BBB Clock Beaglebone Black 7 Segment Display Clock with TL5947 SPI PWM LED Drivers To Compile: make clock Testing Walk the digits displaying numbers 0-9 for d in {0..3} ; do for i in {0..9} ; do ./clock -d $d -v $i -g 1000; sleep 1; done; done Walk the segments, displaying 1 segment at a time