Initial commit of fifo and i2c headers

i2cspi_BaS_gcc/Makefile

@@ -71,7 +71,9 @@ CSRCS= \
 	$(SRCDIR)/sd_card.c \
 	$(SRCDIR)/wait.c \
 	$(SRCDIR)/s19reader.c \
-	$(SRCDIR)/flash.c
+        $(SRCDIR)/flash.c \
+        $(SRCDIR)/fifo.c \
+        $(SRCDIR)/i2c_firebee.c
 
 ASRCS= \
 	$(SRCDIR)/startcf.S \

i2cspi_BaS_gcc/include/fifo.h

@@ -0,0 +1,39 @@
+/*
+ * This is taken from general implementations
+ * on the internet, and definately needs some
+ * work.
+ *
+ * good enough for now.
+ *
+ */
+
+#ifndef FIREBEE_FIFO
+#define FIREBEE_FIFO
+
+#include <inttypes.h>
+
+typedef struct {
+     char * buf;
+     int head;
+     int tail;
+     int size;
+} fifo_t;
+
+void fifo_init(fifo_t*,char*,int);
+void fifo_advance(fifo_t*,int*);
+
+uint8_t fifo_get(fifo_t*);
+void fifo_put(fifo_t*,uint8_t);
+
+void fifo_clear(fifo_t*);
+
+int fifo_used(fifo_t*);
+int fifo_unused(fifo_t*);
+
+int fifo_full(fifo_t*);
+int fifo_empty(fifo_t*);
+
+int fifo_read(fifo_t*,char *,int);
+int fifo_write(fifo_t*,const char*,int);
+
+#endif

i2cspi_BaS_gcc/include/i2c_firebee.h

@@ -0,0 +1,45 @@
+/*
+ * i2c.h
+ *
+ */
+
+#ifndef I2CFIREBEE_h
+#define I2CFIREBEE_h
+
+#include <fifo.h>
+
+#ifndef BUFSIZ
+#define BUFSIZ 512
+#endif
+
+#define I2CTLREAD   (('i'<<8) | 1)
+#define I2CTLWRITE  (('i'<<8) | 2)
+#define I2CTLSBUF   (('i'<<8) | 3)
+#define I2CTLINIT   (('i'<<8) | 4)
+#define I2CTLDEV    (('i'<<8) | 5)
+
+// Set a specific bit
+#define set_bit(p,bit)          p |= bit
+// Clear a specific bit
+#define clear_bit(p,bit)        p &= ~bit
+
+#define ELAPSED(t)              (t - ReadTimer())
+
+#define I2C_BUFFER_LENGTH 32
+
+#define I2C_READY   0
+#define I2C_MXRX    1
+#define I2C_MXTX    2
+
+#define I2C_ADDR    6
+
+#define I2C_READ    1
+#define I2C_WRITE   0
+
+unsigned long ReadTimer();
+void DelayMicroSec(unsigned long);
+
+void I2C_Init();
+int I2C_ioctl(unsigned int, unsigned long);
+
+#endif

i2cspi_BaS_gcc/include/startcf.h

@@ -1,4 +1,5 @@
 
+#define SYSTEM_CLOCK    133
 #define cf_stack
 
 #define DIP_SWITCH		(*(volatile uint8_t *)(&_MBAR[0xA2C]))