On 10/19/2010 10:04 AM, Tim Wescott wrote:
> On 10/18/2010 05:00 AM, huxuelei wrote:
>> Hi, I have been troubled by the IEEE1394 address space for a long time.
>> How to use the lowwer 48bit address space?
>>
>> I use the ubCore's command line tool to read from a 1394 adapter, use the
>> address like 0xFFFF00000000, but the tool told me the address can not be
>> read.But I can read from 0xFFFFF0000404 which defined in CSR.
>>
>> I am so confused about the address problem.
>>
>> Please give me some tips.
>
> My 1394 knowledge is pretty rusty, but if I remember correctly that
> address would have to be defined in the thing you're trying to read; if
> it isn't, then you're out of luck.
>
Oh -- and get yourself a copy of "FireWire System Architecture" by Don 
Anderson of MindShare, Inc (published by Addison Wesley).  When I did a 
FireWire product I -- and the rest of the team working on this -- was 
able to do most of our work by propping the book up next to our monitors 
and writing code from it.  It's _very_ thorough, and I at least found it 
very accessible.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

On 10/18/2010 05:00 AM, huxuelei wrote:
> Hi, I have been troubled by the IEEE1394 address space for a long time.
> How to use the lowwer 48bit address space?
>
> I use the ubCore's command line tool to read from a 1394 adapter, use the
> address like 0xFFFF00000000, but the tool told me the address can not be
> read.But I can read from 0xFFFFF0000404 which defined in CSR.
>
> I am so confused about the address problem.
>
> Please give me some tips.

My 1394 knowledge is pretty rusty, but if I remember correctly that 
address would have to be defined in the thing you're trying to read; if 
it isn't, then you're out of luck.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html

Hi, I have been troubled by the IEEE1394 address space for a long time.
How to use the lowwer 48bit address space?

I use the ubCore's command line tool to read from a 1394 adapter, use the
address like 0xFFFF00000000, but the tool told me the address can not be
read.But I can read from 0xFFFFF0000404 which defined in CSR.

I am so confused about the address problem.

Please give me some tips.

Thanks.

	   
					
---------------------------------------		
Posted through http://www.EmbeddedRelated.com