MCU-PLUS-SDK-AM273X: HWA2.0 for FFT and other Signal Processing

Hi Ming,

Thank you so much for your quick response and helpful sample projects and HWA link.

I will import the sample project you suggested and learn more about HWA from your URL link.

FYI, at first I searched and found the sample code at: C:\ti\mcu_plus_sdk_am273x_09_02_00_60\examples\sdl\hwa\hwa_main. When I got into the code, I noticed it's with the DMA. I even couldn't find the README file in the project. 

What's the difference between the sample projects between the one under ...\examples\sdl\hwa and one under ...\examples\sdl\hwa?

Best regards,

Lin

Hi Ming,

Thanks for your answer and information.

Best regards,

Lin

Hi Ming,

After reading the URL link of the HWA and checking the readme of the sample projects, I found that hwa_real_fft is most close to our purpose.

At this stage we don't want to use the EDMA function. And as you know we have already configure the AD7389-4 via SPI signal. Now we can get 4 channels of raw data from the AD7389-4 and buffered data as convertedData[SAMPLES][CHANNELS] (1024 X 4).

Could you give us your suggestion how we can integrate the convertedData[ ][ ] array into the sample hwa_real_fft project without EDMA? It's a kind of combination of sample mibspi_loopback project and hwa_real_fft project.

Appreciate your help and support.

Best regards,

Lin

Hi Ming,

I may make a unreasonable request to disable the EDMA in the sample project in my last message. It seems there are lots of code related to EDMA. 

If it's hard to do that I will keep use the EDMA and replace the input data sine_wave_peak_17_bin and audio_1031Hz_and_5156Hz with my own data.

Any advice or instruction is appreciated.

Best regards,

Lin

Hi Ming,

May I ask a quick question. What's the sampling rate of the sample data sine_wave_peak_17_bin and audio_1031Hz_and_5156Hz in the hwa_real_fft project?

Best regards,

Lin

Lin Li said:

May I ask a quick question. What's the sampling rate of the sample data sine_wave_peak_17_bin and audio_1031Hz_and_5156Hz in the hwa_real_fft project?

From the name of the data file, it seems to be the mix of 1031hz audio and 5156hz audio. You should be able to tell after it does the FFT. You can also draw the data using CCS graph feature. In fact, the sampling rate is not important here. The number of samples is important.

Lin Li said:

I may make a unreasonable request to disable the EDMA in the sample project in my last message. It seems there are lots of code related to EDMA. 

If it's hard to do that I will keep use the EDMA and replace the input data sine_wave_peak_17_bin and audio_1031Hz_and_5156Hz with my own data.

Please de-interleave the data first, then use the de-interleaved data for hwa_real_fft.

Hi Ming,

Where / How can I get the CCS graph feature? That will be helpful for my test.

Best regards,

Lin

Hi Ming,

Thanks for the link. I will study it.

Best regards,

Lin

Hi Ming,

I can't find the Tools menu in the CCS. Any hint for it?

Best regards,

Lin

Hi Ming,

Thank you so much for your quick reply.

Yes, I see the Tools menu in the Debug perspective. 

However, I can't get the expected graph. I get the FFT magnitude array and open the Tools -> graph -> single time as shown below. The data is correct and you can see the mag[17] has the max value. The left side is my setting in the graph tool. 

I got following graph.

Could you help me to check if anything wrong in my setting or I miss something.

Best regards,

Lin

The Data Type should have been the float, not signed 32-bit integer.

Hi Ming,

After changing that, I got it.

Appreciate your help and support.

Best regards,

Lin