embox_project_modbus_iocontrol is an Embox external project. It demonstrates how to libmodbus work in Embox. There are several target to run this demo:

• Standalong on Linux host
• In Embox on ARM QEMU
• In Embox on STM32F4-discovery

LEDs are emulated On QEMU and on host. The real on-board LEDs are used on STM32f4-Discovery.

To build on host (client and server) you need follow:

• Move to 'modbus/host_cmds' folder
• Build with 'make'

Run an emulation on the host:

• Build client and server
• Move to 'modbus/emulate' folder
• Run server './led-server'
• To run web-site you can go to 'modbus/http_admin' and run built-in python http server python3 -m http.server --cgi -d . Then you can check the LEDs states on a browser.
• To run the modbus client. Go to 'modbus/emulate' and run './led-client -a 127.0.0.1 set 78' to set up led 78 to high state or './led-client -a 127.0.0.1 clr 78' to low state

Run an emulation on the ARM QEMU:

• Build the modbus client
• Setup the project as external in Embox make ext_conf EXT_PROJECT_PATH=<path to root folder of this repo>. For example make ext_conf EXT_PROJECT_PATH=~/git/embox_project_modbus_iocontrol
• Configure Embox make confload-ext_project/modbus/arm_qemu
• Build Embox make
• Run Embox ./scripts/qemu/auto_qemu
• To run the modbus client. Go to 'modbus/emulate' and run './led-client -a 10.0.2.16 set 78' to set up led 78 to high state or './led-client -a 10.0.2.16 clr 78' to low state
• Additionally you can check state in your browser if visit page with 10.0.2.16 address

Run on a STM32F4-discovery board

• Build the modbus client
• Setup the project as external in Embox make ext_conf EXT_PROJECT_PATH=<path to root folder of this repo>. For example make ext_conf EXT_PROJECT_PATH=~/git/embox_project_modbus_iocontrol
• Configure Embox make confload-ext_project/modbus/stm32f4_discovery_demo
• Setup you network settings in 'conf/start_script.inc' file
• Build Embox make
• Upload image on the board
• To run the modbus client. Go to 'modbus/emulate' and run './led-client -a "board IP" set 3' to set up led 3 to high state or './led-client -a "board IP" clr 3' to low state
• Additionally you can check state in your browser if visit page with "board IP" address