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Writing Software Code
A tutorial showing this design-flow can be found in the “Hardware Software Co-Design in
System Generator” chapter in the System Generator User Guide .
Writing Software Code
Shared-memory blocks associated to an EDK Processor can be accessed by name inside C
code. When System Generator creates the memory map, template C-code software drivers
and their corresponding documentation are created. This C-code driver is inflated by the
EDK during the LibGen phase of compilation in the EDK software compilation flow.
The documentation generated for a pcore can be found in the doc directory in a pcore. A
PDF and an HTML version of the documentation are provided, and these can be accessed
from the EDK.
Figure 3-9 shows a screen capture of a Xilinx Platform Studio (XPS) instance. The
peripheral sha256pcore_sm is a pcore generated with System Generator. In this EDK
project, that pcore has been added to the system and renamed sha . Right click on the
peripheral in the XPS assembly view to call up the popup menu shown in Figure 3-9 .
Selecting View API Documentation shows the documentation for the peripheral. The
documentation contains information on which header files to include, the naming
convention of the memory-map identifiers, the software driver function prototypes, and
example code snippets.
Figure 3-9: Xilinx Platform Studio - Assembly View
The generated software drivers contain six basic functions for accessing shared memories.
The <inst> label in the function list shown below refers to the instance name of the
pcore. When a user-defined pcore is added into an EDK project, a unique instance name
Video Starter Kit
UG217 (v1.5) October 26, 2006
www.xilinx.com
41
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