PTP Real-Time Linux Images for BeaglePlay & BBB

A Real-time PREEMPT_RT Linux images for BeaglePlay & BeagleBone Black with IEEE 1588 PTP clock sync and oscilloscope-verified timings

_Parag_

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Description

This project showcases real-time Linux images for BeaglePlay and BeagleBone Black SBCs, designed for out-of-the-box use as PTP Grandmaster and Slave devices. It features a custom kernel and a timerfd-based verification script with the following properties:

 Integrated with the PREEMPT_RT patch for real-time performance.

 Device Trees Configured for interfacing with pps-gpio drivers.

 Automatically initializes PTP on startup for both Slave and Grandmaster devices.

 Uses an initramfs-based kernel with an EROFS root filesystem for immutability.

 Includes instructions to mount each filesystem image—FAT32 (boot), Ext4 (kernel & device tree), and EROFS (rootfs)—along with the kernel configuration files.

Features a statically compiled pps-pulser.c program for oscilloscope verification of post-sync user-space latency.

Files

ppsecho_vs_gmgpio.png Portable Network Graphics (PNG) - 140.28 kB - 08/19/2026 at 12:24		Preview

image1.jpg JPEG Image - 270.31 kB - 08/19/2026 at 12:24		Preview

ppsecho_vs_slave_gpio.png Portable Network Graphics (PNG) - 219.58 kB - 08/19/2026 at 12:24		Preview

system_arch.png Portable Network Graphics (PNG) - 180.09 kB - 08/19/2026 at 12:24		Preview

image4.png Portable Network Graphics (PNG) - 217.46 kB - 08/19/2026 at 12:24		Preview

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Components

1 × BeaglePlay (AM625x) Used as the grand master node
1 × Openhentek 6022BL For final verification
1 × BeagleBone Black (AM335x) Acting as Slave device
1 × Sparkfun u-block NEO M9N For precise timing signals (pps) input to the grand master

Build Instructions

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1

Downloading and installing the kernel images

Follow the github link provided in the project links section , github page has extensive implementation guide for customising the final images , along with the guide to simply download and install those images for direct use

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Time centered project completed at IEEE Hacks (2017 SDSU Hackathon)

PTP Real-Time Linux Images for BeaglePlay & BBB

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Description

Files

ppsecho_vs_gmgpio.png

image1.jpg

ppsecho_vs_slave_gpio.png

system_arch.png

image4.png

Components

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