- Implement all remaining Modbus registers as defined in the documentation v1.0.
- Add support for digital I/O, system status, and a simulated watchdog.
- Implement a placeholder for the firmware update mechanism, including CRC calculation for received data chunks.
- Remove the input simulation timer; digital inputs are now static and ready for real hardware.
- Add shell commands 'valve set_open_time' and 'valve set_close_time' to configure the virtual valve.
- Extend the 'show_config' command to display the new timing values.
- The new settings are persisted to flash storage.
- Implement virtual valve logic with time-based movement simulation.
- The valve state is now set to 'OPEN' immediately when the opening process starts, ensuring a safe and correct state representation.
- The state is only set to 'CLOSED' after the closing process has finished.
- Add persistence for max opening and closing times.
- Integrate the Zephyr Settings subsystem to persist Modbus parameters.
- Use NVS (Non-Volatile Storage) as the backend with a dedicated flash partition.
- Modbus baudrate and slave ID are now loaded at startup.
- Changes made via the shell are saved to flash and survive a reboot.
- Add a 'reset' command to the shell for easier testing.
- Fix all compiler and devicetree warnings for a clean build.
- Implement a new 'modbus' command in the shell.
- Add sub-commands 'set_baud', 'set_id', and 'show'.
- Add validation for baud rate and slave ID inputs.
- The new parameters are applied to the Modbus server at runtime, allowing for live reconfiguration of the communication settings.
- The shell backend is set to RTT.
- Add read support for system-level input registers:
- FIRMWARE_VERSION_MAJOR_MINOR (0xF0)
- FIRMWARE_VERSION_PATCH (0xF1)
- DEVICE_STATUS (0xF2)
- Use enums for register addresses to improve readability.
- Implement a workaround for a Kconfig issue by hardcoding the firmware version.
- Stabilize multi-register reads by returning 0 for unhandled input registers instead of an exception.
- NOTE: Writing to holding registers is currently unstable with mbpoll and will be addressed separately.
- Add a callback for reading Modbus input registers.
- Implement logic to provide the system uptime in seconds, split across two 16-bit registers (UPTIME_SECONDS_LOW at 0x00F3 and UPTIME_SECONDS_HIGH at 0x00F4) as per documentation.
- Return 0 for unhandled registers to prevent "Invalid data" errors with certain Modbus masters.
The Modbus server was previously unstable, leading to intermittent CRC errors when polled by a master. This was caused by the main thread exiting after initialization, which created timing and race condition issues for the interrupt-driven Modbus stack.
This fix ensures the main thread continues to run in a low-power sleep loop (). This provides a stable context for the Modbus server, resolving the CRC errors and ensuring reliable communication.
- Add a basic Modbus RTU server implementation based on Zephyr samples.
- Configure usart1 for Modbus via a board overlay.
- The server initializes and runs, but polling with mbpoll results in a timeout.
- This commit captures a functional but non-working state for further debugging.
- Enable the console subsystem and printk for debugging output.
- Configure the console to use the UART peripheral (usart1 on PA9/PA10).
- Disable RTT to ensure UART is the active console.
- Remove redundant DTS_ROOT from CMakeLists.txt as it's inferred from BOARD_ROOT.
- Clear the project configuration (prj.conf) to start with a minimal baseline.
Remove the top-level and configure each application to directly include the directory as a module or root. This simplifies the build process by making each application more self-contained while still allowing access to shared boards and libraries.
This commit captures a working multi-app build where the board definition is located in the 'software' directory and explicitly included by the slave_node application. This serves as a stable baseline.
- Reorganize the software directory to support multiple Zephyr applications (gateway, slave_node).
- Create a clear separation between applications and shared libraries.
- Add placeholder files for gateway and slave_node applications.
Eduard Iten