add libs

lib_gpio/tests/gpio_events_checker.py

@@ -0,0 +1,49 @@
+# Copyright 2015-2021 XMOS LIMITED.
+# This Software is subject to the terms of the XMOS Public Licence: Version 1.
+import xmostest
+
+class GPIOEventsChecker(xmostest.SimThread):
+    """
+    This simulator thread will write to pins to allow xCORE to event.
+    """
+
+    def __init__(self, test_port, expected_test_port_data, num_clients,
+                 trigger_port):
+        self._test_port = test_port
+        self._expected_test_port_data = expected_test_port_data
+        self._num_clients = num_clients
+        self._trigger_port = trigger_port
+
+        print("Checking events on port %s with %d clients" % (self._test_port,
+              self._num_clients))
+        print("Using port %s as trigger" % (self._trigger_port))
+
+    def drive_port(self, xsi):
+        # Check the xCORE is not trying to drive the port
+        if xsi.is_port_driving(self._test_port):
+            print("ERROR: xCORE driving port %s which expected to be input only"
+                % (self._test_port))
+        # Drive the test port
+        xsi.drive_port_pins(self._test_port, self._expected_test_port_data)
+        print("Checker driving port")
+        # Flip bits of expected data for second part of test
+        self._expected_test_port_data = ~self._expected_test_port_data
+        # Delay driving new data to test port until num_client bits of
+        # trigger_port go high
+        expected_trigger_data = 0
+        for i in range(0, self._num_clients):
+            expected_trigger_data = (expected_trigger_data << 1) + 1
+        print("Checker expecting 0x%x as trigger data" % (expected_trigger_data))
+        while True:
+            self.wait_for_port_pins_change([self._trigger_port])
+            trigger_data = xsi.sample_port_pins(self._trigger_port)
+            if trigger_data == expected_trigger_data:
+                print("Checker received correct trigger")
+                break
+        # Drive the test port
+        xsi.drive_port_pins(self._test_port, self._expected_test_port_data)
+        print("Checker driving port")
+
+    def run(self):
+        self.drive_port(self.xsi)
+        print("Checker complete")