ledtest.c

LED扫描驱动程序

/*********************cmdexplain***********************************
//cmd
- 0xF0  全屏清屏
- 0xF1  全屏闪烁1 
- 0xF2  全屏闪烁2 
- 0xF3  全屏闪烁3 
- 0xF4  全屏关屏
- 0xF5  全屏关闭闪烁

//type+data
- 0x0f  正常显示X
- 0x0e  闪烁1显示X
- 0x0d  闪烁2显示X
- 0x0c  闪烁3显示X

*******************************************************************/

#include<reg52.h>
#include<absacc.h>

sfr   AXUR      = 0X8E;

#define U1                  bit
#define U8                  unsigned char
#define U16                 unsigned int
#define U32                 unsigned long

#ifndef BIT
#define BIT(x)              (1 << (x))
#endif

sbit     irqport  = P3^2;
sbit     busyport = P3^3;
sbit     typeport = P3^5;


#define LEDCOMPORT        P1

volatile U8 data addrbuf = 0;
volatile U8 data cmdbuf  = 0;
U1  data FlashFlag_3     = 0;
U1  data FlashFlag_5     = 0;
U1  data FlashFlag_7     = 0;
U16 data TimeCount_3     = 0;
U16 data TimeCount_5     = 0;
U16 data TimeCount_7     = 0;

U8 pdata light_1 _at_ 120 ;
U8 pdata light_2 _at_ 121 ;
U8 pdata light_3 _at_ 122 ;
U8  data led_code[16] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f,0x00,0x01,0x02,0x04,0x1e,0x40};//0,1,2,3,4,5,6,7,8,9,灭,A,b,C,d,-
U16 data row_code[7]  = { 0x1000, 0x2000, 0x3000, 0x4000, 0x5000, 0x6000, 0x7000};

void test(void)
{
U8 i = 0;
   for(i = 0; i<128;i++)
     {
       PBYTE[i] = 0x3f;
     }
}
void scan_led(void)
{
U8 i, j;
U8 temp;
U8 temp1;
U8 temp2;
     
         for(i = 0; i < 16; i++)
         {
           XBYTE[0X8000] = 0; XBYTE[0X9000] = 0; 
           for(j = 0; j < 7; j++) 
		         {
             temp2 = j*16 + i;
             temp = PBYTE[temp2]; 
             if      (temp2 == 93) temp1 =  temp;
             else if (temp2 == 94) temp1 =  temp;
             else if (temp2 == 95) temp1 =  temp;
             else
             {
			            switch(temp&0xf0)
			            {
                 case 0xf0:
                      temp &= 0x0f;
                      temp1 = led_code[temp];
                 break;
                 case 0xe0:
                      if(FlashFlag_3) temp = 0x0a;
                      else temp &= 0x0f; 
                      temp1 = led_code[temp];
                 break;
                 case 0xd0:
                      if(FlashFlag_5) temp = 0x0a;
                      else temp &= 0x0f;
                      temp1 = led_code[temp];
                 break;
                 case 0xc0:
                      if(FlashFlag_7) temp = 0x0a; 
                      else temp &= 0x0f;
                      temp1 = led_code[temp];
                 break;
				           }
             }
             XBYTE[row_code[j]] = temp1; 
			        }
		         if (i < 8)  XBYTE[0X8000] = BIT(i);
           else        XBYTE[0X9000] = BIT(i - 8); 
           XBYTE[0XA000] = light_1;
           XBYTE[0XB000] = light_2;
           XBYTE[0XC000] = light_3;
           if(++TimeCount_3 >= 1000) {FlashFlag_3 = ~FlashFlag_3; TimeCount_3 = 0;}
           if(++TimeCount_5 >= 2000) {FlashFlag_5 = ~FlashFlag_5; TimeCount_5 = 0;}
           if(++TimeCount_7 >= 3000) {FlashFlag_7 = ~FlashFlag_7; TimeCount_7 = 0;}
         }
}

void scan_cmd(void)
{
U8 i, temp;

         if (cmdbuf) 
         {
           switch(cmdbuf)
           {
             case 0xf0 : for(i = 0; i < 128; i++) PBYTE[i] = 0X0;   break;
             case 0xf1 : for(i = 0; i < 128; i++) {temp = PBYTE[i]; temp &= 0x0f; temp |= 0xe0; PBYTE[i] = temp;} break;
             case 0xf2 : for(i = 0; i < 128; i++) {temp = PBYTE[i]; temp &= 0x0f; temp |= 0xd0; PBYTE[i] = temp;} break;
             case 0xf3 : for(i = 0; i < 128; i++) {temp = PBYTE[i]; temp &= 0x0f; temp |= 0xc0; PBYTE[i] = temp;} break;
             case 0xf4 : for(i = 0; i < 128; i++) PBYTE[i] = 0x0a;  break;
             case 0xf5 : for(i = 0; i < 128; i++) {temp = PBYTE[i]; temp &= 0x0f; PBYTE[i] = temp;} break;
             case 0xe0 : light_1 = 0xff; light_2 = 0xff; light_3 = 0xff; break;
             case 0xe1 : light_1 = 0x0; light_2 = 0x0; light_3 = 0x0; break;
           }
           cmdbuf = 0;
         }
}

void InitSys(void)
{
U8 i;

          AXUR = 0x01; 
          P1 = 0xff; P2 = 0xff; P3 = 0xff;
          EX0 = 1; IT0 = 1; 
          busyport = 0;
          for(i = 0; i < 128; i++)  PBYTE[i] = 0xfa; 
          PBYTE[93] = 0x0; PBYTE[94] = 0x0; PBYTE[95] = 0x0;
          light_1 = 0x0; light_2 = 0x0; light_3 = 0x0;
          while(!irqport);
          busyport = 1; IE0 = 0; EA = 1;
}

void main(void)
{

        InitSys();
		test();
        while(1)
        {
          scan_led();
          scan_cmd();
        }
}