* Define the macros needed to set the serial input bit of SIPO device
* low or high.
*/
-#define SIPO_SI_HIGH()/* Implement me! */
-#define SIPO_SI_LOW() /* Implement me! */
+#define SIPO_SI_HIGH() do { /* Implement me! */ } while (0)
+#define SIPO_SI_LOW() do { /* Implement me! */ } while (0)
/**
* Drive pin to load the bit, presented in serial-in pin,