Lup Yuen Lee 李立源 @lupyuen@qoto.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
Lup Yuen Lee 李立源
boosted
@jarkko @lupyuen It's a dual core 64 bit RISC-V MCU that is surprisingly powerful for what it is. It's also a pain to deal with.
Perhaps Maix is the best way to get into one. I have the Stick V version and the Stamp I think it is called.
In terms of power, I think an NES Emulator was written for it. I believe the RV64GC is an older version than what was standardized on. It's weird and was my first experience with RISC V.
Lup Yuen Lee 李立源
boosted
@lupyuen You can do memory protection also with RISC-V without MMU by configuring so called Physical Memory Protection (PMP) registers in M-mode and running applications in S-mode. So it is memory protection based on physical memory partitioning instead of virtual memory. RISC-V would be a good platform for product low-cost but still quite secure products.
Lup Yuen Lee 李立源
boosted
@lupyuen Perhaps the most important lesson? "It was way harder than I expected." 😆
Lup Yuen Lee 李立源
boosted
@lupyuen I have one SBC for RISC-V (VisionFive2) but would be nice to get one MMUless SBC too (i.e. without S-mode). I.e. kind of RISC-V "arduino".
Can we run JavaScript on Apache #NuttX RTOS? Let's find out with #QuickJS JavaScript Engine!
Article: https://lupyuen.codeberg.page/articles/quickjs.html
#RISCV Bare Metal Programming? Check out "barebox" 👍
Lup Yuen Lee 李立源
boosted
@lupyuen "Valuable" is misleading; "Highest MarketCap" should be the term used.
Banks provide relatively little value, and the high marketcap for them is essentially a reflection of the risk averse mentality among SEA investors.
Bank stocks and real-estate are the preferred investments, because they are "safe". Experienced that first hand, seeking investments for various high tech endeavors 20 years ago, where they asked for "guarantees of 10% annual return" rather than "100x Unicorn Value".
Most Valuable Company in Every Southeast Asian Country
https://www.visualcapitalist.com/mapped-the-most-valuable-company-in-each-southeast-asian-country/
Retro Gaming: #FPGA vs Software Emulation (MiSTer FPGA)
Apache #NuttX RTOS on #RISCV Sophgo SG2000 / Milk-V Duo S ... Our very first Crash Dump! 🎉
Source: https://github.com/lupyuen/nuttx-sg2000#nuttx-crash-dump-on-sg2000
Tiny C Compiler runs in #WebAssembly but it's missing C Header Files ... Let's add the ROM FS Filesystem from Apache #NuttX RTOS ... With a little help from #ZigLang Compiler
256-Core #RISCV Cluster (CH32V003)
"His officers also used novel forensics techniques to extract Kivimäki's Fingerprint from an otherwise anonymous picture he posted under an online pseudonym"
Lup Yuen Lee 李立源
boosted
@lupyuen $300 sounds like a steal!
Monitoring Energy usage with Tasmota smart plugs, Prometheus and Grafana
SpacemiT MuseBook: #RISCV Laptop with Octa-core K1 ($300)
Tiny C Compiler talks to Apache #NuttX Emulator in the Web Browser ... Thanks to JavaScript Local Storage
Article: https://lupyuen.codeberg.page/articles/romfs.html#from-tcc-to-nuttx-emulator
Apache #NuttX RTOS in Flat Mode runs NuttX Apps that are Statically Linked (kinda like an octopus?)
Source: https://github.com/lupyuen/nuttx-rust-app#nuttx-flat-mode-vs-kernel-mode
- 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
