Altera DE1-SoC - Chapter 7 Examples for Using both HPS Soc and FGPA; HPS Control LED and HEX

DE1-SoC User Manual
99
www.terasic.com
March 14, 2014
Chapter 7
Examples for using
both HPS SoC and
FGPA
Although HPS and FPGA can operate independently, they are tightly coupled via a high-bandwidth
system interconnect built from high-performance ARM AMBA® AXITM bus bridges. Both FPGA
fabric and HPS can access to each other via these interconnect bridges. This chapter provides
demonstrations on how to achieve superior performance and lower latency through these
interconnect bridges when comparing to solutions containing a separate FPGA and discrete
processor.
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This demonstration shows how HPS controls the FPGA LED and HEX through Lightweight
HPS-to-FPGA Bridge. The FPGA is configured by HPS through FPGA manager in HPS.
 A brief view on FPGA manager
The FPGA manager in HPS configures the FPGA fabric from HPS. It also monitors the state of
FPGA and drives or samples signals to or from the FPGA fabric. The application software is
provided to configure FPGA through the FPGA manager. The FPGA configuration data is stored in
the file with .rbf extension. The MSEL[4:0] must be set to 01010 or 01110 before executing the
application software on HPS.
 Function Block Diagram
Figure 7-1 shows the block diagram of this demonstration. The HPS uses Lightweight
HPS-to-FPGA AXI Bridge to communicate with FPGA. The hardware in FPGA part is built into
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