V3.0.0

V3.0.0 - 30.08.2025

Added

• Added static initialization for all filter types

Changed

• Two pi definition replace with one from utils
• Major API changed, making more convenient

Fixed

• Resolved compiler warnings

V2.1.0

V2.1.0 - 21.01.2025

Added

• Added reset value to IIR reset API function

Fixed

• Clearing dynamically allocated memory by using calloc instead of malloc

V2.0.0

V2.0.0 - 26.10.2023

Notice

• Complete API change from V1.x.x, therefore module is not back-compatible with older versions!

Added

• Option to reset filter
• Own definition of 2*pi, as standard <math.h> has only M_PI define

Changed

• Unifying return statuses of API functions
• Convert tabs to spaces

V1.1.0

V1.1.0 - 03.11.2022

Fixed

• Added checks for invalid filter initialization
• Removed "float32_t" dependency
• Replace static asserts with C11 standard one (_Static_assert)

Todo

• Fixed-point values support

V1.0.3

V1.0.3 - 25.05.2022

Added

• Added boolean filter
• Added check for invalid RC/CR filter settings

Todo

• Fixed-point values support
• Asserts for development bug catcher

V1.0.2

V1.0.2 - 31.07.2021

Added

• Updated due to ring buffer version increase

Todo

• Fixed-point values support
• Asserts for development bug catcher

V1.0.1

V1.0.1 - 25.07.2021

Added

• Added copyright notice
• Added module version
• Added compatibility checks for needed modules

Todo

• Fixed-point values support
• Asserts for development bug catcher

V1.0.0

V1.0.0 - 19.02.2021

Added

• Initial implementation of filters
• Supported filters: RC, CR, FIR and IIR
• IIR 2nd order filter coefficient calculations (suported LPF, HPF and NOTCH)
• Calculation IIR filter gain
• Normalization of IIR filter coefficients to achieve unity gain