in the BF533 spec ,there are 8 audio channels ,can I use them at the same time
the answer is yes.
I suppose that audio channels are connected to the processor via serial SPORTs interfaces.
Then you can use up to 8 audio channels simultaneously. The BF533 supports two SPORTs interfaces. Each of them can control up to 4 audio channels.
For example, in my project I use AD1939 audio codec with 4 audio inputs and 8 audio outputs.
Thanks for your reply
in our project ,BF533 is a slave cpu ,it will receive audio signal from master(4 channels) and send data to codec(4 channels)
in some cases , 2 input IIS LRCLK frequency (sample rate )is diffrent to others
e.g .these 2 input signal will be changed continuesly for 44.1k-->46k
other 6 channels fix as 44.1k
is it possible?
I think that it is possible.
You can use e.g. SPORT0 TX interface to feed output audion data to your codec (4 channels, common TX_CLK and TX_FS signal).
The same interface SPORT0 RX you can use for receivingof two audio signal with the same RX_CLK and RX_FS signal.
SPORT1 RX interface can be used for receiving other two audio signal with the same RX_CLK and RX_FS signals that are different from other 2 input audio signals on SPORT0 RX.
If it is not clear, can you upload some picture of your configuration?
I am sorry , I do not know how to upload the picture
can you add me to your contact list ?
skype: yp.wang20101 email firstname.lastname@example.org
To upload a picture to this discussion after clicking reply you can click on the "Insert Image" icon indicated below.
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I hope this helps.
EngineerZone Support Community Manager
Thanks for contributing to Blackfin Forum community.
Do let us know if you have further questions related to this query. Basically I agree with Milan's solution that if you want to use 4 i/p and 4 o/p channels of audio, then you can realise that using single codec interfaced to a SPORT module of processor. However, if two channels from them are of different sampling freq than others, then you may have to use two codec's interfaced to separate SPORTs.
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