Changes between Version 2 and Version 3 of Tools/Mwmr

Timestamp:

Feb 21, 2008, 3:29:04 PM (17 years ago)

Author:

alain

Comment:

--

Tools/Mwmr

@@ -12 +12 @@
 is protected by a dedicated ''lock'', for exclusive access.
 
-Any access to a shared MWMR channel respect a five stages protocol :
- *
- *
- *
- *
- * 
+Any access to a shared MWMR channel respect the following five stages protocol :
+ * get the lock protecting the MWMR (READ/WRITE access).  
+ * test the status of the MWMR (READ access).
+ * transfer a burst of data between a local buffer and the MWMR (READ/WRITE access). 
+ * update the status of the MWMR (WRITE access). 
+ * release the lock (WRITE access).
+
 The MWMR middleware can be used with both the MutekH and MutekS operating systems.
 
@@ -23 +24 @@
 
 The MWMR middleware has two main components :
- * The software part is a library of C functions. Those functions are build on top of the POSIX API and implement the 5 steps MWMR protocol. They can be used by a software task to read from or write into
+ * The software part is a library of C functions. Those functions are build on top of the POSIX API and implement the 5 steps MWMR protocol. They can be used by a software task to read from( or write into)
 one or several MWMR channels. You can get the code [https://www-asim.lip6.fr/trac/mutekh here]
  * The  hardware part is a generic [wiki:Component/VciMwmrController MWMR controller]. This hardware component has a DMA capability, and implement the 5 steps MWMR protocol. It and can be used by any hardware coprocessor that has one or several simple FIFO interfaces.