tests/extmod_hardware/machine_encoder: Add a MIMXRT configuration.

robert-hh · robert-hh · commit 5e8bac151c1a · 2025-08-05T13:08:51.000+02:00
For Teensy 4.x. The connectivity tests and the falling edge of the
counter test are skipped.

Signed-off-by: robert-hh &lt;robert@hammelrath.com&gt;
diff --git a/tests/extmod_hardware/machine_counter.py b/tests/extmod_hardware/machine_counter.py
@@ -16,6 +16,11 @@
     id = 0
     out_pin = 4
     in_pin = 5
+elif sys.platform == "mimxrt":
+    if "Teensy" in sys.implementation._machine:
+        id = 0
+        out_pin = "D2"
+        in_pin = "D3"
 else:
     print("Please add support for this test on this platform.")
     raise SystemExit
@@ -43,6 +48,7 @@ def tearDown(self):
     def assertCounter(self, value):
         self.assertEqual(self.counter.value(), value)
 
+    @unittest.skipIf(sys.platform == "mimxrt", "cannot read back the pin")
     def test_connections(self):
         # Test the hardware connections are correct. If this test fails, all tests will fail.
         out_pin(1)
@@ -73,6 +79,7 @@ def test_change_directions(self):
         toggle(25)
         self.assertCounter(75)
 
+    @unittest.skipIf(sys.platform == "mimxrt", "FALLING edge not supported")
     def test_count_falling(self):
         self.counter.init(in_pin, direction=Counter.UP, edge=Counter.FALLING)
         toggle(20)
diff --git a/tests/extmod_hardware/machine_encoder.py b/tests/extmod_hardware/machine_encoder.py
@@ -19,6 +19,15 @@
     in0_pin = 5
     out1_pin = 12
     in1_pin = 13
+    start_value = -1
+elif sys.platform == "mimxrt":
+    if "Teensy" in sys.implementation._machine:
+        id = 0
+        out0_pin = "D2"
+        in0_pin = "D3"
+        out1_pin = "D5"
+        in1_pin = "D4"
+        start_value = 0
 else:
     print("Please add support for this test on this platform.")
     raise SystemExit
@@ -35,8 +44,9 @@ class TestEncoder(unittest.TestCase):
     def setUp(self):
         out0_pin(0)
         out1_pin(0)
-        self.enc = Encoder(id, in0_pin, in1_pin)
+        self.enc = Encoder(id, in0_pin, in1_pin, phases=1)
         self.pulses = 0  # track the expected encoder position in software
+        self.pulses = start_value  # track the expected encoder position in software
 
     def tearDown(self):
         self.enc.deinit()
@@ -52,6 +62,7 @@ def rotate(self, pulses):
     def assertPosition(self, value):
         self.assertEqual(self.enc.value(), value)
 
+    @unittest.skipIf(sys.platform == "mimxrt", "cannot read back the pin")
     def test_connections(self):
         # Test the hardware connections are correct. If this test fails, all tests will fail.
         for ch, outp, inp in ((0, out0_pin, in0_pin), (1, out1_pin, in1_pin)):
@@ -76,7 +87,9 @@ def test_partial(self):
         self.rotate(1)
         self.assertPosition(0)
         self.rotate(1)
-        self.assertPosition(1)  # only 3 pulses to count first rotation?
+        self.assertPosition(0)
+        self.rotate(1)
+        self.assertPosition(1)  # 4 pulses to count first rotation?
         self.rotate(1)
         self.assertPosition(1)
         self.rotate(1)
