SPI in C/C++ and SPIDev-usage

Jonas Hjulstad

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Feb 25, 2019, 1:32:20 PM2/25/19

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Hi!

When i search for documentation on SPI-communication in C/C++ for BeagleBone Black, i get a lot of different solutions to the issue.

Im looking for an up-to-date solution for connecting my Sparkfun LSM9DS1 Breakout to the BBB's SPI pins:

https://learn.sparkfun.com/tutorials/lsm9ds1-breakout-hookup-guide/using-the-arduino-library

I've managed to setup pins through universal-io commands from terminal, and sent a few registers using python and Adafruit BBIO.

I'm new to object-oriented programming, but want to know where the core locations of the SPI bus sits, and the configurations neccessary to configure pins like universal-io does.

Another idea is to redirect the Sparkfun-library to BBB's SPI pins, but i do not know where to find these

I have a decent understanding of the debian file structure, but i do not know where libraries and SPI pin configurations are located

Does anyone have a clue which could lead me in the right direction? All help is appreciated!

Mala Dies

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Feb 28, 2019, 10:34:37 PM2/28/19

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Hello,

I think they are located as spidev or maybe not. Let me take a quick glance of my file system. Please hold.

...

/sys/bus/spi/devices/

This shows some available spi devices.

Seth

Jonas Hjulstad

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Mar 1, 2019, 1:58:58 AM3/1/19

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Thanks for the respons. I managed to find a SPI-Library communicating via the SPIDev buses at DeeplyEmbeddeds websites, which Ill integrate i to the Breakout's Arduino library. Ill post IT here once complete!

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Mala Dies

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Mar 6, 2019, 6:40:45 PM3/6/19

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Okay,

If you need the names of some books that incorporate some Linux Distros on SoC or SiP (BeagleBone stuff) and arduino, let me know. I have some books to mention.

Seth

P.S. They are mostly dedicated to the Pi thing but you can transfer the info. and ideas to the BBB family of computing. I always try to update the books from the past for fun. I update their usage w/ current configurations of the BBB family and Debian. Staying busy is half the battle. Good luck w/ your project. I will wait to see it live in action. Oh and there is a library for SPI from Adafruit, too. See here: https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/spi and https://github.com/adafruit/adafruit-beaglebone-io-python. The second link for github.com has SPI stuff for the BBB is further down on that page.

Mala Dies

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Mar 6, 2019, 6:42:10 PM3/6/19

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Oh and I Almost Forgot,

Hello Again...if you look up adafruit spi beaglebone black on google, there should be some nice adventurous stuff on the page.