Develop a QCA7000 board?

[uhi22]

Table 2-4 says the pin 44 PLL_BYPASS has an internal pulldown. At least this is what I understand. But yes, the other table can be read as "extern pulldown required". While the device is powered, I measure a 35k pulldown, this should be fine.

[olegiv]

While the device is powered, I measure a 35k pulldown, this should be fine.

Thanks for the information

[johu]

Got mail from uhi today

Here is my first humble contribution:

Connected it up and got terminal message. Not sure if they are good?

Code: Select all

[7901161] [ModemFinder] Starting modem search
[7901197] raw AD 4086 4086 4086 7 1740, uInlet -203 V, temps -70 -70 -70 celsius, CPU  31 celsius
[7901407] HAL_CAN_AddTxMessage failed 1
[7901641] [ModemFinder] Number of modems: 0

No modem is found, is it normal?

[uhi22]

Does it find the modem directly after power up? If idling without connection, the modem seems to go to sleep. Need to measure and document the time, maybe one or two minutes.

[johu]

Indeed! Directly after powerup:

Code: Select all

[1051] [ModemFinder] Starting modem search
avail rx bytes: 311
[1084] Its a HomePlug message.
[1087] [PEVSLAC] received GET_SW.CNF
software version MAC-QCA7005-1.1.0.730-04-20140815-CS 
[1531] [ModemFinder] Number of modems: 1

[johu]

I thought about this pin mapping again. Since it is 2 connectors how about a clear split of signals that go to the charge port and those that go to the car? That would make it possible to have 2 separate wiring looms.

EDIT: just found you've done that as far as possible

[muehlpower]

Are there KiCat files from version 3? I can only find version 4 on github.

[uhi22]

The V3 is the commit of 2023-08-17. It is possible to use the commit history on GitHub, this leads to
https://github.com/uhi22/foccci/tree/e7 ... 13eda50d69

[uhi22]

Light bulb demo on alpitronics and ABB, using the foccci V3 and ccs32clara worked on the first attempt. On Tesla supercharger it did not work. Need to improve the logging situation, to further analyze this. Using SavvyCAN via WiFi, this is really nice, but at the moment the stability of my interface lacks, and the clara should provide more logging details on CAN.

[Bigpie]

Could the state B resistor also be on a transistor or a 12v square wave output to replicate the CP duty for AC charging?
I've given it a go, I can do a PR if you want? I've added another transistor, but perhaps a solder jumper would be sufficient?

[f0ld]

Hello,

I have been a silent reader of the FOCCS Threads in this forum for quite a while now. This Thread (and the inital PyPLC) is impressive. I want to thank everyone that made a contribution to this.
I intend to use this research as a base for a CCS Implementation in my Renault Zoe (somewhere in the far future when I have the money and time for this).

Just a quick question towards uhi22:
- Is the ToDo-list for ccs32clara on GitHub up to date? Currently still reading and trying to understand the code, but I think I might be able to contribute a little...

[uhi22]

Yes, every contribution is welcome, that's the idea of this open source development. Even collecting topics for the To-Do list is a valuable activity, and of course implementing these topics can be spread to several shoulders.

[xvyDFatih]

How can we detect AC or DC charging session as pev side?

Could the state B resistor also be on a transistor or a 12v square wave output to replicate the CP duty for AC charging?
I've given it a go, I can do a PR if you want? I've added another transistor, but perhaps a solder jumper would be sufficient?

[olegiv]

I apologize - if the question is not appropriate here.
Perhaps this question would be better placed at https://github.com/uhi22/ccs32clara
Looks like the QCA frame size may not always be correct?
File qca7000.c - function QCA7000checkRxDataAndDistribute - condition -(L2+10==L1)
What could be the reason for this?

[Bigpie]

How can we detect AC or DC charging session as pev side?

A duty of 5% signals PLC so would mean likely DC charging but could also be a Tesla AC EVSE.

[uhi22]

Looks like the QCA frame size may not always be correct?
File qca7000.c - function QCA7000checkRxDataAndDistribute - condition -(L2+10==L1)

Created an issue for this topic, to not overwhelm the thread here. Let's discuss the details in github. What is the observation, what is the question, what is the proposed change?
https://github.com/uhi22/ccs32clara/issues/1

[uhi22]

Does it find the modem directly after power up? If idling without connection, the modem seems to go to sleep. Need to measure and document the time, maybe one or two minutes.

The modem enters its "sleep mode" quite fast, after around half a minute. Afterwards the software will show "zero modems", this is not a defect, it is normal. The modem wakes up as soon as it sees a "homeplug central coordinator", which is in our case a charger.
Made these different states transparent in the RGB lightshow: https://github.com/uhi22/ccs32clara/blo ... k-patterns

[explorer232]

Hi uhi,
do you have some populated foccci board for sale? Thanks

[uhi22]

Unfortunately not. If we would have reservations for a batch of five, I would order a batch of five populated from jlcpcb. But you are the first who is asking. (Besides the three handmade samples for muehlpower, johu and me.)

[celeron55]

If you're looking for reservations for populated boards, I'd like one.

The boards come from JLCPCB with everything but the QCA7005, the big connector and the RF transformer in place, right?

I think I might be of help testing this as I have two running conversions and only one of them has CCS so far.

Of course if possible it would be best to include any new development ideas in a new batch so if it's not a suitable time for one, feel free to postpone.

[uhi22]

If I would order the batch at JLCPCB, I can add the QCA and the transformer here, and flash everything, and test it. So the only thing missing would be the big connector. Shipping in Europe should be easy.
Time-wise I'm quite limited at the moment, moving the flat in the next weeks...
And of course, if anybody else wants to order a batch at JLCPCB, just do it, I'd reserve one of it for further testing.

[dougyip]

I'll take a board as well! There is now a DC fast charger at our local track, so our goal for the 2024 race season is to stop using a diesel generator to charge our Tesla Cobra EV race car. I'm in North America, but will certainly pay for the courier charges.

[jrbe]

And of course, if anybody else wants to order a batch at JLCPCB, just do it, I'd reserve one of it for further testing.

How far along / how far away is v5?

I can put together an order for the US. Anyone who wants one in the US please reply to this message and keep adding usernames in a list. This will likely be without the transformer and other hand solder stuff, connector, etc. just the board and smd components JLC has in stock.

[dougyip]

I'll stay on the European list. Truthfully, I would rather pay the courier charges so I can take advantage of Uwe's kind offer to finish populating the board, flash, and test it!

[uhi22]

How far along / how far away is v5?

Very far away, unfortunately. Still in the beginning of the concept phase, and no time to bring this further.