This user manual describes the CMSIS DSP software library, a suite of common signal processing functions for use on Cortex-M processor based devices.
The library is divided into a number of functions each covering a specific category:
The library has separate functions for operating on 8-bit integers, 16-bit integers, 32-bit integer and 32-bit floating-point values.
The library installer contains prebuilt versions of the libraries in the
The library functions are declared in the public file
arm_math.h which is placed in the
Include folder. Simply include this file and link the appropriate library in the application and begin calling the library functions. The Library supports single public header file
arm_math.h for Cortex-M cores with little endian and big endian. Same header file will be used for floating point unit(FPU) variants.
The library ships with a number of examples which demonstrate how to use the library functions.
The library has been developed and tested with MDK version 220.127.116.11 The library is being tested in GCC and IAR toolchains and updates on this activity will be made available shortly.
The library installer contains a project file to rebuild libraries on MDK toolchain in the
The libraries can be built by opening the arm_cortexM_math.uvprojx project in MDK-ARM, selecting a specific target, and defining the optional preprocessor macros detailed above.
Each library project have different preprocessor macros.
Define macro ARM_MATH_BIG_ENDIAN to build the library for big endian targets. By default library builds for little endian targets.
Define macro ARM_MATH_MATRIX_CHECK for checking on the input and output sizes of matrices
Define macro ARM_MATH_ROUNDING for rounding on support functions
Define macro ARM_MATH_LOOPUNROLL to enable manual loop unrolling in DSP functions
Define macro ARM_MATH_NEON to enable Neon versions of the DSP functions. It is not enabled by default when Neon is available because performances are dependent on the compiler and target architecture.
Define macro ARM_MATH_NEON_EXPERIMENTAL to enable experimental Neon versions of of some DSP functions. Experimental Neon versions currently do not have better performances than the scalar versions.
The following files relevant to CMSIS-DSP are present in the ARM::CMSIS Pack directories:
|CMSIS\DSP\DSP_Lib_TestSuite||DSP_Lib test suite|
|CMSIS\DSP\Examples||Example projects demonstrating the usage of the library functions|
|CMSIS\DSP\Include||DSP_Lib include files|
|CMSIS\DSP\Projects||Projects to rebuild DSP_Lib binaries|
|CMSIS\DSP\Source||DSP_Lib source files|
Please refer to ChangeLog_pg.