# 🧠 PS Subsystem (Control + Processing)

[🏠 Project Home](../README.md)

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## Overview

The PS subsystem is responsible for:

- Configuring PL subsystems
- Receiving data via DMA
- Performing frame-based processing

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## Responsibilities

### Control

- Writes parameters to PL registers:
  - Tx generator configuration
- Generates TxPulseStart trigger

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### DMA Handling

- AXI4-Stream → DMA (S2MM)
- Data stored in PS DDR

Configuration:
- Frame size: 512
- Buffers: 16

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### Processing Pipeline

DMA → uint64[512]  
→ unpack real/imag  
→ convert to complex  
→ RMS + peak detection  

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## Execution Model

- Event-driven (DMA trigger)
- No buffering queue
- Frames may be dropped

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## Performance Notes

- Bottleneck: unpacking + conversion
- Cannot sustain full-rate input

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## Interaction with PL

### Tx Control
- Low-rate trigger (~Hz)
- Starts burst generation

### Rx Data
- Continuous high-rate stream

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## Future Work

- Replace processing with FrFT
- NEON optimization
- Throughput improvements

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## 🔗 Related Components

- [🏠 Project Home](../README.md)
- [PL Tx Subsystem](pl_tx_subsystem.md)
- [PL Rx Subsystem](pl_rx_subsystem.md)