relay4: add wrapper

Signed-off-by: Francois Berder <[email protected]>

Author: francois-berder

letmecreate/click/__init__.py

@@ -18,8 +18,9 @@
   - ADC
   - Alcohol
   - Eve
+  - Relay4
 """
 
 __all__ = ['thermo3', 'proximity', 'accel', 'relay2', 'motion', 'led_matrix',
            'joystick', 'color', 'seven_seg', 'ir_distance', 'bargraph',
-           'relay', 'ir_eclipse', 'color2', 'adc', 'alcohol', 'eve']
+           'relay', 'ir_eclipse', 'color2', 'adc', 'alcohol', 'eve', 'relay4']

letmecreate/click/relay4.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+"""Python binding of Relay4 Click wrapper of LetMeCreate library."""
+
+import ctypes
+
+_LIB = ctypes.CDLL('libletmecreate_click.so')
+
+
+def enable(relay_0_pin, relay_1_pin, relay_2_pin, relay_3_pin):
+    ret = _LIB.relay4_click_enable(relay_0_pin,
+                                   relay_1_pin,
+                                   relay_2_pin,
+                                   relay_3_pin)
+    if ret < 0:
+        raise Exception("relay4 click enable failed")
+
+
+def disable():
+    ret = _LIB.relay4_click_disable()
+    if ret < 0:
+        raise Exception("relay4 click disable failed")
+
+
+def set_state(index, state):
+    ret = _LIB.relay4_click_set_state(index, state)
+    if ret < 0:
+        raise Exception("relay4 click set state failed")
+
+
+def get_state(index):
+    state = ctypes.c_uint8(0)
+    ret = _LIB.relay4_click_get_state(index, ctypes.byref(state))
+    if ret < 0:
+        raise Exception("relay4 click get state failed")
+    return state.value
+
+
+def toggle(index):
+    ret = _LIB.relay4_click_toggle(index)
+    if ret < 0:
+        raise Exception("relay4 click toggle failed")