我在做第八届省赛的时候,在实现第一个功能,数码管选中的单元以1s为间隔闪烁时,刚开始的那两三下是正常按照1s闪烁的,但是接下来就会有以下闪的快一些,然后又正常几个,接着又有一个闪得快些,这是为什么呢?应该怎么改呢?
main.c
#include<STC15F2K60S2.H>
#include"hardware.h"
unsigned char mode=0;//时钟显示
unsigned char stat=0;
unsigned char t_h=23;
unsigned char t_m=59;
unsigned char t_s=50;
//-----------------------------------------------------------------
void Workingkey()
{
if(timer10ms>=10)
{
timer10ms=0;
Scankey();
if(key_value==7 && key_stat==2)
{
timer500ms=0;
stat=0;
switch(mode)
{
case 0:
mode=1;//h
break;
case 1:
mode=2; //m
SMG_buf[0]=t_h/10;
SMG_buf[1]=t_h%10;
break;
case 2:
mode=3; //s
SMG_buf[3]=t_m/10;
SMG_buf[4]=t_m%10;
break;
case 3:
mode=0;
SMG_buf[6]=t_s/10;
SMG_buf[7]=t_s%10;
break;
}
}
}
}
//-----------------------------------------------------------------
void SMG_Display()
{
if(mode==0)
{
SMG_buf[0]=t_h/10;
SMG_buf[1]=t_h%10;
SMG_buf[2]=17;
SMG_buf[3]=t_m/10;
SMG_buf[4]=t_m%10;
SMG_buf[5]=17;
SMG_buf[6]=t_s/10;
SMG_buf[7]=t_s%10;
}
}
//-----------------------------------------------------------------
//-----------------------------------------------------------------
void SMG_ss()
{
if(timer500ms>=500)
{
timer500ms=0;
if(mode==1)
{
if(stat==0)
{
SMG_buf[0]=16;
SMG_buf[1]=16;
stat=1;
}
else if(stat==1)
{
SMG_buf[0]=t_h/10;
SMG_buf[1]=t_h%10;
stat=0;
}
}
else if(mode==2)
{
if(stat==0)
{
SMG_buf[3]=16;
SMG_buf[4]=16;
stat=1;
}
else if(stat==1)
{
SMG_buf[3]=t_m/10;
SMG_buf[4]=t_m%10;
stat=0;
}
}
else if(mode==3)
{
if(stat==0)
{
SMG_buf[6]=16;
SMG_buf[7]=16;
stat=1;
}
else if(stat==1)
{
SMG_buf[6]=t_s/10;
SMG_buf[7]=t_s%10;
stat=0;
}
}
}
}
//-----------------------------------------------------------------
void main()
{
led_output();
ws_output();
Timer1Init();
while(1)
{
Workingkey();
SMG_Display();
SMG_ss();
}
}
hardware.c
#include<STC15F2K60S2.H>
#include"hardware.h"
/************* 本地常量声明 **************/
unsigned char code t_display[]={ //标准字库
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
//black - H J K L N o P U t G Q r M y
0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46}; //0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1
unsigned char code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位码
unsigned int timer10ms=0;
unsigned int timer500ms=0;
unsigned char led_buf=0xff;
unsigned char ws_buf=0x00;
unsigned char SMG_buf[]={2,3,17,5,9,17,5,0};
unsigned char key_stat=0;
unsigned char key_value=0;
//---------------------------------------------------------------------------------
void Timer1Init() //1毫秒@12.000MHz
{
AUXR |= 0x40; //定时器时钟1T模式
TMOD &= 0x0F; //设置定时器模式
TL1 = 0x20; //设置定时初值
TH1 = 0xD1; //设置定时初值
TF1 = 0; //清除TF1标志
TR1 = 1; //定时器1开始计时
ET1=1;
EA=1;
}
//---------------------------------------------------------------------------------
void SelectHC573(unsigned char channel)
{
switch(channel)
{
case 4:
P2=(P2&0x1f)|0x80;
break;
case 5:
P2=(P2&0x1f)|0xa0;
break;
case 6:
P2=(P2&0x1f)|0xc0;
break;
case 7:
P2=(P2&0x1f)|0xe0;
break;
case 0:
P2=(P2&0x1f)|0x00;
break;
}
}
//---------------------------------------------------------------------------------
void led_output()
{
SelectHC573(4);
P0=led_buf;
SelectHC573(0);
}
//----------------------------------------------------------------------------------
void ws_output()
{
SelectHC573(5);
P0=ws_buf;
SelectHC573(0);
}
//----------------------------------------------------------------------------------
void SMG_output()
{
static unsigned char SMG_com=0;
SelectHC573(6);
P0=0x00;
SelectHC573(0);
SelectHC573(6);
P0=T_COM[SMG_com];
SelectHC573(0);
SelectHC573(7);
P0=~t_display[SMG_buf[SMG_com]];
SelectHC573(0);
if(++SMG_com>=8)
{
SMG_com=0;
}
}
//----------------------------------------------------------------------------------
void ServiceTimer1()interrupt 3
{
SMG_output();
timer10ms++;
timer500ms++;
}
//---------------------------------------------------------------------------------
void Scankey()
{
P3|=0x0f;
if(~P3 & 0x0f)
{
if(key_stat<255)
key_stat++;
if(P33==0)
key_value=4;
if(P32==0)
key_value=5;
if(P31==0)
key_value=6;
if(P30==0)
key_value=7;
}
else
{
key_stat=0;
key_value=0;
}
}