Fixed point rfft issue in CMSIS-DSP

Hi all, I tried the rfft for q31 fixed point. The scale of the output is different than what I thought. I use 32 pt rfft. Input is constant 2^10=1024 (in Q31). The DC term output should be 2^10 *...
Why the CMSIS DSP Matrix Multiplication outputs 0 after few iterations?

Hi. I am using the CMSIS DSP library for multiplying two matrices on the keil mcb 1800 board using MCU Xpresso IDE. I am using the external SDRAM of 16 MB for storing the result. Matrix "xmat" is...
Why the CMSIS DSP Matrix Multiplication outputs 0 after few iterations?

Hi. I am using the CMSIS DSP library for multiplying two matrices on the keil mcb 1800 board using MCU Xpresso IDE. I am using the external SDRAM of 16 MB for storing the result. Matrix "xmat" is...
CMSIS DSP FFT does not give the correct result when number of points are changed

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...
CMSIS DSP FFT does not give the correct result when number of points are changed

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...