topic Re: FFT (Fast Fourier Transform) operations on i.MXRT platforms in i.MX RT Crossover MCUs

FFT (Fast Fourier Transform) operations on i.MXRT platforms

bimal — Wed, 29 Sep 2021 13:05:31 GMT

Hi NXP Team,

I was looking for Controller/processor solution where it should support FFT (Fast Fourier Transform) operation. I require FFT operation for my algorithm to run on SPO2 and Motion sensor data.

Can you please let me know whether i.MXRT1062/64 platform can run FFT operations or not?

To provide you further insights on my requirement, as I am looking for the best possible solution. In my solution I require to Drive SDIO for Wi-Fi, UART for BLE, Several sensors on I2C, Audio in/out on I2S and customized SPI LCD. Where particular some sensor data requires FFT operations for my algorithm to derive outputs.

Re: FFT (Fast Fourier Transform) operations on i.MXRT platforms

mjbcswitzerland — Thu, 30 Sep 2021 19:34:22 GMT

You can run the ARM CMSIS DSP libraries on the i.MX RT.

https://www.youtube.com/watch?v=n-GABeILGV8&list=PLWKlVb_MqDQFZAulrUywU30v869JBYi9Q&index=6

This shows USB audio to spectrum analyser on a Kinetis K22 but I have used the same code on i.MX RTs, with 16k FFTs at sever hundred kHz real-time.Either integer or floating point - whereby the 106x's double-precision FPU gives advantages when high precision results are needed.

Regards

Mark

Re: FFT (Fast Fourier Transform) operations on i.MXRT platforms

Omar_Anguiano — Thu, 30 Sep 2021 19:45:56 GMT

Hello
Hope you are well.
Yes, the iMXRT1062/64 can support FFT operations. This can be done through the CMSIS DSP library that can be found in the SDK of your device.
You can find information about this library at these links:
DSP capabilities: https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/white-paper-dsp-capabilities-of-cortex-m4-and-cortex-m7
User manual: https://www.keil.com/pack/doc/CMSIS/DSP/html/index.html

Let me know if this is helpful, if you have more questions do not hesitate to ask me.
Best regards,
Omar