display.c

MP3播放器源代码, VS1003B

/** \file display.c
 * Functions for high level display.
 */

#include "display.h"
#include "lcd.h"
#include "board.h"
#include "string.h"

volatile xdata char displayPosition;
xdata char displayTitle[16];
xdata char displayText[DS_TEXTLENGTH+1];
xdata char displayLength;
xdata char displayStyle;
xdata char displayValue;



 


/** Reset display and print initial values */
char InitDisplay(char style, char *title, char *text, int value){

  LcdReset();

  //Init display title array
  for(displayPosition=0; displayPosition<8; displayPosition++){
    displayTitle[displayPosition]=' ';
  }
  displayTitle[8]=0; //ending zero
  strcpy(displayTitle, title);

  
  displayLength = strlen(text);
  //Init display text array
  //Clear display text array to spaces
  for(displayPosition=0; displayPosition<DS_TEXTLENGTH; displayPosition++){
    displayText[displayPosition]=' ';
  }
  displayText[DS_TEXTLENGTH] = 0; //ending zero
  strcpy(displayText, text);


  displayPosition = 0;
  displayStyle = style;
  displayValue = value;
  LcdPutString(displayTitle);
  LcdLocateLine2();
  LcdPutString(displayText);
  UpdateDisplay();

  return 0;
}


/** Paint display */
void UpdateDisplay(){

  signed char temp;

  LcdLocateHome();
  LcdPutChar(displayTitle[0]);
  LcdPutChar(displayTitle[1]);
  LcdPutChar(displayTitle[2]);
  LcdPutChar(displayTitle[3]);
  LcdPutChar(displayTitle[4]);
  LcdPutChar(displayTitle[5]);
  LcdPutChar(displayTitle[6]);
  LcdPutChar(displayTitle[7]);
  LcdLocateLine2();
  
  if (displayStyle == DS_STATIC){
    for (temp=0; temp<8; temp++){
      LcdPutChar(displayText[temp]);
    }
  }

  if (displayStyle == DS_TEXT){
    for (temp=displayPosition; temp<displayPosition + 8; temp++){
      if (temp<0){
	LcdPutChar(' ');
      }else{
	if (displayText[temp]){
     	  LcdPutChar(displayText[temp]);      
	}else{
	  LcdPutChar(' ');
	}
      }      
    }
  }

  if (displayStyle == DS_NUMERIC){
    LcdPutUInt(displayValue);
    LcdPutConstantString("        ");
  }

  if (displayStyle == DS_NO_YES){
    LcdPutConstantString(" No<>Yes");
  }

  if (displayStyle == DS_ARROWS){
    LcdPutConstantString(" <-   ->");
  }

  if (displayStyle == DS_PERCENTAGE){
    unsigned char majorp, minorp;
    if (displayValue>100){
      displayValue=100;
    }
    
    majorp = (displayValue-4) / 12;
    minorp = ((displayValue-4) % 12) >> 1;
    for (temp=0; temp<8; temp++){
      if (majorp>temp){
	LcdPutChar(4);
      }else{
	if (majorp<temp){
	  LcdPutChar(' ');
	}else{
	  switch(minorp){
	  case 0:
	    LcdPutChar(' ');
	    break;
	  case 1:
	    LcdPutChar(0);
	    break;
	  case 2:
	    LcdPutChar(1);
	    break;
	  case 3:
	    LcdPutChar(2);
	    break;
	  case 4:
	    LcdPutChar(3);
	    break;
	  case 5:
	    LcdPutChar(4);
	    break;
	  }//switch
	}
      }
    }         
    //LcdPutUInt(displayValue);
    //LcdPutConstantString("%       ");
  }

  if (displayStyle==DS_RAWTEXT){
    LcdPutChar(displayTitle[8]);
    LcdPutChar(displayTitle[9]);
    LcdPutChar(displayTitle[10]);
    LcdPutChar(displayTitle[11]);
    LcdPutChar(displayTitle[12]);
    LcdPutChar(displayTitle[13]);
    LcdPutChar(displayTitle[14]);
    LcdPutChar(displayTitle[15]);
  }


}