Re: STA013 problem


eeh wrote:

> Thanks for your reply.
>
> For the sta013, the I2C bus is ued to configure the chip

Yes.

> and the SPI
> interface (Pins 5,6,7) is used to stream the mp3 data into it.

Unless I don't get it - that's not what I call an SPI interface.

That'll also explain why the sta013 isn't outputting any audio data.

> I used
> normal IO port to push data so that I need to swap bits before
> serialize into the STA013.

I don't understand what you're saying there. What exactly is the source of
the mp3 compressed data ?

What kind of 'normal I/O' ? I'd call 8 bit parallel about as normal as it
gets but even Intel and Motorola couldn't agree on read and write
strobes.. All the serial formats ( which it is ) are a bit quirky.


> The I2C interface is indeed OK as it returns correct chip ID, and so I
> think it is OK. I think I should say it more firmly.:)

Ok.

Look at the transfer protocol for that SDI ( not SPI ) input ! I think
that's your problem.

Graham


.

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