月末了，分享个lcd的电子指针式时钟挺酷的。

1万 · 2017-11-30 22:19

调用上面的函数实现画圆
void draw_circle() //画圆
{
get_circle(100,200,100,YELLOW);
get_circle(100,200,99,YELLOW);
get_circle(100,200,98,YELLOW);
get_circle(100,200,97,YELLOW);
get_circle(100,200,5,YELLOW);
}

1万 · 2017-11-30 22:19

接着就是画表盘的分布点了。
void draw_dotline() //画格点
{
u8 i;
u8 rome[][3]={"12","1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11" } ; //表盘数字
int x1,y1,x2,y2,x3,y3;
for(i=0;i<60;i++)
{
x1 = (int)(100 + (sin(i * PI / 30) * 92));
y1 = (int)(100 - (cos(i * PI / 30) * 92));
x2 = (int)(100 + (sin(i * PI / 30) * 97));
y2 = (int)(100 - (cos(i * PI / 30) * 97));
GUI_Line(x1,y1+100,x2,y2+100,RED);

if(i%5==0)
{
x1 = (int)(100 + (sin(i * PI / 30) * 85));
y1 = (int)(100 - (cos(i * PI / 30) * 85));
x2 = (int)(100 + (sin(i * PI / 30) * 97));
y2 = (int)(100 - (cos(i * PI / 30) * 97));
GUI_Line(x1,y1+100,x2,y2+100,RED);

x3 = (int)(92 + (sin((i ) * PI / 30) * 80));
y3 = (int)(92 - (cos((i ) * PI / 30) * 80));

GUI_Show12ASCII(x3,y3+100,rome[i/5],YELLOW,BLACK);
}

}
}

1万 · 2017-11-30 22:21

下面即将开始画指针了，这个函数有点麻烦

1万 · 2017-11-30 22:21

void draw_hand(int hhour,int mmin,int ssec) //画指针
{
int xhour, yhour, xminute, yminute, xsecond, ysecond; //表心坐标系指针坐标
xhour = (int)(60 * sin( hhour * PI / 6 + mmin * PI / 360 + ssec * PI / 1800));
yhour = (int)(60 * cos( hhour * PI / 6 + mmin * PI / 360 + ssec * PI / 1800));
xminute = (int)(90 * sin( mmin * PI / 30 + ssec * PI / 1800));
yminute = (int)(90 * cos( mmin * PI / 30 + ssec * PI / 1800));
xsecond = (int)(100 * sin( ssec * PI / 30));
ysecond = (int)(100 * cos( ssec * PI / 30));

GUI_Line(100 + xhour, 200 - yhour, 100 -xhour / 6, 200 + yhour / 6,RED);
GUI_Line(100 + xminute, 200 - yminute, 100 -xminute / 4, 200 + yminute / 4,BLUE);
GUI_Line(100 + xsecond, 200 - ysecond, 100 -xsecond / 3, 200 + ysecond / 3,GREEN);

}

1万 · 2017-11-30 22:22

最后一个差指针了，这个完了就可以把表盘显示在TFT上了
void draw_hand_clear(int hhour,int mmin,int ssec) //擦指针
{
int xhour, yhour, xminute, yminute, xsecond, ysecond; //表心坐标系指针坐标
xhour = (int)(60 * sin( hhour * PI / 6 + mmin * PI / 360 + ssec * PI / 1800));
yhour = (int)(60 * cos( hhour * PI / 6 + mmin * PI / 360 + ssec * PI / 1800));
xminute = (int)(90 * sin( mmin * PI / 30 + ssec * PI / 1800));
yminute = (int)(90 * cos( mmin * PI / 30 + ssec * PI / 1800));
xsecond = (int)(100 * sin( ssec * PI / 30));
ysecond = (int)(100 * cos( ssec * PI / 30));

GUI_Line(100 + xhour, 200 - yhour, 100 -xhour / 6, 200 + yhour / 6,BLACK);
GUI_Line(100 + xminute, 200 - yminute, 100 -xminute / 4, 200 + yminute / 4,BLACK);
GUI_Line(100 + xsecond, 200 - ysecond, 100 -xsecond / 3, 200 + ysecond / 3,BLACK);

}

1万 · 2017-11-30 22:24

我们只需要引入GUI.h和lcd.H可实现对TFT的初始化与操作，下面就是在主函数的数据处理了。

1万 · 2017-11-30 22:25

部分主函数代码，作为参考，可以实现指针表盘的操作。
TFT_Init();
TFT_ClearScreen(BLACK);
GUI_Show12ASCII(10,10,"This is a RTC text!",YELLOW,BLACK);
rtc_init();
clockinit_RTC();
draw_circle();
draw_dotline();
while(1)
{
if(timebz==1)
{
draw_hand_clear(hour,min,sec);
timebz=0;
timedata=RTC_GetCounter();//获取RTC计数器的值
hour=timedata/3600;
min=(timedata%3600)/60;
sec=timedata%60;
dat[0]=hour/10+'0';
dat[1]=hour%10+'0';
dat[2]=':';
dat[3]=min/10+'0';
dat[4]=min%10+'0';
dat[5]=':';
dat[6]=sec/10+'0';
dat[7]=sec%10+'0';
dat[8]='\0';
draw_hand(hour,min,sec);

}
draw_circle();
draw_dotline();
GUI_Show12ASCII(80,50,dat,YELLOW,BLACK);
}