[riot-notifications] [RIOT-OS/RIOT] makefiles/mcuboot: prepare for when FLASHFILE is used (#11112)

Gaƫtan Harter notifications at github.com
Tue Mar 5 18:10:48 CET 2019

### Contribution description

Prepare to keep working when `FLASHFILE` is used for the FLASHER.

### Limitation

This does not declare the generated file to flash as `FLASHFILE` as it is currently not a file target.
This would come after https://github.com/RIOT-OS/RIOT/pull/10494

### Testing procedure

#### Nothing broke
The previous behavior did not change:

make -C tests/mcuboot/ mcuboot-flash 
make -C tests/mcuboot/ term
make: Entering directory '/home/harter/work/git/worktree/riot_release/tests/mcuboot'
/home/harter/work/git/worktree/riot_release/dist/tools/pyterm/pyterm -p "/dev/ttyACM0" -b "115200"
Twisted not available, please install it if you want to use pyterm's JSON capabilities
2019-03-05 18:06:21,953 - INFO # Connect to serial port /dev/ttyACM0
Welcome to pyterm!
Type '/exit' to exit.

2019-03-05 18:09:20,682 - INFO # Hello MCUBoot!
2019-03-05 18:09:20,686 - INFO # You are running RIOT on a(n) nrf52dk board.
2019-03-05 18:09:20,689 - INFO # This board features a(n) nrf52 MCU.
2019-03-05 18:09:20,692 - INFO # The startup address is: 0x8200

#### Future should work

FLASHFILE is indeed given to the flash target.
It can be tested by replacing the flasher with echo $(FLASHFILE) and seeing the file being printed:

RIOT_CI_BUILD=1  make --no-print-directory -C tests/mcuboot mcuboot-flash FLASHER=echo FFLAGS='FLASHFILE: $(FLASHFILE)'
Building application "tests_mcuboot" for "nrf52dk" with MCU "nrf52".

   text    data     bss     dec     hex filename
   8108     136    2604   10848    2a60 /home/harter/work/git/worktree/riot_release/tests/mcuboot/bin/nrf52dk/tests_mcuboot.elf

Re-linking for MCUBoot at 0x8000...

Signed with /home/harter/work/git/worktree/riot_release/tests/mcuboot/bin/nrf52dk/key.pem for version 1.1.1+1\

/home/harter/work/git/worktree/riot_release/dist/tools/dlcache/dlcache.sh: getting "http://download.riot-os.org/mynewt.mcuboot.bin" from cache
FLASH_ADDR=0x0 echo FLASHFILE: /home/harter/work/git/worktree/riot_release/tests/mcuboot/bin/nrf52dk/mcuboot.bin
FLASHFILE: /home/harter/work/git/worktree/riot_release/tests/mcuboot/bin/nrf52dk/mcuboot.bin
FLASH_ADDR=0x8000 echo FLASHFILE: /home/harter/work/git/worktree/riot_release/tests/mcuboot/bin/nrf52dk/signed-tests_mcuboot.bin
FLASHFILE: /home/harter/work/git/worktree/riot_release/tests/mcuboot/bin/nrf52dk/signed-tests_mcuboot.bin

### Issues/PRs references

This is part of #8838
You can view, comment on, or merge this pull request online at:


-- Commit Summary --

  * makefiles/mcuboot: prepare for when FLASHFILE is used

-- File Changes --

    M makefiles/mcuboot.mk (2)

-- Patch Links --


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