• RFFT CMSIS-DSP - Fluctuating index
    I am using the Cortex M4 with CMSIS 5.4.0 DSP library. I'm using the arm_rfft_f32() function and the max_arm_f32() function to compute the maximum frequency bin of injected pure sine wave with an external...
  • Process ADC data, moved by DMA, using CMSIS DSP: what's the right way?
    Hi to you all, I've a firmware running on a NXP LPCLink2 (LPC4370: 204 Mhz Cortex M4 MCU ) board which basically does this: Fills the ADC FIFO @40msps. Copies the data into memory using the built-in DMA...
  • CMSIS-DSP on ARMv8-m
    Hi, I'm reading through the sources of CMSIS-DSP and came across the following question: The define of "ARM_MATH_DSP" is only set if the target architecture is "ARM_ARCH_7EM". Does this mean, that all...
  • CMSIS DSP - Realtime FIR Filter, Sample by Sample Issue
    I'm trying to implement a realtime lowpass FIR filter using the CMSIS library. I'm essentially following this example : The only difference is that instead of running the filter on a block of samples...
  • How to determine CMSIS version?
    I have a project with CMSIS already integrated - I would like to find which version of CMSIS - how do I do that? I thought perhaps the file: https://github.com/ARM-software/CMSIS_5/blob/develop/CMSIS...