[Ovmsdev] Brake light control (was Re: Prototyping expansion board)

Michael Balzer dexter at expeedo.de
Mon Apr 22 03:15:14 HKT 2019


Silly me, I somehow thought the ext12v should be reserved to power additional high level equipment, but that's of course the most simple solution.

I've already ordered a set of these: https://www.amazon.de/dp/B07912HD6H/ref=pe_3044161_185740101_TE_item

…so I will be able to use the EGPIO lines as well. But I'll add the ext12v line to the control options.

Regards,
Michael


Am 21.04.19 um 15:01 schrieb Mark Webb-Johnson:
> If changing vehicle.{h, cpp} framework, I suggest leaving a hook in to allow the vehicle module to override / supplement this. In particular, the brake light
> may be controllable via can message on some vehicles.
>
> You can look at the ext12v circuit to see how to control this.
>
> The ext12v system is a switchable 12v line already wired up and available on DA26 expansion. Would be trivial to put an external relay on that to switch brake
> lights.
>
> Regards, Mark.
>
>> On 21 Apr 2019, at 1:32 AM, Tamás Kovács <kommykt at gmail.com <mailto:kommykt at gmail.com>> wrote:
>>
>> JP1 pin 1 (+3.3) ----- [ 680 Ohms ] ---+--- [ LED ] ----- pin 28 (GND)
>>                                        |
>>                                     pin 12 (EGPIO_8)
>>
>> I can connect a 680Ohm resistor first end to pin1, a second end to pin12, and the led positive side to pin12 and negative to pin28(gnd). Now I have only
>> 470ohm resistor at home, I tested now with a 4V li-ion battery and my red led power is 4mA. I can use this (470Ohm) resistor or buy a 680Ohm.
>> Tomorrow I remove the OVMS module from my car, and create some test, if the resistor (470Ohm) is OK. 
>> I used this calculator for led series resistor calculation (I used a red Led): http://ledcalc.com <http://ledcalc.com/>
>>
>> Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> ezt írta (időpont: 2019. ápr. 20., Szo, 11:16):
>>
>>     Be aware the MAX71317 outputs are open drain, so you need a pull up resistor to e.g. +3.3. According to the data sheet, the current should stay below 6 mA.
>>
>>     I've just done a quick test wiring like this:
>>
>>     JP1 pin 1 (+3.3) ----- [ 680 Ohms ] ---+--- [ LED ] ----- pin 28 (GND)
>>                                            |
>>                                         pin 12 (EGPIO_8)
>>
>>     Works as expected.
>>
>>     Regards,
>>     Michael
>>
>>
>>     Am 19.04.19 um 09:59 schrieb Michael Balzer:
>>>     Sure.
>>>
>>>     You need to route an EGPIO line to the DA26 port. For a first test you can add a simple jumper on expansion port pins 10/12 to route EGPIO_8 to GEP_7 (=
>>>     pin 21 on DA26).
>>>
>>>     You should then be able to use the "egpio" command to test your LED. EGPIO_1 … _8 labels correspond to MAX7317 ports 2 … 9, so to control EGPIO_8, do:
>>>
>>>         OVMS# egpio output 9 1  # EGPIO_8 on
>>>         OVMS# egpio output 9 0  # EGPIO_8 off
>>>
>>>     (correct me if I'm wrong, Mark)
>>>
>>>     I wasn't aware there are other cars in need of something like this. I'll think about adding the logic as an option to the vehicle framework, but I can
>>>     send you some patch to test this on your i-MiEV/clone first.
>>>
>>>     Regards,
>>>     Michael
>>>
>>>
>>>     Am 19.04.19 um 09:24 schrieb Tamás Kovács:
>>>>     I can add for testing a simple led (with resistor) , same as SimpleConsole (twizy OVMS V2), to show car is recuperating, connected to DA26 external
>>>>     expansion port?
>>>>
>>>>     Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> ezt írta (időpont: 2019. ápr. 19., P, 9:17):
>>>>
>>>>         As the Mitsubishi code also reads battery current/power level from CAN, it would be trivial to add the same logic there.
>>>>
>>>>
>>>>         Am 19.04.19 um 06:52 schrieb Tamás Kovács:
>>>>>         The Trio (Mitsubishi I-Miev and clones) does not activate the brake light on recuperation on 2105 and older models, if this is work is very
>>>>>         impressive.
>>>>>
>>>>>         Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> ezt írta (időpont: 2019. ápr. 18., Cs, 23:08):
>>>>>
>>>>>             Mark,
>>>>>
>>>>>             that looks very good. Not sure about general demand, but I think we should have this to enable simple custom hardware I/O extensions.
>>>>>
>>>>>             For the Twizy, I was thinking about adding logic to control the brake light from the module. The Twizy does not activate the brake light on
>>>>>             recuperation, as that's normally (untuned) not very strong. But a tuned Twizy allows one pedal driving, so needs this.
>>>>>
>>>>>             Looking at our case I also think one custom extension board should fit on top of the modem.
>>>>>
>>>>>             Regards,
>>>>>             Michael
>>>>>
>>>>>
>>>>>             Am 18.04.19 um 02:36 schrieb Mark Webb-Johnson:
>>>>>>             It seems the attachments were messed up, so attaching again…
>>>>>>
>>>>>>             Regards, Mark.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>             On 17 Apr 2019, at 10:07 PM, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>>>>>>>
>>>>>>>
>>>>>>>                 Design layout. Looks good to me, but open to suggestions...
>>>>>>>
>>>>>>>
>>>>>>>                 We can make in sets of three PCBs, to keep prices down.
>>>>>>>
>>>>>>>
>>>>>>>                 Regards, Mark
>>>>>>>
>>>>>>>
>>>>>>>             On 8 Apr 2019, at 12:05 PM, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>>             A kit of 5 PCBs + SIP edge connectors + mounting hardware, unsoldered, would be about US$15 + shipping. About US$3/board set. With shipping
>>>>>>>>             I don’t think this is worth doing with less than 3 or 5 boards per kit.
>>>>>>>>
>>>>>>>>             Would this be useful?
>>>>>>>>
>>>>>>>>             Regards, Mark.
>>>>>>>>
>>>>>>>>>             On 7 Apr 2019, at 9:08 PM, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>>>>>>>>>
>>>>>>>>>             This is the closest we have today:
>>>>>>>>>
>>>>>>>>>             <image1.jpeg>
>>>>>>>>>
>>>>>>>>>             That is a bare modem board, with just the sip connectors. The prototype above is a K-line transceiver.
>>>>>>>>>
>>>>>>>>>             I think it would be trivial, and cheap, to make up what you show. Perhaps just solder ready pads at 0.1” pitch, then the side sip
>>>>>>>>>             connectors wired to the first row of pads at each edge. Perhaps 5 PCBs in a kit, with sip edge connectors, unsoldered, in a simple plastic
>>>>>>>>>             bag.
>>>>>>>>>
>>>>>>>>>             Does that sound like something useful? If so, I can ask the China guys for some idea of pricing. If it is just the unsoldered pcbs +
>>>>>>>>>             parts, I don’t think it will be expensive.
>>>>>>>>>
>>>>>>>>>             Regards, Mark
>>>>>>>>>
>>>>>>>>>             On 7 Apr 2019, at 4:38 PM, Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> wrote:
>>>>>>>>>
>>>>>>>>>>             Mark,
>>>>>>>>>>
>>>>>>>>>>             do you know of some kind of prototyping board available that fits to our piggy back expansion layout?
>>>>>>>>>>
>>>>>>>>>>             Something like this: https://www.robotshop.com/de/de/cytron-arduino-proto-schild.html
>>>>>>>>>>
>>>>>>>>>>             Regards,
>>>>>>>>>>             Michael
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>             Am 03.04.19 um 06:48 schrieb Mark Webb-Johnson:
>>>>>>>>>>>
>>>>>>>>>>>             If you have work to do on this DA26 expansion ports, this is pretty cool and well built:
>>>>>>>>>>>
>>>>>>>>>>>                 https://www.aliexpress.com/item/26-Pin-D-SUB-DB26-3-Rows-Serial-Parallel-Port-Serial-Shellless-Male-And-Female-Connector/32886738786.html?spm=a2g0s.9042311.0.0.20924c4dg34EEU
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>             _______________________________________________
>>>>>>>>>>>             OvmsDev mailing list
>>>>>>>>>>>             OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
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>>>>>>>>>>
>>>>>>>>>>             -- 
>>>>>>>>>>             Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>>>>>>>             Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>>>>>>>             _______________________________________________
>>>>>>>>>>             OvmsDev mailing list
>>>>>>>>>>             OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>>>>>>>>             http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>>>>             _______________________________________________
>>>>>>>>>             OvmsDev mailing list
>>>>>>>>>             OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>>>>>>>             http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>>>
>>>>>>>>             _______________________________________________
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>>>>>>>             OvmsDev mailing list
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>>>>>>
>>>>>>
>>>>>>             _______________________________________________
>>>>>>             OvmsDev mailing list
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>>>>>>             http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>
>>>>>             -- 
>>>>>             Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>>             Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>>
>>>>>             _______________________________________________
>>>>>             OvmsDev mailing list
>>>>>             OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>>>             http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>
>>>>>
>>>>>
>>>>>         -- 
>>>>>         Üdvözlettel:
>>>>>         Kovács Tamás
>>>>>
>>>>>         _______________________________________________
>>>>>         OvmsDev mailing list
>>>>>         OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>>>         http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>
>>>>         -- 
>>>>         Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>         Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>
>>>>         _______________________________________________
>>>>         OvmsDev mailing list
>>>>         OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>>         http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>
>>>>
>>>>
>>>>     -- 
>>>>     Üdvözlettel:
>>>>     Kovács Tamás
>>>>
>>>>     _______________________________________________
>>>>     OvmsDev mailing list
>>>>     OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>>     http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>>     -- 
>>>     Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>     Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>
>>>     _______________________________________________
>>>     OvmsDev mailing list
>>>     OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>>     http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>>     -- 
>>     Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>     Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>
>>     _______________________________________________
>>     OvmsDev mailing list
>>     OvmsDev at lists.openvehicles.com <mailto:OvmsDev at lists.openvehicles.com>
>>     http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>>
>>
>> -- 
>> Üdvözlettel:
>> Kovács Tamás
>> _______________________________________________
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>
>
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-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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