lib_mic_array change log ======================== 5.5.0 ----- * CHANGED: Documentation updated * CHANGED: Renamed examples to app_ * CHANGED: Renamed the scripts/ directory to python/ * Changes to dependencies: - lib_xcore_math: 2.3.0 -> 2.4.0 5.4.0 ----- * CHANGED: All examples now build under XCommon CMake build system * ADDED: Will build without errors for XS2 targets but no API available * DEPRECATED: Previously used custom CMake build support. This will be removed in future versions. Please use XCommon CMake build system as provided in XTC 15.3.0 onwards for new projects. * Changes to dependencies: - lib_xcore_math: 2.0.0 -> 2.3.0 5.3.0 ----- * FIXED: Vanilla configuration now compiles correctly under XTC 15.3.0 * ADDED: Support for XCommon CMake build system 5.2.0 ----- * Added 48 kHz decimator design script * Added documentation to cover 32 kHz and 48 kHz deciamtors 5.1.0 ----- * Added 16ch de-interleave to support 16 DDR mics on a single 8b port * Added parallel decimation use example * Fixed documentation generation issues 5.0.3 ----- * Improved default audio filter. Reduces noise floor and improves alias attentuation * Changed DCOE filter to increase attenuation below 20 Hz 5.0.2 ----- * Documentation improvements. 5.0.1 ----- * Updates lib_mic_array to use lib_xcore_math (formerly lib_xs3_math) version 2.0.2 * Updates CMake project to use CPM to obtain dependencies (when top level project) * [issue #171] Changes behavior when mic array consumer gets backed up from a quiet deadlock to an ECALL exception * Also adds a way to allow blocks of PDM to be quietly dropped instead (see AssertOnDroppedBlock()) 5.0.0 ----- * Mic Array library redesigned from scratch to make efficient use of XMOS XS3 architecture * Many unused features from previous versions have been dropped * Initial v5.0 features: * Supports 1-, 4-, and 8-bit ports * Supports both SDR and DDR microphone configurations * Use 1-16 PDM microphones * Configurable PDM clock frequency * Configurable two-stage decimating FIR * Reference filter with total decimation factor of 192 provided * Optional DC offset elimination filter * Configurable frame size (down to single sample) * Extensible C++ design * Changes to dependencies: - lib_dsp: Removed dependency - lib_logging: Removed dependency - lib_xassert: Removed dependency - lib_xcore_math: Added dependency 2.0.0 4.3.0 ----- * CHANGED: Use XMOS Public Licence Version 1 * FIXED: Compiler warnings when MIC_DUAL_ENABLED is not defined 4.2.2 ----- * CHANGED: Pin Python package versions * REMOVED: not necessary cpanfile 4.2.1 ----- * CHANGED: Jenkinsfile pinned to Jenkins shared library 0.10.0 * CHANGED: Updated the minimum version of libraries this library depends upon. 4.2.0 ----- * ADDED support for global define to set single/dual output buffer for mic_dual 4.1.0 ----- * Added mic_dual, an optimised single core, 16kHz, two channel version (not compatible with async interface) 4.0.0 ----- * ADDED: Support for arbitrary frame sizes * ADDED: #defines for mic muting * ADDED: Non-blocking interface to decimators for 2 mic setup * CHANGED: Build files updated to support new "xcommon" behaviour in xwaf. 3.2.0 ----- * Added xwaf build system support * Cleaned up some of the code in the FIR designer. * Removed fixed gain in examples * Update VU meter example * Fix port types in examples * Set and inherit XCC_FLAGS rather than XCC_XC_FLAGS when building library 3.1.1 ----- * Updated lib_dsp dependancy from 3.0.0 to 4.0.0 3.1.0 ----- * Modified the FIR designer to increase the first stage stopband attenuation. * Cleaned up some of the code in the FIR designer. * Updated docs to reflect the above. 3.0.2 ----- * Update DAC settings to work for mic array base board as well. 3.0.1 ----- * Filter design script update for usability. * Documentation improvement. * Changed DEBUG_UNIT to XASSERT_UNIT to work with lib_xassert. * Added upgrade advisory. * Added dynamic range subsection to documentation. 3.0.0 ----- * Added ability to route internal channels of the output rate of the mic_array to the mic_array so that they can benefit from the post processing of the mic_array. * Enabled the metadata which delivers the frame counter. * Small fix to the filter generator to allow the use of fewer taps in the final stage FIR. * Added significant bits collection to the metadata. * Added fixed gain control through define MIC_ARRAY_FIXED_GAIN. * Tested and enabled the debug mode for detecting frame dropping. Enabled by adding DEBUG_MIC_ARRAY to the Makefile. * Moved to using types from lib_dsp. * Bug fix in python FIR generator script resulting in excessive output ripple. * Default FIR coefficients now optimised for 16kHz output sample rate. * Added ability to remap port pins to channels. * MIC_ARRAY_NUM_MICS is now forced to a multiple of 4 with a warning if it changed. * Corrected MIC_ARRAY_DC_OFFSET_LOG2 default value reporting in documentation. * Changes to dependencies: - lib_dsp: Added dependency 3.0.0 2.0.1 ----- * Updated AN00221 to use new lib_dsp API for FFTs * Updates required for latest lib_mic_array_board_support API 2.0.0 ----- * Renamed all functions to match library structure * Decimator interface functions now take the array of mic_array_decimator_config structure rather than mic_array_decimator_config_common * All defines renames to match library naming policy * DC offset simplified * Added optional MIC_ARRAY_NUM_MICS define to save memory when using less than 16 microphones 1.0.1 ----- * Added dynamic DC offset removal at startup to eliminate slow convergance * Mute first 32 samples to allow DC offset to adapt before outputting signal * Fixed XTA scripte to ensure timing is being met * Now use a 64-bit accumulator for DC offset removal * Consolidated generators into a single python generator * Produced output frequency response graphs * Added 16 bit output mode 1.0.0 ----- * Major refactor * FRAME_SIZE_LOG2 renamed MAX_FRAME_SIZE_LOG2 * Decimator interface now takes arrays of streaming channels * Decimators now take channel count as a parameter * Added filter designer script * Documentation updates * First stage now uses a FIR decimator * Changed decimation flow * Removed high res delay module * Added generator for FIR coefficients * Added ability to reduce number of channels active in a decimator * Increased number of FIR taps * Increased output dynamic range 0.0.2 ----- * Documentation fixes * Fixed frame number fix * Added frame metadata 0.0.1 ----- * Initial Release * Changes to dependencies: - lib_logging: Added dependency 2.0.0 - lib_xassert: Added dependency 2.0.0