RAM 6.0 BUX II Series Guia do Utilizador descarregar pdf (Página 24)

VxWorks

Hardware Considerations Guide, 6.0

Designing a CPU board to include an Ethernet chip saves the expense of additional

off-board networking hardware (in a “bus-full” environment) and, potentially, has

a higher performance.

A detailed description of writing a VxWorks END network device driver is

included in the VxWorks Device Driver Developer’s Guide.

USB Controllers

Wind River USB host and peripheral stacks are provided for VxWorks starting

with VxWorks 6.0. For releases prior to VxWorks 6.0, support for the

Wind River USB host or peripheral stacks may be available as an optional product.

For more information, see the Wind River Online Support Web site.

Wind River provides drivers for a limited number of USB devices. For support of

other devices, you must provide your own custom drivers.

SCSI Controllers

SCSI (Small Computer Systems Interface) controllers can be used to control hard

disks, floppy disks, and tape drives. These devices can be used for local booting

and data storage as required by the application. VxWorks provides a

device-independent interface to SCSI controllers through scsiLib, which also

permits the use of the MS-DOS and RT-11 compatible file systems and the

“low-level” raw file system.

The use of a SCSI controller with internal or external DMA capability is not

required, but use of DMA greatly enhances the performance of the driver. The

same cache coherency and addressing issues that apply to Ethernet controllers also

apply to SCSI controllers.

It is important that the SCSI controller selected support the type of SCSI target

required by the application. If advanced SCSI features are important, the SCSI

controller must be able to provide the required features.

A detailed description of writing a VxWorks SCSI device driver is included in the

VxWorks Device Driver Developer’s Guide.

NOTE: Wind River USB, 2.1 does not currently support the on-the-go specification.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 35 36

Sem comentários

RAM 6.0 BUX II Series Guia do Utilizador Página 24