added automatic GPIO teardown, remap support to i2c, force error comments in ini if disabled

units/digital_in/unit_din.c

@@ -161,23 +161,7 @@ static error_t DI_init(Unit *unit)
 /** Tear down the unit */
 static void DI_deInit(Unit *unit)
 {
-    struct priv *priv = unit->data;
-
-    if (unit->status == E_SUCCESS) {
-        assert_param(priv->port);
-
-        bool suc = true;
-        uint16_t mask = 1;
-        for (int i = 0; i < 16; i++, mask <<= 1) {
-            if (priv->pins & mask) {
-                uint32_t ll_pin = pin2ll((uint8_t) i, &suc);
-                assert_param(suc); // this should never fail if we got this far
-
-                // configure the pin as analog
-                LL_GPIO_SetPinMode(priv->port, ll_pin, LL_GPIO_MODE_ANALOG);
-            }
-        }
-    }
+    // pins are de-inited during teardown
 
     // Release all resources
     rsc_teardown(unit);