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 functions defined for ARM_MATH_DSP are not used…

I'm trying to use the CMSIS DSP library to compute a DCT, however I don't understand how it works.

Namely what I don't understand is the pointer to the state buffer. What is this state buffer? It's an input parameter, what should be in that buffer…

I have a code that computes FFT using fftpack functions npy_rffti and npy_rfftf . I want to replace them using arm library functions. I have a real signal. I wrote the below code.

arm_rfft_fast_instance_f32 rfft_instance;

arm_rfft_fast_init_f32…

Hello,

I am using TI Hercules Evaluation Board TMS570LS0714 which is ARM Cortex R. For this processor TI provides pre-compiled libraries, available at http://www.ti.com/tool/HERCULES-DSPLIB .I am able to add these libraries to my project in code composer…

I have been trying to use the RFFT functions in the CMSIS DSP library which has been giving me some confusing outputs.

From the documentation:

Looking at the data, we see that we can uniquely represent the FFT using only N/2 complex numbers. These are…

My colleagues from the Arm Digital Signal Processing (DSP) software team have introduced a Python wrapper for the CMSIS-DSP library that is compatible with NumPy. The CMSIS-DSP library is a rich collection of DSP functions that Arm has optimized for the…

Hello all,

I am trying to implement DSP on the STM32F411RE Nucleo board, for which I would require the use of the CMSIS library. I am trying to get this to work by setting up the STM32 in CubeMX (setting Clock, HAL, DMA, but most crucially setting the…

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 CODEC. SSI0 and uDMA are being used to take in…

Hi.

I'm a robot engineer and I usually use MCUs such as nrf52832(cortex-M4f) or ST32f407(cortex) to use various sensors. 

Since those MCUs have an FPU inside, calculating time was quite fast without any burdensome optimizations. 

The problem is, I have to…

Hello,

I am looking to do a moving average function using DSP instructions of ARM Cortex M7. Unfortunately I couldn't find a direct example. My goal is to have variables for

- the sum

- the new value

- the oldest value

Then the algorithm is sum =…

I am trying to implement the DCT Type IV documented here on a nordic DK but cannot figure out how to use this function. Does anyone have an example of this being used? I am most confused about the state buffer, inline buffer and initialization functions…

Did you know that there are 23 billion IoT embedded devices currently deployed around the world? This figure is expected to grow to a whopping 1 trillion devices by 2050!

Less known, is that 80% of IoT devices are based around Arm’s Cortex-M microcontroller…

用的库是arm_cortexM4lf_math.lib。我看到有外国佬三年多之前就问过了，但是为什么现在都没解决