单片机课程那个设计 简易秒表 程序修改 高分

Question

#include<reg51.h>
#define uchar unsigned char
uchar j,k,i,a,A1,A2,second;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uchar i)
{
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
void display(uchar sh_c,uchar g_c)
{
dula=0;
P0=table[sh_c];
dula=1;
dula=0;
wela=0;
P0=0xfe;
wela=1;
wela=0;
delay(5);
P0=table[g_c];
dula=1;
dula=0;
P0=0xfd;
wela=1;
wela=0;
delay(5);
}
void main()
{
while(1)
{
second++;
if(second==60)
second=0;
A1=second/10;
A2=second%10;
for(a=50;a>0;a--)
{
display(A1,A2);};
}
}

这是原程序 求高手 帮改成90秒的 然后 频率变慢一点
能设计个开始键和复位键
MIAO-MCU单片机实验板 用这块板做的

额 咱班的人好多做这个 老师让加点其他功能

做而论道 加下我QQ 280809863 我详细问下你哈

我们用的是这块板

Answer 1

试试看:
#include<reg51.h>
#define uchar unsigned char
uchar j, k, i, a, A1, A2, second = 0;
sbit dula = P2^6;
sbit wela = P2^7;

sbit RST = P3^1; //新增两个按键，引脚可由你自定
sbit START = P3^2;

uchar code table[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uchar i)
{
for(j = i; j > 0; j--) for(k = 125; k > 0; k--);
}

void display(uchar sh_c, uchar g_c)
{
P0 = table[sh_c]; dula = 1; dula = 0;
P0 = 0xfe; wela = 1; wela = 0;
delay(5);
P0 = table[g_c]; dula = 1; dula = 0;
P0 = 0xfd; wela = 1; wela = 0;
delay(5);
}

void main()
{
dula = 0; wela = 0;
while(START == 1) display(0, 0); //开始键.
while(1) {
if (RST == 0){ //复位键.
display(A1, A2);
if (RST == 0){
second = 0;
while(RST == 0) display(A1, A2);
}
}
A1 = second / 10;
A2 = second % 10;
for(a = 50; a > 0; a--)//这里的50，加大即可变慢.
display(A1, A2);
second++;
if(second == 60) //这里的60，改成90即可.
second = 0;
}
}

Answer 2

如果还弄不好,我帮你写一个!!

Answer 3

#include<reg51.h>

头文件是什么？