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#include <reg51.h>
unsigned long pinlv=0;
unsigned char anjian;
void huoqu()
{ while(P2==0Xff&&P3==0xff);
while(P3!=0xfb)
switch(P2)
{ case 0xfe:anjian=0; while(P2!=0xff); break;
case 0xfd:anjian=1; while(P2!=0xff); break;
case 0xfb:anjian=2; while(P2!=0xff); break;
case 0xf7:anjian=3; while(P2!=0xff); break;
case 0xef:anjian=4; while(P2!=0xff); break;
case 0xdf:anjian=5; while(P2!=0xff); break;
case 0xbf:anjian=6; while(P2!=0xff); break;
case 0x7f:anjian=7; while(P2!=0xff); break;
default:break;
}
switch(P3)
{
case 0xfe:anjian=8; while(P3!=0xff); break;
case 0xfd:anjian=9; while(P3!=0xff); break;
default:break;
pinlv=pinlv*10+anjian;}
}
void timer()
{
unsigned long time;
unsigned int i;
time=1000000/pinlv/2;
if(time<1) time=1;
if(time>1000000)time=1000000;
TMOD=0X02;
TH0=0;TL0=0;
for(i=0;i<time/256;i++)
{ TR0=1;
while(!TF0);
TF0=0;
}
TR0=0;
TH0=256-time%256;
TL0=256-time%256;
TR0=1;
while(!TF0);
TF0=0;
TR0=0;
}
void main()
{
huoqu();
while(1)
{
P0=0X01;timer();
P0=0X0;timer();
}
}
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方波發生器程序.zip
2017-5-22 16:48 上傳
點擊文件名下載附件
下載積分: 黑幣 -5
19.14 KB, 下載次數: 6, 下載積分: 黑幣 -5
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