Lup Yuen Lee 李立源 @lupyuen@social.cleverlibre.org
- Pronouns/Gender/Sexuality
- He/Him/They, Bisexual/Asexual 🇸🇬
- Date of Birth
- 1969
- Articles
- https://lupyuen.codeberg.page
IoT Techie and Educator / Apache NuttX PMC
Joined Jan 2020
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
@Rog@mastodon.radio Would be so cool if students someday could turn NuttX on PinePhone into a Daily Driver 🤔
@Rog@mastodon.radio We're still working on that ... Right now NuttX on PinePhone is more "Educational" than "Daily Driver"
Lup Yuen Lee 李立源
boosted
@lupyuen I think Pine64 mentioned on Twitter in the comments of their announcement of it that it wouldn’t have spi (or at least, currently they don’t plan for it to.)
Interesting comments on Apache #NuttX RTOS
#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
Pre-defined C/C++ Compiler Macros
USB-C Power Issues with Development Boards (Nezha / BL706 / CH32V307)
https://www.robertlipe.com/usb-c-power-issues-with-development-boards/
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 🎉
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
Lup Yuen Lee 李立源
boosted
@robertlipe @lupyuen seems their bootloader source isn’t available tho?
Lup Yuen Lee 李立源
boosted
@lupyuen Impressive. I have No Idea how I'd look at a stream of bits and deduce that clock recovery (ala Manchester) is missing and know to add it like he does in https://gitlab.com/oliv4945/rika-temperature-sensor-encoding/-/blob/main/rika_payload_helpers.h#L13. That's experience at work!
Instructional read with a bonus link to a RP2040 analyzer https://github.com/gusmanb/logicanalyzer, but I think I'll save my pennies for Sipeed's promised Bl808 (TH1520?) analyzer. Because, you know, #Team_RISC-V! 🙂
Lup Yuen Lee 李立源
boosted
My new article on the @Risc-V boards from Sipeed. The M1S Dock ($10 and up) and M0Sense ($4 & up) are powerful, expandable, programmable devices that are shipping now.
https://www.robertlipe.com/sipeed-m1s-dock-and-m0-sense-have-landed/
Also recently, my notes on the BL808 processor used in M1S Dock:
https://www.robertlipe.com/bl808-not-symmetric/
P.S. to @lupyuen : they have sensible bootloaders. Only if you clobber them do you have to mess with BLCube and friends!
#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
- Pronouns/Gender/Sexuality
- He/Him/They, Bisexual/Asexual 🇸🇬
- Date of Birth
- 1969
- Articles
- https://lupyuen.codeberg.page
IoT Techie and Educator / Apache NuttX PMC
Joined Jan 2020
