1 
    #include <studio.h>
    #include <dos.h>
    void interrupt (*int9save) (void)
    void interrupt eliminate_multiple_press(void)
    {
    int9save=getvect(9);
    setvect(9,eliminate_multiple_press);
    asm {
    MOV AH,0
    int 16h
    MOV scan_temp,AH
    CMP ZF,0
    }
    }
    void interrupt uneliminate_multiple_press()
    {
    setvect(9,int9save);
    }
    void main(void)
    {
    char str[100];
    int check=1;
    char scan_temp;
    unsigned int scan_code ;
    eliminate_multiple_press();
    printf("enter a word\n");
    scanf("%s",str);
    scan_code=(unsigned int) scan_temp;
    printf("the word is:\n");
    printf("%s",str);
    uneliminate_multiple_press();
    return ;
    }

ちょっと私はアセンブリコードを書いています..私は1つのボタンのように扱われる長いボタンを作るように私に頼む割り込み質問を解決しようとしています、そして私はここで立ち往生しています!! 誰かが私を助けてくれるか、続行方法を教えてください...ボタンZF == 0を押すと、ボタンZF = = 1を離れると、これは非常に役立つかもしれません

4

1 に答える 1

2

独自のキーボード割り込みハンドラーでは、次のようなものを使用できます (これは YASM/NASM 構文であり、テストされていません)。

編集:コードを書き直し、コメントとリンクを追加しました。

@my_int9:
    cli
    push ax     ; push ax (you can create a stack frame too, if you wish).
    push bx     ; push bx.

    in al,0x60  ; read scancode from keyboard port 60h to al.

    cmp al,[cs:last_scancode] ; compare the current and last scancodes.
    je @ready                 ; jump if its the same scancode, nothing to do.

    test al,0x80              ; test highest bit of al to see if it's release
                              ; or not.
                              ; test does logical AND without saving the result,
                              ; it only updates the flags
                              ; (and al,0x80 would be OK too).

    jnz @key_released         ; jump if it's a released key.

    ; OK, we have a new key.

@new_key:
    movzx bx,al               ; copy the scancode from al to bx.

    mov [cs:last_scancode],al ; store the current scancode into memory.

    ; Do something with the new key here.

    ; This is an example.

    mov al,1
    mov [cs:bx+keys_pressed],al ; set the corresponding byte of array to 1
                                ; (pressed).
    mov [cs:something_to_do],al ; set the flag "something to do" to 1.
                                ; (so that the main code needs to scan through
                                ; keys_pressed array only when there's at least
                                ; 1 key that hasn't been handled yet).

@key_released:
    ; Do something here upon the key release if you wish...
    ; This really depends on what do you want to if with released keys.

    ; If you want that keypresses are handled even after the corresponding key
    ; is  are released and that the the key release shouldn't cause any action,
    ; (in the case you don't poll that repeatedly), don't do anything here.
    ;
    ; If you want that keypresses are _not_ handled after the release, then set
    ; the corresponding byte of keys_pressed array to 0
    ; (uncomment the 3 lines below):
    ;
    ; and al,0x7F                     ; clear the highest bit.
    ; movzx bx,al                     ; copy the scancode from al to bx.
    ; mov [cs:bx+keys_pressed],byte 0 ; mark the key as not pressed.

@ready:
    mov al,0x20             ; write byte 20h to port 20h to inform PIC.
    out 0x20,al             ; (programmable interrupt controller) that it's OK
                            ; to continue sending interrupts.
    pop bx
    pop ax
    sti
    iret

last_scancode db 0

keys_to_handle db 0           ; in the main code you can poll for this.
                              ; After handling the keys, set this to 0.

keys_pressed times 128 db 0   ; db 128 dup 0 in some other assemblers
                              ; In the main program code scan through this if
                              ; keys_to_handle is not zero, and set the
                              ; corresponding byte to 0 to not handle it twice.

メインコード (割り込みコントローラーには属しません):

@main_code_loop:
    test [cs:keys_to_handle], byte 0xFF ; check if there are keys to handle.
    jz @no_keys_to_handle               ; no, nothing to do.

    ; here scan through entire keys_pressed array and set handled keys'
    ; corresponding bytes to 0.
    ; remember to loop through the entire array, there can be several keys to handle.

    mov [cs:keys_to_handle], byte 0     ; set keys_to_handle byte to 0.

@no_keys_to_handle:
    ; do something else

いくつかの便利なリンク:

OSDev: Interrupts : 割り込みに関する有用な記事。

OSDev: "8042" PS/2 Controller : キーボード操作に関する有用な情報。

OSDev: 8259 PIC : 8259 Programmable Interrupt Controller に関する情報。

于 2013-01-16T17:47:39.270 に答える