Merge pull request #27 from arduino/fix-minimal-doc-can-utils

Fix: add a very minimal README on how to use can-utils …

Author: facchinm

libraries/Arduino_CAN/README.md

@@ -0,0 +1,20 @@
+`Arduino_CAN`
+=============
+### How-to-`SocketCAN`
+* Connect your [SocketCAN](https://en.wikipedia.org/wiki/SocketCAN) capable CAN/USB dongle to the PC and configure it.
+```bash
+sudo ip link set can0 type can bitrate 250000
+sudo ip link set up can0
+```
+* Install can-utils for cansend/candump:
+```bash
+sudo apt-get install can-utils
+```
+* Transmit CAN frames via [`cansend`](https://manpages.ubuntu.com/manpages/lunar/man1/cansend.1.html):
+```bash
+cansend can0 1F334455#1122334455667788
+```
+* Display received CAN frames via [`candump`](https://manpages.ubuntu.com/manpages/lunar/man1/candump.1.html):
+```bash
+candump can0
+```