Lup Yuen Lee 李立源

Let's port to Apache OS the driver for Semtech SX1262 Transceiver

github.com/lupyuen/lora-sx1262

1
Lup Yuen Lee 李立源

We take this SX1262 Driver for Linux and BL602 IoT SDK ... And tweak it for OS

github.com/lupyuen/lora-sx1262

1
Lup Yuen Lee 李立源

Yesterday we created an empty Library for SX1262 ... Today we fill in the SX1262 Driver Code

qoto.org/@lupyuen/107451151962

1
Lup Yuen Lee 李立源

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

github.com/lupyuen/lora-sx1262

1
Lup Yuen Lee 李立源

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

github.com/lupyuen/lora-sx1262

1
Lup Yuen Lee 李立源

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

github.com/lupyuen/incubator-n

1
Lup Yuen Lee 李立源

Yep our SX1262 Library reads the SX1262 Registers correctly! 🎉

gist.github.com/lupyuen/1e732f

1
Lup Yuen Lee 李立源

Now we transmit a Message with our SX1262 Library

github.com/lupyuen/incubator-n

1
Lup Yuen Lee 李立源

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

github.com/lupyuen/lora-sx1262

airspy.com/airspy-r2/

1
Lup Yuen Lee 李立源
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SDR shows the Chirp transmitted by our SX1262 Library 🎉 ... Let's inspect the message with a LoRa Receiver

gist.github.com/lupyuen/5fdede

· · Tusky · 1 · 0 · 1
Lup Yuen Lee 李立源

Let's use WisBlock to inspect the Message transmitted by our SX1262 Library

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

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

gist.github.com/lupyuen/5fdede

1
Lup Yuen Lee 李立源

Now our SX1262 Library shall receive a Message ... Transmitted by WisBlock

github.com/lupyuen/wisblock-lo

1
Lup Yuen Lee 李立源

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

github.com/lupyuen/incubator-n

1
Lup Yuen Lee 李立源

Our SX1262 Library correctly receives the Message transmitted by WisBlock! 🎉

gist.github.com/lupyuen/0d78b1

1
Lup Yuen Lee 李立源

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

github.com/lupyuen/lora-sx1262

1
Lup Yuen Lee 李立源

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

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

We port the SX1262 Driver to OS ... In small steps

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

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

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

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

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

Here's how we create a Library in OS

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

Adding our Library to the Makefiles and Kconfig

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

Testing our Library on Apache OS

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

How SX1262 is wired up on Stack BL604 ... And how we configure the pins on Apache OS

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

What are DIO1, BUSY and NRESET Pins on SX1262 ... Nope we're not using them on OS yet

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

How we call our Library ... To read the SX1262 Registers

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

Building our Firmware for SX1262

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

Yep our Library reads the SX1262 Registers OK! 🎉

lupyuen.github.io/articles/sx1

1
Lup Yuen Lee 李立源

Our Library has layers ... Like Shrek 😂

lupyuen.github.io/articles/sx1

1
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