Lup Yuen Lee 李立源 @lupyuen@qoto.org

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

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

Apache #NuttX RTOS, ST7789 Driver and LVGL Library all run OK on #PineDio Stack #BL604 @PINE64 ! 🎉 Let's talk about the SPI Tweaks we made...

https://github.com/lupyuen/pinedio-stack-nuttx

Time to overwrite the Self-Test Firmware on #PineDio Stack #BL604 @PINE64 🥲 ... And venture into Apache #NuttX RTOS

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

Apache #NuttX RTOS might need some SPI Tweaks to run on PineDio Stack #BL604 🤔

https://lupyuen.github.io/articles/st7789?20#shared-spi-bus

What happens when we build #NuttX with newer versions of #LVGL

https://lupyuen.github.io/articles/st7789?19#lvgl-version

How we set the #LVGL Version on Apache #NuttX RTOS

https://lupyuen.github.io/articles/st7789?18#lvgl-version

Rendering #LVGL Widgets on Apache #NuttX RTOS

https://lupyuen.github.io/articles/st7789?17#lvgl-widgets

Here's how we run the #LVGL Demo App on #NuttX RTOS

https://lupyuen.github.io/articles/st7789?16#run-lvgl-demo

How we enable #LVGL Graphics Library and LVGL Demo App on Apache #NuttX RTOS

https://lupyuen.github.io/articles/st7789?15#configure-nuttx