CHANGELOG

On-going
- GVSOC
	- Testbench: added new proxy commands for interacting with uart.
	- Testbench: added multi-channel support with libsnd file input and output files.
	- ISS: Improved div timing model to take parameter value into account.
	- ISS: Added shared FPU model (not yet calibrated)

3.7.1

Highlights of this release:
- NNTool
	- Expressions: fuse sequences of piecewise TFLite operators into a single Autotiler layer call
	- Resizer: insert an image resizer in front of the network (algorithms: Bilinear or Nearest Neighbor)
	- Support for Nearest Neighbor tflite node
	- Support for LeakyReLU tflite node
	- Bug fixes

- Autotiler
	- Nearest Neighbor algorithm for resizer

- PulpOS
	- Fixed issue with GPIO callbacks, some registers were corrupted after the execution of the callback

- GVSOC
	- Cache flushing is now implemented

- FreeRTOS
	- SPI copy API fixes for SPIRAM
	- Important optimizations for Freertos
	- Freertos Directory tree reorganisation


3.7
Highlights of this release:
- NNTool
	- Support TFLite SSD Detection PostProcess layer
	- Bug fixes


3.6

Highlights of this release:
- NNTool       
	- Support for TFLite RNN and LSTM layers (UnidirectionalSequenceLSTM)
	- WIP: TFLite SSDPostProcess and StridedSlice Layers (not end to end support but execution working on nntool)
	- Bug fixes

3.5.1

Highlights of this release:

- NNTool
	- nodeoption support for the memory location of the locals parameters in the AutoTiler
	- Update Documentation
	- Bug fixes
	
3.5

Highlights of this release:

- NNTool
	- Added new quantization scheme with scaling factors (tflite quantization-like)
	- Support import tflite (1 or 2) quantized graphs (uint8)
	- New adjust algorithm to support more general reshape/transpose layers
	- Added Autotiler layer for input image formatting (HWC uint8 -> CHW int8/int16)
	- Support multi-inputs network execution
	- Support for new tensor dumping routines in AutoTiler
	- Support for generation of model using SQ8 AutoTiler generators
	- Bug fixes

- Autotiler
	- New SQ8 kernel set supporting scaled quantization
	- Tensor dumping from any memory area
	- Several bug fixes

3.4

Highlights of this release:

- PMSIS
	- Uart driver: SW flow control support has been added with GPIOs
	- I2S driver: Added support for external clock
	- FC stack size can now be customized
	- Added driver for L2 to L2 and L2 to FC TCDM transfers

- BSP
	- Added support for SPI RAM and SPI flash.

- OpenOCD
	- Now used by default

Bug fixes:

- PulpOS
	- FC stack was not aligned on 8 bytes, leading to issues with printf with floats.
	- Compilation on gap8 v2 and v3 were done with v1 config
	- "make flash" is now flashing binary and FS to flash

- FreeRTOS
	- Cluster DMA: Better transfer ID affectation. In IRQ handler, when a transfer was done, next transfer was not popped out.

3.3

Highlights of this release:

- Autotiler:
	- Generators api changed, now the fixed point format is passed when generating the code:
		In_Q: In fixed point format
		Filter_Q: Filter fixed point format
		Bias_Q: Bias fixed point format
		Out_Q: Out fixed point format
		For CNN_ConvolutionPoolReLU:
		bias norm si calcualted as Filter_Q+In_Q-Bias_Q
		while output adjust is calculated as Filter_Q+In_Q-Out_Q
		for multiplicative bias you can see formula in generators.
	- Added swish activation
	- Added relu6 activation
	- Added leaky relu activation
	- Added sigmoid activation
	- Lots of bug fixing

- NNTool
	- Support for new autotiler generators and new activations.
	- Support for mul scaling.

3.2.2

Bug fixes:

- Proper closing of bluetooth module, and few instabilities.

3.1

Highlights of this release:

- OpenOCD:
	- Added OpenOCD porting for GAP8.
	- Applications can be loaded and started or uploaded to flash through JTAG.
	- Printf and file IOs with the workstation are available with semi-hosting.
- PMSIS
	- Added I2S driver.
	- Added PWM driver.
- BSP:
	- Read FS can now be mapped to the workstation using semi-hosting.
	- Added driver for Lynred Thermeye thermal detector.
- GVSOC:
	- Added support for OpenOCD semi-hosting, to support printf and file IOs from workstation.
- Applications
	- Added JPEG encoder example.
- Toolchain
	- Now available precompiled for Ubuntu18