Lup Yuen Lee 李立源 @lupyuen@qoto.org

#BL602 talks to ST7789 only in SPI Mode 3 ... Wonder why 🤔

https://lupyuen.github.io/articles/st7789?5#spi-mode-3

How we fixed SPI Send on #BL602 #NuttX

https://lupyuen.github.io/articles/st7789?4#fix-spi-send

Demystifying Software Release Note Issues on GitHub

https://arxiv.org/abs/2203.15592

"How did a hacker steal over $600 million from a crypto gaming blockchain?" (Ronin)

https://arstechnica.com/gaming/2022/03/how-did-a-hacker-steal-over-600-million-from-a-crypto-gaming-blockchain/

#NuttX RTOS controls ST7789's Data / Command Pin through the SPI Driver

https://lupyuen.github.io/articles/st7789?3#st7789-data--command-pin

Here's how we connect ST7789 Display to #BL602 and #ESP32-C3

https://lupyuen.github.io/articles/st7789?2#connect-st7789-display

Source Code: https://codeberg.org/JF002/pinedio-stack-selftest

Self-Test Firmware preloaded on "chonky watch" #PineDio Stack #BL604 @PINE64 ... Awesome work by @JF ! 👏

https://youtu.be/hhaYwvDO0Oc

We also patched #ESP32-C3 #NuttX so that it works with all LCD Drivers that use Data / Command Pins 👍

https://github.com/apache/incubator-nuttx/pull/5908

Debugging #RISCV #BL702

https://simplycreate.online/bl702/2022/03/17/debug-bl702.html

Our flipping of ST7789 Data / Command Pin has been merged into #BL602 #NuttX 👍

https://github.com/apache/incubator-nuttx/pull/5898

@hans Ah but what kind of permissions would we need for an embedded OS? Are we preventing someone from using the ST7789 display? Or stopping someone from controlling the ST7789 display over the network?

@hans Well we don't have enough CPU and RAM to handle permissions on microcontrollers. There's locking to prevent concurrent access to microcontroller resources (like the SPI bus)

Hackaday Challenge: "minimizing the costs around building and installing clean energy solutions"

https://prize.supplyframe.com/?mc_cid=4ce85dc2f1&mc_eid=fad9e1345f

Blockchain project Ronin hit by $615 million crypto heist

https://www.channelnewsasia.com/business/blockchain-project-ronin-hit-615-million-crypto-heist-2594381

"The weird world of non-C Operating Systems"

https://www.theregister.com/2022/03/29/non_c_operating_systems/

@hans NuttX is an embedded operating system for microcontrollers, so no permissions needed

https://nuttx.apache.org/docs/latest/

"GPT-3 can run code"

https://mayt.substack.com/p/gpt-3-can-run-code?s=r

Computer Science Curriculum with #RustLang

https://github.com/AbdesamedBendjeddou/Rusty-CS

Apache #NuttX RTOS renders graphics on ST7789 Display with #LVGL Library ... All shall be explained in this article

https://lupyuen.github.io/articles/st7789?1