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esp32/README: Update toolchain setup.

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This commit is contained in:
Ayke van Laethem 2017-12-10 18:25:33 +01:00 committed by Damien George
parent 7a46d9ae73
commit f16c775a07
2 changed files with 28 additions and 24 deletions
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8
ports/esp32/Makefile
View File

@ -21,19 +21,23 @@ FLASH_FREQ ?= 40m
FLASH_SIZE ?= 4MB
CROSS_COMPILE ?= xtensa-esp32-elf-
ESPIDF_SUPHASH := 2c95a77cf93781f296883d5dbafcdc18e4389656
# paths to ESP IDF and its components
ifeq ($(ESPIDF),)
ifneq ($(IDF_PATH),)
ESPIDF = $(IDF_PATH)
else
$(error Please configure the ESPIDF variable)
$(info The ESPIDF variable has not been set, please set it to the root of the esp-idf repository.)
$(info See README.md for installation instructions.)
$(info Supported git hash: $(ESPIDF_SUPHASH))
$(error ESPIDF not set)
endif
endif
ESPCOMP = $(ESPIDF)/components
ESPTOOL ?= $(ESPCOMP)/esptool_py/esptool/esptool.py
# verify the ESP IDF version
ESPIDF_SUPHASH := 2c95a77cf93781f296883d5dbafcdc18e4389656
ESPIDF_CURHASH := $(shell git -C $(ESPIDF) show -s --pretty=format:'%H')
ifneq ($(ESPIDF_CURHASH),$(ESPIDF_SUPHASH))
$(info ** WARNING **)

44
ports/esp32/README.md
View File

@ -26,34 +26,28 @@ There are two main components that are needed to build the firmware:
different to the compiler used by the ESP8266)
- the Espressif IDF (IoT development framework, aka SDK)
Instructions for setting up both of these components are provided by the
ESP-IDF itself, which is found at https://github.com/espressif/esp-idf .
Follow the guide "Setting Up ESP-IDF", for Windows, Mac or Linux. You
only need to perform up to "Step 2" of the guide, by which stage you
should have installed the cross-compile and cloned the ESP-IDF repository.
The ESP-IDF changes quickly and MicroPython only supports a certain version. The
git hash of this version can be found by running `make` without a configured
`ESPIDF`. Then you can fetch only the given esp-idf using the following command:
$ git clone https://github.com/espressif/esp-idf.git
$ git checkout <Current supported ESP-IDF commit hash>
$ git submodule update --recursive
The binary toolchain (binutils, gcc, etc.) can be installed using the following
guides:
* [Linux installation](https://esp-idf.readthedocs.io/en/latest/get-started/linux-setup.html)
* [MacOS installation](https://esp-idf.readthedocs.io/en/latest/get-started/macos-setup.html)
* [Windows installation](https://esp-idf.readthedocs.io/en/latest/get-started/windows-setup.html)
If you are on a Windows machine then the
[Windows Subsystem for Linux](https://msdn.microsoft.com/en-au/commandline/wsl/install_guide)
is the most efficient way to install the ESP32 toolchain and build the project.
If you use WSL then follow the
[Linux guidelines](http://esp-idf.readthedocs.io/en/latest/get-started/linux-setup.html)
[Linux guidelines](https://esp-idf.readthedocs.io/en/latest/get-started/linux-setup.html)
for the ESP-IDF instead of the Windows ones.
Be advised that the ESP-IDF is still undergoing changes and only some
versions are supported. To find which build is compatible refer to the line
in the makefile containing the following:
```
ESPIDF_SUPHASH := <Current supported ESP-IDF commit hash>
```
After finishing "Step 2" you can roll back your current build of
the ESP-IDF (and update the submodules accordingly) using:
```
$ git checkout <Current supported ESP-IDF commit hash>
$ git submodule update --recursive
```
Note that you will get a warning when building the code if the ESP-IDF
version is incorrect.
The Espressif ESP-IDF instructions above only install pyserial for Python 2,
so if you're running Python 3 or a non-system Python you'll also need to
install `pyserial` (or `esptool`) so that the Makefile can flash the board
@ -64,7 +58,13 @@ $ pip install pyserial
Once everything is set up you should have a functioning toolchain with
prefix xtensa-esp32-elf- (or otherwise if you configured it differently)
as well as a copy of the ESP-IDF repository.
as well as a copy of the ESP-IDF repository. You will need to update your `PATH`
environment variable to include the ESP32 toolchain. For example, you can issue
the following commands on (at least) Linux:
$ export PATH=$PATH:$HOME/esp/crosstool-NG/builds/xtensa-esp32-elf/bin
You cam put this command in your `.profile` or `.bash_login`.
You then need to set the `ESPIDF` environment/makefile variable to point to
the root of the ESP-IDF repository. You can set the variable in your PATH,