axi-protocol

AXI Protocol Skill

Overview

Expert skill for AMBA AXI protocol implementation and verification, enabling high-performance interconnect design for FPGA systems.

Capabilities

• Implement AXI4, AXI4-Lite, and AXI4-Stream interfaces
• Design AXI masters, slaves, and interconnects
• Handle burst transactions (INCR, WRAP, FIXED)
• Implement proper valid/ready handshaking
• Design AXI address decoding and routing
• Create AXI VIP-based verification
• Optimize AXI performance and throughput
• Generate AXI protocol checkers

Target Processes

• axi-interface-design.js
• ip-core-integration.js
• memory-interface-design.js
• hls-development.js

Usage Guidelines

AXI4 Full Features

• Write address channel (AW), Write data channel (W), Write response (B)
• Read address channel (AR), Read data channel (R)
• Burst types: FIXED, INCR, WRAP
• Burst lengths up to 256 beats
• Out-of-order transaction completion

AXI4-Lite Subset

• Single-beat transactions only
• No burst support
• Simplified for control/status registers
• 32-bit or 64-bit data width

AXI4-Stream

• Continuous data streaming
• TVALID/TREADY handshake
• TLAST for packet boundaries
• TKEEP/TSTRB for byte enables

Handshake Rules

• Source must not wait for READY before asserting VALID
• Once VALID asserted, must remain until READY
• Transfer occurs on clock edge when both VALID and READY high
• Deadlock prevention through proper protocol compliance

Performance Optimization

• Pipeline channels for frequency
• Use write interleaving when supported
• Implement outstanding transaction support
• Size data width for bandwidth requirements

Dependencies

• ARM AMBA AXI specification knowledge
• Protocol checker integration
• VIP awareness for verification