added skeleton for planned i2c API

BaS_gcc/BaS_gcc.files

@@ -196,3 +196,4 @@ util/bas_string.c
 util/printf_helper.S
 util/wait.c
 bas.lk.in
+i2c/i2c.c

BaS_gcc/Makefile

@@ -52,7 +52,7 @@ TRGTDIRS= ./firebee ./m5484lite ./m54455
 OBJDIRS=$(patsubst %, %/objs,$(TRGTDIRS))
 TOOLDIR=util
 
-VPATH=dma exe flash fs if kbd pci spi sys usb net util video radeon x86emu xhdi
+VPATH=dma exe flash fs i2c if kbd pci spi sys usb net util video radeon x86emu xhdi
 
 # Linker control file. The final $(LDCFILE) is intermediate only (preprocessed version of $(LDCSRC)
 LDCFILE=bas.lk
@@ -85,6 +85,7 @@ CSRCS= \
 	s19reader.c \
 	flash.c \
 	dma.c \
+        i2c.c \
 	xhdi_sd.c \
 	xhdi_interface.c \
 	pci.c \

BaS_gcc/i2c/i2c.c

@@ -0,0 +1,41 @@
+
+#include <bas_types.h>
+
+void i2c_init(void)
+{
+
+}
+
+void i2c_set_frequency(int hz)
+{
+}
+
+int i2c_read(int address, char *data, int lengt, bool repeated)
+{
+    return 0;
+}
+
+int i2c_read_byte(int ack)
+{
+    return 0;
+}
+
+int i2c_write(int address, const char *data, int length, bool repeated)
+{
+    return 0;
+}
+
+int i2c_write_byte(int data)
+{
+    return 0;
+}
+
+void i2c_start(void)
+{
+
+}
+
+void i2c_stop(void)
+{
+
+}

BaS_gcc/include/i2c.h

@@ -28,6 +28,8 @@
 #ifndef _I2C_H
 #define _I2C_H
 
+#include "bas_types.h"
+
 /* --- General options ------------------------------------------------	*/
 
 struct i2c_msg;
@@ -82,4 +84,13 @@ struct i2c_msg
     unsigned char *buf;     /* pointer to msg data			*/
 };
 
+extern void i2c_init(void);
+extern void i2c_set_frequency(int hz);
+extern int i2c_read(int address, char *data, int lengt, bool repeated);
+extern int i2c_read_byte(int ack);
+extern int i2c_write(int address, const char *data, int length, bool repeated);
+extern int i2c_write_byte(int data);
+extern void i2c_start(void);
+extern void i2c_stop(void);
+
 #endif /* _I2C_H */