I am getting everything going, sort of. But the one thing I cannot make work is the signal processing. The software, I downloaded from your website http://www.ti.com/litv/zip/slac248b, lets me control everything but the signal processing. I pick a processing block as directed, but when I try to select filter types, nothing happens. I can select a filter type, but that is all I can do. Everything else stays grayed out to further define the filter I want. Any suggestions
Thank you,
Adam
Hi Adam,
There could be a few different problems here. First, it could be the drivers. I would make sure that the customer has the most up to date National Instruments (NI) VISA drivers.
Available at: http://sine.ni.com/psp/app/doc/p/id/psp-411
I would also make sure they have the most up to date TI drivers: ti.com/litv/zip/slac521
Also, there is an error message box in the GUI, and looking at the screenshot you sent me, we might be able to get some more information from that: (Circled in the image below):
If the customer is interested in knowing what registers are affected when loading the AGC from the GUI, they can use the Command-Line Interface to record all of the individual commands.
As for the high pitch tone, its hard to tell what it could be. This could be due to feedback, is this microphone within range of an output speaker to listen to the mic?
Regards,
~John
John,
Downloaded it all, to no avail. Same problem
Below is a picture of the screen showing the errors when I try to run it.
Adam
Setup:
Windows 7 laptop
ADC3101 v1.20 installed with Administrator rights, drivers installed, running in compatibility mode, everything works
USB-MODEVM updated to latest v3.03 firmware, 44.1kHz image, TLV320ADC3101 daughter board
Procedure:
ADC3101 GUI is run, successfully connects to the board, We can read registers, run scripts, download firmware, change EVM name, etc. successfully.
We run the Audio Recording Quick-start and load the settings for internal microphone. Everything works, and we can capture audio from the microphones, into the PC through USB
Then we start the Biquad Filter Tool, configure for high pass, or low pass, or anything for that matter, calculate coefficients and download, but the audio does not get affected.
Troubleshooting Observations:
We started examining the biquad filter coefficients that should have values written to them, according to the script captured. They were all zero, explaining why the audio was not affected. We then did a little more digging to see at what point they get wiped out.
After loading the “Recording” script, we observed that the coefficient registers are all reset to zero’s (page 4 of the registers)
At reset, default values, everything seems normal:
After running the recording script. All values get wiped out and become zero
Downloading the Biquad Filter coefficients does not seem to be able to write to those registers. In fact, using the command-line interface and trying to write a single value to register 0x0E in page 4 does not go through. Any attempts to write to these registers fails after running the recording script, unless we soft reset the device.
After a lot of troubleshooting, we determined that it is when the ADC clock dividers are enabled (registers 18 and 19) that page 4 effectively gets wiped out and becomes “un-writable”. I cannot find anything in documentation that would suggest this is normal behavior. This gets done when we run the Recording script, which I’ve captured below. The highlighted command is the culprit. If I comment it out, then the biquad coefficients are written to the device successfully. Of course, the device doesn’t work properly in this case, since the ADC clock isn’t configured correctly.
w 30 00 00
w 30 01 01
w 30 00 00
w 30 12 81 82
w 30 1B 00
w 30 00 00
w 30 3D 01
w 30 00 01
w 30 33 50
w 30 34 FC
w 30 37 FC
w 30 3B 32
w 30 3C 32
w 30 00 00
w 30 51 C2
w 30 52 00
I should add, this behavior is the same on two boards that we have. However, on
one of the boards, audio is dead, even though I can read/write to the register
set as noted above
The board that is not working fully, is the one the customer received a couple of months ago. It worked in the beginning, but had a high pitch noise passing audio through, as mentioned in the earlier emails. Lucas says the noise is not there with the replacement board I gave him recently, which is good. However, the register issue described below is evident on both boards.
Any help here is appreciated
