Lup Yuen Lee 李立源 @lupyuen@qoto.org

#PinePhone Framebuffer: 720 x 1440, 4 bytes per pixel (ARGB 8888)

Article: https://lupyuen.github.io/articles/de2?2#graphics-framebuffer

Building a #PinePhone Display Engine Driver in #ZigLang for Apache #NuttX RTOS ... All shall be explained in this article

Article: https://lupyuen.github.io/articles/de2?1

We might have created an "Executable Specification" for #PinePhone's Hardware ... Someday we can make a PinePhone Emulator in FPGA! 🤔

Source: https://github.com/lupyuen/pinephone-nuttx/blob/main/render.zig#L322-L353

#ZigLang's Compile-Time Asserts are super helpful ... For checking that #NuttX Framebuffers are defined correctly for #PinePhone 👍

Source: https://github.com/lupyuen/pinephone-nuttx/blob/main/render.zig#L57-L76

#PinePhone's Init Sequence for Allwinner A64 Display Engine ... Now fully documented and ready to implement for Apache #NuttX RTOS 🎉

Source: https://lupyuen.github.io/articles/de?2#appendix-initialising-the-allwinner-a64-display-engine

Fancy modules for #PinePhone's Allwinner A64 Display Engine

Source: https://lupyuen.github.io/articles/de?1#appendix-initialising-the-allwinner-a64-display-engine

Watchmen at the Public Library

Slowly documenting the Init Sequence for #PinePhone's Allwinner A64 Display Engine

Source: https://lupyuen.github.io/articles/de#appendix-initialising-the-allwinner-a64-display-engine

Python Crossing ... No more night walks ew 😲

Plenty to document for #PinePhone's Allwinner A64 Display Engine ... While we're building the #NuttX Driver in #ZigLang 🤔

Source: https://github.com/lupyuen/pinephone-nuttx/blob/main/render.zig#L527-L568

#ZigLang renders graphics with #PinePhone's Allwinner A64 Display Engine ... On Apache #NuttX RTOS 🎉

Source: https://github.com/lupyuen/pinephone-nuttx/blob/main/render.zig#L53-L162

Now porting #PinePhone's Allwinner A64 Display Engine to Apache #NuttX RTOS ... With a little help from #ZigLang 👍

https://github.com/lupyuen/pinephone-nuttx/blob/main/render.zig#L312-L380

Apache #NuttX RTOS coming soon to #RISCV BL808 👍

https://twitter.com/btashton/status/1586381334439923713?t=w5xRRUR74HGK2O1Zg_aFyw&s=19

Here's how we program #PinePhone's Allwinner A64 Display Engine to render 3 Framebuffers

https://lupyuen.github.io/articles/de?15#appendix-programming-the-allwinner-a64-display-engine

Overview of #PinePhone's Allwinner A64 Display Engine

https://lupyuen.github.io/articles/de?12#appendix-overview-of-allwinner-a64-display-engine

Now that we understand #PinePhone's A64 Display Engine ... Here's how we'll create the PinePhone Display Driver for Apache #NuttX RTOS

https://lupyuen.github.io/articles/de?11#nuttx-display-driver-for-pinephone

#PinePhone's p-boot Bootloader is super helpful for deciphering the Allwinner A64 Display Engine

https://lupyuen.github.io/articles/de?10#p-boot-display-code

Here's how we test #PinePhone's A64 Display Engine ... By booting Apache #NuttX RTOS on microSD

https://lupyuen.github.io/articles/de?9#test-pinephone-display-engine

#PinePhone's A64 Display Engine supports blending of 3 Framebuffers ... Let's render all 3 Framebuffers

https://lupyuen.github.io/articles/de?8#render-circle-overlay

#PinePhone's A64 Display Engine can render Framebuffers as Overlays ... Let's render a Square Overlay

https://lupyuen.github.io/articles/de?7#render-square-overlay