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標題: 麻煩大家幫我看下單片機程序,百思不得其解啊,哪里錯了? [打印本頁]

作者: wifen 時間: 2021-9-25 11:14
標題: 麻煩大家幫我看下單片機程序,百思不得其解啊,哪里錯了?
#include <reg52.h>

unsigned char ledbuf[] = {0xfc,0xc,0xda,0xf2,0x66,0xb6};
unsigned char ledchar[] = {    0xfc,0xc,0xda,0xf2,0x66,0xb6,0xbe,0xe0,
                              0xfe,0xf6,0xee,0x3e,0x9c,0x7a,0x9e,0x8e };
void ledscan();
void init_interrupt0(unsigned char ms);

unsigned char th0 = 0;
unsigned char tl0 = 0;

int main()
{
      EA = 1;
      init_interrupt0(2);

      while(1)
      {

      }

      return 0;
}

void init_interrupt0(unsigned char ms)
{
      unsigned long tmp ;
      tmp = 11059200 / 12;
      tmp = (ms * tmp) / 1000;
      tmp = 65536 - tmp;

      th0 = (unsigned char)(tmp>>8);
      tl0 = (unsigned char)tmp;

      TMOD &= 0xf0;
      TMOD |= 0x01;
      TH0 = th0;
      TL0 = tl0;
      TR0 = 1;
      ET0 = 1;

}
void ledscan()
{
      static unsigned char i =0;


      P0 = 0x00;
      P1 = (P1 & 0xf8) | i;

      P0 = ledbuf;

      if(i < 5)
      {
            i++;
      }
      else
      {
            i = 0;
      }
}

void interrupt_0() interrupt 1
{

      TH0 = th0;
      TL0 = tl0;

      ledscan();
}

程序的目的只是為了單純的動態刷新顯示幾個數，現在現象是，一開始顯示六位數，顯示一會后就自動跳變為只剩一位數顯示了。

作者: robinsonlin 時間: 2021-9-25 17:32
tmp = (ms * tmp) / 1000; 你這里除以1000是什么操作？如果要除以1000，你那個ms的值應該取10為單位的值吧？

作者: 188610329 時間: 2021-9-25 19:18
當搞不清什么地方出問題的時候，就不要搞太多虛頭巴腦的東西。所有東西最簡化，
TH0, TL0, 全用定值賦值后，測試一下有沒有問題。
也不要搞什么函數調用，尤其自己都不知道是什么，怎么用的函數。老老實實一行行代碼，自己也容易理解人家也容易理解。

void ledscan()
這個子函數，進去 i = 0; 你后面那些if 根本沒有意義。每次進去都是 i 都會變成 0 根本不會變。

作者: wulin 時間: 2021-9-25 21:22
本帖最后由 wulin 于 2021-9-25 21:24 編輯

注釋掉的語句都是錯誤的

復制代碼

作者: lkc8210 時間: 2021-9-25 22:11
i = 0: P1 = XXXXX000
i = 1: P1 = XXXXX001
i = 2: P1 = XXXXX010
i = 3: P1 = XXXXX011
i = 4: P1 = XXXXX100
i = 5: P1 = XXXXX101

作者: wfqxgw 時間: 2021-9-26 07:40

188610329 發表于 2021-9-25 19:18
當搞不清什么地方出問題的時候，就不要搞太多虛頭巴腦的東西。所有東西最簡化，
TH0, TL0, 全用定值賦值 ...

static 的變量只在第一次進入時定義。后面就會保存了的。這個變量沒問題的。

作者: wifen 時間: 2021-9-28 11:12
謝謝大家啊，搞定了，本來是寫一個秒表程序的，在這里測試數碼管的時候就出錯了，現在秒表改好了，我把程序發上來

作者: wifen 時間: 2021-9-28 11:13

188610329 發表于 2021-9-25 19:18
當搞不清什么地方出問題的時候，就不要搞太多虛頭巴腦的東西。所有東西最簡化，
TH0, TL0, 全用定值賦值 ...

這里沒有問題加了static

作者: wifen 時間: 2021-9-28 11:13
#include <reg52.h>

unsigned char ledbuf[6] = {0x00,0x00,0x00,0x00,0x00,0x00};
unsigned char ledchar[] = {    0xfc,0xc,0xda,0xf2,0x66,0xb6,0xbe,0xe0,
                              0xfe,0xf6,0xee,0x3e,0x9c,0x7a,0x9e,0x8e };

unsigned char key_sta[] = {1,1,1,1};

sbit key1 = P2^4;
sbit key2 = P2^5;
sbit key3 = P2^6;
sbit key4 = P2^7;

bit watch_running = 0;

void ledscan();
void init_interrupt0(unsigned int ms);
void keydriver();
void keyscan();
void count_time();
void watch_show();
void watch_close();
void watch_reset();

unsigned char t0_high = 0;
unsigned char t0_low = 0;
unsigned char decimal = 0;
unsigned int integer = 0;

int main()
{
EA = 1;
init_interrupt0(2);
P2 = 0xfe;

while(1)
{
watch_show();
keydriver();
}

return 0;
}

void init_interrupt0(unsigned int ms)
{
unsigned long tmp;
tmp = 11059200 / 12;
tmp = (ms * tmp) / 1000;
tmp = 65536 - tmp;

t0_high = (unsigned char)(tmp>>8);
t0_low = (unsigned char)tmp;

TMOD &= 0xf0;
TMOD |= 0x01;
TH0 = t0_high;
TL0 = t0_low;

TR0 = 1;
ET0 = 1;
}

void watch_show()
{
   unsigned char buf[4];
   signed char i = 0;

   ledbuf[5] = ledchar[decimal % 10];
   ledbuf[4] = ledchar[decimal / 10];

   buf[0] = integer % 10;
   buf[1] = (integer / 10) % 10;
   buf[2] = (integer / 100) %10;
   buf[3] = (integer / 1000) % 10;

   for(i = 3;i >= 1;i--)
   {
      if(buf[i] == 0)
{
ledbuf[3 - i] = 0x00;
}
else
{
break;
}
   }
   for(;i >= 0;i--)
   {
      ledbuf[3 - i] = ledchar[buf[i]];
   }

   ledbuf[3] |= 0x01;
}

void watch_close()
{
decimal = 0;
integer = 0;
watch_running = 0;
}

void watch_reset()
{
if( watch_running == 1)
{
   watch_running = 0;
}
else if( watch_running == 0)
{
   watch_running = 1;
}
}

void keydriver()
{
static unsigned char backup[] = {1,1,1,1};
unsigned char i = 0;

for(i = 0; i < 4;i++)
{
if(backup[i] != key_sta[i])
{
if(backup[i] == 0)
{
if(i == 0)
{
watch_close();
}
else if(i == 1)
{
watch_reset();
}
}
backup[i] = key_sta[i];
}
}
}

void ledscan()
{
static unsigned char i = 0;
P0 = 0x00;
P1 = (P1 & 0xf8) | i;

P0 = ledbuf[i];

if(i < 5)
{
i++;
}
else
{
i = 0;
}

}

void keyscan()
{
static unsigned char keybuf[] = {0xff,0xff,0xff,0xff};
unsigned char i = 0;

keybuf[0] = (keybuf[0] << 1) | key1;
keybuf[1] = (keybuf[1] << 1) | key2;
keybuf[2] = (keybuf[2] << 1) | key3;
keybuf[3] = (keybuf[3] << 1) | key4;

for(i = 0;i < 4;i++)
{
if(keybuf[i] == 0x00)
{
key_sta[i] = 0;
}
else if(keybuf[i] == 0xff)
{
key_sta[i] = 1;
}
}
}

void count_time()
{
if(watch_running)
{
decimal++;
if(decimal >= 100)
{
decimal = 0;
integer++;
if(integer >= 10000)
{
integer = 0;
}
}
}
}

void interrupt0() interrupt 1
{
static unsigned char ms10 = 0;

TH0 = t0_high;
TL0 = t0_low;

ledscan();
keyscan();

ms10++;
if(ms10 >= 5)
{
count_time();
ms10 = 0;
}
}

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