Mikroelektronika MIKROE-350 データシート

Here’s a simple function which calculates x

n

based on input parameters 

x

and 

n

(

n > 0

):

sub function power(dim x, n as byte) as longint
dim i as byte

result = 1
if n > 0 then

for i = 1 to n

result = result*x

next i

Now we could call it to calculate, say, 312:

tmp = power(3, 12)

Procedure is declared like this:

sub procedure procedure_name(parameter_list)

[ local declarations ]
procedure body

procedure_name

represents a procedure’s name and can be any valid identifier. Within

parentheses, 

parameter_list

is a formal parameter list similar to variable declaration. In

mikroBasic PRO for AVR, parameters are always passed to procedure by value; to pass
argument by address, add the keyword 

byref

ahead of identifier.

Local declarations 

are optional declaration of variables and/or constants, local

for the given procedure. 

Procedure

body is a sequence of statements to be execut-

ed upon calling the procedure.

A procedure is called by its name, with actual arguments placed in the same
sequence as their matching formal parameters. The compiler is able to coerce mis-
matching arguments to the proper type according to implicit conversion rules. Upon
procedure call, all formal parameters are created as local objects initialized by val-
ues of actual arguments.

Procedure call is a self-contained statement.

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5