CabröX

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About CabröX

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  1. CabröX

    NanoPI M4

    The thing is: The charger that sells FriendlyElec with the board is a copy of the Oneplus Dash charger and maybe for this charger to deliver all the power (nearly 4 amps) needs to have some negotiation between the load and the psu. As far as I know, the oneplus devices dont enter into this mode until something happens in the phone like 1 second after plugging in. I don't think the charger is delivering this amount of amps but maybe 2'5. I'll have to test it one of these days. EDIT: Confirmed, the Dash charger from oneplus complies with a protocol for the 4 amps to be delivered. This quote is extracted from the post from xda: https://forum.xda-developers.com/oneplus-3/accessories/dash-charge-protocol-analysis-t3431917/post68125991 "The charger waits for a current draw (i didn't bother testing it's thresholds) and then reads/checks-for the E²PROM embedded in the plug of the cable (presumably containing an authentication for dash). At a similar time the phone sends a kind of "preamble" consisting of high-low transitions of varying lengths (but this doesn't seem to important to the charger, it tries to "dash" even without it). Afterwards the phone and charger start exchanging 9 bits of data in bursts. One USB-Data-Line is clock, the other one is data. The chargers supplies the clock and the first 9 bits and after a short pause the phone gets to reply with another 9 bits as the charger supplies another "clock-burst". At the beginning (before dash-charging is in effect), the charger sends 150h and the phone replys with 158h. Once the phone is ready to begin dash-charging it replys with 178h instead. The charger then configures it's Step-Down Converter for ~4.5V of output voltage and then sends 148h to the phone. It either replies with 170h if the voltage is too high or 178h if the voltage is correct (I didn't see a reply for "too low", but it might exist). If the phone replies 170h the charger lowers the voltage by about 100mV-200mV and "asks" again. Once the phone replies with 178h the charger stops lowering the voltage and sends 14Ch to which the phone replies with 141h. During the dash-charging process the charger periodically sends 144h to which the phone replies with a number which seems to roughly coincide with the state of charge (i have seen values from 16Eh to 178h). The charger seems to nudge-up the voltage every once in a while (presumably when the current dropped below a threshold). If the battery is relatively full (i tested at 90% charge) the "dash-charging-cycle" doesn't even start and the communication stays at an exchange of 150h/158h data "words". I did some minor probing on the wall-wart with a stripped USB 3.0 extension and found that it uses the same commands but with the lowest bit set (i.e. it adds 1 to the command codes). Unfortunately the USB 3.0 cable had some internal resistance ruining most of the analog measurements. "
  2. CabröX

    NanoPI M4

    It is already in the friendlyelec shop to buy!
  3. CabröX

    NanoPI M4

    This is coming soon for sure!
  4. CabröX

    NanoPI M4

    Any news on this board? Is everything going as expected? Hyped to give it a new home (mine)
  5. CabröX

    NanoPI M4

    Waw looks amazing, definitely going to wait for it. The firsts versions of this SBC's usually come with hardware problems? And another question, is the back part (aluminium case) like a heat sink for the SoC? And will the final version come with it? Seems so nice.
  6. CabröX

    NanoPI M4

    Is there is an aproximate release date for this board? I would totally pick one, as I was having a look to the nanopc-T4 but I think is too much of an overkill for my projects and would like to get some raspberry pi cases too for this one! Thanks in advance.