RAM 6.0 BUX II Series Guia do Utilizador descarregar pdf (Página 35)

2 Overview of a BSP

2.3 Components of a BSP

sysSerial.c would identify network interface and serial port drivers, respectively.

Some device drivers are optional and the standard drivers provided in

target/src/drv can be used. In some cases, custom device drivers must be created

for a BSP, and these custom drivers should reside in the BSP directory (although

this is not a requirement). Device driver files are detailed in the following sections

of this guide:

■

3.2.10 Minimum Required Drivers, p.70

■

3.2.11 Serial Drivers, p.71

■

3.3.9 Providing Additional Optional Device Support, p.99

Additional information on device drivers can be found in the VxWorks Device

Driver Developer’s Guide.

The sysDev.c files are normally included in sysLib.c with a #include rather than

compiled separately. This allows hardware drivers to be shared between BSPs

without adding complexity to the makefiles.

configAll.h

This file contains the default OS configuration for all BSPs, and should only be

changed under extreme circumstances. Changing this file makes your BSP

incompatible with all default VxWorks installations. Any make variable defined in

this file can be overridden in config.h.

bootInit.c

The bootInit.c file contains romStart( ), which is the first C routine to execute

during the VxWorks boot process. This routine is architecture-independent and

should not need to be changed.

CAUTION: In some cases, the sysDev.c file contains the actual device driver instead

of an interface between the driver and the OS. This is considered incorrect design.

The preferred method is to have the driver contained in a separate file, devType.c

(for example, acmeSio.c) and the interface module contained in the sysDev.c file

(for example, sysAcmeSio.c). This method allows for better code reuse.

CAUTION: Changing configAll.h can impact other VxWorks users sharing your

VxWorks installation.

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RAM 6.0 BUX II Series Guia do Utilizador Página 35