[Ovmsdev] Brake light control (was Re: Prototyping expansion board)
Michael Balzer
dexter at expeedo.de
Tue Apr 23 03:41:50 HKT 2019
Here's a simple web plugin to monitor acceleration levels and regen brake signal generation:
https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/blob/master/vehicle/OVMS.V3/components/ovms_webserver/dev/regenmon.htm
Am 22.04.19 um 19:24 schrieb Tamás Kovács:
> Now I tested a little bit. Works fine, bright the led when recuperating.
> But I look at the code and I not understand:
>
> accel = (speed - m_accel_refspeed) / (now - m_accel_reftime) * 1000;
>
> // smooth out road bumps & gear box backlash:
>
> accel = (StdMetrics.ms_v_pos_acceleration->AsFloat() * m_accel_smoothing + accel) / (m_accel_smoothing + 1);
>
> Use same variable, I think the first is unnecessary now.
>
Beg your pardon…?
The first line calculates the momentary acceleration, the second sends that value through a standard lowpass filter.
If you mean it could be written in one line, you're right, but I prefer readability.
Regards,
Michael
>
>
> Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> ezt írta (időpont: 2019. ápr. 22., H, 11:13):
>
> Pushed:
>
> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/b44d466580b6961ada5ae42500c3fea68cab0f8a
>
> - Vehicle framework: regenerative braking signal generation
>
> New config:
> vehicle [accel.smoothing] = 2.0 Acceleration smoothing factor (samples, 0 = none)
> vehicle [brakelight.enable] = no Regen brake light enable
> vehicle [brakelight.port] = 1 … MAX7317 output port number (1, 3…9, default 1 = SW_12V)
> vehicle [brakelight.on] = 1.3 … activation threshold (deceleration in m/s²)
> vehicle [brakelight.off] = 0.7 … deactivation threshold (deceleration in m/s²)
>
> New metrics:
> v.p.acceleration = acceleration/deceleration in m/s² derived from v.p.speed
> v.e.regenbrake = regenerative brake light state
>
> - Twizy web UI: regenerative braking signal configuration
>
>
> I've tested this using an LED on EGPIO_8, I'll do & document the Twizy hardware modification next weekend (if I receive my order in time…).
>
> @Tamás: to add the UI to the Mitsubishi code:
>
> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/blob/master/vehicle/OVMS.V3/components/ovms_webserver/src/web_displays.cpp#L1127
>
> Regards,
> Michael
>
>
> Am 22.04.19 um 04:12 schrieb Mark Webb-Johnson:
>> Yes, EGPIO1 had to be used for SN65 control so is not available for general use.
>>
>> Max7317 has 10 outputs (P0 .. P9):
>>
>> * P0 MDM EN (controls modem power)
>> * P1 SW CTL (to BTS452 for EXT 12v power control)
>> * P2 EGPIO1 (SN65 transceiver power saving control)
>> * P3 EGPIO2 available for general use
>> * P4 EGPIO3 available for general use
>> * P5 EGPIO4 available for general use
>> * P6 EGPIO5 available for general use
>> * P7 EGPIO6 available for general use
>> * P8 EGPIO*7* available for general use
>> * P9 EGPIO*8* available for general use
>>
>>
>> Regards, Mark
>>
>>> On 22 Apr 2019, at 3:36 AM, Michael Balzer <dexter at expeedo.de <mailto:dexter at expeedo.de>> wrote:
>>>
>>> Mark,
>>>
>>> btw: is EGPIO_1 not free for general use? The esp32can SN65 seems to be controlled by that line.
>>>
>>> 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>
>>>>>>>>>>>>>> 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
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>>>>>>>>>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
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>>>>>>>>>>>> OvmsDev mailing list
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>>>>>>>>>>>
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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
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>>>>>>> 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
>>>>> _______________________________________________
>>>>> 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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>>>> 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
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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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>
>
>
> --
> Üdvözlettel:
> Kovács Tamás
>
> _______________________________________________
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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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