DCMD_SPI_GET_DEVINFO

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Get the SPI device information

Synopsis:

#include <hw/io-spi.h>

#define DCMD_SPI_GET_DEVINFO    (__DIOT (_DCMD_SPI, 0x13, spi_devinfo_t))

Arguments to devctl():

Argument Value
filedes A file descriptor that you obtained by opening the device.
dcmd DCMD_SPI_GET_DEVINFO
dev_data_ptr A pointer to a spi_devinfo_t structure (see below)
n_bytes sizeof(spi_devinfo_t)
dev_info_ptr NULL

Description:

The DCMD_SPI_GET_DEVINFO command gets the information for a specific device on the SPI bus.

Input:

None.

Output:

A filled spi_devinfo_t structure: 
typedef struct {
    int         devno;                       /* Device NO. Physical NO. */
    char        name[SPI_DEV_NAME_LEN];      /* Device name */
    uint32_t    current_clkrate;             /* Device current bus speed */
    spi_cfg_t   cfg;                         /* Device configuration */
} spi_devinfo_t;
The members of spi_cfg_t structure: 
typedef struct {
    uint32_t    mode;        /* SPI mode */
    uint32_t    clock_rate;  /* bus speed */
} spi_cfg_t;
For the supported device modes, refer to io-spi.h.

Related documents:

For more information, refer to the following documents:
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