Getting closer...

Discussion in 'Pyra News' started by EvilDragon, Jan 23, 2018.

  1. ible

    ible Advanced Guard Tower

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    i'd probably be happy with the A53s myself. the less times you have to charge things the more freedom you have. i have a dumb phone and it's nice not needing to charge it every day, like i'm imprisoned by the need for information or something... (although i get all that through a laptop, anyways...)
     
  2. levi

    levi Still fresh, damnit!

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    I do think the Pyra will probably have a shorter battery life than the Pandora, at least at first FWIW. Notaz did some good work a year or so ago to improve the Pandora's battery life especially when little used, and I recall back in the early days of the Pandora the scheduler needed to be tweaked. But the Pyra's powering more peripherals than the Pandora did, especially the 4G models, so who knows how long it'll ever run for after all the tweaking if it needs 4G on throughout.

    But I guess even phones with smaller batteries can keep 4G circuits running for 16 hours mostly, so perhaps I'm being overly pessimistic here. We'll see.
     
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  3. God Ginrai

    God Ginrai Godmaster

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    ED specifically increased the size of the battery so that the Pyra should be able to hit similar battery life as the Pandora.

    And if you can't be bothered to plug in your device when you go to sleep... that's your problem, not a problem of the device's battery life.

    -God Ginrai
     
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  4. rygD

    rygD Nihilistic Mystic

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    Good point about battery life. I still don't know how long it will actually last me until I try it out, though.

    Swappable batteries are nice, but useless when it comes to someone that isn't sitting at a desk all day. You have to charge those batteries at some point, and waking up in the middle of the night to switch them, assuming the first one is charged, is kinda unrealistic. And if you are sitting at a desk, changing batteries isn't very important. Levi shit this one on the head. Swapping is useful if you don't need to do it everyday.

    I want thinking ED would be the only one to make new CPU boards. Hopefully, down the road, someone else will want to try something different than what he has done or is doing.
     
  5. Swordfish II

    Swordfish II Very Active Member

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    My lg f3q lasts 3 days of actual usage, torrents, calls, texts, emulators...its great!
     
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  6. Dark Pulse

    Dark Pulse Retreaux

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    I got a OnePlus 5T (after my venerable OnePlus One decided to stop reading SIMs), and I have to say the battery life on it is great, despite being only about 3200 mAh or so. It really can go all day on a full charge, although thanks to my job, I'm able to come home and plug it into the charger for a few hours, so usually it ends the workday (both times - I go back to work after all) at perhaps 70% battery life.

    Of course, it also helps the charger delivers it 5V @ 4A, for 20 Watts of power.

    It literally does get about 60% of charge in about half an hour through a USB Type-C connector. Sadly, the phone doesn't support Power Delivery, despite me having a power bank that can support that (my Nintendo Switch most definitely appreciates that - it's good for up to 30W, and it caps out at 5V @ 3A for the USB-A ports, or for the Type-C port, 5V @ 3A, 9V @ 3A, 15V @ 2A, or 20V @ 1.25A. Despite the wall charger being good up to 39W, the Switch never pulls that much current - capping out at 9V @ 2A, 12V @ 1.5A, or 15V @ 1.25A for a total of about 18 Watts of charging power).

    To be honest, that is probably the single biggest drawback the Pyra has right now - lack of support for that means that heavy battery use will definitely result in a longer trip to the charger as well; a 6000 mAh battery is great for battery life, but it's also twice as much battery capacity to charge as most smartphones have.

    That said, without a board redesign, it's not something you could just "add," and to be fair, when the Pyra was in its earliest development stages, USB-C wasn't as common as it's starting to be now - Power Delivery itself is a fairly new spec.

    Maybe if there's an upgraded Pyra mainboard or something, or some other way to put in faster charge currents, that could be mitigated, but usually with USB-A plugs, they tend to top out at 5V and 2.1A at most. Hence, it'd be wise to have a powerbank if you plan to heavily use your Pyra on the go a lot - especially if you intend to drain it heavily.

    (If we could get some words from @EvilDragon on this, it'd help. I'd really like to know how long it takes to charge a nearly drained Pyra battery, and what sorts of charge currents it's capable of using.)
     
  7. Djoga'Ro

    Djoga'Ro moonstruck

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    Wasn't it said, that the Pyra could be charged via two ports simultaniously?
     
  8. Dark Pulse

    Dark Pulse Retreaux

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    If you could find that, I'd appreciate it. The main site itself says "one Micro-USB Serial Output-Port (which can also be used to charge the system)."
     
  9. Djoga'Ro

    Djoga'Ro moonstruck

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    My memory is fuzzy on that - been a while. I was just hoping someone with a fancier memory setup would get triggered. Maybe sleeping helps me remembering. I'll try immediately. Night night.
     
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  10. slaeshjag

    slaeshjag ¯\_(ツ)_/¯

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    At least for the earlier entries in the i.MX series, like the i.MX6 and 7, you can literally go onto mouser.com and buy *one*. Or two. Or five. Or a thousand. Low quantity is not going to stop access to the SoCs.
     
  11. sebt3

    sebt3 homebrew player (P. & C.)

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    I can confirm that it has been said... and that it do work and allow to charge faster
     
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  12. FBnil

    FBnil Waterfox > firefox

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    We come from the Nokia era?
     
  13. rygD

    rygD Nihilistic Mystic

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    I have another palmtop that lasts a few weeks to a month between battery changes, haven't tried rechargeable batteries, so...
     
  14. pocak

    pocak Member

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    Is this sarcasm? That's not how it works. The charger chip has only one USB port, so we have a switch chip in the Pyra that senses which USB socket (debug or OTG) has a power source plugged in, and routes that to the charger chip. Meanwhile, the other socket is electrically isolated. (I mean the power lines; a data connection is of course still possible.) If both have a valid voltage source, the debug port is preferred.

    The switch chip has a manual mode in which the OTG side is unconditionally selected. It's needed for using the OTG port as host, but could have other uses.

    One caveat is that fast charger detection is always done on the OTG port — detection uses the data lines, which are not switched. If you plug your charger in the debug port, it'll just default to 500mA. (If you have confidence in your charger, you could then crank up the current from the OS, up to 1.5A, though I don't know whether there's a driver already.) This might explain why you saw faster charging with two chargers, compared to one in the debug port alone.
     
  15. sebt3

    sebt3 homebrew player (P. & C.)

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    I've no cue on the hardware side. But as a user of a prototype, I can affirm that plug in power on the otg port and on the micro-usb3 port do allow to charge faster than using the otg only.
    I can even tell you that it's the only way to boot the pyra with batteries empty if you plug it on a PC for power source (any wall plug that doesnt wait for the negociation to send more than 0.5A would work too)
     
  16. pocak

    pocak Member

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    I've not studied the startup behavior, but it's still very odd. Was this area revamped since the schematics were published?
     
  17. WizardStan

    WizardStan Mega GP Mania

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    It has a USB charge port and a dedicated charge port, similar to the one in the Pandora. If I recall correctly, the Pyra has a micro USB "charge only" port (also serial debugging port) which has been wired to the dedicated lines on the chip, and the USB charging is wired to the actual USB3 micro USB port. The Pandora's charge chip didn't allow both to be used at the same time but the one in the Pyra is a different design which might allow it, though I don't remember reading that specifically. I'll have to dig up the spec sheet.
     
  18. pocak

    pocak Member

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    I wrote the above post based on the schematics. By "charger chip" I meant the bq24297, which really only has one 5V input/output. There was talk of looking for a chip with two 5V inputs, but I don't think anything concrete was ever mentioned, and it just fizzled out. And there's no need, really, since with the switcheroo chip (fpf3040), all the important use cases are covered.
    Yeah, that's what I've been referring to as "debug port".
     
  19. Djoga'Ro

    Djoga'Ro moonstruck

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    Waht I found in chronological order:
    I seems like it always has been the plan to be able to use two charge ports one by one and both at the same time. Then reality hit, though, I don't find anything like "Plans dropped, 'cause such'n'such". And now it seems to be as @pocak describes it. Both can be used for charging, but oly one or the other at any given time. Pity
     
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  20. Dark Pulse

    Dark Pulse Retreaux

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    So from the sound of things, both ports can be used to charge it, but both ports can't be used in conjunction to charge it twice as fast as normal.
     

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