getkey.c

这是一个远程温度计 MCU: AT89S52 温度传感器: DS18B20 晶振: 12MHz 使用串口连接,在PC端使用"超级终端"打开 设置如下: 波特率: 4800 数据

/***********************************************************************/
/*  This file is part of the C51 Compiler package                      */
/*  Copyright KEIL ELEKTRONIK GmbH 1993 - 2002                         */
/***********************************************************************/
/*                                                                     */
/*  GETKEY.C:  This routine is the general character input of C51.     */
/*  You may add this file to a uVision2 project.                       */
/*                                                                     */
/*  To translate this file use C51 with the following invocation:      */
/*     C51 GETKEY.C  <memory model>                                    */
/*                                                                     */
/*  To link the modified GETKEY.OBJ file to your application use the   */
/*  following Lx51 invocation:                                         */
/*     Lx51 <your object file list>, GETKEY.OBJ <controls>             */
/*                                                                     */
/***********************************************************************/

#include <reg51.h>

char _getkey()
{
    char c;

    while (!RI);
    c = SBUF;
    RI = 0;
    return (c);
}