[Export - Make] Add message that informs the user which hex to flash

[theotherjimmy]

Description

Resolves #2962 part B in a way that should be noticable

Reviews

• @0xc0170
• @pan-
• @ashok-rao

Examples

It looks like this (k64f, no hex file merging):

$ make -j 
[SNIP]
Compile: port_api.c
Compile: sleep.c
Compile: i2c_api.c
Compile: rtc_api.c
../mbed-os/targets/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/drivers/fsl_enet.c: In function 'ENET_SetTxBufferDescriptors':
../mbed-os/targets/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_MCU_K64F/drivers/fsl_enet.c:493:29: warning: comparison between pointer and integer
         if (txBuffSizeAlign != NULL)
                             ^
link: mbed-os-example-blinky.elf
'arm-none-eabi-objcopy' -O binary mbed-os-example-blinky.elf mbed-os-example-blinky.bin
'arm-none-eabi-objcopy' -O ihex mbed-os-example-blinky.elf mbed-os-example-blinky.hex
===== bin file ready to flash: .build/mbed-os-example-blinky.bin =====

OR this (nrf52_dk, hex file merging):

$ make -j
[SNIP]
link: mbed-os-example-blinky.elf
'arm-none-eabi-objcopy' -O binary mbed-os-example-blinky.elf mbed-os-example-blinky.bin
'arm-none-eabi-objcopy' -O ihex mbed-os-example-blinky.elf mbed-os-example-blinky.hex
NOTE: the srec_cat binary is required to be present in your PATH. Please see http://srecord.sourceforge.net/ for more information.
srec_cat .././mbed-os/targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF52832/sdk/softdevice/s132/hex/s132_nrf52_2.0.0_softdevice.hex  -intel mbed-os-example-blinky.hex -intel -o mbed-os-example-blinky-combined.hex -intel --line-length=44
===== hex file ready to flash: .build/mbed-os-example-blinky-combined.hex =====

[bridadan]

For targets that don't have a srec step, could you refer the user to the .bin file instead of the .hex file? I only say this because I know .bin is widely supported across all the board interface firmwares (STLink, DAPLink, etc), however I'm not sure about .hex.

[theotherjimmy]

@bridadan Nope. We only merge the hex. I can do it for non-srec step makefiles. ;)

[bridadan]

@theotherjimmy Oops, that's what I meant. Yes please!

[theotherjimmy]

@bridadan Done.

[bridadan]

Awesome!

[ashok-rao]

LGTM

[pan-]

+1