用心讨教问题,看了不要路过呀,进来看看#include <reg52.h> #define uchar unsigned char #define uint unsigned int
uchar segment[]={0xc0,0Xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0x89,0xc7}; //数码管的段选 uchar display_temp[4]={0,0,0,0}; //用来装显示数据的空数组 uchar digit_select_line[]={0xef,0xdf,0xbf,0x7f}; uint time_count; uint carry_count,pulse_count; uchar flag;
sbit shurua = P2^0; //输入端A sbit shurub = P2^1; //输入端B sbit shuchu= P2^2; //输出段
求: 如果shurua和shurub都没有输入信号(0)时,shuchu无输出(0), 当shurua为1时,shuchu输出1,三秒后shurub没有输入1,则shuchu关闭输出(0) 只有当shurua和shurub在三秒前都有输入(1)时,shuchu输出(1)
南来的,北往的,哥哥,姐姐,都来帮帮俺吧, 给你洗脚了,
[ 本帖最后由 用心思考 于 2012-5-28 06:21 编辑 ] |