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build system: Use CMake-based build system as default when describing commands

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Angus Gratton
2019-06-23 11:54:31 +10:00
committed by Angus Gratton
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@@ -33,9 +33,17 @@ To start your own project based on an example, copy the example project director
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:
## Setup Build Environment
(See Getting Started guide for a full list of required steps with details.)
* Install host build dependencies mentioned in Getting Started guide.
* Add `tools/` directory to the PATH
* Run `python -m pip install requirements.txt` to install Python dependencies
## Configuring the Project
`make menuconfig`
`idf.py menuconfig`
* Opens a text-based configuration menu for the project.
* Use up & down arrow keys to navigate the menu.
@@ -49,76 +57,48 @@ Once done configuring, press Escape multiple times to exit and say "Yes" to save
## Compiling the Project
`make -j4 all`
`idf.py build`
... 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`
`idf.py -p PORT 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`.
Replace PORT with the name of your serial port (like `COM3` on Windows, `/dev/ttyUSB0` on Linux, or `/dev/cu.usbserial-X` on MacOS. If the `-p` option is left out, `idf.py flash` will try to flash the first available serial port.
You don't need to run `make all` before running `make flash`, `make flash` will automatically rebuild anything which needs it.
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 `idf.py menuconfig`.
You don't need to run `idf.py build` before running `idf.py flash`, `idf.py flash` will automatically rebuild anything which needs it.
## Viewing Serial Output
The `make monitor` target uses the [idf_monitor tool](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html) 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](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html).
The `idf.py monitor` target uses the [idf_monitor tool](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html) 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](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html).
Exit the monitor by typing Ctrl-].
To build, flash and monitor output in one pass, you can run:
`make -j4 flash monitor`
`idf.py 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.
* `idf.py app` - build just the app.
* `idf.py app-flash` - flash just the app.
`make app-flash` will automatically rebuild the app if any source files have changed.
`idf.py 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`](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`.
The `idf.py 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 `idf.py 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.
This can be combined with other targets, ie `idf.py -p PORT erase_flash flash` will erase everything and then re-flash the new app, bootloader and partition table.
# Resources