implement global debug interface.

kmk/utils.py

@@ -1,2 +1,30 @@
+from supervisor import ticks_ms
+
+
 def clamp(x, bottom=0, top=100):
     return min(max(bottom, x), top)
+
+
+_debug_enabled = False
+
+
+class Debug:
+    '''default usage:
+    debug = Debug(__name__)
+    '''
+
+    def __init__(self, name=__name__):
+        self.name = name
+
+    def __call__(self, message):
+        print(f'{ticks_ms()} {self.name}: {message}')
+
+    @property
+    def enabled(self):
+        global _debug_enabled
+        return _debug_enabled
+
+    @enabled.setter
+    def enabled(self, enabled):
+        global _debug_enabled
+        _debug_enabled = enabled