At the Apache Asia Conference "Community Over Code" (19 Aug 2023), I'll talk (remotely) about Apache NuttX Real-Time Operating System (RTOS) for PinePhone. Here are the pre-recorded video and presentation slides...

Video Presentation

PDF Slides with Transcript

Presentation Slides

What's inside a Smartphone? Exploring the internals with Apache NuttX Real-Time Operating System

Smartphones are incredibly complex gadgets. What if we could learn the internals of smartphones... By booting Apache NuttX RTOS (Real-Time Operating System) on our phone?

Over the past year, we have written a series of 24 articles explaining the inner workings of PINE64 PinePhone, and how we implemented the smartphone features with Apache NuttX RTOS.

The articles cover the essential (and esoteric) topics on smartphone technology: MIPI DSI LCD Display, I2C Touch Panel, USB Controller, LTE Modem, Accelerometer / Gyroscope, Arm64 Interrupts and many more.

We are also experimenting with newer, easier ways to create Smartphone Apps, with LVGL Graphics Library, Zig Programming Language, WebAssembly Simulation and Arm64 Emulation.

More about Apache NuttX RTOS for PinePhone

Articles on Apache NuttX RTOS for PinePhone

Apache NuttX RTOS for Star64 64-bit RISC-V SBC (StarFive JH7110)

I have a couple of PINE A64(+) boards and I use the hdmi audio, which works fine. I have script with a pactl command to set the sink automatically and it then works.

I how have several LTS boards, and I can not get any audio/sound (headphone jack or HDMI) to work on the LTS/SOPINE linux version.
I am running Armbian 23.02.2 Buster with Lumix 5.15.93-sunxi64. I run apt update -> upgrade to keep up to date.

I have tried the html sound coming out of my monitor, it doesn't work, but I have ready that its not support in the LTS release.
I have also tried the headphone jack. I test using play and aplay. They both look like they are generating audio, but nothing comes out.

When I try to run pactl, I get:
# pactl info
Connection failure: Connection refused
pa_context_connect() failed: Connection refused


My DTC listing for sound is:
/dts-v1/;

/ {
#address-cells = < 0x01 >;
model = "SoPine with baseboard";
serial-number = "92c0a5baf0f6ec54";
#size-cells = < 0x01 >;
interrupt-parent = < 0x01 >;
compatible = "pine64,sopine-baseboard\0pine64,sopine\0allwinner,sun50i-a64";

sound {
simple-audio-card,name = "sun50i-a64-audio";
#address-cells = < 0x01 >;
simple-audio-card,aux-devs = < 0x12 >;
simple-audio-card,widgets = "Microphone\0Microphone Jack\0Headphone\0Headphone Jack";
simple-audio-card,routing = "Left DAC\0DACL\0Right DAC\0DACR\0Headphone Jack\0HP\0ADCL\0Left ADC\0ADCR\0Right ADC\0MIC2\0Microphone Jack";
#size-cells = < 0x00 >;
compatible = "simple-audio-card";
status = "okay";
phandle = < 0x58 >;

simple-audio-card,dai-link@0 {
mclk-fs = < 0x80 >;
format = "i2s";
frame-master = < 0x13 >;
bitclock-master = < 0x13 >;

cpu {
phandle = < 0x13 >;
sound-dai = < 0x14 >;
};

codec {
phandle = < 0x59 >;
sound-dai = < 0x15 0x00 >;
};
};
};

sound_hdmi {
compatible = "allwinner,sun9i-a80-hdmi-audio\0allwinner,sun50i-a64-hdmi-audio";
status = "okay";
phandle = < 0x5a >;

cpu {
sound-dai = < 0x17 >;
};

codec {
sound-dai = < 0x16 >;
};
};
};


(sorry all the indenting is lost).\\I can post a screen shot of running alsamixer if that helps.

Any recommendations/things to test will be appreciated.

Hi.  How many months did you have to wait to get your pineTime? I am in my second month of waiting. I have tried writing to sales (3 times) and I tried writing to @pine64@fosstodon.org (2 times) but have never had a reply. 

When I ordered on June 24, I got a notice that the device had shipped on June 27. But something went wrong. I put in a support ticket and was told that there was a problem getting the device out of China and that I would hear about a new shipment soon, but I never heard back. When I went back to support, they fobbed me off to sales. When sales never replied, I tried going back to support, but they have stopped responding, too. Should I try and get my money back from my credit card company? Did pine64 go out of business?

Thanks,

Killick

Anybody else having issue that battery seems to run down rapidly, and the "charging. Time to full charge" estimates are really long?

I have a dell tablet with the same plug in charging port. The wall plug in charging chord charges my tablet in about 30 minutes. When I plug the same chord into the pinetab I get a "time to fully charged" estimate of 7 hours or more! My battery is listed as "battery_rk817" I believe.

Anyone else noticed this?

How or where can I remove all the modem firmware from the phone. I know about the exploit in the firmware but that is not my main concern right now. My main goal at this time is to remove all traces and files of the qucell modem and just leave the modem empty. I have other plans for that later. If that modem firmware has dependency issues is there a way to fill those files with empty slots with empty files and garbage to hold up the phone from breaking. Thanks

Hi,

What screws are recommended for assembling the SOQuartz BLADE 3D Print 1U full width server rack?

Does anyone have any screw size/type recommendations for use with the 3D-printable SOQuartz BLADE 1U Rack?

After using towboot & fedora with an nvme drive with dissapointing battery life and no suspend i have decided to have a go at a vanilla manjaro gnome image with u-boot.

I have got Suspend working well, and hibernate also working consistnent sadly without being able to recover the wireless adapter after resuming.

I have worked out from dmesg and journalctl what are normal errors, and have rmmod -f and re added the brcmfmac modules. Sadly though no success.

The relevent error from the device in dmesg and journalctl is 

Good morning,

After months of not looking about the phone I am try to bring it back to life. Hopefully someone has a good idea.

After the last update (KDE Plasma 5.25.80, last year?) the phone is bricked. Seems the UID/display driver is corrupted, plasma was squeezing the entire UID into the ~15-20% of the (top) display. With that nearly impossible to use the phone anymore.

But that is not my topic currently, not possible to start/boot the phone anymore. PPP refused charging the battery, I am using a 2.4A charger. Nothing happened after couple of days. Bought now an external battery charger from Pine, so the battery is fully charged.

Can not start/boot (without or with a SD card), nothing happened. But seems the phone is not completely dead, I can see a white mouse pointer (on a black display) after maybe 10 seconds after I presses the "On"-button. Can move the pointer around but not more.

Any ideas? Many thanks to the community ;-)