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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
DCMD_MMCSD_*
DCMD_MMCSD_ERASED_VAL
Get an erased value

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.
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    - BIOC*
    - CAN_DEVCTL_*
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    - DCMD_MMCSD_*
      - DCMD_MMCSD_CARD_REGISTER
        Read a card register
      - DCMD_MMCSD_ERASE
        Erase an area on the device
      - DCMD_MMCSD_ERASED_VAL
        Get an erased value
      - DCMD_MMCSD_GET_CID
        Get card ID information
      - DCMD_MMCSD_GET_CID_RAW
        Get raw card ID information
      - DCMD_MMCSD_GET_CSD
        Get card-specific data
      - DCMD_MMCSD_RPMB_RW_FRAME
        Read or write an RPMB frame
      - DCMD_MMCSD_RPMB_SIZE
        Get the size of the RPMB partition
      - DCMD_MMCSD_VUC_CMD
        Execute a vendor-unique command
      - DCMD_MMCSD_WRITE_PROTECT
        Clear or set write protection
    - DCMD_PROC_*
    - DCMD_PROF_*
    - DCMD_PTPD_*
    - DCMD_SDIO_*
    - DCMD_SDMMC_*
    - DCMD_SPI_*
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    - FIO*
    - TC*
    - TIOC*
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    The QNX Cryptography Library (qcrypto) is a flexible cryptography framework that allows you to choose which cryptography provider responds to requests on a per-process basis.
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    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
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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.

DCMD_MMCSD_ERASED_VAL

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Get an erased value

Synopsis:

#include <hw/dcmd_sim_mmcsd.h>

#define DCMD_MMCSD_ERASED_VAL   __DIOF(_DCMD_CAM, _SIM_MMCSD + 53, uint8_t)

Arguments to devctl():


Argument	Value
`filedes`	A file descriptor that you obtained by opening the device
`dcmd`	DCMD_MMCSD_ERASED_VAL
`dev_data_ptr`	A pointer to a uint8_t
`n_bytes`	`sizeof(uint8_t)`
`dev_info_ptr`	NULL

Description:

This command gets an erased value from the RPMB.

Input:

None.

Output:

The erased value.

DCMD_MMCSD_ERASED_VAL

Synopsis:

Arguments to devctl():

Description:

Input:

Output:

See also: