#PinePhone might become a #LoRa Communicator ... With the LoRa Back Cover and #Meshtastic

Article: https://lupyuen.github.io/articles/usb2?3#appendix-lora-communicator-for-pinephone-on-nuttx

Inside #PinePhone is Quectel EG25-G LTE Modem ... For 4G Voice Calls, SMS, Mobile Data and GPS

Article: https://lupyuen.github.io/articles/usb2?4#quectel-eg25-g-lte-modem

#PinePhone talks to its Quectel EG25-G LTE Modem over USB

Article: https://lupyuen.github.io/articles/usb2?5#lte-modem-talks-usb

Quectel EG25-G LTE Modem connects to #PinePhone over USB ... That's why we need a PinePhone USB Driver for Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/usb2?5#lte-modem-talks-usb

#PinePhone's Allwinner A64 USB Docs are horrigibly lacking ... Thankfully we have the USB Docs by Mentor Graphics

Article: https://lupyuen.github.io/articles/usb2?6#document-the-usb-controller

#PinePhone's USB Controller works like the Mentor Graphics USB Controller ... Except the USB Registers are scrambled (like eggs)

Article: https://lupyuen.github.io/articles/usb2?6#document-the-usb-controller

Finding a Reference Driver for #PinePhone's USB Controller ... With GitHub Code Search

Article: https://lupyuen.github.io/articles/usb2?7#search-for-usb-driver

GitHub Code Search uncovers the FreeBSD Driver for #PinePhone USB Controller

Article: https://lupyuen.github.io/articles/usb2?8#freebsd-usb-driver

Inside the #FreeBSD Driver for #PinePhone USB Controller

Article: https://lupyuen.github.io/articles/usb2?9#inside-the-freebsd-driver

Understanding #PinePhone's USB Controller ... By comparing the #FreeBSD Driver with the Mentor Graphics USB Doc

Article: https://lupyuen.github.io/articles/usb2?9#inside-the-freebsd-driver

What's inside a USB Controller Driver for Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/usb2?10#usb-drivers-in-nuttx

#STM32 USB Driver for Apache #NuttX RTOS ... How it enumerates USB Devices

Article: https://lupyuen.github.io/articles/usb2?11#stm32-usb-driver-for-nuttx

Let's look inside the USB Controller of #PinePhone @PINE64 ... And create a USB Driver for Apache #NuttX RTOS

https://lupyuen.github.io/articles/usb2

@lupyuen Spoke with meshtastic guys at discord - they said that i2c bridge is an issue. Don't know why? I'd like to get my pinephone & lora back cover in use soonest!

@exfil Yep wonder why the I2C Bridge would be a problem, since JF's driver works perfectly fine 🤔

@lupyuen I need to study this. I have LORA cover and Pinephone. My messaging application would benefit hugely if this turns possible.

@exfil I might just port Meshtastic to PinePhone on NuttX ... And prove them wrong 😂

@lupyuen Like that. I need to study that NuttX as well. What is your main motivation of using Nuttx ?

@exfil I think it might be a good educational exercise to document and explain how we build a LoRa Communicator with a real-time OS like NuttX?

Also I have a hunch that a real-time OS might work better for low-level hardware like LoRa Transceivers.

Meshtastic was designed for Arduino, so it would probably be simpler to run on an RTOS.

https://lupyuen.github.io/articles/what

@lupyuen Speaking of FreeBSD drivers…maybe you like this post:
https://freebsdfoundation.org/wp-content/uploads/2021/08/The-Panfrost-Driver.pdf
by https://github.com/bukinr/mdepx