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Build Tensorflow Micropython on MAC OS using Bash Terminal

Tested on: macOS Monterey Version 12.1

Prerequisites

Properly Installing ESP-IDF (Taken from: https://docs.espressif.com/projects/esp-idf/en/v3.3/get-started-cmake/macos-setup.html)

sudo easy_install pip

pip install --user pyserial

brew install cmake ninja

brew install ccache

Download: https://dl.espressif.com/dl/xtensa-esp32-elf-osx-1.22.0-80-g6c4433a-5.2.0.tar.gz

mkdir -p ~/esp cd ~/esp tar -xzf ~/Downloads/xtensa-esp32-elf-osx-1.22.0-80-g6c4433a-5.2.0.tar.gz

Make Toolchain Accessible from Bash Terminal

Open your /bash.profile file by navigating to usr directory and pressing down the keys "Command, Shift, FullStop" it shoudl appear.

Add to your profile:

export PATH=$HOME/esp/xtensa-esp32-elf/bin:$PATH alias get_esp32="export PATH=$HOME/esp/xtensa-esp32-elf/bin:$PATH"

Git Clone ESP-IDF Version 4.4

cd ~/esp git clone -b v4.4 --recursive https://github.com/espressif/esp-idf.git esp-idf

Update the Submodules

cd esp-idf git submodule update --init

Reopen your /bash.profile and add the following:

export IDF_PATH=~/esp/esp-idf export PATH="$IDF_PATH/tools:$PATH"

Install the required python packages

python3 -m pip install --user -r $IDF_PATH/requirements.txt

Download the Tensorflow Micropython Examples Repo

git clone https://github.com/mocleiri/tensorflow-micropython-examples.git

Building ESP32S3

Building the TensorFlow Firmware

cd /tensorflow-micropython-examples

git submodule init git submodule update --recursive cd micropython git submodule update --init lib/axtls git submodule update --init lib/berkeley-db-1.xx cd ..

Get Cache Keys

IDF_COMMIT=142bb32c50fa9875b8b69fa539a2d59559460d72 TFLM_COMMIT=$(git submodule status tensorflow | awk '{print ($1)}')

Setup IDF within Repo (Another Option)

source ./micropython/tools/ci.sh && ci_esp32_idf44_setup

source ./esp-idf/export.sh

pip3 install Pillow pip3 install Wave

rm -rf ./micropython-modules/microlite/tflm

cd ./tensorflow

../micropython-modules/microlite/prepare-tflm-esp.sh

cd ..

Build Micropython Cross-Compiler

source ./esp-idf/export.sh cd ./micropython make -C mpy-cross V=1 clean all

cd ..

Build Generic ESP32S3 8MB FLASH

source ./esp-idf/export.sh

(OR: get_esp32 get_idf)

cd ./boards/esp32/MICROLITE_S3

rm -rf build idf.py clean build

To build other boards e.g. GENERIC_SPIRAM replace with Board definition

cd ./boards/esp32/MICROLITE_S3_SPIRAM

If succesful you should see a reult similar to this:

/micropython.bin or run 'idf.py -p (PORT) flash' bootloader @0x000000 18640 ( 14128 remaining) partitions @0x008000 3072 ( 1024 remaining) application @0x010000 1191120 ( 840496 remaining) total 1256656