Mikroelektronika MIKROE-724 データシート

238

mikoBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

Directive org

Directive 

org

 specifies the starting address of a constant or a routine in ROM. It is appended to the constant or a 

routine declaration.

To place a constant array in Flash memory, write the following:

‘ Constant array MONTHS will be placed starting from the address 0x800

const MONTHS as byte[12] = (31,28,31,30,31,30,31,31,30,31,30,31) org 0x800

If you want to place simple type constant into Flash memory, instead of following declaration:

const SimpleConstant as byte = 0xAA org 0x2000

use an array consisting of single element:

const SimpleConstant as byte[1] = (0xAA) org 0x800

In first case, compiler will recognize your attempt, but in order to save Flash space, and boost performance, it will 

automatically replace all instances of this constant in code with it’s literal value. 

In the second case your constant will be placed in Flash in the exact location specified.

To place a routine on a specific address in Flash memory you should write the following:

sub procedure proc(dim par as word) org 0x200

...

org

 directive can be used with 

main

 routine too. For example:

program Led_Blinking 

main: org 0x800             ‘ main procedure starts at 0x800

...

Use the 

orgall

 directive to specify the address above which all routines and constants will be placed. Example:

main:

  orgall(0x200) ‘ All the routines, constants in main program will be above the address 

0x200

  ...