Here are the #NuttX Pin Definitions for PineDio Stack BL604 with onboard SX1262 ... As derived from the schematic
Our #NuttX App runs OK on PineDio Stack BL604 with onboard SX1262! 🎉
https://github.com/lupyuen/incubator-nuttx-apps/blob/spi_test/examples/spi_test2/spi_test2_main.c
How we transmit and receive data over SPI on Apache #NuttX OS ... And what's inside the SPI Driver ... All shall be explained here
Calling the SPI Driver in Apache #NuttX OS
To test the #NuttX SPI Functions, we create an App and a Device Driver
https://lupyuen.github.io/articles/spi2?3#spi-test-app-and-driver
#NuttX Apps can't call the SPI Driver directly ... Here's why
https://lupyuen.github.io/articles/spi2?3#spi-test-app-and-driver
Here's how we create a #NuttX App
https://lupyuen.github.io/articles/spi2?4#appendix-create-a-nuttx-app
How we create a Device Driver in #NuttX ... The copy-n-paste way
https://lupyuen.github.io/articles/spi2?5#appendix-create-a-nuttx-device-driver
Enabling the SPI Driver in #NuttX
We enable SPI Logging in #NuttX ... For easier troubleshooting
During #NuttX Startup, we register our Device Driver
https://lupyuen.github.io/articles/spi2?8#register-device-driver
Our Custom Device Driver appears as "/dev/spitest0" in #NuttX
https://lupyuen.github.io/articles/spi2?9#verify-device-driver
Why we chose to clone the "dat-31r5-sp" driver in #NuttX ... Yep we did a Quantitative Analysis of NuttX Drivers!
https://lupyuen.github.io/articles/spi2?10#verify-device-driver
What's inside our SPI Test Driver for #NuttX
https://lupyuen.github.io/articles/spi2?11#inside-the-spi-test-driver
Every #NuttX Device Driver defines a list of File Operations ... Here are the operations for our SPI Test Driver
Here's how we transfer data over SPI in #NuttX
How we configure the SPI port in #NuttX
Here's how we load our SPI Test Driver in #NuttX
https://lupyuen.github.io/articles/spi2?18#load-the-spi-test-driver
Checking that our SPI Test Driver has been loaded in #NuttX
https://lupyuen.github.io/articles/spi2?19#load-the-spi-test-driver
How our #NuttX App transfers data over SPI
https://lupyuen.github.io/articles/spi2?20#inside-the-spi-test-app
Running our #NuttX App to transmit and receive data over SPI
https://lupyuen.github.io/articles/spi2?21#run-the-spi-test-app
How we test #NuttX SPI with a Logic Analyser
https://lupyuen.github.io/articles/spi2?22#test-with-logic-analyser
Here's why we control SPI Chip Select ourselves on #NuttX
https://lupyuen.github.io/articles/spi2?23#control-chip-select-with-gpio
Controlling SPI Chip Select with GPIO Output on #NuttX
https://lupyuen.github.io/articles/spi2?24#gpio-output-as-chip-select
Testing #NuttX on #BL602 and #ESP32 with Semtech SX1262
https://lupyuen.github.io/articles/spi2?25#test-with-semtech-sx1262
Testing Apache #NuttX OS on #PineDio Stack BL604 @PINE64
https://lupyuen.github.io/articles/spi2?28#test-with-pinedio-stack
Yep Apache #NuttX OS works great on #PineDio Stack BL604! 🎉
https://lupyuen.github.io/articles/spi2?30#run-nuttx-on-pinedio-stack
#BL602's SPI Mode has an odd quirk ... Here's the workaround for #NuttX OS
https://lupyuen.github.io/articles/spi2?31#appendix-spi-mode-quirk
Be careful with SPI Chip Select! 🙏
What's inside the SPI Interface on #NuttX OS
https://lupyuen.github.io/articles/spi2?34#appendix-nuttx-spi-interface
#BL602 MISO and MOSI are swapped ... Will submit a PR for #NuttX OS 👍
https://lupyuen.github.io/articles/spi2?32#appendix-miso-and-mosi-are-swapped
