Thread: Simple questions
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From: Julien P. <jul...@ho...> - 2000-05-03 17:17:03
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I am following this mailing list since a few months and I am now beginning writing some code to link 2 computers by ieee1394 under Linux. Since I am beginning, I plan to use only asynchronous transactions but I will have to use isochronous transactions in the future (for bandwith purposes). I know that Iso write function is still not written so I know that I'll have to do it one of theese days. But first, I have to answer this question: - What does FCP and HPSB stands for? Thanks. Julien ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com |
From: Manfred W. <e95...@st...> - 2000-05-03 22:08:53
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Julien Pouliot wrote: > But first, I have to answer this question: > - What does FCP and HPSB stands for? IEC 61883-1 says in chapter 9 (section 9.1) on page 37: "Function control protocol (FCP) is designed in order to control devices connected through a IEEE 1394 bus. Various command sets and various command transactions are available on FCP. FCP is designed to be based on IEEE 1393, an FCP uses asynchronous packets of iIEEE 1394 for sending commands and responses..." It is used for example by AV/C (audio video control) to control cameras, dvb tuners etc. You can have a look to the AV/C standard (available on http://www.1394ta.org/Download/Technology/Specifications/AVC_30.pdf) for a detailed explanation. Commands are sent (as write transactions) by the controller to the fcp command register at the target. Responses are sent by the target to the fcp response register of the controller. I do not know, what hpsb is (but I do not either need it). Manfred Weihs |
From: hunter <hu...@ti...> - 2000-05-05 06:31:37
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At 11:46 PM 5/3/00 +0200, Manfred Weihs wrote: >I do not know, what hpsb is (but I do not either need it). > >Manfred Weihs Of course you need it. Look at the 1394 spec -- 1394 *is* the High Performance Serial Bus -- HPSB. Hunter |