1.2 KiB
1.2 KiB
🧠 PS Subsystem (Control + Processing)
Overview
The PS subsystem is responsible for:
- Configuring PL subsystems
- Receiving data via DMA
- Performing frame-based processing
Responsibilities
Control
- Writes parameters to PL registers:
- Tx generator configuration
- Generates TxPulseStart trigger
DMA Handling
- AXI4-Stream → DMA (S2MM)
- Data stored in PS DDR
Configuration:
- Frame size: 512
- Buffers: 16
Processing Pipeline
DMA → uint64[512]
→ unpack real/imag
→ convert to complex
→ RMS + peak detection
Execution Model
- Event-driven (DMA trigger)
- No buffering queue
- Frames may be dropped
Performance Notes
- Bottleneck: unpacking + conversion
- Cannot sustain full-rate input
Interaction with PL
Tx Control
- Low-rate trigger (~Hz)
- Starts burst generation
Rx Data
- Continuous high-rate stream
Future Work
- Replace processing with FrFT
- NEON optimization
- Throughput improvements