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agrimagsrl committed Jan 26, 2020
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5 changes: 5 additions & 0 deletions .gitignore
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try.py
publish
venv
.idea
tinymlgen/__pycache__
3 changes: 3 additions & 0 deletions MANIFEST
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# file GENERATED by distutils, do NOT edit
setup.py
tinymlgen/tinymlgen.py
32 changes: 32 additions & 0 deletions README.md
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# TinyML gen

This is a simple package to export a model trained in Tensorflow Lite
to a plain C array, ready to be used for inference on microcontrollers.

### Install

```shell script
pip install tinymlgen
```

### Use

```python
from tinymlgen import port

if __name__ == '__main__':
tf_model = create_tf_model()
c_code = port(tf_model)
```

### Configuration

You can pass a few parameters to the `port` function:

- `optimize (=True)`: apply optimizers to the exported model.
Can either be a list of optimizers or a boolean, in which case
`OPTIMIZE_FOR_SIZE` is applied
- `variable_name (='model_data')`: give the exported array a custom name
- `pretty_print (=False)`: print the array in a nicely formatted arrangement


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27 changes: 27 additions & 0 deletions setup.py
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from distutils.core import setup
setup(
name = 'tinymlgen',
packages = ['tinymlgen'],
version = '0.1',
license='MIT',
description = 'Generate C code for microcontrollers from Tensorflow models',
author = 'Simone Salerno',
author_email = '[email protected]',
url = 'https://github.com/eloquentarduino/tinymlgen',
download_url = 'https://github.com/eloquentarduino/tinymlgen/archive/v_01.tar.gz',
keywords = ['ML', 'microcontrollers', 'tensorflow', 'machine learning'],
install_requires=[
'tensorflow',
'hexdump'
],
classifiers=[
'Development Status :: 3 - Alpha',
'Intended Audience :: Developers',
'Topic :: Software Development :: Code Generators',
'License :: OSI Approved :: MIT License',
'Programming Language :: Python :: 3',
'Programming Language :: Python :: 3.4',
'Programming Language :: Python :: 3.5',
'Programming Language :: Python :: 3.6',
],
)
1 change: 1 addition & 0 deletions tinymlgen/__init__.py
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from tinymlgen.tinymlgen import port
35 changes: 35 additions & 0 deletions tinymlgen/tinymlgen.py
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import re
import hexdump
import tensorflow as tf


def port(model, optimize=True, variable_name='model_data', pretty_print=False):
converter = tf.lite.TFLiteConverter.from_keras_model(model)
if optimize:
if isinstance(optimize, bool):
optimizers = [tf.lite.Optimize.OPTIMIZE_FOR_SIZE]
else:
optimizers = optimize
converter.optimizations = optimizers
tflite_model = converter.convert()
bytes = hexdump.dump(tflite_model).split(' ')
c_array = ', '.join(['0x%02x' % int(byte, 16) for byte in bytes])
c = 'const unsigned char %s[] DATA_ALIGN_ATTRIBUTE = {%s};' % (variable_name, c_array)
if pretty_print:
c = c.replace('{', '{\n\t').replace('}', '\n}')
c = re.sub(r'(0x..?, ){12}', lambda x: '%s\n\t' % x.group(0), c)
c += '\nconst int %s_len = %d;' % (variable_name, len(bytes))
preamble = '''
#ifdef __has_attribute
#define HAVE_ATTRIBUTE(x) __has_attribute(x)
#else
#define HAVE_ATTRIBUTE(x) 0
#endif
#if HAVE_ATTRIBUTE(aligned) || (defined(__GNUC__) && !defined(__clang__))
#define DATA_ALIGN_ATTRIBUTE __attribute__((aligned(4)))
#else
#define DATA_ALIGN_ATTRIBUTE
#endif
'''
return preamble + c

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