How to regenerate TfLM

HPS uses Tensorflow Lite for Microcontrollers.

The instructions for building a TfLM library are in the TfLM documentation. We use the person_detection_int8 example as our reference.

To update the version of tflm used:

  1. Run:
make -f tensorflow/lite/micro/tools/make/Makefile generate_projects

  1. Copy tensorflow/lite/micro/tools/make/gen/linux_x86_64/prj/person_detection_int8/make into the third_party/tflm_gen directory.

  2. Update the README_VERSION.md file to third_party/tflm_gen explicitly identifying the TfLM version used.

  3. Merge the Makefile changes, so that TfLM is built with the RISCV toolchain.

The ‘litex_shim’ directory

The litex_shim directory contains additional files to allow TfLM to work with the hps_soc.

In particular, it contains example data files for the pdti8 person detection model.

To do

  1. Work out a scheme for overlaying accelerated ops onto TfLM dirs or otherwise keeping track of patches.