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XAPP979 (v1.0) February 26, 2007 www.xilinx.com 1
© 2007 Xilinx, Inc. All rights reserved. All Xilinx trademarks, registered trademarks, patents, and further disclaimers are as listed at http://www.xilinx.com/legal.htm. PowerPC is
a trademark of IBM Inc. All other trademarks and registered trademarks are the property of their respective owners. All specifications are subject to change without notice.
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Summary This application note describes how to build a reference system for the On-Chip Peripheral Bus
Inter IC (OPB IIC) core using the IBM PowerPC™ 405 Processor (PPC405) based embedded
system in the ML403 Embedded Development Platform. The reference system is Base System
Builder (BSB) based.
An IIC primer is given and an OPB IIC register reference is provided. The Xilinx Microprocessor
Debugger (XMD) commands are used for verifying that the OPB IIC core operates correctly.
Several software projects illustrate how to configure the OPB IIC core, set up interrupts, and do
read and write operations. Some of the software projects interface the OPB IIC to the
MicroChip 24LC04B serial EEPROM with an IIC interface, while others interface to the
TotalPhase Aardvark Adapter, which provides IIC master and slave functionality. The procedure
for using ChipScope™ to analyze OPB IIC functionality is provided. The steps used to build a
Linux kernel using MontaVista are listed. Simulation output files for analyzing basic IIC
transactions are provided.
Included
Systems
This application note includes one reference system:
www.xilinx.com/bvdocs/appnotes/xapp979.zip
The project name used in xapp979.zip is ml403_ppc_opb_iic.
Required
Hardware/Tools
Users must have the following tools, cables, peripherals, and licenses available and installed:
• Xilinx EDK 8.2.02i
• Xilinx ISE 8.2.03
• Xilinx Download Cable (Platform Cable USB or Parallel Cable IV)
• Monta Vista Linux v2.4 Development Kit
• Modeltech ModelSim v6.1d
• ChipScope v8.2
Application Note: Embedded Processing
XAPP979 (v1.0) February 26, 2007
Reference System: OPB IIC Using the
ML403 Evaluation Platform
Author: Paul Glover, Ed Meinelt, Lester Sanders
R