Mikroelektronika MIKROE-724 データシート

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mikoBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

mikroBasic PRO for dsPIC30/33 and PIC24 allows embedding assembly in the source code by means of the 

asm 

statement. Note that you cannot use numerals as absolute addresses for register variables in assembly instructions. 

You may use symbolic names instead (listing will display these names as well as addresses).

You can group assembly instructions with the 

asm

 keyword:

   block of assembly instructions

The only types whose name remains the same in asm as it is in the mikroBasic PRO for dsPIC30/33 and PIC24 are 

registers, e.g. INTCON, PORTB, WREG, GIE, etc.

mikroBasic PRO for dsPIC30/33 and PIC24 comments are allowed in embedded assembly code.

Accessing variables

Depending on the place of declaration, accessing a variable can be done in several ways :

 

- 

Accessing global variable: 

 

 1. If declared under implementation section (visible only in the file where it was declared): 

 

     

<source_file_name>_<variable_name>. 

 

 2. If declared in the interface section (visible throughout the whole project): 

_<variable_name>

. 

 

 3. If accessing registers (declared through 

register, rx 

or

 sfr

 specifiers, visible throughout the whole  

 

     project): 

<variable_name>

. 

 

- 

Accessing local variable: 

<routine_name>_<variable_name>. 

 

- 

Accessing routine parameter: 

FARG_<routine_name>_<variable_name>. 

Here is an example of using asm instructions:

program asm_example

dim myvar as word absolute 0x2678

dim myvar1 as longword

const msg = “Hello” org 0x1234

sub procedure proc() org 0x2346

  asm

    nop

  end asm

main :

  myvar = 5

  myvar1 = 0xABCD1234