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Vibrator
This is in reference to the vibrator in the Neo Freerunner, however it is likely identical to the Neo 1973, as best I can tell.
Controlling
The vibrator is controlled through:
/sys/class/leds/neo1973\:vibrator/brightness
When off, it will read 0. Valid ranges appear to be 0-255, with 255 being the fastest.
Simple Python Script For Playing Beats
Reads beats from a file and plays them on the openmoko vibrator.
File format is human readable text, consisting of a simple sequence of integer pairs. The first number in the pair representing the intensity of the vibration from 0 to 255. The second number represents the duration in milliseconds to hold that intensity. Any non digit characters in the file count as a separators between numbers, but are otherwise ignored.
#!/usr/bin/python
"""Vibrator Beat Player
Usage: python beatplay.py [filename]
"""
import sys
import time
import re
def loadFromTextFile(filename):
infile = open(filename)
contents = infile.read()
return re.findall("(\d+)\D*(\d+)", contents)
def playNote(frequency, duration):
outfile.write(str(frequency) + "\n")
time.sleep(float(duration) / 1000.0)
def playNotes(notes):
for frequency, duration in notes:
#print frequency + ", " + duration
playNote(frequency, duration)
def playFile(filename):
global outfile
notes = loadFromTextFile(filename)
outfile = open("/sys/class/leds/neo1973:vibrator/brightness", "w", 1)
playNotes(notes)
playNote(0, 0)
outfile.close()
if __name__ == "__main__":
playFile(sys.argv[1])
Example Beat
The following is an example "song" file that can be used to test the beat player.
125 400 0 200 250 600 0 400 125 400 0 200 250 600 0 400 125 400 0 200 250 600 0 400 125 400 0 200 250 600 0 400
