With regard to the 1452 sampling rate, there is no signal at 96k, and 48k is normal
The development board adopts a crystal oscillator of 24.576MHz, which can be used normally with a 48k sampling rate, and there is no signal with a 96k sampling rate. Attach items。Using the oscilloscope, the clock can detect 24MHz, LRCLCK 96K, and BCLK 6.175MHz. If it is normal, there should be a signal. Find the solution
Design 2.dspproj
Audio Signal Processors
adau1452
software
sigmaStudio 4.7
SigmaDSP Audio Processors
Hello liangsea,
One thing I noticed in your project is that you set the start pulse as Base_fs * 2. It has to be set as Base_fs. Because when you set your N/M ratio as 1/3 then your Base rate becomes 96kHZ. So you can't set Base_fs *2 to match with 96KHZ. However, I don't think this caused this problem. Any way please correct that. Or did you purposely set it like that?
liangsea said:
Using the oscilloscope, the clock can detect 24MHz, LRCLCK 96K, and BCLK 6.175MHz. If it is normal, there should be a signal
You mean that , there is no signal on the SDATA OUT1 pin ? There is no data signal coming out of that pin? Or you are not getting a signal at the out of the CODEC ? If it is , then your codec is getting the MCLK from the DSP ?
Can you please verify that if you can see your input signal at SDATA IN0 ? You can also check that by adding some meters in your project. which clarifies that your signal has got in to the core. This way we can debug few things.
Does your system need an ASRC? Where are you getting your inputs from?
Regards,
Harish
Hello liangsea,
Can you help Harish and myself by letting us know which evaluation board you are using?
Chances are if you are looking for the signal at the analog output, then you do not have the codec set to operate at 96kHz. How to do that will vary with the eval board you have.
Consult the user guide for the eval board.
Dave T
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