text1.c

来自「温度采集显示与PID控制」· C语言 代码 · 共 37 行

#ifdef ASM
         unsigned long shiftR1(register unsigned long);
#else    
         extern unsigned long shiftR1(register unsigned long);
#endif
//end of asm.h

//<asm.c>
#define ASM

#include <reg52.h>
#pragma OT(4,speed)
unsigned long shiftR1(register unsigned long    x)
{
    #pragma asm
    clr c
    mov a,r4
    rrc a
    mov r4,a

    mov a,r5
    rrc a
    mov r5,a

    mov a,r6
    rrc a
    mov r6,a

    mov a,r7
    rrc a
    mov r7,a
    
    #pragma endasm
    return(x);
}
//end of asm.c