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Altera_Forum's avatar
Altera_Forum
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21 years ago

assembly prog

Hi Has anyone tried to write assembly language programs for nios II processor? If so plz tell me how to start the program i.e., i mean to say are any initial statements required like main(...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

you are writing NiosI asm for NiosII cpu ...

here's something: 

    .file    "Main.s"
    .section    .text
    .align    3
    .global    main
    .type    main, @function
main:
    //sp <- sp -8
    addi    sp, sp, -8
    //ra -> *(sp +4)    
    stw  ra,4(sp)      
    // fp -> *(sp)
  stw  fp,0(sp)    
  // fp -> sp
    mov  fp,sp        
aaa:    //#define LED_BASE 0x00000820
    movhi    r13, %hiadj(0x00000820)
    addi    r13, r13, %lo(0x00000820)
    
    //valeur par bit (1) allume  (0) eteint
    movhi    r12, %hiadj(255)
    addi    r12, r12, %lo(255)
    
    //allume led
    stwio    r12, 0(r13)
    
    call    delay1
....