tests/ports/rp2: Add tests for rp2-specific timer options.

Add tests for both one-shot and periodic timers using the rp2-specific
tick_hz= and hard= parameters.

Signed-off-by: Chris Webb <chris@arachsys.com>

tests/ports/rp2/rp2_machine_timer.py

@@ -0,0 +1,20 @@
+from machine import Timer
+from time import sleep_ms
+
+# Test the rp2-specific adjustable tick_hz and hard/soft IRQ handlers
+# for both one-shot and periodic timers.
+
+modes = {Timer.ONE_SHOT: "one-shot", Timer.PERIODIC: "periodic"}
+kinds = {False: "soft", True: "hard"}
+
+for mode in modes:
+    for hard in kinds:
+        for period in 2, 4:
+            timer = Timer(
+                mode=mode,
+                period=period,
+                hard=hard,
+                callback=lambda t: print("callback", modes[mode], kinds[hard], period),
+            )
+            sleep_ms(9)
+            timer.deinit()

tests/ports/rp2/rp2_machine_timer.py.exp

@@ -0,0 +1,16 @@
+callback one-shot soft 2
+callback one-shot soft 4
+callback one-shot hard 2
+callback one-shot hard 4
+callback periodic soft 2
+callback periodic soft 2
+callback periodic soft 2
+callback periodic soft 2
+callback periodic soft 4
+callback periodic soft 4
+callback periodic hard 2
+callback periodic hard 2
+callback periodic hard 2
+callback periodic hard 2
+callback periodic hard 4
+callback periodic hard 4