changes to Makefile and main.c to add i2c.c

stm/Makefile

@@ -33,6 +33,7 @@ SRC_C = \
 	audio.c \
 	sdio.c \
 	pybwlan.c \
+	i2c.c \
 
 SRC_S = \
 	startup_stm32f40xx.s \

stm/main.c

@@ -37,6 +37,7 @@
 #include "timer.h"
 #include "audio.h"
 #include "pybwlan.h"
+#include "i2c.h"
 
 int errno;
 
@@ -877,6 +878,7 @@ soft_reset:
         rt_store_attr(m, qstr_from_str_static("rand"), rt_make_function_0(pyb_rng_get));
         rt_store_attr(m, qstr_from_str_static("Led"), rt_make_function_1(pyb_Led));
         rt_store_attr(m, qstr_from_str_static("Servo"), rt_make_function_1(pyb_Servo));
+	rt_store_attr(m, qstr_from_str_static("I2C"), rt_make_function_2(pyb_I2C));
         rt_store_name(qstr_from_str_static("pyb"), m);
 
         rt_store_name(qstr_from_str_static("open"), rt_make_function_2(pyb_io_open));