Home
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
Utilities & Libraries
Devctl and Ioctl Commands
PTP_*
PTP_SET_COMPENSATION

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
- Quickstart Guide
- System Architecture
  The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.
- OS Components & Operations
- Graphics
- Programming
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.
- Utilities & Libraries
  - C Library Reference
  - Devctl and Ioctl Commands
  - JSON Library Reference
  - PAM Reference
  - QNX Helpers Developer's Guide
    These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.
  - SPI Framework Technote
  - Utilities Reference
  - WPA Control Interface Reference
    This document provides a reference for the Wi-Fi Protected Access (WPA) control interface, which provides a C API for the WPA/IEEE 802.11i protocols in Wi-Fi client stations. Application developers who want to control WPA operations and get associated status and event data should read this reference.
- Migrating to QNX OS 8.0
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
QNX Toolkit for Visual Studio Code
This User's Guide describes the QNX^® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX^® Operating System (OS) applications and systems.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

PTP_SET_COMPENSATION

Set the current PTP compensation value

Synopsis

#include <io-sock/ptp.h>

#define PTP_SET_COMPENSATION	0x104

Arguments to ioctl():


Argument	Value
fd	File descriptor obtained by opening the device
request	SIOCSDRVSPEC
Additional argument	A pointer to an `ifdrv`

Description

This command sets the current compensation value (from a ptp_comp) for the PTP module.

Input

A filled-in ifdrv structure, defined in net/if.h.

struct ifdrv {
	char		ifd_name[IFNAMSIZ];
	unsigned long	ifd_cmd;
	size_t		ifd_len;
	void		*ifd_data;
};

Fill in each member using the following information:

ifd_name: The interface name; e.g., en0
ifd_cmd: PTP_SET_COMPENSATION
ifd_len: The size of a ptp_comp
ifd_data: A pointer to a ptp_comp structure that contains the compensation value to set

Output

None.

Page updated: March 05, 2025