50 lines
1001 B
Python
50 lines
1001 B
Python
# check callback feature of the timer class
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import pyb
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from pyb import Timer
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# callback function that disables the callback when called
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def cb1(t):
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print("cb1")
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t.callback(None)
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# callback function that disables the timer when called
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def cb2(t):
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print("cb2")
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t.deinit()
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# callback where cb4 closes over cb3.y
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def cb3(x):
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y = x
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def cb4(t):
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print("cb4", y)
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t.callback(None)
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return cb4
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# create a timer with a callback, using callback(None) to stop
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tim = Timer(1, freq=100, callback=cb1)
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pyb.delay(5)
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print("before cb1")
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pyb.delay(15)
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# create a timer with a callback, using deinit to stop
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tim = Timer(2, freq=100, callback=cb2)
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pyb.delay(5)
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print("before cb2")
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pyb.delay(15)
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# create a timer, then set the freq, then set the callback
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tim = Timer(4)
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tim.init(freq=100)
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tim.callback(cb1)
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pyb.delay(5)
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print("before cb1")
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pyb.delay(15)
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# test callback with a closure
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tim.init(freq=100)
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tim.callback(cb3(3))
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pyb.delay(5)
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print("before cb4")
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pyb.delay(15)
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