disp.c

开发工具:keil7 主要IC：at89c51sdnd1(atmel) 说明：mp3播放器详细设计方案

}


/*F**************************************************************************
* NAME: print_voice_vol
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print the voice volume
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_voice_vol (char volume)
{
  lcd_set_cur(POS_SOUND_LVL);
  lcd_putchar(volume + '0');
}


/*F**************************************************************************
* NAME: print_time
*----------------------------------------------------------------------------
* PARAMS:
*   - min: minute to display
*   - sec: second to display
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print time on the LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_time (Byte min, Byte sec)
{
  lcd_set_cur(POS_TIME);
  print_decim(min, TRUE);
  lcd_putchar(':');
  print_decim(sec, FALSE);
}


/*F**************************************************************************
* NAME: print_sec
*----------------------------------------------------------------------------
* PARAMS:
*   - sec: second to display
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print second of time on the LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_sec (Byte sec)
{
  lcd_set_cur(POS_SECOND);
  print_decim(sec, FALSE);
}


/*F**************************************************************************
* NAME: print_min
*----------------------------------------------------------------------------
* PARAMS:
*   - min: minute to display
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print minute of time on the LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_min (Byte min)
{
  lcd_set_cur(POS_MINUTE);
  print_decim(min, TRUE);
}


/*F**************************************************************************
* NAME: print_kbd_lock
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print the lock status
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_kbd_lock (void)
{
  if (gl_kbd_lock)
  {
    lcd_cgram(CGRAM_LOCK, cgram_lock);      /* init lock icon to locked */
  }
  else
  {
    lcd_cgram(CGRAM_LOCK, cgram_blank);     /* init lock icon to locked */
  }
}


/*F**************************************************************************
* NAME: print_mem
*----------------------------------------------------------------------------
* PARAMS:
*   - mem_type  SYMB_DF
*               SYMB_MMC1
*               SYMB_MMC2
*               SYMB_NO_MEM
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print the memory type on the LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_mem (Byte mem_type)
{
  switch (mem_type)
  {
    case SYMB_DF:
      lcd_cgram(CGRAM_MEM, cgram_df);
      break;

    case SYMB_MMC1:
      lcd_cgram(CGRAM_MEM, cgram_mmc1);
      break;

    case SYMB_MMC2:
      lcd_cgram(CGRAM_MEM, cgram_mmc2);
      break;

    default:
      lcd_cgram(CGRAM_MEM, cgram_blank);
      break;
  }
}


/*F**************************************************************************
* NAME: print_repeat
*----------------------------------------------------------------------------
* PARAMS:
*   status: - TRUE:  play is repeated after last song
*           - FALSE: play is stopped after last song
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print repeat status on the LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_repeat (bit status)
{
  lcd_set_cur(POS_REPEAT);
  if (status == TRUE)
  {
    lcd_putchar(CGRAM_REPEAT / CGRAM_CHAR_SIZE);
  }
  else
  {
    lcd_putchar(' ');
  }
}


/*F*****************************************************************************
* NAME: print_file_name
*-------------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print to lcd the current file name
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_file_name()
{
  switch(File_type())                       /* print file type icon */
  {
    case FILE_DIR:
      lcd_cgram(CGRAM_TYPE, cgram_dir);     /* select directory icon */
      break;

    case FILE_MP3:
      lcd_cgram(CGRAM_TYPE, cgram_mp3);     /* select song icon */
      break;

    case FILE_WAV:
      lcd_cgram(CGRAM_TYPE, cgram_wav);     /* select voice icon */
      break;

    default:
      lcd_cgram(CGRAM_TYPE, cgram_blank);   /* select voice icon */
      break;
  }
  disp_name_start();                        /* start name display */
}


/*F*****************************************************************************
* NAME: print_file_type
*-------------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print to lcd the current file type
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_file_type()
{
  switch(File_type())                       /* print file type icon */
  {
    case FILE_DIR:
      lcd_cgram(CGRAM_TYPE, cgram_dir);     /* select directory icon */
      break;

    case FILE_MP3:
      lcd_cgram(CGRAM_TYPE, cgram_mp3);     /* select song icon */
      break;

    case FILE_WAV:
      lcd_cgram(CGRAM_TYPE, cgram_wav);     /* select voice icon */
      break;

    default:
      lcd_cgram(CGRAM_TYPE, cgram_blank);   /* select voice icon */
      break;
  }
}


/*F*****************************************************************************
* NAME: print_name
*-------------------------------------------------------------------------------
* PARAMS:
*   string: pointer on char string
* return:
*   TRUE:  at the end of the string
*   FALSE: in the middle of the string
*----------------------------------------------------------------------------
* PURPOSE:
*   Print 14 characters of the file name
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit print_name (char pdata *string)
{
  lcd_set_cur(POS_FILE);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  lcd_putchar(*string++);
  return (*string == '\0');
}


/*F**************************************************************************
* NAME: print_screen
*----------------------------------------------------------------------------
* PARAMS:
*   screen: string in code space to print on LCD
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print a screen string on LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_screen (char code *screen)
{
  lcd_set_cur(POS_HOME);
  while (*screen != '\0')
  {
    lcd_putchar(*screen++);
  }
}


/*F**************************************************************************
* NAME: print_string
*----------------------------------------------------------------------------
* PARAMS:
*   string: string in code space to print on LCD
* return:
*----------------------------------------------------------------------------
* PURPOSE:
*   Print a string on LCD
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_string (char code *string)
{
  while (*string != '\0')
  {
    lcd_putchar(*string++);
  }
}


/*F****************************************************************************
* NAME: print_decim
*------------------------------------------------------------------------------
* PARAMS:
*   b:     number to print
*   space: TRUE: print ' 0', FALSE: print '00'
* return:
*------------------------------------------------------------------------------
* PURPOSE:
*   Print a 2 digits number on LCD '00-99' or ' 0-99'
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void print_decim (Byte b, bit space)
{
  if (b < 10)
  {
    if (space)
      lcd_putchar(' ');
    else
      lcd_putchar('0');
    lcd_putchar(b +'0');
  }
  else
  {
    lcd_putchar(b / 10 +'0');
    lcd_putchar(b % 10 +'0');
  }
}