Xilinx LogiCORE Endpoint v2.4, Руководство пользователя

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Ethernet AVB Endpoint User Guide www.xilinx.com 119
UG492 September 21, 2010
Using the Xilinx LogiCORE IP Tri-Mode Ethernet MACs
Figure 12-4 illustrates the connection of the Ethernet AVB Endpoint core to the EMAC
when using the Ethernet Statistics core. This shares much in common with Figure 12-2 ;
however, note the following additional points:
•
All of the “MAC Management Interface” output signals of the Ethernet AVB Endpoint
core connect directly to the signals of both the EMAC and Ethernet Statistics cores.
•
The Ethernet AVB Endpoint core provides two separate “MAC Management
Interface” inputs for management reads. This allows for logic-less connections
between all three cores as illustrated. To achieve this
♦
connect
host_rd_data_mac[31:0]
of the Ethernet AVB Endpoint core to the
HOSTRDDATA[31:0]
port of the EMAC.
connect
host_rd_data_stats[31:0]
of the Ethernet AVB Endpoint core to the
host_rd_data[31:0]
port of the Ethernet Statistics core.
Virtex-6 FPGA Embedded Tri-Mode Ethernet MAC
The Ethernet AVB Endpoint core will also connect directly to the Virtex-6 FPGA
Embedded Tri-Mode Ethernet MAC (EMAC). Use all of the preceding steps described for
the Virtex-5 FPGA EMAC, the only difference being that Virtex-6 FPGA EMAC does not
come in pairs; each EMAC is an individual element.
Connection of the PLB to the EDK for LogiCORE IP Ethernet MACs
Figure 12-5 illustrates the connection of the core to an embedded processor subsystem
(MicroBlaze™ processor is illustrated). As shown:
•
The PLB can be shared across all peripherals as illustrated.
•
The “Interrupt Signals” should be connected to the inputs of an interrupt controller
module, for example, the xps_intc core provided with the EDK.
•
The embedded processor should be configured to use the software drivers provided
with the core (see
Chapter 13, “Software Drivers” ) (not illustrated).