3 test and demonstration source files, 4 multitasking in your application – Schneider Electric Modbus Plus Network Bridge Multiplexer none User Manual

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Configuring the Programmable Models

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4.3.3

Test and Demonstration Source Files

The following files provide source code examples that you can use in

your development. They can also be modified and used as test programs

for exercising and testing your BM85.

File Name

Purpose

TEST0.C

Displays a code on the BM85 LED indicators

TEST1.C

Shows Modbus Plus master and slave operation

TEST2.C

Demonstrates multitasking using the BM85 indicators

TEST3.C

Demonstrates floating point emulator

TEST4.C

Simulates process control with multitasking, C++ conventions

TEST5.C

Same as TEST4.C, but uses C conventions

TEST6.C

RS232 port loopback test

TEST7.C

RS232/RS485 port loopback test, long term

TEST8.C

Sample large program (240K) for download testing

Using the Test and Demonstration Source Files

To use any file, first copy it to the filename BM85.C, then modify that

file for your BM85 application and compile it. Download the executable

BM85.EXE to the BM85 using the BM85LOAD utility. For example, the

download can be run within the Borland 3.1 environment using the

following sequence:

Key Sequence

Purpose

Alt–space

Transfer menu

BM85 download

4.3.4

Multitasking in Your Application

The BM85 library includes functions that you can use to construct a

routine for assigning and controlling multiple tasks or threads within

your application. Multitasking is handled on a cooperative basis: an

active task routine must make periodic calls to an arbitration routine,

allowing that routine to either continue the calling task or handle

another pending task.

Your demonstration programs TEST4.C and TEST5.C provide source

examples of the use of the library's multitasking functions. TEST4.C is

coded in C++. TEST5.C is coded in C for programmers who are more

familiar with that language.