Search found 65 matches

by shaileshwankhede
Fri Mar 17, 2017 5:46 am
Forum: Q&A
Topic: How to add USB Serial port to XMOS Reference Audio project ?
Replies: 18
Views: 35466

Re: How to add USB Serial port to XMOS Reference Audio project ?

Wow! Its working in windows 10 too.
Thank you so much!

Regards,
Shailesh
by shaileshwankhede
Wed Mar 08, 2017 12:49 pm
Forum: Q&A
Topic: How to add USB Serial port to XMOS Reference Audio project ?
Replies: 18
Views: 35466

Re: How to add USB Serial port to XMOS Reference Audio project ?

Hi Mario,

Thank you so much. Your project worked. I verified it under Linux and its working fine.
However there seems to be problem running serial device in windows. I get device status as: This device cannot start. (Code 10)
A device which does not exist was specified.


Thanks,
Shailesh
by shaileshwankhede
Wed Feb 22, 2017 2:31 pm
Forum: Q&A
Topic: Changing lib_mic_array fir_coefs for user defined frequency response
Replies: 8
Views: 8496

Re: Changing lib_mic_array fir_coefs for user defined frequency response

Yeah I analyzed that and with bode plot calculator given in: http://www.onmyphd.com/?p=bode.plot for different values alpha obtained from MIC_ARRAY_DC_OFFSET_LOG2, but this doesn't server to be good High pass filter as required. Currently I override default MIC_ARRAY_DC_OFFSET_LOG2 value to 6. Resul...
by shaileshwankhede
Wed Feb 22, 2017 12:00 pm
Forum: Q&A
Topic: Changing lib_mic_array fir_coefs for user defined frequency response
Replies: 8
Views: 8496

Re: Changing lib_mic_array fir_coefs for user defined frequency response

Sorry for multiple questions. But do you know how alpha is dependant of high pass filter cutoff? As per document, dc offset removal is implemented as single pole IIR filter given by: Y[n] = Y[n-1] * alpha + x[n] - x[n-1] If I remember dsp correctly, this will have one Zero at value 1 and one Pole at...
by shaileshwankhede
Wed Feb 22, 2017 11:19 am
Forum: Q&A
Topic: Changing lib_mic_array fir_coefs for user defined frequency response
Replies: 8
Views: 8496

Re: Changing lib_mic_array fir_coefs for user defined frequency response

Does dc offset removal equivalent to high pass filtering. I think it will only remove dc bias and thus zero frequency(dc) only.
Anyway this term is also useful to me as I am seeing some dc offset when checked signal with xSCOPE.

Thanks,
Shailesh
by shaileshwankhede
Wed Feb 22, 2017 7:59 am
Forum: Q&A
Topic: Changing lib_mic_array fir_coefs for user defined frequency response
Replies: 8
Views: 8496

Re: Changing lib_mic_array fir_coefs for user defined frequency response

Thank you very much Andrew. This solved my problem.
But with this can I suppress lower frequencies or is there any other way to do this real time without much overhead?

Thanks,
Shailesh
by shaileshwankhede
Tue Feb 21, 2017 3:43 pm
Forum: Q&A
Topic: Changing lib_mic_array fir_coefs for user defined frequency response
Replies: 8
Views: 8496

Changing lib_mic_array fir_coefs for user defined frequency response

Hi, I want mic array to consider only voice frequency in the range 130Hz to 620Hz. I tried to run script fir_design.py of lib_mic_array by changing values of parameters like --first-stage-pass-bw, --second-stage-pass-bw etc. and replace existing fir_coefs.h and fir_coefs.xc with new generated files....
by shaileshwankhede
Fri Feb 17, 2017 12:55 pm
Forum: Q&A
Topic: How to add USB Serial port to XMOS Reference Audio project ?
Replies: 18
Views: 35466

Re: How to add USB Serial port to XMOS Reference Audio project ?

Hello, Somebody from XMOS please help on this thread! I tried a lot but no luck so far. Host is able to open declared USB serial device but data communication (write and read) is not working. Below are my updated file and I am sure there is some slight miss. One more thing is Number of cores being u...
by shaileshwankhede
Thu Feb 16, 2017 2:31 pm
Forum: Q&A
Topic: How to add USB Serial port to XMOS Reference Audio project ?
Replies: 18
Views: 35466

Re: How to add USB Serial port to XMOS Reference Audio project ?

Yeah sure! Presently I can see CDC interfaces and endpoints as part of XMOS USB audio descriptor with software TDD after integration of CDC descriptor. But still CDC is not working properly. It is getting detected as COM port by Android now. But as soon as host tries to open device, connection is dr...
by shaileshwankhede
Wed Feb 15, 2017 10:30 am
Forum: Q&A
Topic: How to add USB Serial port to XMOS Reference Audio project ?
Replies: 18
Views: 35466

Re: How to add USB Serial port to XMOS Reference Audio project ?

Update: Hi Thomas, I was doing few mistakes. Now I got correct interpretation of what to be done. But now with CDC_VSP, even default USB audio is not working (device Manager shows as USB audio device cannot start). I doubted warning of running more than 6 cores, so I changed app_virtual_com() to dif...