Hello All,

I'am using  TI MCU TM4C129x  and code composer IDE.

I've integrated the CMSIS DSP library inside my code and I'am able to apply the low pass filter using arm_fir_f32() function.

My input signal is the Varying frequency Sine wave…

Hi, 

I am using CMSIS Free RTOS. 

I see osThreadFlagsSet() function is  using xTaskNotifyFromISR() and xTaskNotifyAndQueryFromISR()  APIs. I understand their usage. As per my understanding 

(void)xTaskNotifyAndQueryFromISR (hTask, flags, eSetBits, &rflags, &yield…

Hello,

I am new to DSP things and I just built my first test project. This is a low pass filter with an order of 31, so 32 coefficients. Also I have an input buffer of 32 values that I designed as a ring buffer. With these I programmed a standard FIR…

Hi,

We are working on ARM Cortex-M4 (Nuvoton NUC472) based SoC as per our requirement.We are facing one critical issue like board is not booting when we enabled and used extrenal RAM on EBI.

We have ported following BSP package with below toolchain for…

I am writing open source easy to use top level Flash drivers which are portable to use on all Cortex M0 devices (vendor independent). So I was thinking of using CMSIS flash drivers as my low level block. So are CMSIS flash driver portable on all Cortex…

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…

Hi all,

We have purchased an MPS2+ platform, and everything was going well, but since Friday we are facing an error we do not understand.

When starting the FPGA configuration (by pressing the 'ON' button on the board), leds start blinking (the screen…

Hello!

I am trying to implement IIR filter algorithms on an STM32F767. I'm using the CMSIS library for the filter algorithms and they are working as expected.

However, the execution speed is very low and I'm not sure why this is happening?

I…

Dear all,

I am on the process of switching to GNU GCC for compiling an already working project. Most of the functionality has been tested. There is a failing test though: The USB VCP drivers do not seem to perform good.

The client side (PC-Windows) is…

Hi. I have an INVPC exception that I am trying to debug on a Cortex M4 STM32. The stack contains the following values:

0x08003555 xPSR
0x08006824 PC
0x08006824 LR
0x00000000 R12
0x08003341 R3
0x08006824 R2
0xFFFFFFFD R2
0x0000FFFF R0

The PC and LR both point…

I am using Cortex-M series microcontroller and wrote my own FIFO implementations. Is there any CMSIS libraries that support common data structures like FIFO so i don't have to write my own? Obviously FIFO is not difficult at all to implement but if there…

Hi everyone!

i'm trying to add CMSIS-RTX5 in my project.

Without RTX5 the code run correctly.

Adding RTX5 the following error appears:

.\stm32_base.axf: Error: L6200E: Symbol PendSV_Handler multiply defined (by irq_cm4f.o and stm32l4xx_it.o).
.\stm32_base…

#include <stdio.h>
#include <string.h>
#include "cmsis_os.h"
 
#include "Driver_CAN.h"
 
// CAN Driver Controller selector
#define  CAN_CONTROLLER         1       // CAN Controller number
 
#define _CAN_Driver_(n)         Driver_CAN##n
#define…

Hi

I have a problem by implementing a CMSIS Biquad lowpass filter an a Cortex M4 from TI.

The CMSIS FLOAT filter is working but not the fixpoint  Q15 one.

It's just a simple 2nd order (1 stage) filter. The coeffs are calculated with Matlab.

Did anybody…

I would like to know where is the CMSIS SW stored with respect to Cortex-M3 Processor. Will it be stored inside the vendor specific on-chip flash present in MCU?

Hello,

A lot of info is out there and it makes me confused, so I just want to be sure and maybe someone can explain and provide information for this question:

If I do not have any ARM license or product purchased, is it legal for me to go to https://github…

I have used the example provided in the CMSIS DSP example for 1024 point FFT. It works and there are no issues.

Next I used Matlab to generate 1024 sample points for a 100 Hz sine wave with 10 kHz sampling. The sine wave had a peak to peak amplitude of…

Hi guys,

we use Keil RTX on a M4 core (XMC 4500) which contains a memory protection unit. We want to run some parts of the software in its own memory space. I have found the description about CMSIS-Zone (CMSIS-Zone) which should provide MPU support. In…