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/********************************************************/
我用的51單片機(jī)晶振頻率是12MHz，我打算利用計(jì)數(shù)器每隔1秒讓led輪流亮，數(shù)碼管每隔兩秒亮，
但是實(shí)際情況是數(shù)碼管保持兩秒一亮，但是led確非�；靵y，所以我想讓大家看看是什么問題，下面
貼代碼
/**********************************************************/
#include <reg52.h>
#include <intrins.h>
typedef unsigned int uint;
typedef unsigned char uchar;
uchar code table[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
sbit segment_selection = P2^1;//段選
sbit bit_selection = P2^0;//位選
uchar tt;
uchar temp;
uchar num;
void inter0() interrupt 1
{
TH0 = (65535-50000)/256;
TL0 = (65535-50000)%256;
tt++;
/*下面注釋的代碼在while（1）里面寫有問題，但是在中斷函數(shù)里寫就沒問題
// if(tt == 20 || tt == 40)
// {
// temp = _cror_(temp, 1);
// P1 = temp;
// if(tt == 40)
// {
// tt = 0;
// segment_selection = 1;
// P0 = table[num];/從0到f;
// segment_selection = 0;
// P0 = 0x00;
// num++;
// if(num == 16)
// {
// num = 0;
// }
// }
// }
}
void main()
{
num = 0;
temp = 0xfe;
tt = 0;
TMOD = 0x01;
TH0 = (65535-50000)/256;
TL0 = (65535-50000)%256;
EA = 1;/單片機(jī)總中斷開啟
ET0 = 1;/定時(shí)器0中斷開啟
TR0 = 1;/定時(shí)器0中斷允許位開啟
while(1)
{
if( tt == 20)//這里我是打算每隔1秒led循環(huán)亮
{
P1 = temp;
temp = _crol_(temp, 1);
}
if(tt == 40)
{
tt = 0;
segment_selection = 1;
P0 = table[num]
segment_selection = 0;
P0 = 0x00;//消隱
num++;
if(num == 16)
{
num = 0;
}
}
//在while（1）循環(huán)里這么寫有問題，在中斷函數(shù)里寫就沒問題
}
}
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