Here's how we init the SPI Bus and SPI Chip Select (GPIO Output) ... In our #NuttX SX1262 Library

https://github.com/lupyuen/lora-sx1262/blob/nuttx/src/sx126x-nuttx.c#L663-L675

Our #NuttX SX1262 Library calls the SPI Test Driver to transfer data over SPI

https://github.com/lupyuen/lora-sx1262/blob/nuttx/src/sx126x-nuttx.c#L677-L703

Let's read some SX1262 Registers ... With our SX1262 Library for #NuttX OS

https://github.com/lupyuen/incubator-nuttx-apps/blob/sx1262/examples/sx1262_test/sx1262_test_main.c#L155-L171

Yep our #NuttX SX1262 Library reads the SX1262 Registers correctly! 🎉

https://gist.github.com/lupyuen/1e732f5b1e0e4a80d1eb351ab3aadede

Now we transmit a #LoRa Message with our #NuttX SX1262 Library

https://github.com/lupyuen/incubator-nuttx-apps/blob/sx1262/examples/sx1262_test/sx1262_test_main.c#L237-L253

Our #NuttX SX1262 Library transmits a #LoRa Message ... We sniff the message with Airspy R2 SDR

https://github.com/lupyuen/lora-sx1262/tree/nuttx

https://airspy.com/airspy-r2/

SDR shows the #LoRa Chirp transmitted by our #NuttX SX1262 Library 🎉 ... Let's inspect the message with a LoRa Receiver

https://gist.github.com/lupyuen/5fdede131ad0e327478994872f190668

Let's use #RAKwireless WisBlock to inspect the #LoRa Message transmitted by our #NuttX SX1262 Library

https://github.com/lupyuen/wisblock-lora-receiver

#LoRa Message transmitted by our #NuttX SX1262 Library ... Received OK by RAKwireless WisBlock! 🎉

https://gist.github.com/lupyuen/5fdede131ad0e327478994872f190668

Now our #NuttX SX1262 Library shall receive a #LoRa Message ... Transmitted by #RAKwireless WisBlock

https://github.com/lupyuen/wisblock-lora-transmitter

Here's how we receive #LoRa Messages with our #NuttX SX1262 Library ... Eventually this will be triggered by GPIO Interrupt (instead of polling)

https://github.com/lupyuen/incubator-nuttx-apps/blob/sx1262/examples/sx1262_test/sx1262_test_main.c#L123-L262

Our #NuttX SX1262 Library correctly receives the #LoRa Message transmitted by #RAKwireless WisBlock! 🎉

https://gist.github.com/lupyuen/0d78b13871fca41ac6d812407890b29b

Our plain and simple #NuttX #LoRa SX1262 Library is (nearly) done! Porting the library from Linux to NuttX wasn't so hard ... Moving on to LoRaWAN real soon!

https://github.com/lupyuen/lora-sx1262/tree/nuttx

Porting the #LoRa SX1262 Driver from Linux to Apache #NuttX OS ... All shall be explained in this article

https://lupyuen.github.io/articles/sx1262?1

We port the #LoRa SX1262 Driver to #NuttX OS ... In small steps

https://lupyuen.github.io/articles/sx1262?2#small-steps

Why #LoRaWAN is so complex ... And why we should stick to the official Semtech Drivers for LoRa and LoRaWAN

https://lupyuen.github.io/articles/sx1262?3#lorawan-support

#NuttX Libraries vs Drivers ... Libraries are easier to code and troubleshoot

https://lupyuen.github.io/articles/sx1262?4#library-vs-driver

Here's how we create a Library in #NuttX OS

https://lupyuen.github.io/articles/sx1262?5#appendix-create-a-nuttx-library