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13.c
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13.c
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/*
object: 定时器 以间隔500 ms在6位数码管上依次显示0-F重复 interrupt 1
info: - T1 initial number 50ms 45872
all six seven-segment display show the same thing
静态显示
TODO: 1. 全数码管动态显示,从右向左滚动/刚开始第一位0,最后一位5,然后依次递增类似于滚动的样式
*/
#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
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};
uchar num,num1;
//void delayms (uchar ms)
//{
// uint i,j;
// for (i=ms; i>0; i--)
// for (j=110; j>0; j--);
//}
void T0_timer() interrupt 1
{
// 50ms * 10 = 500ms
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
num++;
if (num == 10) // 500 ms reached
{
num=0;
num1++;
if (num1 == 16)
{
num1=0;
}
}
}
void display (uchar num)
{
dula=1;
P0=table[num];
dula=0;
}
void init ()
{
TMOD=0x01;
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
EA=1;
ET0=1;
TR0=1;
wela=1;
P0=0xc0;
wela=0;
num=0;
num1=0;
}
void main (void)
{
init();
while(1)
{
display(num1);
}
}