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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 QNX Neutrino 7.1.
Utilities & Libraries
Devctl and Ioctl Commands
DCMD_SDIO_*

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics 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 QNX Neutrino 7.1.
- Quickstart Guide
- OS Components & Operations
- Audio & Graphics API
- Multimedia
- Networking Middleware
- Programming
- Sensor Framework
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
- Utilities & Libraries
  - Addon Interfaces Library Reference
  - C Library Reference
  - Devctl and Ioctl Commands
    - BIOC* (io-sock)
    - CAN_DEVCTL_*
    - DCMD_ALL_*
    - DCMD_BLK_*
    - DCMD_BT_*
    - DCMD_CHR_*
    - DCMD_DUMPER_*
    - DCMD_ETFS_*
    - DCMD_F3S_*
    - DCMD_FSEVMGR_*
    - DCMD_FSYS_*
    - DCMD_IP_*
    - DCMD_MEMMGR_*
    - DCMD_MISC_*
    - DCMD_MMCSD_*
    - DCMD_PROC_*
    - DCMD_PROF_*
    - DCMD_PTPD_*
    - DCMD_SDIO_*
      - DCMD_SDIO_ATTACH_DEVICE
        Attach a device
      - DCMD_SDIO_CFG_IOMEM
        Configure I/O memory
      - DCMD_SDIO_CLR_IOREG
        Clear some bits in an I/O register
      - DCMD_SDIO_DETACH_DEVICE
        Detach a device
      - DCMD_SDIO_DEV_START
        Start a device handler
      - DCMD_SDIO_DEV_STOP
        Stop a device handler
      - DCMD_SDIO_GET_HCCAP
        Get the host controller capabilities
      - DCMD_SDIO_INTR_DISABLE
        Disable a function interrupt
      - DCMD_SDIO_INTR_ENABLE
        Enable a function interrupt
      - DCMD_SDIO_READ_IOREG
        Read an I/O register
      - DCMD_SDIO_SET_IOREG
        Set some bits in an I/O register
      - DCMD_SDIO_SHMEM_FINI
        Unmap the device's shared memory object
      - DCMD_SDIO_SHMEM_INIT
        Initialize the device's shared memory object
      - DCMD_SDIO_VENDOR
        Execute a vendor-specific command
      - DCMD_SDIO_WRITE_IOREG
        Write to an I/O register
    - DCMD_SDMMC_*
    - DCMD_SPI_*
    - FIO*
    - TC*
    - TIOC*
  - JSON Library Reference
  - PAM Reference
  - 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.
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

DCMD_SDIO_*

This chapter describes the devctl() commands that apply to Secure Digital Input/Output cards.

Page updated: March 12, 2026