Handling of the Kconfig.projbuild during Ethernet support in the mros2-esp32 project

[yamati-kz]

Hello　@takasehideki san.
I would appreciate it if you could consider the Ethernet specifications for the wired connection.

1. Prerequisites

• Connect the Ethernet module via SPI.
• Use the examples/ethernet/basic Ethernet sample source.

2.Verification Status

2.1 Examples of Success

• Placing the Kconfig.projbuild file inside workspace/echoback_string/main/ works successfully.

workspace
├── echoback_string
│   ├── CMakeLists.txt
│   └── main
│       ├── CMakeLists.txt
│       ├── echoback_string.cpp
│       └── Kconfig.projbuild   # add
├── echoreply_string
├── m5stack_sample
├── pub_float32
├── pub_image
├── pub_long_string_sub_crc
├── pub_twist
├── sub_pose
└── sub_uint16

• The Kconfig.projbuild is created by merging as follows:

cat ./mros2esp32-network-select.txt \
    ~/esp/esp-idf/examples/ethernet/basic/main/Kconfig.projbuild \
    ~/esp/esp-idf/examples/ethernet/basic/components/ethernet_init/Kconfig.projbuild \
    > ./Kconfig.projbuild

• In the following description, switch between either Wi-Fi or Ethernet in mros2esp32-network-select.txt..

menu "mros2-esp32 network interface"
    choice
        prompt "mros2-esp32 network interface"
	    default MROS2_ESP32_NETIF_WIFI
            config MROS2_ESP32_NETIF_WIFI
                bool "WiFi"
            config MROS2_ESP32_NETIF_ETH_SPI
                bool "Ethernet-SPI"
	endchoice
endmenu

2.2 Examples of Failure (Improvements Needed)

• I edited the CMakeLists.txt, but even though the file seems to be read, it doesn't appear in idf.py menuconfig.
• The default location makes the software configuration cleaner

platform
├── ethernet            # rename basic to ethernet
│   ├── CMakeLists.txt 
│   ├── components
│   │   └── ethernet_init
│   │       ├── CMakeLists.txt
│   │       ├── ethernet_init.c
│   │       ├── ethernet_init.h
│   │       └── Kconfig.projbuild # Default location
│   └── main
│       ├── CMakeLists.txt
│       ├── ethernet_example_main.c
│       ├── ethernet_example_main.h
│       └── Kconfig.projbuild　# Default location
├── mros2-platform.cpp
├── mros2-platform.h
├── rtps
├── templates.hpp
└── wifi

I am attaching the Kconfig.projbuild that I created.
margefile.zip

Would you prefer that I create a pull request, or would you rather I attach only the necessary files in a ZIP file

[yamati-kz]

Hello @takasehideki san

This is the result of the investigation.
For example, if we copy this Kconfig.projbuild to ~/esp32/workspace/echoback_string/main/ and then run idf.py menuconfig, we can configure settings related to Ethernet."
The task of merging the Kconfig.projbuild becomes unnecessary, and the software configuration approach becomes simpler.

# filename : Kconfig.projbuild
menu "mros2-esp32 network interface"
    choice
        prompt "mros2-esp32 network interface"
	    default MROS2_ESP32_NETIF_WIFI
            config MROS2_ESP32_NETIF_WIFI
                bool "WiFi"
            config MROS2_ESP32_NETIF_ETH_SPI
                bool "Ethernet-SPI"
	endchoice
endmenu

source "../../../platform/ethernet/main/Kconfig.projbuild"
source "../../../platform/ethernet/components/ethernet_init/Kconfig.projbuild"

Kconfigprojbuild.zip