Beaglebone Industrial Comms Cape#
For industrial communication applications. Provides an array of communication protocols including one RS485, one CAN, two analog 4–20 mA current loops, and two 3A 50V interfaces allowing the control of high current loads.
Note
This cape also boasts compatiblity with the BeagleV-Fire. Documentation for it’s setup can be found at Comms Cape Gateware for BeagleV-Fire.
Electrical Specifications#
CAN: SN65HVD230 datasheet
2x 4-20mA current loop inputs
2x 3A 50V sinks for high-current loads
Mechanical Specifications#
Feature |
Specification |
|---|---|
Layers |
2 |
PCB Thickness |
0.062” |
RoHS Compliant |
Yes |
Documentation#
Feature |
Availability |
|---|---|
Open Source |
Yes |
System Reference Manual |
Not yet |
Schematics |
PDF, EAGLE |
PCB Files |
PDF, EAGLE |
Gerber Files |
Not yet |
Bills of Materials |
Not yet |
Test Code#
# For the RS485, you just need
config-pin p9.11 uart
config-pin p9.13 uart
# and then use /dev/ttyS4
# For the CAN, you just need
config-pin p9.24 can
config-pin p9.26 can
# and then you can use something like
# https://openbeagle.org/-/snippets/15 ,
# but replace can0 with can1
# For the 4-20mA loop, the ADC overlay should already be loaded and you can
cat /sys/bus/iio/devices/iio:device0/in_voltage5_raw
cat /sys/bus/iio/devices/iio:device0/in_voltage6_raw
# but you'll need to do the voltage to data conversion
# For the sink drivers, you can do:
# Sink A
config-pin p9.15 gpio
echo out > /sys/class/gpio/gpio48/direction
echo 1 > /sys/class/gpio/gpio48/value
# Sink B
config-pin p9.23 gpio
echo out > /sys/class/gpio/gpio49/direction
echo 1 > /sys/class/gpio/gpio49/value
# and that should turn them on.