We're about to turn PinePhone on NuttX into a Feature Phone... But to talk to PinePhone's LTE Modem, we need a NuttX Driver for Allwinner A64 USB Controller.
In this article we’ll dive into PinePhone’s USB Controller… 1. Why PinePhone needs USB for Voice Calls and SMS 2. What’s inside PinePhone’s Allwinner A64 USB Controller 3. Which is actually a Mentor Graphics Inventra USB Controller 4. We’ll study the FreeBSD Driver for the USB Controller 5. And how we might port the USB Driver to NuttX 6. By comparing with the STM32 USB Driver for NuttX https://lupyuen.github.io/articles/usb2 Lup
