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XXBX: Extended External Benchmarking Tool

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Motivation and Features: XXBX benchmarks algorithms on microcontrollers without operating systems
Measures throughput, ROM, RAM usage and power consumption
Supports 32-bit microcontrollers, especially ARM-based ones
Originally ported from SUPERCOP to MSP430 platform
Hardware Components: Uses XBH protocol for communication between XBS and XBD
Supports multiple CPU architectures including MSP430 and ARM Cortex-M4F
Includes power measurement hardware for real-time monitoring
Features current sensing for low and high side measurements
Software Implementation: Runs on FreeRTOS with lightweight IP instead of bare metal
Uses timer interrupts for timing measurements
Supports resuming partial runs and SQLite database storage
Includes AEAD support and power benchmarking capabilities
Future Development: Plans to add support for AVR and MIPS processors
Will integrate power measurement hardware
Will implement cycle counters and memory wait states
Will check constant time variability and idle power measurements