# define the cpu used by the Mulle board
export CPU = k60

# Default GDB port
export GDBPORT ?= 3333

# MULLE_SERIAL is used to select which specific Mulle board we are compiling for.
# This was called MULLE_BOARD_SERIAL_NUMBER previously, renamed because
# MULLE_BOARD_SERIAL_NUMBER is too long to type.
ifdef MULLE_SERIAL
  ifeq "200" "$(word 1, $(sort 200 $(MULLE_SERIAL)))"
    # >= 200
    ifneq "220" "$(word 1, $(sort 220 $(MULLE_SERIAL)))"
      # < 220
      CPU_MODEL = K60DN256ZVLL10
      # It seems some of the MK60DZ10 devices have problems with JTAG speeds >= around 400 KHz
      # when programming, we reduce the speed to 300 KHz with this command.
      CPU_OOCD_FLAGS += -c 'adapter_khz 300'
    else
      # >= 220
      CPU_MODEL = K60DN512VLL10
    endif
  endif
  CFLAGS += -DMULLE_SERIAL=$(MULLE_SERIAL)
endif

### CPU part number (must have a specific linker script for each part)
# Note that MK60DN256ZVLL10 (version 1.x) and MK60DN256VLL10 (version 2.x, no Z)
# only differ in some register locations etc, not in the actual memory layout,
# so it is safe to use the same linker script for both version 1.x and version
# 2.x silicon.
# The linker script needs to know the flash and RAM sizes of the device.

ifeq ($(CPU_MODEL),)
  CPU_MODEL = K60DN512VLL10
endif

export CPU_MODEL

# Host OS name
OS := $(shell uname)

# OpenOCD settings for Mulle board.
# Try to determine which version of the OpenOCD config file we should use.
# Specify PROGRAMMER_VERSION or PROGRAMMER_SERIAL to choose a specific programmer board.
ifeq ($(PROGRAMMER_VERSION),)
  ifneq ($(PROGRAMMER_SERIAL),)
    # Makefile-way of comparing numbers, using lexicographical sorting since we don't have any arithmetic comparisons.
    # Programmers with serial 100 -- 148 are version 0.60
    # Programmers with serial 301 -- 330 are version 0.70
    ifeq "100" "$(word 1, $(sort 100 $(PROGRAMMER_SERIAL)))"
      # >= 100
      ifneq "149" "$(word 1, $(sort 149 $(PROGRAMMER_SERIAL)))"
        # < 149
        PROGRAMMER_VERSION = 0.60
      else
        # >= 149
        PROGRAMMER_VERSION = 0.70
      endif
    endif
  endif
  # Default to version 0.60 programmer for now.
  PROGRAMMER_VERSION ?= 0.60
endif

export OPENOCD_CONFIG = $(RIOTBOARD)/$(BOARD)/dist/openocd/mulle-programmer-$(PROGRAMMER_VERSION).conf

# Add serial matching command
ifneq ($(PROGRAMMER_SERIAL),)
  OPENOCD_EXTRA_INIT += -c 'ftdi_serial $(PROGRAMMER_SERIAL)'
endif

OPENOCD_EXTRA_INIT += $(CPU_OOCD_FLAGS)

ifeq ($(PORT),)
  # try to find tty name by serial number, only works on Linux currently.
  ifeq ($(OS),Linux)
    ifneq ($(PROGRAMMER_SERIAL),)
      PORT := $(shell $(RIOTBASE)/dist/tools/usb-serial/find-tty.sh '^$(PROGRAMMER_SERIAL)$$')
    else
      # find-tty.sh will return the first USB tty if no serial is given.
      PORT := $(shell $(RIOTBASE)/dist/tools/usb-serial/find-tty.sh)
  endif
  else ifeq ($(OS),Darwin)
    PORT := $(shell ls -1 /dev/tty.usbserial* | head -n 1)
  endif
endif

# TODO: add support for windows as host platform
ifeq ($(PORT),)
  # None of the above methods worked, set some sane default value for PORT.
  $(info CAUTION: No terminal port for your host system found!)
  PORT := /dev/ttyUSB0
endif
export PORT

# Default optimization level, possible to override from command line.
OPTIMIZATION ?= -Os

# Default debug level
DEBUG_CFLAGS ?= -g3 -ggdb

# Target triple for the build. Use arm-none-eabi if you are unsure.
export TARGET_TRIPLE ?= arm-none-eabi

# Toolchain prefix, defaults to target triple followed by a dash, you will most likely not need to touch this.
export PREFIX  ?= $(if $(TARGET_TRIPLE),$(TARGET_TRIPLE)-)
export GDBPREFIX ?= $(PREFIX)

# define tools used for building the project
export CC = $(PREFIX)gcc
export CXX = $(PREFIX)g++
export AR = $(PREFIX)ar
export AS = $(PREFIX)as
export LINK = $(PREFIX)gcc
export SIZE = $(PREFIX)size
export OBJCOPY = $(PREFIX)objcopy
export OPENOCD ?= openocd
export GDB ?= $(GDBPREFIX)gdb
export DBG = $(GDB)
export TERMPROG ?= $(RIOTBASE)/dist/tools/pyterm/pyterm
export FLASHER = $(RIOTBASE)/dist/tools/openocd/openocd.sh
export DEBUGGER = $(RIOTBASE)/dist/tools/openocd/openocd.sh
export DEBUGSERVER = $(RIOTBASE)/dist/tools/openocd/openocd.sh
export RESET = $(RIOTBASE)/dist/tools/openocd/openocd.sh
export TERMFLAGS += -p "$(PORT)"
export FFLAGS = flash
export DEBUGGER_FLAGS = debug
export DEBUGSERVER_FLAGS = debug-server
export RESET_FLAGS = reset

# We need special handling of the watchdog if we want to speed up the flash
# verification by using the MCU to compute the image checksum after flashing.
# wdog-disable.bin is a precompiled binary which will disable the watchdog and
# return control to the debugger (OpenOCD)
export OPENOCD_PRE_VERIFY_CMDS += \
  -c 'load_image $(RIOTCPU)/kinetis_common/dist/wdog-disable.bin 0x20000000 bin' \
  -c 'resume 0x20000000'
export OPENOCD_EXTRA_INIT
export PRE_FLASH_CHECK_SCRIPT = $(RIOTCPU)/kinetis_common/dist/check-fcfield-hex.sh

.PHONY: flash
flash: $(RIOTCPU)/kinetis_common/dist/wdog-disable.bin

# Reset the default goal.
.DEFAULT_GOAL :=

# define build specific options
CPU_USAGE = -mcpu=cortex-m4
FPU_USAGE = -mfloat-abi=soft -msoft-float
export CFLAGS += \
    $(DEBUG_CFLAGS) \
    -std=gnu99 \
    $(OPTIMIZATION) \
    -Wall -Wstrict-prototypes -Werror=implicit-function-declaration \
    $(CPU_USAGE) \
    $(FPU_USAGE) \
    -mlittle-endian \
    -mthumb \
    -fno-common \
    -fshort-enums \
    -ffunction-sections \
    -fdata-sections \
    -fno-builtin \
    -fno-strict-aliasing \
    -fsigned-char \
    #
export CXXFLAGS += \
    -ffunction-sections \
    -fdata-sections \
    -fno-builtin \
    #
export ASFLAGS += \
    $(DEBUG_CFLAGS) \
    $(CPU_USAGE) \
    $(FPU_USAGE) \
    -mlittle-endian \
    #
export LINKFLAGS += \
    $(DEBUG_CFLAGS) \
    -std=gnu99 \
    $(CPU_USAGE) \
    $(FPU_USAGE) \
    -mlittle-endian \
    -static \
    -mthumb \
    -nostartfiles \
    -Wl,--fatal-warnings \
    #
export LINKFLAGS += -T$(LINKERSCRIPT)
export OFLAGS ?= -O ihex

ifdef BUILD_WITH_CLANG
ifneq ($(BUILD_WITH_CLANG),0)
export CFLAGS += -target $(TARGET_TRIPLE)
export CXXFLAGS += -target $(TARGET_TRIPLE)
export LINKFLAGS += -target $(TARGET_TRIPLE)
export CC       = clang
export CXX      = clang++
export LINK     = clang
export LLVMPREFIX ?= llvm-
export AS       = $(LLVMPREFIX)as
export AR       = $(LLVMPREFIX)ar
export NM       = $(LLVMPREFIX)nm
# There is no LLVM linker yet, use binutils.
#export LINKER   = $(LLVMPREFIX)ld
# objcopy does not have a clear substitute in LLVM
#export OBJCOPY  = $(LLVMPREFIX)objcopy
export OBJDUMP  = $(LLVMPREFIX)objdump
# LLVM lacks a binutils strip tool as well...
#export STRIP    = $(LLVMPREFIX)strip
export SIZE     = $(LLVMPREFIX)size

# Since Clang is not installed as a separate instance for each crossdev target
# we need to tell it where to look for platform specific includes (Newlib
# headers instead of Linux/Glibc headers.)
# On GCC this is done when building the cross compiler toolchain so we do not
# actually need to specify the include paths for system includes.
# Ubuntu gcc-arm-embedded toolchain (https://launchpad.net/gcc-arm-embedded)
# places newlib headers in several places, but the primary source seem to be
# /etc/alternatives/gcc-arm-none-eabi-include
# Gentoo crossdev places newlib headers in /usr/arm-none-eabi/include
# Ubuntu also seem to put a copy of the newlib headers in the same place as
# Gentoo crossdev, but we prefer to look at /etc/alternatives first.
# On OSX, newlib includes are possibly located in
# /usr/local/opt/arm-none-eabi*/arm-none-eabi/include
NEWLIB_INCLUDE_PATTERNS ?= \
  /etc/alternatives/gcc-$(TARGET_TRIPLE)-include \
  /usr/$(TARGET_TRIPLE)/include \
  /usr/local/opt/$(TARGET_TRIPLE)*/$(TARGET_TRIPLE)/include \
  #
# Use the wildcard Makefile function to search for existing directories matching
# the patterns above. We use the -isystem gcc/clang argument to add the include
# directories as system include directories.
NEWLIB_INCLUDES ?= \
    $(foreach dir, \
        $(foreach pat, $(NEWLIB_INCLUDE_PATTERNS), $(wildcard $(pat))), \
        -isystem $(dir))

endif
endif

export INCLUDES += $(NEWLIB_INCLUDES)

# use newlib nano-specs if available
ifeq ($(shell $(LINK) -specs=nano.specs -E - 2>/dev/null >/dev/null </dev/null ; echo $$?),0)
export LINKFLAGS += -specs=nano.specs -lc
endif

# export board specific includes to the global includes-listing
export INCLUDES += -I$(RIOTBOARD)/$(BOARD)/include

include $(RIOTBOARD)/$(BOARD)/Makefile.dep