+#define zer0
+#ifdef zer0
+ #define configure_pin_mosi() DDRB |= (1 << DDB5)
+ #define configure_pin_sck() DDRB |= (1 << DDB7)
+ #define configure_pin_ss() DDRC |= (1 << DDC6)
+ #define configure_pin_miso() DDRB &= ~(1 << DDB6)
+
+#define select_card() PORTC &= ~(1 << PORTC6)
+#define unselect_card() PORTC |= (1 << PORTC6)
+
+#else