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
About IEEE1394 address space.
Started by ●October 18, 2010
Reply by ●October 19, 20102010-10-19
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
Reply by ●October 19, 20102010-10-19
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
