Q&A: Why doesn't the Makefile work in the SDK's Apollo3_EVB BSP folder?

Full question(s):

I need to make a change to the default pin mapping, and I am trying to rebuild the am_bsp_pins.c and .h files for Apollo3 in the SDK 2.1.0 release.  However, after I make my changes in the bsp_pins.src file and I try to rebuild with the existing makefile I get an error message saying “no such file or directory”.  Why?

Answer(s):

The BSP makefile for the Apollo3 EVB in boards\apollo3_evb\bsp in both SDK 2.1.0 and 2.2.0 is missing the reference to the MCU which is used in the path for the HAL’s am_hal_pin.h file.  To fix this, the makedefs\am_bsp.mk needs to be edited as follows.  The red text has been removed from the file.

Change from:

# Make "all" the default target.
all: bsp_pins.src am_bsp_pins.c am_bsp_pins.h $(SWROOT)/mcu/$(FAMILY)/hal/am_hal_pin.h

am_bsp_pins.c: bsp_pins.src
 $(SWROOT)/tools/bsp_generator/pinconfig.py bsp_pins.src C >am_bsp_pins.c

am_bsp_pins.h: bsp_pins.src
 $(SWROOT)/tools/bsp_generator/pinconfig.py bsp_pins.src H >am_bsp_pins.h

$(SWROOT)/mcu/apollo3/hal/am_hal_pin.h:
 $(MAKE) -C $(SWROOT)/mcu/apollo3/hal am_hal_pin.h

# All makefiles use this to find the top level directory.
SWROOT?=..
include $(SWROOT)/makedefs/subdirs.mk

Change to:

# Make "all" the default target.
all: bsp_pins.src am_bsp_pins.c am_bsp_pins.h

am_bsp_pins.c: bsp_pins.src
 $(SWROOT)/tools/bsp_generator/pinconfig.py bsp_pins.src C >am_bsp_pins.c

am_bsp_pins.h: bsp_pins.src
 $(SWROOT)/tools/bsp_generator/pinconfig.py bsp_pins.src H >am_bsp_pins.h

# All makefiles use this to find the top level directory.
SWROOT?=..
include $(SWROOT)/makedefs/subdirs.mk

This issue has been corrected in the currently posted release of the SDK.