220.127.116.11. Platform Designer Top System Component
The Platform Designer top system instantiates both the JESD204B IP core data path and the Nios® II subsystem control path.
The top level Platform Designer system, jesd204b_ed_qsys.qsys, instantiates the following modules:
- JESD204B subsystem
- Nios® II subsystem
- Core PLL
- PLL reconfiguration controller
- IRQ bridge
The main data flows through the JESD204B subsystem. The frame data from pattern generator is forwarded to the assembler (TX transport layer). The assembler maps the frame data to non-scrambled octet stream data to the transceiver lane. Each lane has 32-bits of parallel data in Avalon-ST protocol. For each L=8 IP core, the total parallel data bus width is 256 bits. The TX link layer (JESD204B IP core) receives this octet stream data from the assembler, performs scrambling (if enabled) and inserts alignment characters before forwarding the octet stream data to the physical layer. The physical layer (PHY) is part of the JESD204B IP core. The 8b/10 encoded data from the physical layer is transmitted from the high speed serial link transmitter into the FMC loopback card. The FMC loopback card provides a passive pass through of the serial data from the transmitter to the receiver. At the physical layer of the receiver, the 8b/10b decoding is performed and the running disparity and not-in-table errors are monitored. The RX link layer performs lane/frame alignment, octet reconstruction and de-scrambles (if enabled) the data. The RX link layer outputs 8 lanes of 32-bit parallel data/lane in Avalon® -ST protocol to the de-assembler (RX transport layer). The de-assembler maps the octet data stream to the frame data. Finally, the pattern checkers verify the data integrity of the frame data.
The Nios® II processor in the Nios® II subsystem is the Avalon® -MM master of the control path. The Avalon® -MM slaves such as the JESD204B IP cores and peripherals are connected to the Nios® II processor through the Avalon® -MM Pipeline Bridges. The core PLL generates the link clock and frame clock for the system. The mgmt_clk is directly sourced from external oscillator. To view the top level Platform Designer system in Platform Designer, perform the following steps:
- Launch the Intel® Quartus® Prime software.
- On the File menu, click Open.
- Browse and select the jesd204b_ed_qsys.qsys file located in the project directory.
- Click Open to view the Platform Designer system.
You can access the address mapping of the submodules in the top level Platform Designer project by clicking on the Address Map tab in the Platform Designer window.
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