lcd_drv.c

8051实现的MP3播放程序,大家可以一起学习.

/*C**************************************************************************
* NAME:         lcd_drv.c
*----------------------------------------------------------------------------
* Copyright (c) 2004 Toplow.
*----------------------------------------------------------------------------
* RELEASE:      snd1c-refd-nf-4_0_3      
* REVISION:     1.0     
*----------------------------------------------------------------------------
* PURPOSE: 
* This file contains the LCD driver routines
*
* NOTES:

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

/*_____ I N C L U D E S ____________________________________________________*/

#include "config.h"                          /* system configuration */
#include "lib_mcu\c51_drv.h"                /* c51 driver definition */
#include "lcd_drv.h"                        /* usb driver definition */
#include "modules\song\song_drv.h"
#include "modules\unicode\unicode.h"
//#include "lib_mcu\serial\serial.h"
/*_____ M A C R O S ________________________________________________________*/

extern  char    pdata *lfn_name;
extern  Uint16  song_name[11];
extern  uchar   song_name_count;
extern  bit bdata song_name_style;
extern  Byte    song_sound;
extern  Byte    mp3_volume;

/*_____ D E F I N I T I O N ________________________________________________*/

void putchar(a)  
{
   LCDRS = 1; 
   LCDRW = 0;
   LCDEN = 1; 
   LCDPORT = a; 
   LCDEN = 0; 
}


void putcomm(a) 
{ 
   LCDRS = 0; 
   LCDRW = 0; 
   LCDEN = 1; 
   LCDPORT = a; 
   LCDEN = 0; 
}



void ReadBusy(void)
{
   uchar busy;
    
   do{
        LCDPORT = 0xff;
        LCDRS = 0;
        LCDRW = 1;
        LCDEN = 1;
        busy = LCDPORT;
        LCDEN= 0;
	 } while(busy & 0x80);
}




void printch(uchar pos, uchar *ptr)
{
    uchar j;

    while (*ptr != ' ')
    {
        ReadBusy(); 
        putcomm(pos);
        for (j=0; j<2; j++)
	    {
           ReadBusy();
	       putchar(*ptr ++);
		}
	    pos ++;
    }
}

void lcdcls (uchar pos)
{
  uchar i;

  for (i = 0; i < 8; i++)
  {
     ReadBusy(); 
     putcomm(pos + i);
     ReadBusy();
	 putchar(' ');
     ReadBusy();
	 putchar(' ');
  }
}
     
   

void lcd_ini(void)
{
   putcomm(0x30);
   putcomm(0x04);
   ReadBusy();
   putcomm(0x0c);
   ReadBusy();
   putcomm(0x01);
   ReadBusy();
   putcomm(0x02);
}




void print_file_name()
{
 uchar n,y,x;
 uchar find_code = 0;
 song_name_style = 0;
 for (n = 0; n < 8; n++)
   {
    for (y = 0; y < 72; y++)
	   {
	    for (x = 0; x < 96; x++)
	      {	 
	       if (song_name[n] == Unicode[y][x])
		       {
		  	    song_name[n] =(Uint16)((0xb0+y)<<8)+(0xa0+x);
                find_code = 1;
				song_name_style = 1; //1-CHINESE NAME ,0-ENGLISH NAME
                break;
			    }
		   }
		if (find_code)
		   {
		    find_code = 0; 
		    break;
		   }
		}
	}


  for (n = 0; n < 8; n++)
     {  
       ReadBusy();           
       putcomm(0x80+n);

     if (song_name_style)
	     {
          ReadBusy();
	      putchar((Byte)(song_name[n]>>8));
    	  ReadBusy();
	      putchar((Byte)(song_name[n]));
		 }

	  else
	     { 
		  ReadBusy();
	      putchar(*lfn_name++);
    	  ReadBusy();
	      putchar(*lfn_name++);
		 }
	 }

}



void print_sound_level()
{
 switch (song_sound)
  {
   case SND_VOLUME:
          { 
		   printch(0x93,"音量  ");
		   ReadBusy(); 
           putcomm(0x95);
		   ReadBusy();
           putchar(0x30+(Byte)(song_get_level()/10));
           ReadBusy();
           putchar(0x30+song_get_level()%10);
		   break;
		   }

   case SND_BASS:
          {
		   printch(0x93,"低音  ");
		   ReadBusy(); 
           putcomm(0x95);
		   ReadBusy();
           putchar(0x30+(Byte)(song_get_level()/10));
           ReadBusy();
           putchar(0x30+song_get_level()%10);
           printch(0x96,"关  ");
		   break;
		   }

   case SND_MEDIUM:
          {
		   printch(0x93,"中音  ");
		   ReadBusy(); 
           putcomm(0x95);
		   ReadBusy();
           putchar(0x30+(Byte)(song_get_level()/10));
           ReadBusy();
           putchar(0x30+song_get_level()%10);
		   break;
		   }

   case SND_TREBLE:
          {
		   printch(0x93,"高音  ");
		   ReadBusy(); 
           putcomm(0x95);
		   ReadBusy();
           putchar(0x30+(Byte)(song_get_level()/10));
           ReadBusy();
           putchar(0x30+song_get_level()%10);
		   break;
		   }

   case SND_NONDIS:
          {
		  printch(0x93,"选曲  ");
          break;
		  }

   /*case SND_BBOOST:
	      {
		   if (song_get_level())
		      printch(0x96,"BST  ");
		   else printch(0x96,"     ");
		   break;
		   }*/

   default : break;
   }
}


void disp_clock_reset()
{;}

void disp_clock_start()
{;}

void print_state_play()
{ 
 printch(0x90,"播放  ");
}

void disp_clock_stop()
{;}

void print_state_pause()
{
 printch(0x90,"暂停  ");
}

void disp_name_stop()
{;}

void disp_end_of_play()
{;}

void print_state_error()
{
 printch(0x90,"错误  ");
}


void print_repeat(bit song_repeat)
{
 if(song_repeat)
    printch(0x87,"R  ");
 else
    printch(0x87,"   ");
 }