449d2a6367
Contains two different component folders per each implementation (serial_master and serial_slave) with concrete ports. Added common public api for master and slave and common interface for master and slave implementation. Add support of cmake system (added cmake files). Added sdkconfig.defaults files for slave and master modbus examples. Updated make file and KConfig for freemodbus component Update according to review and fix doxygen warnings Fix Doxyfile to pass documentation build Update headers and change interface file names as per review comments Merge branch feature/freemodbus_move_rs485_mode_control Update after review: The stack modbus folder updated to support master and slave ports together and moved into freemodbus/modbus Stack and port files updated to remove duplicated simbols Make file, KConfig and CMakeLists.txt updated to compile master and slave stacks, common interface and concrete implementations of ports Stack callback functions execute callbacks using interface pointer from concrete port implementation User can instantiate any of concrete port using common API (only one concrete port at a time) and it does not require to select port by KConfig Port pins and mode configuration moved into example files from port files to allow user select pins and port mode (customer request) Changes tested using pymodbus, ModbusPoll and communication between two boards Updated DoxyFile according to public include path Fix maximum instance size for slave (merge from master of customer issue) Fix critical section issue TW#28622 (change spin lock based critical section to semaphore) Move serial port files into component port folder for master and slave accordingly Fix example issue showed in the log when IO slave is not configured correctly Fix conflicts while merging from origin/master Fix errors handling in modbus controller interface + some final corrections according to review Update maximum allowed number of slaves in the network segment Fix bug with incorrect coils read mask Closes https://github.com/espressif/esp-idf/issues/858
Espressif IoT Development Framework
ESP-IDF is the official development framework for the ESP32 chip.
Developing With ESP-IDF
Setting Up ESP-IDF
See setup guides for detailed instructions to set up the ESP-IDF:
- Getting Started Guide for the stable ESP-IDF version
- Getting Started Guide for the latest (master branch) ESP-IDF version
Finding a Project
As well as the esp-idf-template project mentioned in Getting Started, ESP-IDF comes with some example projects in the examples directory.
Once you've found the project you want to work with, change to its directory and you can configure and build it.
To start your own project based on an example, copy the example project directory outside of the ESP-IDF directory.
Quick Reference
See the Getting Started guide links above for a detailed setup guide. This is a quick reference for common commands when working with ESP-IDF projects:
Configuring the Project
make menuconfig
- Opens a text-based configuration menu for the project.
- Use up & down arrow keys to navigate the menu.
- Use Enter key to go into a submenu, Escape key to go out or to exit.
- Type
?to see a help screen. Enter key exits the help screen. - Use Space key, or
YandNkeys to enable (Yes) and disable (No) configuration items with checkboxes "[*]" - Pressing
?while highlighting a configuration item displays help about that item. - Type
/to search the configuration items.
Once done configuring, press Escape multiple times to exit and say "Yes" to save the new configuration when prompted.
Compiling the Project
make -j4 all
... will compile app, bootloader and generate a partition table based on the config.
NOTE: The -j4 option causes make to run 4 parallel jobs. This is much faster than the default single job. The recommended number to pass to this option is -j(number of CPUs + 1).
Flashing the Project
When the build finishes, it will print a command line to use esptool.py to flash the chip. However you can also do this automatically by running:
make -j4 flash
This will flash the entire project (app, bootloader and partition table) to a new chip. The settings for serial port flashing can be configured with make menuconfig.
You don't need to run make all before running make flash, make flash will automatically rebuild anything which needs it.
Viewing Serial Output
The make monitor target uses the idf_monitor tool to display serial output from the ESP32. idf_monitor also has a range of features to decode crash output and interact with the device. Check the documentation page for details.
Exit the monitor by typing Ctrl-].
To build, flash and monitor output in one pass, you can run:
make -j4 flash monitor
Compiling & Flashing Only the App
After the initial flash, you may just want to build and flash just your app, not the bootloader and partition table:
make app- build just the app.make app-flash- flash just the app.
make app-flash will automatically rebuild the app if any source files have changed.
(In normal development there's no downside to reflashing the bootloader and partition table each time, if they haven't changed.)
Parallel Builds
ESP-IDF supports compiling multiple files in parallel, so all of the above commands can be run as make -jN where N is the number of parallel make processes to run (generally N should be equal to the number of CPU cores in your system, plus one.)
Multiple make functions can be combined into one. For example: to build the app & bootloader using 5 jobs in parallel, then flash everything, and then display serial output from the ESP32 run:
make -j5 flash monitor
The Partition Table
Once you've compiled your project, the "build" directory will contain a binary file with a name like "my_app.bin". This is an ESP32 image binary that can be loaded by the bootloader.
A single ESP32's flash can contain multiple apps, as well as many different kinds of data (calibration data, filesystems, parameter storage, etc). For this reason a partition table is flashed to offset 0x8000 in the flash.
Each entry in the partition table has a name (label), type (app, data, or something else), subtype and the offset in flash where the partition is loaded.
The simplest way to use the partition table is to make menuconfig and choose one of the simple predefined partition tables:
- "Single factory app, no OTA"
- "Factory app, two OTA definitions"
In both cases the factory app is flashed at offset 0x10000. If you make partition_table then it will print a summary of the partition table.
For more details about partition tables and how to create custom variations, view the docs/en/api-guides/partition-tables.rst file.
Erasing Flash
The make flash target does not erase the entire flash contents. However it is sometimes useful to set the device back to a totally erased state, particularly when making partition table changes or OTA app updates. To erase the entire flash, run make erase_flash.
This can be combined with other targets, ie make erase_flash flash will erase everything and then re-flash the new app, bootloader and partition table.
Resources
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Documentation for the latest version: https://docs.espressif.com/projects/esp-idf/. This documentation is built from the docs directory of this repository.
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The esp32.com forum is a place to ask questions and find community resources.
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Check the Issues section on github if you find a bug or have a feature request. Please check existing Issues before opening a new one.
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If you're interested in contributing to ESP-IDF, please check the Contributions Guide.