Overviews

Commands

See Also

To use the exc_bus_translate utility, you must first create a Master Port High-Level Command File (.dat) that describes the read, write, wrapping, and incremental burst operations, as well as busy and idle transactions and periods of idleness that are initiated by the embedded processor core and are directed to the PLD. The Master Port High-Level Command File must contain the the bus transactions in the following high-level command syntax:

COMMAND ::=  WRITE ( START, SIZE, LENGTH, DATAVALUE, [ , DATAVALUE …] ); 	|
	     READ ( START, SIZE, LENGTH); 					|
	     READMATCH ( START, SIZE, LENGTH, DATAVALUE, [ , DATAVALUE …] ); 	|
	     INACTIVE ( CYCLES );
		 
READ ::= "read" | "read_i" | "read_w" 
READMATCH ::= ::= "readmatch" | "readmatch_i"  | "readmatch_w"
WRITE::= "write" | "write_i" | "write_w"
INACTIVE ::= "inactive"
START::= <integer>
SIZE::= "8" | "16" | "32"
LENGTH::= <integer>
DATAVALUE::= <integer>
IDLE::= "idle"
CYCLES::=<integer>
<integer>::= C style integer specified as unsigned decimal or hex.

The _i and _w suffixes denote a INCREMENTING BURST and WRAPPING BURST, respectively.

You may also include comments in the syntax. The following example shows an excerpt of a sample file that includes comments, preceded by two slashes (//):

read (1025, 8, 1);		// read byte at address 1025
write (1024, 16, 1, 73);	// write the 16-bit value 73 into address 1024
read (1025, 8, 3);		// read bytes at addresses 1025, 1026, 1027 
write (1024, 32, 3, 1 ,2, 3);	// write the values 1, 2, 3 into the words at
				// addresses 1024, 1028, 1032

When creating the Master Port High-Level Command File, use the following guidelines:

• The INACTIVE command inserts a number of cycles of inactivity, not IDLE bus cycles.
• The READMATCH command allows the expected data to be specified.
• Non-32 bit data values should be aligned in the correct byte lanes (little endian).

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