Frame up the configuration for the serial interface on IOv2

src/modules/px4iofirmware/module.mk

@@ -3,7 +3,6 @@
 SRCS		= adc.c \
 		  controls.c \
 		  dsm.c \
-		  i2c.c \
 		  px4io.c \
 		  registers.c \
 		  safety.c \
@@ -16,4 +15,12 @@ SRCS		= adc.c \
 		  ../systemlib/mixer/mixer_group.cpp \
 		  ../systemlib/mixer/mixer_multirotor.cpp \
 		  ../systemlib/mixer/mixer_simple.cpp \
-		  
+
+ifneq ($(CONFIG_ARCH_BOARD_PX4IO),)
+SRCS		+= i2c.c
+EXTRADEFINES	+= -DINTERFACE_I2C
+endif
+ifneq ($(CONFIG_ARCH_BOARD_PX4IOV2),)
+#SRCS		+= serial.c
+EXTRADEFINES	+= -DINTERFACE_SERIAL
+endif

src/modules/px4iofirmware/px4io.c

@@ -64,11 +64,6 @@ struct sys_state_s 	system_state;
 
 static struct hrt_call serial_dma_call;
 
-#ifdef CONFIG_STM32_I2C1
-/* store i2c reset count XXX this should be a register, together with other error counters */
-volatile uint32_t i2c_loop_resets = 0;
-#endif
-
 /*
  * a set of debug buffers to allow us to send debug information from ISRs
  */
@@ -159,10 +154,13 @@ user_start(int argc, char *argv[])
 	/* initialise the control inputs */
 	controls_init();
 
-#ifdef CONFIG_STM32_I2C1
+#ifdef INTERFACE_I2C
 	/* start the i2c handler */
 	i2c_init();
 #endif
+#ifdef INTERFACE_SERIAL
+	/* start the serial interface */
+#endif
 
 	/* add a performance counter for mixing */
 	perf_counter_t mixer_perf = perf_alloc(PC_ELAPSED, "mix");
@@ -223,12 +221,11 @@ user_start(int argc, char *argv[])
 
 			struct mallinfo minfo = mallinfo();
 
-			isr_debug(1, "d:%u s=0x%x a=0x%x f=0x%x r=%u m=%u", 
+			isr_debug(1, "d:%u s=0x%x a=0x%x f=0x%x m=%u", 
 				  (unsigned)r_page_setup[PX4IO_P_SETUP_SET_DEBUG],
 				  (unsigned)r_status_flags,
 				  (unsigned)r_setup_arming,
 				  (unsigned)r_setup_features,
-				  (unsigned)i2c_loop_resets,
 				  (unsigned)minfo.mxordblk);
 			last_debug_time = hrt_absolute_time();
 		}