BeagleBone Black Setup BBB is lovely
The Beaglebone Black is similar to the Raspberry Pi, but with more GPIO and onboard Analogue in (that has a max of 1.8V)
It is highly recommended you setup a KILL SWITCH that will terminate the negative and/or the positive to the SSRs. This is a safety feature and allows you to kill the SSRs without going through the UI
Do not use a kernel above 3.8 at the moment, you may need to install the 3.8 kernel on a newer image:
sudo apt-get install linux-image-3.8.13-bone67
You must set the “Gpio_definitions” property on launch
java -Dgpio_definitions=extras/beaglebone.json -jar Elsinore.jar
Otherwise the system will error
The Pinout number is different between RaspberryPi and Beaglebone.
For Beagleboard Black Pinout: http://elinux.org/BeagleBone#P9_and_P8_-_Each_2x23_pins
BeagleboardBlack has multiple banks, for example GPIO2_2, this translates to physical pin 66, banks are separated by 32 outputs per bank.
For beagleboard to get OneWire support, and GPIO control, you need to install a Device Tree Overlay file. I have added these under the support directory.
The dts file will show you the pin, but it’s
To compile the overlay:
sudo dtc -O dtb -o /lib/firmware/w1-00A0.dtbo -b 0 -@ w1.dts
Or copy the w1-00A0.dtbo in the support directory to /lib/firmware (as root), the above command copies the file for you.
Login as root (such as “sudo su”) and run
echo w1 > /sys/devices/bone_capemgr.8/slots
Note: bone_capemgr.8 may be bone.capemgr.9 depending on your setup
I have also provided a sample jGPIO created overlay for GPIO0_7 as a pinout (jgpio-00A0.dtbo) which can be used in the same was as above
sudo cp extras/jgpio-00A0.dtbo /lib/firmware/
echo jgpio > /sys/devices/bone_capemgr.8/slots
jGPIO is a Java application I made to generate the Device Tree Overlays based on a JSON configuration file. At the time of writing this affects Linux Kernel 3.8 and above. The raspberry Pi doesn’t support Kernel 3.8 yet.
Creating a custom Overlay
If you want to create a DTC file for custom GPIO pinout, you can read the instructions in the jGPIO repository
But the synopsis is
java -cp Elsinore.jar -Dgpio_definition=extras/beaglebone.json jGPIO.DTOTest <List of GPIO pins>
java -cp Elsinore.jar -Dgpio_definition=extras/beaglebone.json jGPIO.DTOTest GPIO0_7
Will recreate the default GPIO0_7 file as jgpio-00A0.dto.
java -cp Elsinore.jar -Dgpio_definition=extras/beaglebone.json jGPIO.DTOTest GPIO0_7 GPIO0_8 GPIO1_12
Will create a Device Tree Overlay with GPIO0_7, GPIO0_8 and GPIO1_12 for export.
You will then need to compile this as the same as above but for jgpio:
sudo dtc -O dtb -o /lib/firmware/jgpio-00A0.dtbo -b 0 -@ jgpio-00A0.dto
This places the compiled file in the /lib/firmware directory.
extra/bbb_setup.sh will always export the jgpio overlay to the cape manager, if there is a firmware file for it.
There is already a precompiled AIN DTO for the Beaglebone Black, BB-ADC, as above:
echo BB-ADC > /sys/devices/bone_capemgr.8/slots
To Activate them.