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Running and Debugging Projects

Configuring the FPGA

When targeting Nios II hardware, you must configure the FPGA on the target board with your

project's associated SOPC Builder system. The factory-programmed SOPC Builder system (i.e.

the FPGA hardware design) on targets like the Nios development boards is different than your

project's SOPC Builder system. Therefore, your executable code does not run unless you

configure the FPGA with the expected SOPC Builder system.

You only need to configure the FPGA when you reset the board, or if the SOPC Builder system

file changes. Normally, you configure the FPGA once after you apply power to the board, and

the configuration persists through the duration of the Nios II IDE session.

Note: If you are targeting a board other than the Nios development board, you need to

configure the Quartus II programmer differently, as specified by the board designer. In

the Quartus II software, you can save the configuration settings to a Chain Description

File (.cdf), eliminating the need to configure the Quartus II programmer every time you

configure the device.

To configure the FPGA, use the Quartus II Programmer. The Quartus II Programmer is Altera's

tool for configuring FPGAs via a JTAG download cable, such as the USB Blaster.

To launch the Quartus II Programmer:

On Windows:

1. Switch to the Nios II C/C++ perspective, if necessary.

2. Click your project in the Nios II C/C++ Projects view.

3. On the Tools menu, click Quartus II Programmer....

On Linux:

1. Launch the Quartus II software.

2. On the Tools menu, click Programmer.

To configure the FPGA from the Quartus II Programmer:

1. Click Add File... in the Quartus II Programmer. The Select Programming File

dialog box appears.

2. Browse to the location of the hardware design that corresponds to your Nios

development board. For example, the directory used in the software development

tutorial is <Nios II EDS install path>/examples/verilog/<Nios development

board>/full_featured. On Windows, you are likely already in the proper

directory.

3. Select the SRAM object file (.sof) for your project and click Open.

4. Turn on the Program/Configure option for the target device.

5. Click Start. When the progress meter reaches 100%, configuration is complete.

Note: If Start is not enabled, click Hardware Setup to configure your Altera

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AOpen MK86-L Guide de l'utilisateur Page 63