_NUTDEVICE Struct Reference
[Device I/O, Device I/O]

#include <sys/device.h>

Collaboration diagram for _NUTDEVICE:

Detailed Description

Device structure.

Data Fields

NUTDEVICE * dev_next

Link to the next device structure.

u_char dev_name [9]

Unique device name.

u_char dev_type

Type of interface.

uptr_t dev_base

Hardware base address.

u_char dev_irq

Interrupt registration number.

void * dev_icb

Interface control block.

void * dev_dcb

Driver control block.

int(* dev_init )(NUTDEVICE *)

Driver initialization routine.

int(* dev_ioctl )(NUTDEVICE *, int, void *)

Driver control function.

int(* dev_read )(NUTFILE *, void *, int)

Read from device.

int(* dev_write )(NUTFILE *, CONST void *, int)

Write to device.

NUTFILE *(* dev_open )(NUTDEVICE *, CONST char *, int, int)

Write to device. Open a device or file.

int(* dev_close )(NUTFILE *)

Close a device or file.

long(* dev_size )(NUTFILE *)

Request file size.

Field Documentation

uptr_t _NUTDEVICE::dev_base

Hardware base address.
Will be set by calling NutRegisterDevice(). On some device drivers this address may be fixed.

void* _NUTDEVICE::dev_dcb

Driver control block.
Points to a device specific information block.

void* _NUTDEVICE::dev_icb

Interface control block.
With stream devices, this points to the IFSTREAM structure and with network devices this is a pointer to the IFNET structure.

int(* _NUTDEVICE::dev_init)(NUTDEVICE *)

Driver initialization routine.
This routine is called during device registration.

int(* _NUTDEVICE::dev_ioctl)(NUTDEVICE *, int, void *)

Driver control function.
Used to modify or query device specific settings.

u_char _NUTDEVICE::dev_irq

Interrupt registration number.
Will be set by calling NutRegisterDevice(). On some device drivers the interrupt may be fixed.

u_char _NUTDEVICE::dev_type

Type of interface.
May be any of the following:

IFTYP_RAM
IFTYP_ROM
IFTYP_STREAM
IFTYP_NET
IFTYP_TCPSOCK
IFTYP_CHAR

Programmable Gateways

_NUTDEVICE Struct Reference [Device I/O, Device I/O]

Detailed Description

Data Fields

Field Documentation

_NUTDEVICE Struct Reference
[Device I/O, Device I/O]