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Discussion Groups | Analog Devices DSPs | Blackfin 21535/BF535 S-port

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

  

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Blackfin 21535/BF535 S-port - Michael Rinder Larsen - Jun 24 8:04:00 2003



Hi
I'm using the Blackfin 21535 and I'm having some difficulties getting the
serial port to work as required.

I understand the serial ports on 21160/21160, but I'm baffled by the
Blackfin Implementation

I need to receive a multi-channel signal with only two 16bit channels.
One frame-sync per channel pair.
As I read the manual the DSP only supports multi-channel mode when more
than 8 channels are received (Window size).

Am I right that the only way for me to receive only two channels will be
to have the frame-syncs more than 8 channels apart and then only enable
the first two. (This is a bit annoying, since it will require hardware
changes and add to the power consumption).

Regards, Michael, Denmark




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Re: Blackfin 21535/BF535 S-port - Mike Rosing - Jun 24 14:07:00 2003

On Tue, 24 Jun 2003, Michael Rinder Larsen wrote:

> I'm using the Blackfin 21535 and I'm having some difficulties getting the
> serial port to work as required.
>
> I understand the serial ports on 21160/21160, but I'm baffled by the
> Blackfin Implementation
>
> I need to receive a multi-channel signal with only two 16bit channels.
> One frame-sync per channel pair.
> As I read the manual the DSP only supports multi-channel mode when more
> than 8 channels are received (Window size).
>
> Am I right that the only way for me to receive only two channels will be
> to have the frame-syncs more than 8 channels apart and then only enable
> the first two. (This is a bit annoying, since it will require hardware
> changes and add to the power consumption).

Sure sounds like it. Can you make 8 4 bit channels and get 32 bits that
way? It'll still be a pain in the butt, but might use less power.

Patience, persistence, truth,
Dr. mike




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