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Update readme to show output format of /dev/servoblaster.

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Note that they show a value of 1 rather than the expected 0 initially.
This commit is contained in:
Robin Mallinson 2012-11-11 21:02:26 +00:00
parent 8002904e4e
commit b4463ce836
1 changed files with 15 additions and 0 deletions
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15
ServoBlaster/README.txt
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@ -22,6 +22,21 @@ echo 3=120 > /dev/servoblaster
120 is in units of 10us, so that is 1200us, or 1.2ms.
Upon reading, the device file provides feedback as to what position each servo
is currently set. For example, after starting the driver and running the
previous command, you would see:
pi@raspberrypi ~ $ cat /dev/servoblaster
0 1
1 1
2 1
3 120
4 1
5 1
6 1
7 1
pi@raspberrypi ~ $
When the driver is first loaded the GPIO pins are configure to be outputs, and
their pulse widths are set to 0. This is so that servos don't jump to some
arbitrary postion when you load the driver. Once you know where you want your