Control Directives usage PIC assembly

DrRakha

Control Directives usage PIC assembly

Code:

if <expr> ; directives for conditional assembly
else
endif
Example.
if version == 100
movlw D’10’
movwf io1,A
else
movlw D’26’
movwf io2,A
endif
end ; indicates the end of the program

#include “<include_file>” (or #include <include_file>)
#include “lcd_util.asm” ; include the lcd_util.asm file from current directory
#include <p18F8680.inc> ; include the file p18F8680.inc from the installation
; directory of mplab.
radix <default_radix>

sets the default radix for data expression
the default radix values are: hex, dec, or oct

radix dec ; set default radix to decimal

[<label>] code [<ROM address>]

Declares the beginning of a section of program code.
If no label is specified, the section is named “.code”.
The starting address of the section is either included in the directive or
assigned at link time if not specified in the directive.

Code:

reset code 0x00
goto start
#define <name> [<string>] ; defines a text substitution string
#define loop_cnt 30
#define sum3(x,y,z) (x + y + z)
#define seed 103
#undefine <label> ; deletes a substitution string

Code:

#include “<include_file>” (or #include <include_file>)
#include “lcd_util.asm” ; include the lcd_util.asm file from current directory
#include <p18F8680.inc> ; include the file p18F8680.inc from the installation
; directory of mplab.

radix <default_radix>

sets the default radix for data expression
the default radix values are: hex, dec, or oct

radix dec ; set default radix to decimal

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Control Directives usage PIC assembly