Vector VEC256 Specifications download pdf (Page 299)

Embedded System Tools Guide (EDK 6.2i) www.xilinx.com 299

UG111 (v1.4) January 30, 2004 1-800-255-7778

Example

MDD file example

An example MDD file for the uartlite driver is given below:

OPTION psf_version = 2.1;

OPTION is a keyword identified by the li/jointfilesconvert/328590/bgen tool. The option name following the

OPTION keyword is a directive to the li/jointfilesconvert/328590/bgen tool to do a specific action. Here psf_version

of the MDD file is defined to be 2.1. This is the only option that can occur before a BEGIN

DRIVER construct now.

BEGIN DRIVER uartlite

The BEGIN DRIVER construct defines the start of a driver named “uartlite”.

PARAM NAME = level, DESC = "Driver Level", TYPE = int, DEFAULT = 0,

RANGE = (0, 1);

PARAM defines a driver parameter that can be configured. Each PARAM has the following

properties associated with it whose meaning is self-explanatory - NAME, DESC, TYPE,

DEFAULT, RANGE.

BEGIN BLOCK, DEP = (level = 0)

BEGIN BLOCK, dep allows conditional inclusion of a set of parameters subject to a

condition fulfillmen. The condition is given by the DEP construct. Here the set of

parameters defined inside the BLOCK would be processed by li/jointfilesconvert/328590/bgen tool only when

“level” parameter has a value 0.

OPTION DEPENDS = (common_v1_00_a);

OPTION COPYFILES = (xuartlite_l.c xuartlite_l.h Makefile);

OPTION DRC = uartlite_drc;

The DEPENDS option specifies that the driver depends on the sources of a directory

named “common_v1_00_a”. The area for searching the dependent directory is decided by

the li/jointfilesconvert/328590/bgen tool. COPYFILES option indicates the files to be copied for a “level” 0 uartlite

driver. DRC option specifies the name of the Tcl procedure that the tool invokes while

processing this driver. Here “uartlite_drc” is the Tcl procedure in the uartlite_v2_1_0.tcl file

that would be invoked by li/jointfilesconvert/328590/bgen while processing the uartlite driver.

BEGIN INTERFACE stdin

BEGIN INTERFACE defines an interface the driver supports. Here “stdin” is the name of

the interface.

PROPERTY header = xuartlite_l.h;

FUNCTION name = inbyte, value = XUartLite_RecvByte;

END INTERFACE

An Interface contains a list of standard functions. A driver defining an interface should

have values for the list of standard functions. It must also specify a header file where all the

function prototypes are defined.

PROPERTY defines the properties associated with the construct defined in the BEGIN

construct. Here “header” is a property with value “xuartlite_l.h”, defined by the “stdin”

interface. FUNCTION defines a function supported by the interface. Here “inbyte”

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Vector VEC256 Specifications Page 299

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