Article: NuttX for PinePhone: Simpler USB with EHCI

["Lee, Lup Yuen" <lu...@appkaki.com>]

Weeks ago we talked about porting NuttX to PinePhone, and how we might turn
it into a Feature Phone.

But to make phone calls and send text messages, we need to control the LTE
Modem over USB. Thus today we’ll build a USB Driver for NuttX on PinePhone…

1. What’s USB Enhanced Host Controller Interface (EHCI)

2. Why it’s simpler than USB On-The-Go (OTG)

3. How we ported the USB EHCI Driver from NuttX to PinePhone

4. Handling USB Clocks and USB Resets on PinePhone (with tips from U-Boot
Bootloader)

5. And the NuttX EHCI Driver boots OK on PinePhone! 🎉

https://lupyuen.github.io/articles/usb3

Lup

Re: Article: NuttX for PinePhone: Simpler USB with EHCI

[Tomek CEDRO <to...@cedro.info>]

On Thu, Mar 23, 2023 at 4:02 PM Lee, Lup Yuen wrote:
> Weeks ago we talked about porting NuttX to PinePhone, and how we might turn
> it into a Feature Phone.
> (..)
> https://lupyuen.github.io/articles/usb3
> Lup

CONGRATZ!! :-)

-- 
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info

Re: Article: NuttX for PinePhone: Simpler USB with EHCI

["Alan C. Assis" <ac...@gmail.com>]

Kudos Lup!!!

Now it is possible to use NuttX on PinePhone for some more practical
application!

BR,

Alan

On 3/23/23, Lee, Lup Yuen <lu...@appkaki.com> wrote:
> Weeks ago we talked about porting NuttX to PinePhone, and how we might turn
> it into a Feature Phone.
>
> But to make phone calls and send text messages, we need to control the LTE
> Modem over USB. Thus today we’ll build a USB Driver for NuttX on PinePhone…
>
> 1. What’s USB Enhanced Host Controller Interface (EHCI)
>
> 2. Why it’s simpler than USB On-The-Go (OTG)
>
> 3. How we ported the USB EHCI Driver from NuttX to PinePhone
>
> 4. Handling USB Clocks and USB Resets on PinePhone (with tips from U-Boot
> Bootloader)
>
> 5. And the NuttX EHCI Driver boots OK on PinePhone! 🎉
>
> https://lupyuen.github.io/articles/usb3
>
> Lup
>