cpu/kinetis: allow flashing without toolchain

boards/common/frdm/Makefile.include

@@ -22,9 +22,6 @@ export OPENOCD_PRE_VERIFY_CMDS += \
   -c 'load_image $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin 0x20000000 bin' \
   -c 'resume 0x20000000'
 export OPENOCD_EXTRA_INIT
-
-FLASHDEPS += $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin
-
 export OPENOCD_CONFIG ?= $(RIOTBOARD)/common/frdm/dist/old-openocd-$(CPU_FAMILY).cfg
 endif
 

boards/mulle/Makefile.include

@@ -58,8 +58,6 @@ export OPENOCD_PRE_VERIFY_CMDS += \
   -c 'resume 0x20000000'
 export PRE_FLASH_CHECK_SCRIPT = $(RIOTCPU)/$(CPU)/dist/check-fcfield.sh
 
-FLASHDEPS += $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin
-
 # this board uses openocd
 include $(RIOTMAKE)/tools/openocd.inc.mk
 

boards/pba-d-01-kw2x/Makefile.include

@@ -10,8 +10,6 @@ export CPU_MODEL ?= mkw21d256vha5
 PORT_LINUX ?= /dev/ttyACM0
 PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
 
-FLASHDEPS += $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin
-
 # 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

cpu/kinetis/Makefile.include

@@ -47,8 +47,4 @@ USEMODULE += periph_mcg
 endif
 USEMODULE += periph_wdog
 
-# Define a recipe to build the watchdog disable binary, used when flashing
-$(RIOTCPU)/$(CPU)/dist/wdog-disable.bin: $(RIOTCPU)/$(CPU)/dist/wdog-disable.s
-	$(Q)$(MAKE) -C $(RIOTCPU)/$(CPU)/dist/ $(notdir $@)
-
 include $(RIOTMAKE)/arch/cortexm.inc.mk

cpu/kinetis/dist/README.md

@@ -6,10 +6,15 @@ This directory contains tools for working with K60 CPUs.
 Watchdog disable
 ----------------
 
-wdog-disable.bin is a location-independent watchdog disable function with a breakpoint instruction at the end. Useful for disabling the watchdog directly from OpenOCD.
+wdog-disable.bin is a location-independent watchdog disable function with a
+breakpoint instruction at the end. Useful for disabling the watchdog directly
+from OpenOCD.
 
 Usage:
 
     openocd -c 'reset halt' \
       -c 'load_image wdog-disable.bin 0x20000000 bin' \
       -c 'resume 0x20000000' # watchdog is disabled and core halted
+
+The file is saved generated in the repository to remove the need to have a
+compiler when flashing. It is only 34 bytes binary.

cpu/kinetis/dist/check-fcfield.sh

@@ -12,6 +12,8 @@
 # @author       Joakim Nohlgård <joakim.nohlgard@eistec.se>
 # @author       Francisco Molina <francisco.molina@inria.fr>
 
+: ${OBJDUMP:=arm-none-eabi-objdump}
+
 # elf, hex or bin file to flash
 FLASHFILE="$1"
 
@@ -27,11 +29,11 @@ EXPECTED_FCFIELD="^fffffffffffffffffffffffffe..ffff$"
 get_fc_field()
 {
     if [ ${1##*.} = elf ]; then
-        arm-none-eabi-objdump -j.fcfield -s "${1}"
+        "${OBJDUMP}" -j.fcfield -s "${1}"
     elif [ ${1##*.} = bin ]; then
-        arm-none-eabi-objdump --start-address=${FCFIELD_START} --stop-address=${FCFIELD_END} -bbinary -marm ${1} -s
+        "${OBJDUMP}" --start-address=${FCFIELD_START} --stop-address=${FCFIELD_END} -bbinary -marm ${1} -s
     elif [ ${1##*.} = hex ]; then
-        arm-none-eabi-objdump --start-address=${FCFIELD_START} --stop-address=${FCFIELD_END} ${1} -s
+        "${OBJDUMP}" --start-address=${FCFIELD_START} --stop-address=${FCFIELD_END} ${1} -s
     else
         echo "Unkown file extension: ${1##*.}"
         exit 1