lcd.c

MP3 Player Source Code

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

/**\file lcd.c
 * LCD function implementations.
 * Required modules: board
 */ 

/** hexadecimal character set */
code const unsigned char lcd_hexchars[17] = "0123456789abcdef";


/** Low level: Send one data character to LCD.
 * \param c Octet to be sent to LCD
 */
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);
}




/** Low level: Send one command octet to LCD.
 * \param cmd Command octet to be sent to LCD
 */
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();
   
  }
}

/** Low level: Reset LCD */
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);

}



/** Low level: Send a zero-terminated string of bytes to lcd 
 * from buffer in any memory. 
 * <b>Example:</b> LcdPutString (s);
 * \param *str pointer to a zero-terminated string in idata segment 
 * \warning Do not call for const type strings in the ROM! 
*/
void LcdPutString (char *str) {
  while (*str) {
    LcdPutChar (*str++);
  }
}



/** Low level: Send a zero-terminated string of bytes to lcd 
 * from buffer in ROM. 
 * <b>Example:</b> LcdPutConstantString ("Hello!");
 * \param *str pointer to a zero-terminated string in code ROM.
*/
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);
}


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

 
  LcdFadeIn();
  LcdFadeOut();
 
}


/** Print a 16-bit hex value on LCD */
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]);
}


/** Print an 8-bit hex value on LCD */
void LcdPutHex8 (unsigned char value){

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


/** Print OK or Error (hex8) on LCD */
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;
}


/** Print a 16-bit unsigned integer value on LCD */
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]);

}