2009-02-28 05:32:31     can host access memery of blackfin or dsp access memory of host?

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2009-02-28 05:32:31     can host access memery of blackfin or dsp access memory of host?

playdvd i (CHINA)

Message: 70151   

 

In my application , there are host CPU and blackfin dsp, I hope they can exchange data rapidly.

I known the TI dsp 's memory can access by  host CPU with HPI,

tigerSharc dsp and host can also exchange data with streamline,

But how blackfin dsp and host exchange data from memory to memory ?  because SPI is too slow.

 

我有这样的需要,系统由host cpu(比如另一个SOC) 和blackfin dsp 组成, 当然还包括内存, 最好是二者各自有自己的内存,

这两个cpu需要快速交换数据,当然SPI/UART应该能完成,但是太慢了,blackfin dsp 和host cpu 之间有办法直接内存交换?就类似TI dsp有HPI接口及tigerSharc dsp 有流水线方式一样。

blackfin dsp 没有SOC bus 是不是不支持流水线访问?或者:一个系统中,多tigerSharc是肯定可以的,有办法实现多blackfin dsp (除了BF561)吗?

 

请不吝指导,谢谢。

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2009-02-28 07:56:25     Re: can host access memery of blackfin or dsp access memory of host?

Phil Wilshire (UNITED STATES)

Message: 70156   

 

You can use PPI

 

If you have a 561 you will have one for each direction.

 

  Phil Wilshire

 

 

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2009-02-28 09:54:55     Re: can host access memery of blackfin or dsp access memory of host?

playdvd i (CHINA)

Message: 70158   

 

The data is not only video/audio.

Because data format and access time is not certain, I hope to solve it by memory map , buffer operate will be the last choice .

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2009-02-28 10:13:37     Re: can host access memery of blackfin or dsp access memory of host?

Robin Getz (UNITED STATES)

Message: 70160   

 

Play:

 

Are you using Linux - or just have some Blackfin hardware questions.

 

Hardware questions are best answered by ADI -

 

forms.analog.com/Form_Pages/support/dsp/dspSupport.asp

 

-Robin

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2009-02-28 14:36:40     Re: can host access memery of blackfin or dsp access memory of host?

Mike Frysinger (UNITED STATES)

Message: 70166   

 

no one said PPI is video/audio only.  PPI is used all the time to simply move data.

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2009-02-28 23:09:04     Re: can host access memery of blackfin or dsp access memory of host?

playdvd i (CHINA)

Message: 70170   

 

Actually I try to seperate konqueror into host cpu and dsp, because the display be controled by the host , but the host cpu is weak, so I got a dsp to do the other things.

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