Import LinuxCNC source tree

tests/halmodule.2/halmodtest.py

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+#!/usr/bin/env python3
+
+#
+# This shows HAL with Python without creating a component. All functions that
+# only require a mapped HAL shared memory segment will function fine without a
+# component.
+# That means hal.* functions will generally function as expected immediately
+# after the HAL module is imported.
+#
+
+import time
+import hal
+
+# Wait for at least one thread cycle
+def cycleWait():
+    oldtime = time.time()
+    newval = oldval = hal.get_value("testthread.threadbeat")
+    while newval <= oldval:
+        if time.time() - oldtime >= 10.0:
+            sys.exit("error: cycleWait(): Timeout")
+        time.sleep(0.001)
+        newval = hal.get_value("testthread.threadbeat")
+
+# We need to make sure that the servo-thread ran at least
+# once for the input to be copied to the output
+cycleWait()
+
+sigs = [ "net-input-a", "net-input-b",
+         "and2.0.out",  "or2.0.out",
+         "xor2.0.in0",  "xor2.0.in1",
+         "net-output" ]
+
+def values(pfx):
+    out = []
+    for s in sigs:
+        out.append(int(hal.get_value(s)))
+    print(f"{pfx} {out}")
+
+values("-")
+
+v  = hal.get_s("net-input-a")
+v += hal.get_s("net-input-b") * 2
+
+for i in range(4):
+    hal.set_s("net-input-a", 0 != (i+v) & 1)
+    hal.set_s("net-input-b", 0 != (i+v) & 2)
+    # Output is set in the thread cycle, need at least
+    # one cycle after input change
+    cycleWait()
+    values(str(i))
+