Add new project [12_m644p_WIZNET_HTTPServer_SDCARD_pages]

12_m644p_WIZNET_HTTPServer_SDCARD_pages/spi.c

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+#include <avr/io.h>
+#include "spi.h"
+
+/*
+ * Initialize SPI bus.
+ */
+
+void
+spi_init(void)
+{
+  // CS PIN for WIZNET ETHERNET
+  DDRB	|= _BV(WIZNET_CS); // CS to OUT && Disable
+  SPI_WIZNET_DISABLE();
+
+  // CS PIN for SDCARD
+  DDRB	|= _BV(SD_CS); // CS to OUT && Disable
+  SPI_SD_DISABLE();
+  
+
+  /* Initalize ports for communication with SPI units. */
+  /* CSN=SS and must be output when master! */
+  DDRB  |= _BV(MOSI) | _BV(SCK) | _BV(CSN);
+  PORTB |= _BV(MOSI) | _BV(SCK);
+ 
+  /* Enables SPI, selects "master", clock rate FCK / 4 - 4Mhz, and SPI mode 0 */
+  SPCR = _BV(SPE) | _BV(MSTR);
+  SPSR = 0x0;
+  //SPSR = _BV(SPI2X); //FCK / 2 - 8Mhz
+
+
+}