micropython: add micropython component

components/language/micropython/tests/pyb/timer_callback.py

@@ -0,0 +1,54 @@
+# check callback feature of the timer class
+
+import pyb
+from pyb import Timer
+
+# callback function that disables the callback when called
+def cb1(t):
+    print("cb1")
+    t.callback(None)
+
+
+# callback function that disables the timer when called
+def cb2(t):
+    print("cb2")
+    t.deinit()
+
+
+# callback where cb4 closes over cb3.y
+def cb3(x):
+    y = x
+
+    def cb4(t):
+        print("cb4", y)
+        t.callback(None)
+
+    return cb4
+
+
+# create a timer with a callback, using callback(None) to stop
+tim = Timer(1, freq=100, callback=cb1)
+pyb.delay(5)
+print("before cb1")
+pyb.delay(15)
+
+# create a timer with a callback, using deinit to stop
+tim = Timer(2, freq=100, callback=cb2)
+pyb.delay(5)
+print("before cb2")
+pyb.delay(15)
+
+# create a timer, then set the freq, then set the callback
+tim = Timer(4)
+tim.init(freq=100)
+tim.callback(cb1)
+pyb.delay(5)
+print("before cb1")
+pyb.delay(15)
+
+# test callback with a closure
+tim.init(freq=100)
+tim.callback(cb3(3))
+pyb.delay(5)
+print("before cb4")
+pyb.delay(15)