Lup Yuen Lee 李立源 @lupyuen@qoto.org

Apache #NuttX RTOS for #PinePhone ... Now boots to Test Pattern! 🎉

Article: https://lupyuen.github.io/articles/de3

Here's why #NuttX Drivers should call up_mdelay() instead of sleep() ... And #PinePhone is the fastest NuttX Device ever!

Article: https://lupyuen.github.io/articles/de3?8#appendix-calibrate-nuttx-delay

Up Next: #NuttX Drivers for #PinePhone's LCD Panel and Power Mgmt IC

Article: https://lupyuen.github.io/articles/de3?8#upcoming-drivers

Our #NuttX Display Driver for #PinePhone is nearly complete! Just a few bits of Zig code to port over

Article: https://lupyuen.github.io/articles/de3?7#complete-display-driver

Interesting comments on Apache #NuttX RTOS

Source: https://news.ycombinator.com/item?id=34100614

#PinePhone won't render pixels correctly unless we use Arm64 DMB Barrier ... Not sure why 🤔

Article: https://lupyuen.github.io/articles/de3?6#test-pattern

Let's draw a Test Pattern in our #NuttX Framebuffers for #PinePhone

Article: https://lupyuen.github.io/articles/de3?6#test-pattern

Rendering Framebuffers with the #NuttX Driver for A64 Display Engine on #PinePhone

Article: https://lupyuen.github.io/articles/de3?5#render-framebuffers

#PinePhone and #NuttX on Hacker News 🎉

Source: https://news.ycombinator.com/item?id=34100614

Here's how we define the #NuttX Framebuffers for #PinePhone A64 Display Engine

Article: https://lupyuen.github.io/articles/de3?4#nuttx-framebuffer

Let's render 3 Framebuffers with #PinePhone's A64 Display Engine

Article: https://lupyuen.github.io/articles/de3?3#ui-channels

#PinePhone's A64 Display Engine 1️⃣ Reads pixels from Multiple Framebuffers 2️⃣ Blends the pixels into a Single Image 3️⃣ Pushes the image to the LCD Display

Article: https://lupyuen.github.io/articles/de3?2#allwinner-a64-display-engine

#PinePhone's A64 Display Engine is now supported in Apache #NuttX Kernel ... How will it be called by our PinePhone Display Driver? All shall be explained in this article

Article: https://lupyuen.github.io/articles/de3?1

Apache #NuttX Kernel now supports #PinePhone's A64 Display Engine! 🎉 ... Up Next: NuttX Driver for A64 Reduced Serial Bus (which controls PinePhone's Power Mgmt IC)

Source: https://github.com/apache/nuttx/pull/7944

#PinePhone's A64 Reduced Serial Bus for Power Mgmt IC ... Now deciphered

Article: https://lupyuen.github.io/articles/de#appendix-reduced-serial-bus

Apache #NuttX Kernel Driver for #PinePhone Display Engine @PINE64 ... Looking great! 👍

Source: https://github.com/lupyuen/pinephone-nuttx#test-display-engine-driver-for-nuttx-kernel

Apache #NuttX Kernel now supports #PinePhone Timing Controller TCON0 ... One step closer to a complete Display Driver! 🎉

Source: https://github.com/apache/nuttx/pull/7919

Chasing the printf() Call Chain in Apache #NuttX RTOS

Source: https://github.com/lupyuen/pinephone-nuttx#garbled-console-output

Apache #NuttX RTOS locks the Console Output Stream with a Mutex

Source: https://github.com/lupyuen/pinephone-nuttx#garbled-console-output

Now adding #PinePhone Timing Controller and Display Engine to Apache #NuttX Kernel

Article: https://lupyuen.github.io/articles/dsi3?19#whats-next