New hardware revision decode
authorGuy McSwain <guy.mcswain@gmail.com>
Fri, 17 Jan 2020 15:23:58 +0000 (09:23 -0600)
committerGuy McSwain <guy.mcswain@gmail.com>
Sat, 18 Jan 2020 16:06:49 +0000 (10:06 -0600)
commit714136afe45635c37b0eb45986d261c644810aa5
tree25d9a194748d74f9dd689a2cbd380a2b25b43693
parent5c1f52215d083830802eff439e1f23d6c0c02651
New hardware revision decode

Decode hardware revision from either:
1) 'revision' string in /proc/cpuinfo (legacy)
2) binary number in /proc/device-tree/system/linux,revision

The second path is recommended by raspberrypi.org for newer
operating systems.  See raspberrypi/linux#2110
pigpio.c
pigpio.h