideband controller + EGT + 2 x AUX In + 2 Aux out

Metal enclosure for a board with bluetooth?
by puff
Tue Apr 11, 2023 10:09 am
Forum: Universal Boards
Topic: Proteus loses communication.
Replies: 4
Views: 10827

Re: Proteus loses communication.

that's a nice hint! Hadn't thought of that a while ago, when got disconnections trying to connect to my frankenstein)
by puff
Fri Apr 07, 2023 9:51 pm
Forum: You and your build
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 240
Views: 343085

Re: red 2003 VVT test mule Miata NB2 #27

В модуле Reset and Clock (RCM) (для STM32 это RCC) добавили бит включения тактирования FPU - RCM->AHB2CLKEN, бит с номером 1.

Только такое ощущение, что этот бит ни на что не влияет. Пробовал и выставлять его, пробовал и не выставлять - плавучка одинаково считается.
by puff
Fri Apr 07, 2023 9:45 pm
Forum: You and your build
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 240
Views: 343085

Re: red 2003 VVT test mule Miata NB2 #27

on the other hand, however: APM32F4xxx User_Manual_V1.6: programmable priority levels  A version: 8 priority levels (3-bit interrupt priority level could be used)  C version: 16 priority levels (4-bit interrupt priority level could be used) To check the rev.: Device ID register (DBGMCU_IDCODE) Waf...
by puff
Fri Apr 07, 2023 9:39 pm
Forum: You and your build
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 240
Views: 343085

Re: red 2003 VVT test mule Miata NB2 #27

I got a reply from the FAE: APM has NVIC with 8 levels, STM has 16 levels.
One very obvious problem we found is that the ADC calibration in system memory is missing. (non existent)
by puff
Sat Apr 01, 2023 5:07 pm
Forum: Dev: Hardware
Topic: Leaning new skills - making a M111 harness
Replies: 10
Views: 10446

Re: Leaning new skills - making a M111 harness

you could have opened an online master-class ;-)
or at least publish some videos of the process..

I was always wondering how the four (or the eight - in case of v8) same-coloured injector wires are connected together.
by puff
Sat Mar 25, 2023 9:20 am
Forum: Dev: Software
Topic: LIN bus
Replies: 13
Views: 19696

Re: LIN bus

which code? it's just raw data..
btw, googled for that BMW battery wire and got this:
"Плюсовой провод аккумуляторной батареи БМВ, Клемма аккумулятора BMW с пиропатроном" %-)))
by puff
Fri Mar 24, 2023 8:32 am
Forum: Dev: Software
Topic: LIN bus
Replies: 13
Views: 19696

Re: LIN bus

I am curious how much current does it consume when in sleep mode? ;-) Still, no protocol details :-( I wonder, what chip is inside. Is it possible to disassebme the firmware? or decyphering protocol is the way to go? sort of offtopic: there are also chinese BLE battery trackers, which provide detail...
by puff
Thu Mar 23, 2023 9:20 am
Forum: Dev: Software
Topic: LIN bus
Replies: 13
Views: 19696

Re: LIN bus

afaik, hall-based current sensors work best at some certain current range: if it is good for small currents, it won't work for large currents (btw, not sure, will it provide wrong readings or just fail). those intended for large currents (e.g. of a starter motor) won't read small values (sensitivity...
by puff
Wed Mar 22, 2023 11:56 pm
Forum: Dev: Software
Topic: LIN bus
Replies: 13
Views: 19696

Re: LIN bus

looks like a smart shunt? do you have the part number? know anything about its datagrams?
by puff
Sat Mar 11, 2023 3:26 pm
Forum: Misc
Topic: Is stm32f4 the right chip?
Replies: 161
Views: 304823

Re: Is stm32f4 the right chip?

by puff
Thu Mar 09, 2023 12:24 pm
Forum: You and your build
Topic: 1988 Peugeot 205 GTX from carburetor to EFI
Replies: 23
Views: 18673

Re: 1988 Peugeot 205 GTX from carburetor to EFI

It seems as all the voltage readings are wrong.
AndreyB, why do you say ignore MAP and TPS. They are clearly coupled to VBAT.
Could be broken adc in the chip itself?
by puff
Thu Mar 09, 2023 12:17 pm
Forum: You and your build
Topic: 1988 Peugeot 205 GTX from carburetor to EFI
Replies: 23
Views: 18673

Re: 1988 Peugeot 205 GTX from carburetor to EFI

malfunctioning voltage regulator? does it happen during cranking? bad battery? what software do you usually use to view .mlg files? megalogviewer is limited just to 500 values.
by puff
Sat Mar 04, 2023 9:33 pm
Forum: Dev: Hardware
Topic: Honda SEFMJ protocol
Replies: 19
Views: 25134

Re: Honda SEFMJ protocol

L-line is a third one, which is different from Lin
by puff
Sat Mar 04, 2023 9:32 pm
Forum: Dev: Hardware
Topic: Honda SEFMJ protocol
Replies: 19
Views: 25134

Re: Honda SEFMJ protocol

K-line and Lin, although based on usart, are still different protocols. The image from the scope could be a break frame sent by Lin master (right now playing with it) - it should be followed by sync byte (0x55), and Id byte, followed by data and crc.
by puff
Sat Mar 04, 2023 7:58 pm
Forum: Dev: Hardware
Topic: Honda SEFMJ protocol
Replies: 19
Views: 25134

Re: Honda SEFMJ protocol

LIN definitely looks different.
by puff
Sun Feb 19, 2023 11:06 pm
Forum: Dev: Software
Topic: Firmware developent status
Replies: 498
Views: 655625

Re: Firmware developent status

you can tell for sure by measuring the length of the start bit probably.
still, didn't get: it doesn't work even when bytes are sent from the usb-uart dongle? so, it's a firmware bug?
by puff
Sun Feb 19, 2023 8:49 pm
Forum: Dev: Software
Topic: Firmware developent status
Replies: 498
Views: 655625

Re: Firmware developent status

10400 is not supported by some usb-uart converters... (that's why people prefer ft232)
by puff
Sun Feb 19, 2023 7:52 pm
Forum: Dev: Software
Topic: Firmware developent status
Replies: 498
Views: 655625

Re: Firmware developent status

"No LIN transceiver is fully compliant to the K-LINE, but compatible. You can see the difference from the document. So I think TJA1021 can work"
https://community.nxp.com/t5/MPC5xxx/TJA1021-K-LINE-compatibilty/td-p/550725
unfortunatelly, it's 403 for me.
by puff
Sun Feb 19, 2023 7:08 pm
Forum: Dev: Software
Topic: Firmware developent status
Replies: 498
Views: 655625

Re: Firmware developent status

what's the schematics? which exactly wire is that? kline usually works at much higher levels (12v).
can it read bytes sent from usb-uart adapter?
by puff
Sun Feb 19, 2023 6:05 pm
Forum: Dev: Software
Topic: Firmware developent status
Replies: 498
Views: 655625

Re: Firmware developent status

there seems to be a 5 ms pause between these two bytes - could be a timeout
by puff
Sun Feb 19, 2023 11:36 am
Forum: Dev: Software
Topic: Firmware developent status
Replies: 498
Views: 655625

Re: Firmware developent status

5ms timeout?
by puff
Mon Feb 13, 2023 11:54 am
Forum: Misc
Topic: KICAD
Replies: 38
Views: 85644

Re: KICAD

you mean version 7.0.0?
"KiCad 6.0.* will no longer be maintained"