Lup Yuen Lee 李立源 @lupyuen@qoto.org

#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

Creating our own Display Driver is best way to understand #PinePhone's internals

Article: https://lupyuen.github.io/articles/dsi3?18#why-zig

#PinePhone on #NuttX shows Garbled Console Output ... Here's the fix

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

We're Reverse-Engineering #PinePhone into #ZigLang ... Here's why

Article: https://lupyuen.github.io/articles/dsi3?18#why-zig

#PinePhone's Power Mgmt IC ... Now deciphered 👍

Article: https://lupyuen.github.io/articles/de?88#appendix-power-management-integrated-circuit

Switching from Nescafe to Indocafe

#PinePhone's Display Backlight is controlled by GPIO and PWM

Article: https://lupyuen.github.io/articles/dsi3?15#display-backlight

Sandwich Experiment ... Egg + Onion + Potato Salad

#PinePhone's A64 Display Engine streams the pixels from RAM Framebuffers ... To the Timing Controller TCON0

Article: https://lupyuen.github.io/articles/dsi3?12#display-engine