How to create multiple workers in ASMP? [spresense sdk(cli)]

[gyps]

Hello!

I'm currently working on an ASMP programs using the spresense SDK (cli).
I am wondering how to configure the directories and makefiles for multiple workers on multiple cores in cli and how to build them.

[CamilaSouza]

Hi, @gyps

We are preparing the answer and will share it shortly with you

[gyps]

@CamilaSouza
Thank you for your time.
It will be very helpful.

[CamilaSouza]

Hi @gyps

Sorry for the delayed answer.
Here is a basic way to add another worker:

1. Copy hello directory under spresense/examples/asmp/worker/hello with another name in the same directory
   (For example: hello2)

2. Rename the target binary name in the Makefile in the directory you copied
   (For example:
   Under spresense/examples/asmp/worker/hello2/Makefile
   Line 50:
   BIN = hello2)

3. Add a new target (hello2) in worker/Makefile in WORKER_ELFS parameter
   (For example:
   Under spresense/examples/asmp/worker/Makefile
   Line 40:
   WORKER_ELFS = hello/hello hello2/hello2
   Line 73:

# Build workers

hello/hello: lib
	$(Q) $(MAKE) -C $(dir $@) TOPDIR="$(TOPDIR)" SDKDIR="$(SDKDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV)

hello2/hello2: lib
	$(Q) $(MAKE) -C $(dir $@) TOPDIR="$(TOPDIR)" SDKDIR="$(SDKDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV)
)

Then, build.

OBS:
In current asmp example, worker binaries are stored in ROM-FS. If the you want to use the SD Card for storing worker binaries, you need to remove FS_ROM config and add CXD56_SDIO config, and modify worker/Makefile to avoid making romfs.h.

To do so, binary of each worker is generated in the worker directory. (In this case, hello/hello and hello2/hello2).