[Ovmsdev] Brake light control (was Re: Prototyping expansion board)
Michael Balzer
dexter at expeedo.de
Sat Apr 20 17:16:23 HKT 2019
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
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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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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>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>
>>> _______________________________________________
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>>> Üdvözlettel:
>>> Kovács Tamás
>>>
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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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>>
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>> Kovács Tamás
>>
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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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> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
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