Lup Yuen Lee 李立源 @lupyuen@qoto.org

How SX1262 #LoRa Transceiver is wired up on #PineDio Stack BL604

https://lupyuen.github.io/articles/spi2?29#pin-definitions

Testing Apache #NuttX OS on #PineDio Stack BL604 @PINE64

https://lupyuen.github.io/articles/spi2?28#test-with-pinedio-stack

#BL602 #NuttX tested OK with Semtech SX1262

https://lupyuen.github.io/articles/spi2?27#test-sx1262

How we connect Semtech SX1262 to #BL602 and #ESP32

https://lupyuen.github.io/articles/spi2?26#connect-sx1262

Testing #NuttX on #BL602 and #ESP32 with Semtech SX1262

https://lupyuen.github.io/articles/spi2?25#test-with-semtech-sx1262

Controlling SPI Chip Select with GPIO Output on #NuttX

https://lupyuen.github.io/articles/spi2?24#gpio-output-as-chip-select

Here's why we control SPI Chip Select ourselves on #NuttX

https://lupyuen.github.io/articles/spi2?23#control-chip-select-with-gpio

How we test #NuttX SPI with a Logic Analyser

https://lupyuen.github.io/articles/spi2?22#test-with-logic-analyser

Running our #NuttX App to transmit and receive data over SPI

https://lupyuen.github.io/articles/spi2?21#run-the-spi-test-app

How our #NuttX App transfers data over SPI

https://lupyuen.github.io/articles/spi2?20#inside-the-spi-test-app

Checking that our SPI Test Driver has been loaded in #NuttX

https://lupyuen.github.io/articles/spi2?19#load-the-spi-test-driver

Here's how we load our SPI Test Driver in #NuttX

https://lupyuen.github.io/articles/spi2?18#load-the-spi-test-driver

How we configure the SPI port in #NuttX

https://lupyuen.github.io/articles/spi2?17#configure-spi

Here's how we transfer data over SPI in #NuttX

https://lupyuen.github.io/articles/spi2?15#write-operation

Every #NuttX Device Driver defines a list of File Operations ... Here are the operations for our SPI Test Driver

https://lupyuen.github.io/articles/spi2?12#file-operations

What's inside our SPI Test Driver for #NuttX

https://lupyuen.github.io/articles/spi2?11#inside-the-spi-test-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

Our Custom Device Driver appears as "/dev/spitest0" in #NuttX

https://lupyuen.github.io/articles/spi2?9#verify-device-driver

During #NuttX Startup, we register our Device Driver

https://lupyuen.github.io/articles/spi2?8#register-device-driver

We enable SPI Logging in #NuttX ... For easier troubleshooting

https://lupyuen.github.io/articles/spi2?7#enable-logging