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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

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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.
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      - 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
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        Execute a vendor-unique command
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        Clear or set write protection
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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: