Real-Time Workshop User's Guide

Creating a Customized Asynchronous Library

You can use the Real-Time Workshop's VxWorks asynchronous blocks as templates that provide a starting point for creating your own asynchronous blocks. Templates are provided for these blocks:

• Asynchronous Buffer block
• Asynchronous Interrupt block
• Rate Transition block
• Task Synchronization block

You can customize each of these blocks by implementing a set of modifications to files associated with each template. These files are:

• The block's underlying S-function C MEX-file
• The block's mask and the associated mask M-file
• The TLC files that control code generation of the block

At a minimum, you must rename the system calls generated by the TLC files to the correct names for the new real-time operating system (RTOS) and supply the correct arguments for each file. There is a collection of files that you must copy (and rename) from matlabroot/rtw/c/tornado/devices into a new directory, for example, matlabroot/rtw/c/my_os/devices. These files are:

• Asynchronous Buffer block -- vxdbuffer.tlc, vxdbuffer.c
• Asynchronous Interrupt block -- vxinterrupt.tlc, vxinterrupt.c, vxintbuild.m
• O/S include file -- vxlib.tlc
• Task Synchronization block -- vxtask.tlc, vxtask.c

Rate Transition Block

Real-Time Workshop Ada Coder