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SPI Output with a Beaglebone

Over at the GigaMegaBlog, they have another fantastic Beaglebone 101 tutorial.  They run through everything you need to know to get SPI output with a Beaglebone.

I’ve been experimenting with SPI and I2C on my Beaglebone lately.  When I first tried using them at the beginning of the year, I found they required a level of Linux Kung Fu that was beyond me.  However, both of these protocols are now supported from “userland” applications  in both Angstrom and Ubuntu.  A Google search turns up plentyofworkingexamples for SPI and I2C on the Beaglebone, along with some more advancedprojects.  I think the water’s safe safe for the rest of us.

I’m going to begin with SPI.  Ultimately I’ll be using a graphical LCD, specifically anAdafruit ST7565-based LCD, but in this article I’m going to use a simpler character LCD backpack, also from Adafruit, that uses the popular and well-documented 74HC595 SPI chip.

Also, be sure to check out their other great Beaglebone 101 tutorials.

From the fine people who have brought us the Beagle Board, we now have a smaller, lighter, but powerful single board linux computer, Beagle Bone!   We like this move to a more compact and integrated SBC. For example, there is onboard Ethernet and USB host, as well as a USB client interface (a FTDI chip for shell access). It even comes preloaded with Angstrom Linux on the 4 GB microSD card!

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