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Version	Description
V1.5.2	Modified arm_math.h + fixed GNU Compiler specific diagnostics. + moved __SSAT and __USAT to CMSIS-Core + +
V1.5.1	Changed copyright note. + Added ARMv8M DSP libraries. +
V1.5.0	Modified arm_math.h + + removed macro TABLE_SIZE. + changed preprocessor conditions to select functions instead of SIMD instruction for Cortex-M3. + + Modified arm_const_structs.c + + Added structure instances for the RFFT functions (equivalent to CFFT structures). + +
V1.4.10 (no source code change [still labeled 1.4.5])	Modified arm_sin_cos_f32.c + + corrected arm_sin_cos_f32() for negative numbers smaller than e-4f. + + Modified arm_var_f32.c + + improved numerical stability for arm_var_f32(). + +
V1.4.9 (no source code change [still labeled 1.4.5]) 2016/09/26	Modified arm_mat_mult_fast_q15.c, arm_mat_mult_fast_q31.c + + performance optimizations for arm_mat_mult_fast_q15() and arm_mat_mult_fast_q31(). + + Modified arm_conv_partial_q15.c + + corrected arm_conv_partial_q15() for Cortex-M7 based cores. + + Modified arm_conv_q15.c + + corrected arm_conv_q15() for Cortex-M7 based cores. + + Modified arm_correlate_q15.c + + corrected arm_correlate_q15() for Cortex-M7 based cores. + +
V1.4.8 (no source code change [still labeled 1.4.5]) 2015/12/18	Modified arm_math.h, arm_bitreversal2.S + + corrected arm_sin_f32() for very small negative input values. + + Modified arm_sin_f32.c + + Updated Texas Instruments Arm Compiler support. + + Updated documentation + + function arm_rfft_fast_f32. + +
V1.4.7 (no source code change [still labeled 1.4.5]) 2015/10/20	Modified arm_math.h + + Added explicit type casts to remove compiler warnings. + Supressed irrelevant warnings for toolchain GCC. + + Updated documentation + + functions arm_cos_f32, arm_sin_f32 use table lookup combined with linear interpolation (since V1.4.2). This is now documented. + +
V1.4.6 (no source code change [still labeled 1.4.5]) 2015/08/26	Modified arm_math.h + Updated function arm_sqrt_f32 for use with IAR. + +
V1.4.5 2015/03/19	Added support for the Cortex-M7 processor + Fixed bug in arm_mat_inverse_f32.c and arm_mat_inverse_f64.c. They weren't properly handling diagonal matrices. + arm_cfft_f32.c - help documentation updated + Updated documentation to show deprecated functions +
V1.4.4 2014/07/31	Added the following new files: + + arm_biquad_cascade_stereo_df2T_f32.c + arm_biquad_cascade_stereo_df2T_init_f32.c + arm_biquad_cascade_df2T_f64.c + arm_biquad_cascade_df2T_init_f64.c + arm_mat_inverse_f64.c + arm_cfft_q15.c + arm_cfft_q31.c + + Optimizations to the following files: + + arm_biquad_cascade_df2T_f32.c + arm_fir_f32.c + arm_fir_fast_q31.c + arm_fir_q7.c + arm_cfft_f32.c + arm_cfft_radix4_q31.c + arm_cfft_radix4_q15.c + arm_rfft_q31.c + arm_rfft_q15.c + +
V1.4.3 2014/03/12	Undid changes to arm_biquad_cascade_df1_q31.c + Added support for COSMIC + Changed 'short' to 'q15_t' where appropriate + Fixed arm_conv_partial_fast_q15.c for UNALIGNED_SUPPORT_DISABLE + Fixed arm_mat_cmplx_mult_q15.c for UNALIGNED_SUPPORT_DISABLE + Fixed arm_conv_partial_opt_q7.c for UNALIGNED_SUPPORT_DISABLE + Restored the internal fftlen of 16 to arm_rfft_fast_init_f32.c + Updated core_xxx.h files to newer versions from ARM +
V1.4.2 2013/10/16	Moved const structures from arm_const_structs.h to arm_const_structs.c + Rfft_fast_f32 no longer allows fft length of 16 as it wouldn't have worked anyways + Partial convolution was producing the wrong results in some cases + arm_lms_q31 and q15 now saturate the results in the M0 code to match the M3 & M4 code + Rfft_q15 and q31 had potential overflow issues resolved + arm_biquad_cascade_df1_q31.c had a typo which resulted in incorrect outputs + fast math sine and cosine now use linear interpolation + controller sin/cos now uses a more accurate interpolation algorithm + arm_mat_inverse was reading outside its input array + arm_cmplx_dot_prod was incorrect + switched some incorrect usages of __ssat to clip_q63_to_q31 + changed var & std q31 to downshift input data by 8 + var q31 & q15 no longer output larger data types + arm_mat_cmplx_mult_q15.c was done incorrectly for big vs little endian + arm_mat_mult_q31.c was inconsistent with the other multiplies, so added saturation + arm_conv_partial_q15 had an incorrect comparison between signed & unsigned values +
V1.4.1 2013/02/20	Updated licenses in headers to 2013 + Fixed ALIGN4 macro in arm_math.h + Added files to Cortex-M0 projects so that all projects have same file list + Fixed bugs in + + arm_biquad_cascade_d2fT_f32.c + arm_cfft_radix2_q31 + arm_cfft_radix2_f32 + arm_math.h (arm_pid functions) + arm_iir_lattice_q31.c + +
V1.4.0 2013/01/09	Updated with more optimizations, bug fixes and new license information in headers + Optimized functions: + + arm_biquad_cascade_df2T_f32 + arm_biquad_cascade_df1_q31 + arm_fir_f32 + arm_fir_fast_q31 + arm_cfft_f32 + arm_cfft_radix2_q31 + arm_rfft_fast_f32 (new function) + + Fixed compiler warnings in arm_math.h for comparing signed and unsigned ints + Fixed a saturation bug in arm_rms_q15 + Simplified the code in arm_sin_cos_q31 + Added a preprocessor directive to treat the Cortex M0+ just like the Cortex M0 + The following functions were deprecated and will be removed in a future version + + arm_cfft_radix2_f32 + arm_cfft_radix2_init_f32 + arm_cfft_radix4_f32 + arm_cfft_radix4_init_f32 + +
V1.3.0	Added CMSIS DSP Software Library + The CMSIS DSP Software Library is a suite of common signal processing functions targeted to Cortex-M processor based microcontrollers. Even though the code has been specifically optimized towards using the extended DSP instruction set of the Cortex-M4 processor, the library can be compiled for any Cortex-M processor. + For more information please see CMSIS DSP Library documentation. Added Cortex-M4 Core Support + Additional folder CM4, containing the Cortex-M4 core support files, has been added. CM0 CM3 CM4 CoreSupport DeviceSupport + New naming for Core Support Files + The new Core Support Files are: + + core_cm#.h (# = 0, 3, 4) + core_cmFunc.h (Cortex-M Core Register access functions) + core_cmInstr.h (Cortex-M Core instructions) + core_cm4_simd.h (Cortex-M4 SIMD instructions) + +
V1.2.0	Removed CMSIS Middelware packages + CMSIS Middleware is on hold from ARM side until a agreement between all CMSIS partners is found. SystemFrequency renamed to SystemCoreClock + The variable name SystemCoreClock is more precise than SystemFrequency because the variable holds the clock value at which the core is running. Changed startup concept + The old startup concept (calling SystemInit_ExtMemCtl from startup file and calling SystemInit from main) has the weakness that it does not work for controllers which need a already configuerd clock system to configure the external memory controller. + Changed startup concept + + SystemInit() is called from startup file before premain. + SystemInit() configures the clock system and also configures an existing external memory controller. + SystemInit() must not use global variables. + SystemCoreClock is initialized with a correct predefined value. + Additional function void SystemCoreClockUpdate (void) is provided. + SystemCoreClockUpdate() updates the variable SystemCoreClock and must be called whenever the core clock is changed. + SystemCoreClockUpdate() evaluates the clock register settings and calculates the current core clock. + + Advanced Debug Functions + ITM communication channel is only capable for OUT direction. To allow also communication for IN direction a simple concept is provided. + + Global variable volatile int ITM_RxBuffer used for IN data. + Function int ITM_CheckChar (void) checks if a new character is available. + Function int ITM_ReceiveChar (void) retrieves the new character. + + For detailed explanation see file CMSIS debug support.htm. + Core Register Bit Definitions + Files core_cm3.h and core_cm0.h contain now bit definitions for Core Registers. The name for the defines correspond with the Cortex-M Technical Reference Manual. + e.g. SysTick structure with bit definitions + + typedef struct + { + __IO uint32_t CTRL; + __IO uint32_t LOAD; + __IO uint32_t VAL; + __I uint32_t CALIB; + } SysTick_Type; + + /* SysTick Control / Status Register Definitions / + #define SysTick_CTRL_COUNTFLAG_Pos 16 + #define SysTick_CTRL_COUNTFLAG_Msk (1ul << SysTick_CTRL_COUNTFLAG_Pos) + #define SysTick_CTRL_CLKSOURCE_Pos 2 + #define SysTick_CTRL_CLKSOURCE_Msk (1ul << SysTick_CTRL_CLKSOURCE_Pos) + #define SysTick_CTRL_TICKINT_Pos 1 + #define SysTick_CTRL_TICKINT_Msk (1ul << SysTick_CTRL_TICKINT_Pos) + #define SysTick_CTRL_ENABLE_Pos 0 + #define SysTick_CTRL_ENABLE_Msk (1ul << SysTick_CTRL_ENABLE_Pos) + / SysTick Reload Register Definitions / + #define SysTick_LOAD_RELOAD_Pos 0 + #define SysTick_LOAD_RELOAD_Msk (0xFFFFFFul << SysTick_LOAD_RELOAD_Pos) + / SysTick Current Register Definitions / + #define SysTick_VAL_CURRENT_Pos 0 + #define SysTick_VAL_CURRENT_Msk (0xFFFFFFul << SysTick_VAL_CURRENT_Pos) + / SysTick Calibration Register Definitions / + #define SysTick_CALIB_NOREF_Pos 31 + #define SysTick_CALIB_NOREF_Msk (1ul << SysTick_CALIB_NOREF_Pos) + #define SysTick_CALIB_SKEW_Pos 30 + #define SysTick_CALIB_SKEW_Msk (1ul << SysTick_CALIB_SKEW_Pos) + #define SysTick_CALIB_TENMS_Pos 0 + #define SysTick_CALIB_TENMS_Msk (0xFFFFFFul << SysTick_VAL_CURRENT_Pos) + / end of group CMSIS_CM3_SysTick */ + DoxyGen Tags + DoxyGen tags in files core_cm3.[c,h] and core_cm0.[c,h] are reworked to create proper documentation using DoxyGen. Folder Structure + The folder structure is changed to differentiate the single support packages. + CM0 +CM3 + CoreSupport + DeviceSupport + Vendor + Device + Startup + Toolchain + Toolchain + ... + Device + ... + Vendor + ... + Example (optional) + Toolchain + Device + Device + ... + Toolchain + ... +Documentation +
V1.1.0 2012/02/15	Updated with more optimizations, bug fixes and minor API changes.
V1.0.11 2011/10/18	Bug Fix in conv, correlation, partial convolution.
V1.0.10 2011/7/15	Big Endian support added and Merged M0 and M3/M4 Source code.
V1.0.3 2010/11/29	Re-organized the CMSIS folders and updated documentation.
V1.0.2 2010/11/11	Documentation updated.
V1.0.1 2010/10/05	Production release and review comments incorporated.
V1.0.0 2010/09/20	Production release and review comments incorporated.
V0.0.9 2010/08/27	Added files: + arm_biquad_cascade_df1_fast_q15.c + arm_biquad_cascade_df1_fast_q31.c + arm_fir_fast_q31.c + arm_fir_fast_q15.c + +
V0.0.7 2010/06/10	Misra-C changes done
V0.0.5 2010/04/26	incorporated review comments and updated with latest CMSIS layer
V0.0.3 2010/03/10 DP	Initial version

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