features/unit/limit:Unit Limit is a travel switch unit

Author: pandiannano

m5stack/libs/unit/__init__.py

@@ -30,3 +30,6 @@
 from .rs485_iso import ISO485
 from .ultrasonic_io import ULTRASONIC_IO
 from .ultrasonic_i2c import ULTRASONIC_I2C
+from .can import CANUnit
+from .limit import LIMITUnit
+from .op import OPUnit

m5stack/libs/unit/limit.py

@@ -0,0 +1,6 @@
+from hardware import Button
+
+
+def LIMITUnit(port):
+    return Button(port[0])
+    

m5stack/libs/unit/manifest.py

@@ -34,6 +34,9 @@
         "rs485_iso.py",
         "ultrasonic_io.py",
         "ultrasonic_i2c.py",
+        "can.py",
+        "limit.py",
+        "op.py"
     ),
     base_path="..",
     opt=0,