Commit fa2e701e authored by Damien George's avatar Damien George
Browse files

examples, SDdatalogger: Add more comments; reduce power consumption.

parent 2a5b3cdf
......@@ -8,17 +8,18 @@
import pyb
pyb.LED(3).on()
pyb.delay(2000)
pyb.LED(4).on()
pyb.LED(3).off()
switch = pyb.Switch() # check if switch was pressed decision phase
pyb.LED(3).on() # indicate we are waiting for switch press
pyb.delay(2000) # wait for user to maybe press the switch
switch_value = pyb.Switch()() # sample the switch at end of delay
pyb.LED(3).off() # indicate that we finished waiting for the switch
if switch():
pyb.LED(4).on() # indicate that we are selecting the mode
if switch_value:
pyb.usb_mode('CDC+MSC')
pyb.main('cardreader.py') # if switch was pressed, run this
else:
pyb.usb_mode('CDC+HID')
pyb.main('datalogger.py') # if switch wasn't pressed, run this
pyb.LED(4).off()
pyb.LED(4).off() # indicate that we finished selecting the mode
......@@ -11,6 +11,10 @@ switch = pyb.Switch()
# loop
while True:
# wait for interrupt
# this reduces power consumption while waiting for switch press
pyb.wfi()
# start if switch is pressed
if switch():
pyb.delay(200) # delay avoids detection of multiple presses
......
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