Card detect over cs pin: clean initialisation/power up

[z180-stamp.git] / include / spi.h

diff --git a/include/spi.h b/include/spi.h
index 04ea7264a41fc775fbc47e914bb7a2454fe0df49..6358f62405263e42943043b5cd268ff8c8b14b19 100644 (file)
--- a/include/spi.h
+++ b/include/spi.h
@@ -27,10 +27,11 @@
 #define SPI_SET_SPEED_F_128            do {SPCR = (1<<SPE) | (1<<MSTR) | (1<<SPR1) | (1<<SPR0); SPSR = (0<<SPI2X); } while(0)
 
 /** switch to fast SPI Clock */
-#define SPISetFastClock()       SPI_SET_SPEED_F_2
-#define SPISetSlowClock()       SPI_SET_SPEED_F_8
-#define SPISetMMCInitClock() SPI_SET_SPEED_F_64
+#define SPISetFastClock()              SPI_SET_SPEED_F_2
+#define SPISetSlowClock()              SPI_SET_SPEED_F_8
+#define SPISetMMCInitClock()   SPI_SET_SPEED_F_64
 
+#define SPI_OFF()                              do { SPCR = 0; } while(0)
 
 static inline void spi_wait() {
        loop_until_bit_is_set(SPSR,SPIF);