-#define SDA_HI /* Implement me:Set SDA High by setting SDA pin as input */
-#define SDA_LO /* Implement me:Set SDA Low by setting SDA pin as open collector output */
-#define SCL_HI /* Implement me:Set SCL High by setting SCL pin as input */
-#define SCL_LO /* Implement me:Set SCL Low by setting SCL pin as open collector output */
+#define SDA_HI do { /* Implement me:Set SDA High by setting SDA pin as input */ } while (0)
+#define SDA_LO do { /* Implement me:Set SDA Low by setting SDA pin as open collector output */ } while (0)
+#define SCL_HI do { /* Implement me:Set SCL High by setting SCL pin as input */ } while (0)
+#define SCL_LO do { /* Implement me:Set SCL Low by setting SCL pin as open collector output */ } while (0)