VLSI Solution Oy Evaluation MP3 Player Source Code Documentation

lcd.c

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#include "board.h"
#include "lcd.h"
#include "lcdfonts.c"

code const unsigned char lcd_hexchars[17] = "0123456789abcdef";


void LcdPutChar(char c) {
  WaitOutDelay();
  LCD_RS = LCD_DATA_MODE;
  LCD_ENABLE = 1; /* Rising edge */
  LCD_DATABUS = c;
  LCD_ENABLE = 1; /* Keep high...*/
  LCD_ENABLE = 0; /* Falling edge */
  InitiateDelay(44);
}




void LcdPutCommand(char cmd){
  WaitOutDelay();
  LCD_RS = LCD_COMMAND_MODE;
  LCD_ENABLE = 1; /* Rising edge */
  LCD_DATABUS = cmd;
  LCD_ENABLE = 0; /* Falling edge */
}



void LcdSelectFont(ROM_CHAR_PTR font){
  static ROM_CHAR_PTR loadedFont = 0;
  if (loadedFont != font){
    loadedFont=font;
    
    LcdLocateCG();
    LcdPutConstantString(font);  
    LcdLocateHome();
   
  }
}

void LcdReset(){


  LCD_ENABLE = 0;
  InitiateDelay(0); /* Initialize the delay system */

  LcdPutCommand(56); /* 8 data bits, 2 lines */
  InitiateDelay(39);

  WaitOutDelay();
  LcdPutCommand(56); /* Command 2 times "just in case" */
  InitiateDelay(39);

  WaitOutDelay();
  LcdPutCommand(12); /* Panel on, no cursor */
  InitiateDelay(39);

  WaitOutDelay();
  LcdPutCommand(1);  /* Clear screen */
  InitiateDelay(1530); /* Start a 1.53 ms delay */

  LcdSelectFont(lcdFont_barchars);

}



void LcdPutString (char *str) {
  while (*str) {
    LcdPutChar (*str++);
  }
}



void LcdPutConstantString(char code *str){
  while (*str)
    {
      LcdPutChar (*str++);
    }
}



void LcdFadeIn(){
  unsigned char c,d;
  for (c=0; c<254; c++){
    for (d=252; d; d-=2){
      if (d>c){
        LcdPutCommand (8);
        InitiateDelay(40);
      }else{
        LcdPutCommand (12);
        InitiateDelay(40);
      }
    }
  }
  LcdPutCommand(12);
  InitiateDelay(40);
}

void LcdFadeOut(){
  unsigned char c,d;
  for (c=0; c<254; c++){
    for (d=252; d; d-=2){
      if (d<c){
        LcdPutCommand (8);
        InitiateDelay(40);
      }else{
        LcdPutCommand (12);
        InitiateDelay(40);
      }
    }
  }
  LcdPutCommand(8);
  InitiateDelay(40);
}


void LcdSplashScreen(){
    
  LcdReset();
 
  LcdSelectFont(lcdFont_vlsichars);
  
  LcdLocateHome();
  
  LcdPutChar(0);
  LcdPutConstantString("\1\2\3 Sol");
  LcdLocateLine2();
  LcdPutConstantString("ution Oy");

 
  LcdFadeIn();
  LcdFadeOut();
 
}


void LcdPutHex16 (unsigned int value){
  LcdPutChar(lcd_hexchars[value>>12]);
  LcdPutChar(lcd_hexchars[(value>>8)&0xf]);
  LcdPutChar(lcd_hexchars[(value>>4)&0xf]);
  LcdPutChar(lcd_hexchars[(value)&0xf]);
}


void LcdPutHex8 (unsigned char value){

  LcdPutChar(lcd_hexchars[(value>>4)&0xf]);
  LcdPutChar(lcd_hexchars[(value)&0xf]);
}


unsigned char LcdPrintGenericResult (unsigned char errorlevel){
  if (!errorlevel){        
    LcdPutConstantString ("OK      ");
  }else{
    LcdPutConstantString ("Error ");
    LcdPutChar(lcd_hexchars[(errorlevel>>4)&0xf]);
    LcdPutChar(lcd_hexchars[(errorlevel)&0xf]);
    ConsoleWrite ("\rSystem error ");
    ConsolePutHex8 (errorlevel);
    ConsoleWrite (": \"");

    switch (errorlevel){
    case 0x01: ConsoleWrite ("No storage"); break;
    case 0x02: ConsoleWrite ("Storage powerup"); break;
    case 0x03: ConsoleWrite ("Storage init"); break;
    case 0x04: ConsoleWrite ("No storage ID"); break;
    case 0x05: ConsoleWrite ("Datablock header"); break;
    case 0x06: ConsoleWrite ("Storage Data reply failed"); break;
    case 0x07: ConsoleWrite ("Generic Storage Command"); break;
    case 0x08: ConsoleWrite ("Sector 0 not in recognized format"); break;
    case 0x09: ConsoleWrite ("No active partition"); break;
    case 0x0a: ConsoleWrite ("Filesystem load"); break;
    case 0x0b: ConsoleWrite ("No root directory"); break;
    case 0x0c: ConsoleWrite ("File not found"); break;

    };
    ConsoleWrite("\" failure.\r");
    

    Delay(500);
  }
  return errorlevel;
}


void LcdPutUInt(unsigned long value){
  xdata unsigned char valueString[10];
  char c;
  for (c=0; c<10; c++){
    valueString[c]=value % 10;
    value = value / 10;
  }
  c=9;
  while ((valueString[c]==0) && (c!=0))
    c--;
  for (;c!=0;c--)
    LcdPutChar('0'+valueString[c]);
  LcdPutChar('0'+valueString[0]);

}

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All software copyright 2000-2004 VLSI Solution OY. Redistribution of these software modules are limited to promotional use only and only with the VS1011 / VS1002 / VS1003 MP3-Evakit evaluation boards. Free or commercial use of these software modules in MP3 players is ok if the product includes MP3 decoder chip(s) from VLSI. You can request the complete (compilable) package from mp3@vlsi.fi