Rotacia v C pre 8051

[David Burda]

Reseni :
 **********************************************************
 for( BitCnt =0; BitCnt <8; BitCnt++ )
 {
 ACC+=ACC;
 SDAPin=CY;
  };
 **********************************************************



> Dobry den!
>
> Mam maly problem. Ako napisem v C pre 8051 (Keil ľVision 2) tento kusok
> programu bez toho, aby som pouzil #pragma ASM?
>
>
> **********************************************************
> SendByte:  MOV     BitCnt,#8      ;Set bit count.
>
> SBLoop:    RLC     A              ;Send one data bit.
>            MOV     SDAPin,C       ;Put data bit on pin.
>            DJNZ    BitCnt,SBloop  ;Repeat until all bits sent.
> **********************************************************
>
>
> Zatial to mam vyriesene takto:
>
> **********************************************************
> BitCnt = 8; // Set bit count.
>
> for( BitCnt = 8; BitCnt >0; BitCnt -- )
> {
> #pragma ASM
> RLC     A
> MOV     SDAPin,C
> #pragma endasm
> };
> **********************************************************
>
> Ide mi o instrukciu RLC. V manualy ku Keilu je popisana funkcia _crol_ a
> _cror_, ktora robi rotaciu, ale vysledok je znova char. Ja by som
> potreboval nejaku funkciu zodpovedajucu RLC alebo nieco, co by malo ako
> vystup char(hodnota po rotacii) a bit (Carry).
>
> Dakujem za tipy.
>
> R. Kaliciak
>