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| Questions about the PinePhone component list |
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Posted by: amosbatto - 08-13-2020, 02:22 PM - Forum: PinePhone Hardware
- Replies (6)
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I have compiled a list of the components in the PinePhone v1.2a by looking at the schematic:
https://wiki.pine64.org/index.php?title=...onent_list
However, I have several questions, and maybe someone here can answer them.
What do the abbreviations DU, ED and FB mean when they are used to identify components? - DU : "U" is for an integrated circuit, but not sure what the "D" means. (e.g. DU1)
- ED : "D" is for a diode, but not sure what "E" means. (e.g. ED600)
- FB : ? (e.g. FB804, FB805)
Also, I see 2 accelerometers/gyroscopes on page 12 of the schematic:- U1202: TDK InvenSense MPU6050 six-axis, low-power MEMS gyroscope and accelerometer, QFN-24 4x4x0.9 mm [datasheet]
- U1204: Bosch Sensortek BMI120 3-axis gyroscope and accelerometer, LGA-14 2.5x3.0x0.83 mm
Note: Listed as “NC/BMI120”, where “NC” probably means “not connected”, so there may be circuits in the PCB for the part, but it is not placed on the board. This is probably an alternative to the MPU6050.
It looks like the Bosch part is not placed on the board, however, it looks like there are two magnetometers in the Pinephone and I can't figure out why:- U1200: STmicroelectronics LIS3MDL ultra-low-power three-axis magnetometer, LGA-12 2.0x2.0x1.0 mm [datasheet]
- U1203: Asahi Kasei Microdevices (AKM) AK09911 3-axis electronic compass IC with Hall sensor, 8-pin WL-CSP (BGA), 1.2×1.2×0.5 mm
or
- U1203: Voltafield Technology Corp. (VTC) AF8133J 3-axis electronic compass with proprietary anisotropic magneto resistive (AMR) technology, 8-pin WLCSP 1.2x1.2x0.5 mm
Note: Both parts are listed, so have to check the PCB to see which was used. It is not clear why this part is needed when the device already has the LIS3MDL.
Can someone please check on their PinePhone whether there are really two magnetometers and which models are being used.
Another question is whether the schematic for the Pine64 doesn't include all the circuits. I noticed that the schematic for the Librem 5 has twice as many parts as the PinePhone and has a lot more detail. I have compiled a list of the parts in the Librem 5 and the difference is noticeable:
https://source.puri.sm/Librem5/community...onent-list
Is the schematic for the PinePhone complete or did Pine64 leave out some of the circuits?
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| multiple operating systems? |
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Posted by: derekn - 08-13-2020, 12:35 PM - Forum: General Discussion on PinePhone
- Replies (8)
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I just ordered a PinePhone, and I've been doing some reading on the wiki... It sounds like it will be possible to get several SD cards, and install a different OS on each card, and then swap OSes by powering off, swapping the SD card, powering back on. Is that correct? I'm hoping it is, because it will make it super-easy to try out some of the more interesting (and maybe less polished) OS options.
Is there any particular reason to install an OS on the internal storage (versus SD card)? Maybe better performance?
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| Arch Linux Arm - external RTC problem |
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Posted by: max - 08-13-2020, 05:50 AM - Forum: Linux on Rock64
- Replies (1)
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I have connected an external RTC module (ds3231) to a Rock 64/4g.
I've loaded i2c-dev modules and rtc-ds1307 modules but my rtc mod is not detected by i2c (i2cdetect shows nothing connected at address 68)
Hardware is ok (if I boot with ayurfan distro I can see the external RTC module).
Could it be a kernel configuration problem? Has anyone had similar experience?
My Linux distro is Arch Linux Arm.
Regards
Max
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| UBports: headsup for Manjaro! |
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Posted by: Cree - 08-13-2020, 12:46 AM - Forum: UBPorts on PinePhone
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I like many others have remained focused on ub ports since the bulk of PP users either seem to use it or postmarket. I love the UI and responsiveness, consistent operating temp and overall stability. We appear to be very close to a working daily driver yet many things seem incomplete, held up in dev for a long time and it is taking a long time to iron out many bugs. Aside from UBports, i thought mobian may be showing the most promise and fastest progress. Until today, i checked into the very quiet Manjaro forum which has had limited activity and voila! Guess what? Looks like they have almost everything working and stable. Im posting this here under UB ports for one reason: i really like ubports and i think its got amazing potential. I think the devs here should take a good hard look at what Manjaro has quickly and simply done with a smooth and rapid roll-out. I feel some lessons can be learned and we can get ubports up to par! Perhaps ub & pmos got a bit too big and complex too fast making it harder to troubleshoot while manjaro kept it simple?
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| First Time User |
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Posted by: jaysprout - 08-12-2020, 11:59 AM - Forum: PineTime Tutorials
- Replies (3)
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All of the tutorials and videos I've seen look really super cool but before I go flashing/reformatting the watch and installing something new, I'd like to poke around in out of the box. The documentation states it ships with Infinitime but the documentation page for Infinitime is blank.
How do I get started and dig around?
Current equipment FYI: I bought a Raspberry Pi and ST-Link and have both a MacBookPro and an ancient Dell with Linux
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| Interested in learning OS-level programming |
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Posted by: 8453sixtyfour - 08-12-2020, 11:49 AM - Forum: PinePhone Software
- Replies (6)
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Most of my knowledge is in web development, dev-ops, and a fair amount in Linux tooling. One thing I've always wanted to learn was working with OS-level programming, but I've never really had a good excuse to get into it until I got a Pinephone. I've taken a university course where I've written programs in C that do system-level calls, as well as creating some simple ARM assembly code, so I suppose I do have a little experience.
To start simple, if I want to for example create a CLI tool that toggles the flashlight on the Pinephone, what fundamentals should I learn first before going about that? I'd also like to try and make a CLI tool to interface with the modem on the Pinephone just for the learning experience.
The material for OS-level programming feels a bit impenetrable for a noob like me, so maybe you guys have some good suggestions?
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