Lup Yuen Lee 李立源 @lupyuen@qoto.org

Optimising my Power Consumption

🤔

Jay Chou loses Bored Ape NFT in phishing theft, scammers sold it for more than US$500,000

https://cnalifestyle.channelnewsasia.com/entertainment/jay-chou-bored-ape-nft-stolen-308766

#RustLang on #ESP32 update

https://mabez.dev/blog/posts/esp-rust-04-04-2022/

"How I hacked an ESA's Experimental Satellite"

https://www.deadf00d.com/post/how-to-hack-an-esa-experimental-satellite.html

#PineTime InfiniTime 1.9.0 Released, Adds New Watchface

https://linuxgamingcentral.com/posts/infinitime_1.9.0_released/

#LVGL Canvas can render fancy graphics on #PineDio Stack #BL604 @PINE64 ! But be careful: It might need a lot of RAM

https://github.com/lupyuen/pinedio-stack-nuttx#lvgl-test-app

Comparing #GoLang vs C in #Embedded applications

https://stackoverflow.blog/2022/04/04/comparing-go-vs-c-in-embedded-applications/

Here's how we render some text on #PineDio Stack #BL604 ... With #LVGL Graphics Library

https://github.com/lupyuen/pinedio-stack-nuttx#lvgl-test-app

#LoRaWAN works OK on #PineDio Stack #BL604 ... With Apache #NuttX RTOS! 🎉

https://github.com/lupyuen/pinedio-stack-nuttx#test-lorawan

Will ST7789 Display play nice with LoRa SX1262 on #PineDio Stack #BL604? Yep SX1262 works OK on the Shared SPI Bus!

https://github.com/lupyuen/pinedio-stack-nuttx#test-shared-spi-bus

#BL602 talks to ST7789 Display at SPI Mode 1 or 3 ... Depends whether MISO / MOSI are swapped

https://github.com/lupyuen/pinedio-stack-nuttx#spi-mode

#NuttX RTOS uses MISO as the ST7789 Data / Command Pin ... But ST7789 is wired "backwards" on #PineDio Stack #BL604! We use MOSI as the ST7789 Data / Command Pin instead

https://github.com/lupyuen/pinedio-stack-nuttx#spi-command--data

At #NuttX Startup, we deselect all SPI Devices ... By flipping their Chip Select Pins to High

https://github.com/lupyuen/pinedio-stack-nuttx#deselect-all-spi-devices

#BL602 #NuttX SPI Driver looks up the SPI Device Table to 1️⃣ Swap MISO and MOSI Pins 2️⃣ Flip the Chip Select Pins

https://github.com/lupyuen/pinedio-stack-nuttx#select--deselect-spi-device

Teriyaki Chicken Soba

Here's how we created the SPI Device Table in #NuttX RTOS ... That lists all SPI Devices on #PineDio Stack #BL604

https://github.com/lupyuen/pinedio-stack-nuttx#spi-device-table

ST7789 Display is wired "backwards" on #PineDio Stack #BL604 ... We fix this by swapping the MISO / MOSI Pins in the #NuttX SPI Driver

https://github.com/lupyuen/pinedio-stack-nuttx#swap-miso--mosi

Wordle is NP-hard

https://arxiv.org/abs/2203.16713

We create an SPI Device Table in #NuttX that defines each device wired to the SPI Bus ... NuttX SPI Driver will use this table to control the SPI Bus

https://github.com/lupyuen/pinedio-stack-nuttx#shared-spi-bus

SPI Bus on #PineDio Stack #BL604 is wired to 3 devices: 1️⃣ ST7789 Display 2️⃣ LoRa SX1262 3️⃣ SPI Flash ... Each with its own Chip Select Pin ... Let's tweak #NuttX RTOS to support this

https://github.com/lupyuen/pinedio-stack-nuttx#shared-spi-bus