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標題: 這個單片機程序怎么樣能加快計數到20或者10? [打印本頁]

作者: zxcvgfd 時間: 2020-11-4 10:58
標題: 這個單片機程序怎么樣能加快計數到20或者10?
#include <REGX51.H>
#include <math.H>

#define FOSC 12000000L
#define T1MS (65536-FOSC/12/1000*10) //10ms timer calculation method in 12T mode
#define PI 3.1415926
#define On       0
#define Off       1

void Timer0_Init(void);
void LEDBlink(void);
unsigned int KeyScan(void);
#define LEDPORT P1
#define dx       (PI*2/100)
#define PWM_PERIOD       100
#define LEDNUM       8

sbit LED0 = P1^0;
sbit LED1 = P1^1;
sbit LED2 = P1^2;
sbit LED3 = P1^3;
sbit LED4 = P1^4;
sbit LED5 = P1^5;
sbit LED6 = P1^6;
sbit LED7 = P1^7;

sbit KEY1 = P2^0;
sbit KEY2 = P2^1;
unsigned char led_tab[8] = {
0XFE,0XFD,0XFB,0XF7,0XEF,0XDF,0XBF,0X7F};

unsigned int TimeTikTok = 0;
unsigned int TimeBase = 0;
void main(void)
{
      unsigned int i = 0;
      unsigned int keycount = 0;
      double x = 0.0;
      Timer0_Init();
      while(1)
      {
                     if (TimeBase) 只有為1的時候會繼續
                     {
                              TimeBase = 0;
                              TimeTikTok ++;if(TimeTikTok > 60000) TimeTikTok = 0;

                              if(! (TimeTikTok % 10)) //100ms    //怎么樣能夠加快計數到10
                              {
                                             //LEDBlink();
                              }

                              if(! (TimeTikTok % 20)) //200ms //怎么樣能加快計數到20
                              {
                                             if(KeyScan() == 1)
                                                      LED0 ^=1 ;
                                             if(KeyScan() == 2)
                                                      LED1 ^=1 ;
                              }

                     }
            }

}

void Timer0_Init(void)
{
TMOD = 0x01;                   //set timer0 as mode1 (16-bit)
TL0 = T1MS;                   //initial timer0 low byte
TH0 = T1MS >> 8;             //initial timer0 high byte
TR0 = 1;                      //timer0 start running
ET0 = 1;                      //enable timer0 interrupt
EA = 1;                      //open global interrupt switch
}
      //LEDPORT |= (0X01<<LEDX);
//unsigned int LEDX,unsigned int delay
void LEDBlink(void)
{
      static int statue = 0;

      switch (statue)
      {
            case 0:       LEDPORT = 0xFE;             statue = 1;             break;
            case 1:       LEDPORT = 0XFD;             statue = 2;       break;
            case 2:       LEDPORT = 0XFB;             statue = 3;             break;
            case 3:       LEDPORT = 0XF7;             statue = 4;       break;
            case 4:       LEDPORT = 0XEF;             statue = 5;             break;
            case 5:       LEDPORT = 0XDF;             statue = 6;       break;
            case 6:       LEDPORT = 0XBF;             statue = 7;             break;
            case 7:       LEDPORT = 0X7F;             statue = 0;       break;
      }
}

unsigned int KeyScan(void)
{
            static int statue = 0;
            unsigned int keyVal = 0;
            switch (statue)
            {
                              case 0: statue = 1;             break;
                        case 1:
                              {
                                             if(!KEY1)       等價于KEY1=0                                                       keyVal = 1;
                                             if(!KEY2)                                                             keyVal = 2;
                                             if((!KEY1) && (!KEY2))       keyVal = 3;
                                             statue = 2;       break;
                              }
                              case 2:       statue = 0;             break;
            }
            return keyVal;
}
/* Timer0 interrupt routine */
//unsigned int PWM_CHANGE_cnt = 0;
void TM0_isr() interrupt 1
{

TL0 = T1MS;                   //reload timer0 low byte
TH0 = T1MS >> 8;             //reload timer0 high byte
            TimeBase = 1;

}

作者: 心有浮生 時間: 2020-11-4 14:29
你把進定時器中斷時間改小一點不就好了

作者: 奮斗的小白熊 時間: 2020-11-4 14:42
減少你進中斷的時間 T1MS (65536-FOSC/12/1000*10)

作者: 權威人物 時間: 2020-11-4 16:51
你這是別人寫的吧！
void main(void)
{
      unsigned int i = 0;
      unsigned int keycount = 0;
      double x = 0.0;
      Timer0_Init();
      while(1)
      {
                     if (TimeBase) 只有為1的時候會繼續
                     {
                              TimeBase = 0;

                              TimeTikTok ++;if(TimeTikTok > 60000) TimeTikTok = 0;

                           // if(! (TimeTikTok % 10)) //100ms    //怎么樣能夠加快計數到10
                              //{
                                             //直接寫你的10ms的程序就好了，看程序應該是定時10ms的
                                             //LEDBlink();
                           // }

                              if(! (TimeTikTok % 2)) //20ms //20個計數為200ms那么2個計數即為20ms
                              {
                                             if(KeyScan() == 1)
                                                      LED0 ^=1 ;
                                             if(KeyScan() == 2)
                                                      LED1 ^=1 ;
                              }

                     }
            }

}

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