RAM 6.0 BUX II Series Uživatelská příručka stáhnout pdf (Strana 72)

VxWorks

BSP Developer’s Guide, 6.0

Copying Additional Code From the Reference BSP

If you followed the guidelines provided in earlier sections, your initial

development for processor and memory initialization consisted of a number of

files containing empty stub routines. At this point, you can copy relevant material

from the reference BSP to your BSP directory.

It is also common practice for developers to copy usrConfig.c to the BSP directory

and modify Makefile with the

USRCONFIG= line such that a local version of the

usrConfig.c file is used. In this practice, the contents of the usrInit( ) and

usrRoot( ) routines are commented out using #if 0 /* BSP development */ and

#endif /* BSP development */. You may also wish to add a call to a debugging

output routine (such as kprintf( )) at the end of usrInit( ) (before the call to

kernelInit( )) and at the beginning of usrRoot( ).

When BSP development reaches the stage where usrInit( ) is being executed,

remove the commenting from short sections to verify that the system continues to

work with these sections in place. This is done by moving the

#if 0 /* BSP development */ line to below the sections that should now be

included. At the end of usrInit( ), a call to kernelInit( ) is made. Once you reach

the point at which all the usrInit( ) code is included and the call to kernelInit( ) is

occurring, the system should execute the diagnostic message that you had placed

at the beginning of usrRoot( ). If it does not execute the message, there is a problem

with the BSP. Once usrRoot( ) is successfully called, start removing the

commenting from sections of usrRoot( ).

Initializing RAM-Based Image Types

This section describes the initialization routine for the RAM-based VxWorks

image.

sysALib.s: sysInit( )

The VxWorks entry point is sysInit( ). sysInit( ) performs the minimal setup

necessary to transfer control to usrInit( ) (in usrConfig.c). Most hardware and

device initialization is performed later in the initialization sequence by

sysHwInit( ) in sysLib.c.

NOTE: If the board fails to boot when a system module is initialized, it is almost

always caused by a failure in the BSP.

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RAM 6.0 BUX II Series Uživatelská příručka Strana 72