12864指针时钟单片机程序,指针转动时有痕迹没擦除

ID:245302 · 发表于 2018-3-25 21:05

做的一个12864指针时钟程序，但是指针显示有问题，上一秒指针转到下一秒的位置时，有痕迹没有擦除，那位大佬可以帮给我看一下怎么回事，帮忙改一下。

#include <reg52.h>
#include"math.h"
#define PI 3.1415926
#define uchar unsigned char
#define uint unsigned int
#define basic 0x30 //基本指令集
#define extend 0x34 //扩充指令集
#define drawon 0x36 //绘图显示关
#define drawoff 0x34
sbit LCD_RS = P0^7; //寄存器选择输入
sbit LCD_RW = P0^6; //液晶读/写控制
sbit LCD_EN = P0^5; //液晶使能控制
sbit LCD_PSB = P0^4;
uint lay=0;
struct clock
{
uchar hour;
uchar minute;
uchar second;
}point_time[2];
void delay(uint x) //延时函数
{ int i,j;
for(i=x;i>0;i--)
for(j=11;j>0;j--);
}
void write_com(uchar com) //写命令
{
LCD_RS = 0;
LCD_RW = 0;
LCD_EN = 0;
P2 = com;
delay(1);
LCD_EN = 1;
delay(1);
LCD_EN = 0;
}
void write_dat(uchar dat) //写数据
{
LCD_RS = 1;
LCD_RW = 0;
LCD_EN = 0;
P2 = dat;
delay(1);
LCD_EN = 1;
delay(1);
LCD_EN = 0;
}
uchar read_date(void)
{ uchar temp;
P2=0xff;
LCD_RS = 1;
LCD_RW = 1;
LCD_EN = 1;
delay(1);
temp=P2;
LCD_EN = 0;
return temp;
}
void lcd_init() //初始化
{
LCD_PSB = 1; //并口方式
write_com(0x34); //扩充指令
delay(10);
write_com(0x30); //基本指令操作
delay(10);
write_com(0x0C); //显示开，关光标
delay(10);
write_com(0x01); //清除LCD的显示内容
delay(10);
}
void screen_clear() //清屏
{
uchar i,j,k;
write_com(0x34);
for(i=0;i<2;i++)
{ for(j=0;j<32;j++)
{ write_com(0x80+j);
delay(1);
if(i==0)
{ write_com(0x80);
delay(1);
}
else
{
write_com(0x88);
delay(1);
}
for(k=0;k<16;k++)
{
write_dat(0x00);
write_dat(0x00);
delay(1);
}
}
}
write_com(0x36);
write_com(0x30);
}
void point(uchar x,uchar y,uchar color) //打点函数
{
uchar row,collum,cbite;
uchar tempH,tempL;
write_com(0x34);
write_com(0x36);
collum=x>>4;
cbite=x&0x0f;
if(y<32)row=y;
else
{
row=y-32;
collum+=8;
}
write_com(0x80+row);
write_com(0x80+collum);
read_date();
tempH=read_date();
tempL=read_date();
write_com(0x80+row);
write_com(0x80+collum);
if(color)
{
if(cbite<8)
{
tempH|=(1<<(7-cbite));
}
else
{
tempL|=(1<<(15-cbite));
}
}
else
{
if(cbite<8)
{
tempH&=(1<<(7-cbite));
}
else
{
tempL&=~(1<<(15-cbite));
}
}
write_dat(tempH);
write_dat(tempL);
}
void xline(uchar x0,uchar x1,uchar y,uchar color)
{
uchar temp;
if(x0>x1)
{
temp = x1;
x1 = x0;
x0 = temp;
}
do
{
point(x0,y,color);
x0++;
}while(x1>=x0);
}
void yline(uchar x,uchar y0,uchar y1,uchar color)
{
uchar temp;
if(y0>y1)
{
temp = y1;
y1 = y0;
y0 = temp;
}
do
{
point(x,y0,color);
y0++;
}while(y1>=y0);
}
void line(uchar x0,uchar y0,uchar x1,uchar y1,uchar color)
{
char dx,dy;
char xsym,ysym;
char xx2,yx2;
char di;
dx = x1-x0;
dy = y1-y0;
if(dx>0)
xsym = 1;
else
{
if(dx<0)
xsym = -1;
else
{
yline(x0,y0,y1,color);
return ;
}
}
if(dy>0)
ysym = 1;
else
{
if(dy<0)
ysym = -1;
else
{
xline(x0,x1,y0,color);
return ;
}
}
dx = xsym*dx; //取绝对值
dy = ysym*dy;
xx2 = dx*1;
yx2 = dy*1;
if(dx>=dy)
{
di = yx2 - dx;
while(x0 != x1)
{
point(x0,y0,color);
x0 += xsym;
if(di<0)
di += yx2;
else
{
di += yx2 - xx2;
y0 += ysym;
}
}
point(x0,y0,color);
}
else
{
di = xx2 - dy;
while(y0 != y1)
{
point(x0,y0,color);
y0 += ysym;
if(di<0)
di += xx2;
else
{
di += xx2 - yx2;
x0 += xsym;
}
}
point(x0,y0,color);
}
}
void circle(uchar x0,uchar y0,uchar r)
{
char a,b;
char di;
if(r>31||r==0)
return ;
a = 0;
b = r;
di = 3-2*r;
while(a<=b)
{
point(x0+a,y0-b,1); //第一象限上半
point(x0+b,y0-a,1); //第一象限下半
point(x0-b,y0-a,1); //第二象限下半
point(x0-a,y0-b,1); //第二象限上半
point(x0-b,y0+a,1); //第三象限上半
point(x0-a,y0+b,1); //第三象限下半
point(x0+b,y0+a,1); //第四象限上半
point(x0+a,y0+b,1); //第四象限下半
delay(100);
a++;
if(di<0)
di += 4*a+6;
else
{
di += 10+4*(a-b);
b--;
}
}
}
uchar timex(uchar circle_x,uchar Length,uchar Angle)
{
uchar x;
if((Angle>0) && (Angle<=15))
{
x = circle_x + Length * (sin(PI * Angle / 30));
}
else if(Angle > 15 && Angle <= 30)
{
x = circle_x + Length * cos((PI * Angle) / 30 - (PI / 2 ));
}
else if(Angle > 30 && Angle <= 45)
{
x = circle_x - Length * sin((PI * Angle) / 30- PI);
}
else
{
x = circle_x-Length * cos((PI * Angle) / 30 - ((3 * PI) / 2));
}
return x;
}
uchar timey(uchar circle_y,uchar Length,uchar Angle)
{
uchar y;
if((Angle>0) && (Angle<=15))
{
y = circle_y - Length * (cos(PI * Angle / 30));
}
else if(Angle > 15 && Angle <= 30)
{
y = circle_y + Length * sin((PI * Angle) / 30 - (PI / 2 ));
}
else if(Angle > 30 && Angle <= 45)
{
y = circle_y + Length * cos((PI * Angle) / 30- PI);
}
else
{
y = circle_y - Length * sin((PI * Angle) / 30 - ((3 * PI) / 2));
}
return y;
}
void zhizhen(uchar x0,uchar y0,struct clock aa,uchar color)
{
line(x0,y0,timex(x0,x0-5,aa.second),timey(y0,y0-5,aa.second),color);
line(x0,y0,timex(x0,x0-9,aa.minute),timey(y0,y0-9,aa.minute),color);
line(x0,y0,timex(x0,x0-14,aa.minute/10+5*(aa.hour%12)),timey(y0,y0-14,aa.minute/10+5*(aa.hour%12)),color);
}
void timer0()
{
TMOD = 0X01;
TH0 = 0X4c;
TL0 = 0X00;
TR0 = 1;
ET0 = 1;
EA = 1;
}
void display(uchar x0,uchar y0)
{
if(point_time[0].second != point_time[1].second)
{
line(x0,y0,timex(x0,x0-5,point_time[0].second),timey(y0,y0-5,point_time[0].second),0);
}
if(point_time[0].minute != point_time[1].minute)
{
line(x0,y0,timex(x0,x0-9,point_time[0].minute),timey(y0,y0-9,point_time[0].minute),0);
}
if((point_time[0].minute/10+5*(point_time[0].hour%12)) != (point_time[1].minute/10+5*(point_time[1].hour%12)))
{
line(x0,y0,timex(x0,x0-14,point_time[0].minute/10+5*(point_time[0].hour%12)),timey(y0,y0-14,point_time[0].minute/10+5*(point_time[0].hour%12)),0);
}
zhizhen(x0,y0,point_time[1],1);
point_time[0] = point_time[1];
}
void main()
{
uchar j;
lcd_init();
screen_clear();
delay(1);
screen_clear();
delay(1);
write_com(0x01);
delay(1);
for(j=0;j<60;j++)
{
if((j%5)==0) //画刻度
{
line(timex(31,30,j),timey(32,30,j),timex(31,27,j),timey(32,27,j),1);
}
}
point_time[1].second = 50;
point_time[1].minute = 29;
point_time[1].hour = 7;
point_time[0] = point_time[1];
circle(31,32,31);
timer0();
while(1);
}
void zhongduan() interrupt 1
{
uint num=0;
lay++;
if(num==0)
{
if(lay == 20)
{
lay = 0;
point_time[1].second += 1;
if(point_time[1].second == 60)
{
point_time[1].second = 0;
point_time[1].minute += 1;
if(point_time[1].minute == 60)
{
point_time[1].minute = 0;
point_time[1].hour += 1;
if(point_time[1].hour == 12)
{
point_time[1].hour = 0;
}
}
}
display(31,32);
}
}
}

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