Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Guide de l'utilisateur télécharger pdf (Page 150)

150 Enhanced OS-9 for X86 PCAT

Installing and Configuring Enhanced OS-9

pci_write_configuration_word() - write PCI configuration

word

Syntax

#include <pcicnfg.h>

error_code pci_write_configuration_word(u_int32 bus,

u_int32 dev, u_int32 func, u_int32 index, u_int16 val);

State

System

Description

pci_write_configuration_word function() writes to the PCI configuration

space the word value ’val’ for the PCI device at ’bus’ bus number, ’dev’

device number, ’func’ function number, ’index’ offset into the

configuration space.

Header File

MWOS/SRC/DEFS/HW/pcicnfg.h

Example

#include <const.h>

#include <pcicnfg.h>

#include <stdio.h>

main()

{

u_int8 bus, dev, func;

u_int16 cmd;

bus = 0; /* device on bus zero */

device = 11; /* device ID = 11 */

func = 0; /* function number = 0 */

cmd = 7; /* set device to allow bus master */

error = pci_write_configuration_word(bus, dev, func,

offsetof(pci_config_reg, command_reg), cmd);

return error;

}

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Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Guide de l'utilisateur Page 150