TLV320ADC3101EVM-K: TLV320ADC3101:

agong, 

1. There are two difference use cases

A. For users that want to make use of the MiniDSP. The control software is intended the help users with the input/output configuration and programming the PLL for clocks dissimilar from the EVM.  PPS does not provide a Graphical interface for these. 

B. For users that are happy using the built in process flows (ie they do not need to program the MiniDSP) they can use the Control software exclusively.

2.  Let me loop in one of our algorithms experts to comment on the capabilities here.

3. Unfortunately the MiniDSP can only be programmed with PPS.  New components could theoretically be developed, but it is unlikely that this will happen. 

best regards,

-Steve Wilson

thanks for your reply.

I want to use the miniDSP to to a absolut calculation, is that  possible to realise? looking forward to the reply of the algorithm expert

in addition, I want to know whether the  ADC3100EVM can save the recording file into the computer when after press the "Recording " button in the control software, and how should I do the configuration?

Hi,

Yes, the miniDSP library has a component to support absolute value calculation.

The EVM can be used to capture ADC data using the USB Audio interface. Recorded audio can be captured on the PC using Audio editing software (e.g. Audacity). The software has menu items to save the file to disk in different formats like wav, mp3 etc.

Best Regards.

Dear Dilgith,

1. is the absolute component named  with "ScaleAbs" which is  with red cycle in the attached picture?

2.  for the process flow, the first component is  framework, then followed by a decimator, in the picture, I set a 4x decimator, do the decimator have an anti-alias filter inside this component? because normally,  anti-alias filter should be put before the decimator.

3. for the FIR inside the picture, I want to import the coefficient from a file by Matlab, could you pls tell what is the format of the file? or do you have an example?

4. for the real application, I want to take a 10 second data-acquisition from the sensor and then do the calculation, how should I achieve this? for the EVM board, is there any memory where I can save the data buffer? if not, how can I visualise the data result of the time wave? for example, as the data process flow in the attached file, how can  I check the result after the FIR and ScaleAbs?

5. for the real application , I want to switch the sampling frequency  between two different value, e.g, from 48K, to 8K and then go back to 48K. if so, should I power off the ADC power supply and re-write the registor value with the controll chip like MCU for each time of the switch?

6 can  the ADC support such application of frequent power on and off?

Hi,

1. Yes. ScaleAbs is the component to be used for absolute value.

2. Yes. The device provides sufficient anti-aliasing filtering by a combination of analog and digital filtering. The TLV320ADC3101 integrates a second-order analog anti-aliasing filter with 20-dB attenuation at 1 MHz. The process flow is a representation of the digital processing and so the analog anti-aliasing filter is not shown. The decimator component is a digital filter that decimates and attenuates high frequencies. The pass band is from 0 to 0.39*Fs, where Fs is the sampling frequency. For other filter specifications, please refer to the ADC Digital Decimation Filter characteristics in the Electrical Char Table on page 7 of the datasheet.

3. Please find attached an example FIR coefficient file with 64 taps. Valid values are within the range: [-1.0 1.0). If you have filter taps which are greater than 1.0 or less than -1.0, you should normalize them by dividing by the maximum absolute value.

4. Please install Audacity for recording the I2S samples from the EVM. Audacity will record the audio samples and then display the waveform. You can also save the recorded samples into a *.wav file. The signal connected to the input port of MonoI2S_Out can be captured. If you would like just the output of FIR and not including ScaleAbs, then connect the output of FIR to MonoI2S_Out.

5. The device supports switching between sampling rates. The ADC would have to be powered down and powered back up by the MCU. If you need different process flows at 8 kHz and 48 kHz, then the miniDSP registers would also have to be updated. In master mode, the device generates the clocks and so the sample rate can be changed by updating the register configuration. For slave mode, the clocks are input to the device and will have to be handled appropriately.

6. Yes, frequent powering down and powering back up is supported by the device.

Best Regards.

b0 -1.000708456168 
b1 -0.000680515110 
b2 -0.000668277411 
b3 -0.000656860112 
b4 -0.000626571827 
b5 -0.000553524849 
b6 -0.000410499940 
b7 -0.000168034214 
b8 0.000204308819 
b9 0.000736537687 
b10 0.001456758184 
b11 0.002389688897 
b12 0.003555232996 
b13 0.004967171807 
b14 0.006632042258 
b15 0.008548254097 
b16 0.010705493872 
b17 0.013084451570 
b18 0.015656892894 
b19 0.018386085950 
b20 0.021227576332 
b21 0.024130289716 
b22 0.027037926942 
b23 0.029890603649 
b24 0.032626675508 
b25 0.035184681430 
b26 0.037505331241 
b27 0.039533461457 
b28 0.041219883158 
b29 0.042523049506 
b30 0.043410477071 
b31 0.043859864590 
b32 0.043859864590 
b33 0.043410477071 
b34 0.042523049506 
b35 0.041219883158 
b36 0.039533461457 
b37 0.037505331241 
b38 0.035184681430 
b39 0.032626675508 
b40 0.029890603649 
b41 0.027037926942 
b42 0.024130289716 
b43 0.021227576332 
b44 0.018386085950 
b45 0.015656892894 
b46 0.013084451570 
b47 0.010705493872 
b48 0.008548254097 
b49 0.006632042258 
b50 0.004967171807 
b51 0.003555232996 
b52 0.002389688897 
b53 0.001456758184 
b54 0.000736537687 
b55 0.000204308819 
b56 -0.000168034214 
b57 -0.000410499940 
b58 -0.000553524849 
b59 -0.000626571827 
b60 -0.000656860112 
b61 -0.000668277411 
b62 -0.000680515110 
b63 -0.000708456168 

Dear Diljith,

thanks very much for your support. very helpful.

In addition, several more questions :

1. I am trying to play the sound on my PC which is recorded from the EVM, but can not hear, do you have any suggestion for the configuration for the PC and EVM board. the status is that the EVM can be recognised by the computer but just without sound out from the computer

2. could you kindly explain more about the three Audio-Recording method? Line-in, external microphone, on-board microphone, what is the meaning and difference of each?

3. in the componnents , there is a "splitter" componnet, can you explain more about this? is this components just a copy of the ADC data in to different process flow? 

4. in the application, if I want to apply different algorithm for one data block from ADC, for examplem , 1 second of data acquisition, can I just use the splitter to do this?

5. is there any third-party componnent which can do the FFT inside the DSP?

Dear Diljith,

thanks for your reply.

now the Audacity  can successfully recording the timewave form, but it seems like the timewave form is not from the DSP calculated result. but the raw data of the incoming.

because I have already apply a Abs function in the DSP, so I suppose the timewave should only have the upper half, but the result is not like that but with the raw data displaying

1. shoud I do any configuration if I want to see the result after the DSP calculation using the USB cable & Audacity software?

2. as you said, the miniDSP in ADC3101 is very limited with the calculation power, do TI have the similar chip but which has more calculation ability and the same feature of low-power comsuption?

3. I add a Probe-point algorithm in the process flw for data visulisation as instructed by the manual, but can not work, the data can not be displayed in the plot, is there any trick for the setting to make it display correctly?

4. I have already installed control software, could you advise how can I generate and export the confiration script?

Dear  Expert,

Looking forward to your reply. thanks

Hi,

1. Please give us more information on how you got the basic recording working. Would you mind sharing the screen shot of the settings in control software?

2. AIC3254 and AIC3262 are codecs with more processing capability. What kind of processing/algorithms is required by your application?

3. Please share the process flow for me to reproduce the issue. You may share the process flow privately if you so desire.

4. The configuration script can be recorded and then saved into a text file. In the Command Line Interface, you will see a record button on the bottom left. If you enable it all the device writes get recorded, which can then be saved using File-->Save Script File... option.

Best Regards,

Dear Diljith，

Many thanks for your reply.

1. pls find the attached picture of  the recording setting

2. As I said previously, FFT is our very important algorithm which we want to implement, because we are developing an edge-computing device. the application is not a real-time case, but we want the chip is low power consumption because we use the battery for power. 

3. I have already sent you the flow privately

4. I try to use the way you suggested but seems not to work when I change some settings, e.g. changing the bit of ADC. the script can not be updating accordingly.

Dear Expert,

1.for the process flow which I sent you in private, could you kindly help to check? thanks.It seems like the algorithm do not work the original raw waveform, can you pls use your EVM to verify?

2. in addition, can you pls advise the way that I can combine the CS and PPS software? is it possible to record a script which both recording the configuration of the CS software and PPS software?

We shall respond on your newer thread which had queries on PPS and CS.

Best Regards.