用74LS14控制一个发光二极管亮五秒灭五秒,再灭八秒亮两秒如此循环。
\u7528\u4e94\u4e00\u5355\u7247\u673ac\u8bed\u8a00\u7f16\u7a0b\uff0cp1\u53e3\u63a7\u5236\u516b\u4e2a\u53d1\u5149\u4e8c\u6781\u7ba1\uff0c\u5b9e\u73b0\u6bcf\u9694\u4e00\u79d2\uff0c\u4e24\u4e24\u70b9\u4eae\uff0c\u5e76\u5faa\u73af\u3002\u4e00\u3001#include
void delay(unsigned char Xms)//\u5ef6\u65f6Xms
{
int i,j;
for(X = i; X>0; X--)
for(j=110;j>0;j--);
}
void main()
{
P0 = 0x00; //P0.0~P0.7\u5206\u522b\u63a5\u516b\u4e2a\u53d1\u5149\u4e8c\u6781\u7ba1\uff0c\u521a\u5f00\u59cb\u5168\u706d
while(1)
{
delay(1000);
P0 = 0xc0;//\u70b9\u4eae\u524d\u4e24\u4e2a\u53d1\u5149\u4e8c\u6781\u7ba1P0.0\u548cP0.1;
delay(1000);//\u5ef6\u65f61\u79d2
P0 = 0x30;//\u70b9\u4eae\u7b2c\u4e09\u4e2a\u548c\u7b2c\u56db\u4e2aLED
delay(1000);
P0 = 0x0c;
delay(1000);
P0 = 0x03;
}
}
\u4e8c\u3001
#include
#include
#define uchar unsigned char
#define uint unsigned int
uchar temp, t0, t1;
bit t2;
sbit P10 = P1^0;
void main()
{
P10 = 1;
temp = 0xfe;
P0 = temp;
P2 = 0xff;
TMOD = 0x01;
TH0 = (65536 - 50000) / 256;
TL0 = (65536 - 50000) % 256;
ET0 = 1;
EA = 1;
TR0 = 1;
while(1);
}
void timer0() interrupt 1
{
TH0 = (65536 - 50000) / 256;
TL0 = (65536 - 50000) % 256;
t0++;
if(t0 == 10) {
t0 = 0;
t1++;
if(t1 == 8) {t1 = 0; t2 = ~t2; P10 = t2;}
temp = _crol_(temp, 1);
if(t2) {P0 = temp; P2 = 255;}
else {P2 = temp; P0 = 255;}
}
}
\u6269\u5c55\u8d44\u6599\uff1a
\u4f8b\u5982\uff1aa = 3\uff0cb = 5\uff0c\u73b0\u4ea4\u6362a\uff0cb\u7684\u503c\uff0c\u8fd9\u4e2a\u95ee\u9898\u5c31\u597d\u50cf\u4ea4\u6362\u4e24\u4e2a\u676f\u5b50\u91cc\u9762\u7684\u6c34\uff0c\u8fd9\u5f53\u7136\u8981\u7528\u5230\u7b2c\u4e09\u4e2a\u676f\u5b50\uff0c\u5047\u5982\u7b2c\u4e09\u4e2a\u676f\u5b50\u662fc\uff0c\u90a3\u4e48\u6b63\u786e\u7684\u7a0b\u5e8f\u4e3a\uff1ac = a\uff1b a = b\uff1b b = c\uff1b\u6267\u884c\u7ed3\u679c\u662fa = 5\uff0cb = c = 3\u5982\u679c\u6539\u53d8\u5176\u987a\u5e8f\uff0c\u5199\u6210\uff1aa = b\uff1b c = a\uff1b b =c\uff1b\u5219\u6267\u884c\u7ed3\u679c\u5c31\u53d8\u6210a = b = c = 5\uff0c\u4e0d\u80fd\u8fbe\u5230\u9884\u671f\u7684\u76ee\u7684\uff0c\u521d\u5b66\u8005\u6700\u5bb9\u6613\u72af\u8fd9\u79cd\u9519\u8bef\u3002
\u987a\u5e8f\u7ed3\u6784\u53ef\u4ee5\u72ec\u7acb\u4f7f\u7528\u6784\u6210\u4e00\u4e2a\u7b80\u5355\u7684\u5b8c\u6574\u7a0b\u5e8f\uff0c\u5e38\u89c1\u7684\u8f93\u5165\u3001\u8ba1\u7b97\u3001\u8f93\u51fa\u4e09\u6b65\u66f2\u7684\u7a0b\u5e8f\u5c31\u662f\u987a\u5e8f\u7ed3\u6784\uff0c\u4f8b\u5982\u8ba1\u7b97\u5706\u7684\u9762\u79ef\uff0c\u5176\u7a0b\u5e8f\u7684\u8bed\u53e5\u987a\u5e8f\u5c31\u662f\u8f93\u5165\u5706\u7684\u534a\u5f84r\uff0c\u8ba1\u7b97s = 3.14159*r*r\uff0c\u8f93\u51fa\u5706\u7684\u9762\u79efs\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-c\u8bed\u8a00
again:
clr p0.0 ; \u706f\u4eae \u4f4e\u7535\u5e73\u6709\u6548
lcall delay500ms; \u5ef6\u65f60.5\u79d2
setb p0.0 ;
lcall delay500ms;
clr p0.0 ;
lcall delay500ms;
setb p0.0 ;
lcall delay500ms; 0.5\u79d2*4=2\u79d2
lcall delay500ms;
lcall delay500ms;
lcall delay500ms;
sjmp again ;\u5faa\u73af
;\u4ee5\u4e0b\u5ef6\u65f6\u7a0b\u5e8f\uff0c\u6539\u53d8 r7\u7684\u6570\u5c31\u53ef\u4ee5\u6539\u53d8\u65f6\u95f4
delay500ms:
mov r7,#0
mov r6,#0
delay500ms1:
djnz r6,delay500ms1
djnz r7,delay500ms1
ret
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