Instructions

170Compiler

Total Length: 4 bytes

Function main()

count 2 2

n 2 0

Total Length: 4 bytes

From this list can be seen that no global variables are being used. There are further the two functions

"Pulse()" and "main()". Each one of these functions consumes a memory space of 4 Bytes on local

variables.

4.2 CompactC

One possibility to program the C-Control Pro Mega 32 or Mega 128 is offered by

the programming language CompactC. The Compiler translates the language

CompactC into a Bytecode which is then processed by the Interpreter of the C-

Control Pro. The language volume of CompactC does essentially correspond with

ANSI-C. It is however reduced to some extent since the firmware had to be imple-

mented in a resource saving way. The following language constructs are missing:

structs / unions

typedef

enum

constants (const instruction)

pointer Arithmetic

Detailed program examples can be found in directory C-Control Pro Demos which was installed

along with the design interface. There example solutions can be found for almost every field of pur-

pose.

The following chapter contains a systematic introduction into syntax and semantics of CompactC.

4.2.1 Program

A program consists of a number of instructions (such as "a=5;") which are distributed among vari-

ous Functions. The starting function, which must be present in every program, is the function "main

()". The following is a minimalistic program able to print a number into the output window:

void main(void)

{

Msg_WriteInt(42); // the answer to anything

}

Projects

A program can be separated into several files which are combined in a project (see Project Manage-

ment). In addition to these project files Libraries can be added to the project which are able to offer

functions used by the program.