move dirs

spi.c

@@ -0,0 +1,37 @@
+#include "spi.h"
+
+void spi_select(void)
+{
+    CS_PORT&=~(1<<CS_BIT);
+}
+
+void spi_deselect(void)
+{
+    CS_PORT|=(1<<CS_BIT);
+}
+
+unsigned char spi_xchg(unsigned char val)
+{
+	SPDR = val;
+	while (!(SPSR & (1 << SPIF))) ;
+	return SPDR;
+}
+
+uint8_t spi_read(){
+	return spi_xchg(0x00);
+}
+
+void spi_write(uint8_t d){
+	spi_xchg(d);
+}
+
+void spi_init(){
+	CS_PORT |= (1 << CS_BIT);	// pull CS pin high
+	CS_DDR |= (1 << CS_BIT);	// now make it an output
+
+	SPI_PORT |= (1 << 0);	// make sure SS is high
+	SPI_DDR = (1 << PORTB2) | (1 << PORTB1) | (1 << PORTB0);	// set MOSI, SCK and SS as output, others as input
+	SPCR = (1 << SPE) | (1 << MSTR);	// enable SPI, master mode 0
+	SPCR |= (1 << SPR0) | (0<<SPR1); // div 128
+	SPSR |= (0 << SPI2X);	// set the clock rate fck/2
+}