GTS AXI Streaming Intel® FPGA IP for PCI Express* Design Example User Guide

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ID 817713
Date 5/09/2024
Public
Document Table of Contents
Document Table of Contents x
1. About the GTS AXI Streaming Intel® FPGA IP for PCI Express* Design Example 2. Quick Start Guide 3. Document Revision History for the GTS AXI Streaming Intel® FPGA IP for PCI Express* Design Example User Guide
1. About the GTS AXI Streaming Intel® FPGA IP for PCI Express* Design Example x
1.1. Programmed Input/Output Design Example 1.2. Programmed Input/Output Design Example Functional Description
1.2. Programmed Input/Output Design Example Functional Description x
1.2.1. GTS AXI Streaming IP—Design Under Test (DUT) 1.2.2. PIO Application 1.2.3. On-Chip Memory (MEM) 1.2.4. GTS System PLL Clocks Intel® FPGA IP 1.2.5. GTS Reset Sequencer Intel® FPGA IP 1.2.6. Reset Release Intel® FPGA IP
1.2.2. PIO Application x
1.2.2.1. Scheduler 1.2.2.2. Read Write Module 1.2.2.3. Avalon® Memory-Mapped Interface 1.2.2.4. Completion Module 1.2.2.5. Width Adapter 1.2.2.6. TX Credit Initialization 1.2.2.7. AXI to Avalon® Streaming Interface Adapter
2. Quick Start Guide x
2.1. Directory Structure 2.2. Generating the Design Example 2.3. Simulating the Design Example 2.4. Design Example Simulation Testbench 2.5. Compiling the Design Example
2.3. Simulating the Design Example x
2.3.1. Steps to Run Simulation using VCS* 2.3.2. Steps to Run Simulation using VCS* MX 2.3.3. Steps to Run Simulation using QuestaSim*
2.3.1. Steps to Run Simulation using VCS* x
2.3.1.1. Running VCS* Simulation in Interactive Mode
2.3.2. Steps to Run Simulation using VCS* MX x
2.3.2.1. Running VCS* MX Simulation in Interactive Mode
2.4. Design Example Simulation Testbench x
2.4.1. Test Driver Module 2.4.2. PIO Design Example Testbench
1. About the GTS AXI Streaming Intel® FPGA IP for PCI Express* Design Example
2. Quick Start Guide
3. Document Revision History for the GTS AXI Streaming Intel® FPGA IP for PCI Express* Design Example User Guide

1.2.2.2. Read Write Module

Prepare the Avalon® memory-mapped Write Sequence or Read Sequence for the Avalon® memory-mapped interface.
  • Write Sequence: Data is aligned by the Barrel Shifter and passed to aligned data FIFO. The write state machine extracts the address, burst count, FBE/LBE, and generates the Avalon® memory-mapped write command. The command is then stored in the Avalon® memory-mapped command FIFO and passed to the Avalon® memory-mapped interface. The maximum write burst count allowed is 8, as decided from the aligned data FIFO depth.
  • Read Sequence: The read state machine decodes the combination of Type1 read and Type2 read based on the PREPROC CMD. Next, it generates the Avalon® memory-mapped command for each Type1 or Type2 read. Concurrently, the CPL command is generated for each Avalon® memory-mapped read command and stored to the CPL CMD FIFO. In the event of waitrequest by the MEM device, Avalon® memory-mapped command FIFO can hold up to 16 data cycles.
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