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Activities/Turtle Art/Programmable Brick (view source)
Revision as of 21:09, 26 August 2011
, 21:09, 26 August 2011→Sample code
else:
else:
lc.heap.append(0) # no mouse event
lc.heap.append(0) # no mouse event
====Device I/O====
# This Python block returns with the brightness sensor value in the heap
# a range of parameters can be measured, for example, substitute any of
# these strings for the string in the program below.
#
# /sys/devices/platform/olpc-battery.0/power_supply/olpc-battery/current_now
# /sys/devices/platform/olpc-battery.0/power_supply/olpc-battery/voltage_now
# /sys/devices/platform/dcon/backlight/dcon-bl/actual_brightness
def myblock(tw, x): # ignores second argument
import os
# The light sensor is only available on the XO 1.75
device = '/sys/devices/platform/olpc-ols.0/power_state'
if os.path.exists(device):
fh = open(device)
string = fh.read()
fh.close()
tw.lc.heap.append(int(string)) # append as integer value to heap
else:
tw.lc.heap.append(-1)
# If you can work out how to use them...
# accelerometer: /dev/input/event0 ???
# power button: /dev/input/event1
# lid switch: /dev/input/event2
# ebook: /dev/input/event3
# headphone jack: /dev/input/event7
# microphone jack: /dev/input/event8
# rotate, cursor, and game pad keys: /dev/input/event10
===Understanding the structure of the Turtle Art program===
===Understanding the structure of the Turtle Art program===