求单片机大神指教，1．要求单片机完成功能：利用P2口控制一个共阴极的数码管，使之循环显示0—9数字…… 现有一个51单片机系统，P2口接一个共阳极的LED数码管，编...
C51\u5355\u7247\u673aP2\u53e3\u76f4\u63a5\u9a71\u52a8\u4e00\u4e2a\u5171\u9634\u6781\u6570\u7801\u7ba1k\u53ef\u4ee5\u5417\uff1f\u4e3a\u4ec0\u4e48\uff1f\u8c22\u8c22\u3002\u4f60\u662f\u8981\u7528P2\u53e3\u9a71\u52a8\u6570\u7801\u7ba1\u7684\u6bb5\u5417\uff1f\u53ef\u4ee5\u7684\uff0c\u5185\u90e8\u6709\u4e0a\u62c9\u5230\u7535\u6e90\uff0c\u4e00\u4e2a\u6570\u7801\u7ba1\u6ca1\u95ee\u9898\u7684\uff0c\u6bcf\u4e2a\u5355\u7247\u673a\u5f15\u811a\u7684\u8f93\u51fa\u7535\u6d41\u80fd\u529b\u53ef\u8fbe10mA\u4ee5\u4e0a\u3002
\u5982\u679c\u662fP0\u53e3\u76f4\u63a5\u9a71\u52a8\u5219\u4e0d\u884c\uff0c\u56e0\u4e3aP0\u662f\u5f00\u6f0f\u7684\uff0c\u672c\u8eab\u4e0d\u80fd\u8f93\u51fa\u9ad8\u7535\u5e73\uff0c\u53ea\u80fd\u662f\u52a0\u4e0a\u62c9
\u4f60\u600e\u4e48\u4e0d\u7528\u4e2d\u65ad\u6765\u5199\u5462\u3002\u7528delay\u6765\u5199\u4e5f\u884c\uff0c\u4f46\u662f\u8fd0\u884c\u6548\u7387\u4e0d\u9ad8\uff0c\u4f60\u522b\u201cP1=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;\u201d\u8fd9\u6837\u8d4b\u503c\uff0c\u4f60\u7528
main\uff08\uff09
{
char i=0\uff1b
delay\uff08\uff09
{
//\u8fd9\u90e8\u5206\u4f60\u81ea\u5df1\u5199\u4e86
}
while\uff081\uff09
{
delay\uff08\uff09\uff1b
switch(i)
{
case 0:
P1=0xc0\uff1b
i++\uff1b
break\uff1b
case 1:
//\u4f60\u81ea\u5df1\u4eff\u7167\u4e00\u4e0b\u5427\uff0c\u8fd9\u91cc
i++\uff1b
break\uff1b
//\u8fd9\u91cc \uff0c\u4f60\u81ea\u5df1\u4eff\u7167\u4e00\u4e0b\u5427\uff0c\u4e00\u76f4\u5230 case 7:
case 8:
P1=0x90\uff1b
i=0\uff1b
break\uff1b
default:
break;
}
}
}
\u8fd9\u91cc\u53ea\u7ed9\u4e86\u4f60\u521d\u6b65\u5165\u95e8\u7684\u601d\u8def\uff0c\u6b63\u662f\u5199\u7a0b\u5e8f\u522b\u8fd9\u4e48\u5e72\uff0cdelay\uff08\uff09\u80fd\u4e0d\u7528\u522b\u7528\uff0c\u8fd9\u4e1c\u897f\u4f1a\u8ba9\u4f60\u7684CPU\u5835\u585e\uff0c\u4f7f\u5f97\u5176\u5229\u7528\u7387\u5927\u5927\u964d\u4f4e\uff0c\u7684\u5982\u679c\u4ee3\u7801\u5927\u4e86\uff0c\u53ef\u80fd\u4f1a\u8ba9\u4f60\u7684CPU\u8fd0\u884c\u8d77\u6765\u5f88\u5361\u3002\u53e6\u5916\u4f60\u7a0b\u5e8f\u91cc\u51fa\u73b0\u7684\u662fP1\uff0c\u4f46\u4f60\u7684\u9898\u76ee\u63cf\u8ff0\u662fP2\uff0c\u5982\u679c\u771f\u662fP2\u53e3\uff0c\u90a3\u4e48\u6211\u7ed9\u4f60\u7684\u7a0b\u5e8f\u4e2dP1\u8981\u6539\u4e3aP2\uff0c\u8fd8\u6709\u5c31\u662f\u8fd8\u4e0d\u77e5\u4f60\u7684\u786c\u4ef6\u63a5\u7684\u5bf9\u4e0d\uff0c\u8981\u6ce8\u610f\u4e00\u70b9\uff0c51\u5355\u7247\u673a\u662f\u5f31\u4e0a\u62c9\u7684\u3002
#include<reg51.h>
#define uchar unsigned char
uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f};
sbit rstkey=P2^2;
sbit speaker=P2^0;
void delay()//延时约400毫秒
{
uchar i,j;
for(i=0;i<200;i++)
for(j=0;j<250;j++);
}
main()
{
uchar i;
while(1)
{
P1=table[i];
delay();
i++;
i%=10;
}
}
需要做实物吗？ 还是只要画图编程？
绛旓細at89s51鍙互鐢ㄧ殑
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