VLSI Solution Oy VLSI Solution Oy Evaluation MP3 Player Source Code Documentation

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lcd.c File Reference

LCD function implementations. More...

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

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Functions

void LcdPutChar (char c)
 Low level: Send one data character to LCD.

void LcdPutCommand (char cmd)
 Low level: Send one command octet to LCD.

void LcdSelectFont (ROM_CHAR_PTR font)
void LcdReset ()
 Low level: Reset LCD.

void LcdPutString (char *str)
 Low level: Send a zero-terminated string of bytes to lcd from buffer in any memory.

void LcdPutConstantString (char code *str)
 Low level: Send a zero-terminated string of bytes to lcd from buffer in ROM.

void LcdFadeIn ()
void LcdFadeOut ()
void LcdSplashScreen ()
 Splash screen.

void LcdPutHex16 (unsigned int value)
 Print a 16-bit hex value on LCD.

void LcdPutHex8 (unsigned char value)
 Print an 8-bit hex value on LCD.

unsigned char LcdPrintGenericResult (unsigned char errorlevel)
 Print OK or Error (hex8) on LCD.

void LcdPutUInt (unsigned long value)
 Print a 16-bit unsigned integer value on LCD.


Variables

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

Detailed Description

LCD function implementations.

Required modules: board

Definition in file lcd.c.

Function Documentation

void LcdFadeIn (   ) 
 

Definition at line 111 of file lcd.c.

References InitiateDelay, and LcdPutCommand().

Referenced by LcdSplashScreen(). 

00111                 {
00112   unsigned char c,d;
00113   for (c=0; c<254; c++){
00114     for (d=252; d; d-=2){
00115       if (d>c){
00116         LcdPutCommand (8);
00117         InitiateDelay(40);
00118       }else{
00119         LcdPutCommand (12);
00120         InitiateDelay(40);
00121       }
00122     }
00123   }
00124   LcdPutCommand(12);
00125   InitiateDelay(40);
00126 }

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void LcdFadeOut (   ) 
 

Definition at line 128 of file lcd.c.

References InitiateDelay, and LcdPutCommand().

Referenced by LcdSplashScreen(). 

00128                  {
00129   unsigned char c,d;
00130   for (c=0; c<254; c++){
00131     for (d=252; d; d-=2){
00132       if (d<c){
00133         LcdPutCommand (8);
00134         InitiateDelay(40);
00135       }else{
00136         LcdPutCommand (12);
00137         InitiateDelay(40);
00138       }
00139     }
00140   }
00141   LcdPutCommand(8);
00142   InitiateDelay(40);
00143 }

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unsigned char LcdPrintGenericResult (  unsigned char  errorlevel  ) 
 

Print OK or Error (hex8) on LCD.

Definition at line 185 of file lcd.c.

References Delay(), lcd_hexchars, LcdPutChar(), and LcdPutConstantString().

Referenced by main(). 

00185                                                               {
00186   if (!errorlevel){        
00187     LcdPutConstantString ("OK      ");
00188   }else{
00189     LcdPutConstantString ("Error ");
00190     LcdPutChar(lcd_hexchars[(errorlevel>>4)&0xf]);
00191     LcdPutChar(lcd_hexchars[(errorlevel)&0xf]);
00192     ConsoleWrite ("\rSystem error ");
00193     ConsolePutHex8 (errorlevel);
00194     ConsoleWrite (": \"");
00195 
00196     switch (errorlevel){
00197     case 0x01: ConsoleWrite ("No storage"); break;
00198     case 0x02: ConsoleWrite ("Storage powerup"); break;
00199     case 0x03: ConsoleWrite ("Storage init"); break;
00200     case 0x04: ConsoleWrite ("No storage ID"); break;
00201     case 0x05: ConsoleWrite ("Datablock header"); break;
00202     case 0x06: ConsoleWrite ("Storage Data reply failed"); break;
00203     case 0x07: ConsoleWrite ("Generic Storage Command"); break;
00204     case 0x08: ConsoleWrite ("Sector 0 not in recognized format"); break;
00205     case 0x09: ConsoleWrite ("No active partition"); break;
00206     case 0x0a: ConsoleWrite ("Filesystem load"); break;
00207     case 0x0b: ConsoleWrite ("No root directory"); break;
00208     case 0x0c: ConsoleWrite ("File not found"); break;
00209 
00210     };
00211     ConsoleWrite("\" failure.\r");
00212     
00213 
00214     Delay(500);
00215   }
00216   return errorlevel;
00217 }

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void LcdPutChar (  char  c  ) 
 

Low level: Send one data character to LCD.

Parameters:
c Octet to be sent to LCD

Definition at line 17 of file lcd.c.

References InitiateDelay, LCD_DATA_MODE, LCD_DATABUS, LCD_ENABLE, LCD_RS, and WaitOutDelay.

Referenced by LcdPrintGenericResult(), LcdPutConstantString(), LcdPutHex16(), LcdPutHex8(), LcdPutString(), LcdPutUInt(), LcdSplashScreen(), main(), and UpdateDisplay(). 

00017                         {
00018   WaitOutDelay();
00019   LCD_RS = LCD_DATA_MODE;
00020   LCD_ENABLE = 1; /* Rising edge */
00021   LCD_DATABUS = c;
00022   LCD_ENABLE = 1; /* Keep high...*/
00023   LCD_ENABLE = 0; /* Falling edge */
00024   InitiateDelay(44);
00025 }

void LcdPutCommand (  char  cmd  ) 
 

Low level: Send one command octet to LCD.

Parameters:
cmd Command octet to be sent to LCD

Definition at line 33 of file lcd.c.

References LCD_COMMAND_MODE, LCD_DATABUS, LCD_ENABLE, LCD_RS, and WaitOutDelay.

Referenced by LcdFadeIn(), LcdFadeOut(), and LcdReset(). 

00033                             {
00034   WaitOutDelay();
00035   LCD_RS = LCD_COMMAND_MODE;
00036   LCD_ENABLE = 1; /* Rising edge */
00037   LCD_DATABUS = cmd;
00038   LCD_ENABLE = 0; /* Falling edge */
00039 }

void LcdPutConstantString (  char code *  str  ) 
 

Low level: Send a zero-terminated string of bytes to lcd from buffer in ROM.

Example: LcdPutConstantString ("Hello!");

Parameters:
*str pointer to a zero-terminated string in code ROM.

Definition at line 102 of file lcd.c.

References LcdPutChar().

Referenced by LcdPrintGenericResult(), LcdSelectFont(), LcdSplashScreen(), main(), PlayCurrentFile(), and UpdateDisplay(). 

00102                                          {
00103   while (*str)
00104     {
00105       LcdPutChar (*str++);
00106     }
00107 }

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void LcdPutHex16 (  unsigned int  value  ) 
 

Print a 16-bit hex value on LCD.

Definition at line 168 of file lcd.c.

References lcd_hexchars, and LcdPutChar(). 

00168                                      {
00169   LcdPutChar(lcd_hexchars[value>>12]);
00170   LcdPutChar(lcd_hexchars[(value>>8)&0xf]);
00171   LcdPutChar(lcd_hexchars[(value>>4)&0xf]);
00172   LcdPutChar(lcd_hexchars[(value)&0xf]);
00173 }

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void LcdPutHex8 (  unsigned char  value  ) 
 

Print an 8-bit hex value on LCD.

Definition at line 177 of file lcd.c.

References lcd_hexchars, and LcdPutChar(). 

00177                                      {
00178 
00179   LcdPutChar(lcd_hexchars[(value>>4)&0xf]);
00180   LcdPutChar(lcd_hexchars[(value)&0xf]);
00181 }

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void LcdPutString (  char *  str  ) 
 

Low level: Send a zero-terminated string of bytes to lcd from buffer in any memory.

Example: LcdPutString (s);

Parameters:
*str pointer to a zero-terminated string in idata segment
Warning:
Do not call for const type strings in the ROM!

Definition at line 89 of file lcd.c.

References LcdPutChar().

Referenced by InitDisplay(). 

00089                               {
00090   while (*str) {
00091     LcdPutChar (*str++);
00092   }
00093 }

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void LcdPutUInt (  unsigned long  value  ) 
 

Print a 16-bit unsigned integer value on LCD.

Definition at line 221 of file lcd.c.

References LcdPutChar().

Referenced by main(), and UpdateDisplay(). 

00221                                     {
00222   xdata unsigned char valueString[10];
00223   char c;
00224   for (c=0; c<10; c++){
00225     valueString[c]=value % 10;
00226     value = value / 10;
00227   }
00228   c=9;
00229   while ((valueString[c]==0) && (c!=0))
00230     c--;
00231   for (;c!=0;c--)
00232     LcdPutChar('0'+valueString[c]);
00233   LcdPutChar('0'+valueString[0]);
00234 
00235 }

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void LcdReset (   ) 
 

Low level: Reset LCD.

Definition at line 56 of file lcd.c.

References InitiateDelay, LCD_ENABLE, lcdFont_barchars, LcdPutCommand(), LcdSelectFont(), and WaitOutDelay.

Referenced by AvailableProcessorTime(), InitDisplay(), LcdSplashScreen(), and main(). 

00056                {
00057 
00058 
00059   LCD_ENABLE = 0;
00060   InitiateDelay(0); /* Initialize the delay system */
00061 
00062   LcdPutCommand(56); /* 8 data bits, 2 lines */
00063   InitiateDelay(39);
00064 
00065   WaitOutDelay();
00066   LcdPutCommand(56); /* Command 2 times "just in case" */
00067   InitiateDelay(39);
00068 
00069   WaitOutDelay();
00070   LcdPutCommand(12); /* Panel on, no cursor */
00071   InitiateDelay(39);
00072 
00073   WaitOutDelay();
00074   LcdPutCommand(1);  /* Clear screen */
00075   InitiateDelay(1530); /* Start a 1.53 ms delay */
00076 
00077   LcdSelectFont(lcdFont_barchars);
00078 
00079 }

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void LcdSelectFont (  ROM_CHAR_PTR  font  ) 
 

Definition at line 43 of file lcd.c.

References LcdLocateCG, LcdLocateHome, LcdPutConstantString(), and ROM_CHAR_PTR.

Referenced by AvailableProcessorTime(), LcdReset(), and LcdSplashScreen(). 

00043                                      {
00044   static ROM_CHAR_PTR loadedFont = 0;
00045   if (loadedFont != font){
00046     loadedFont=font;
00047     
00048     LcdLocateCG();
00049     LcdPutConstantString(font);  
00050     LcdLocateHome();
00051    
00052   }
00053 }

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void LcdSplashScreen (   ) 
 

Splash screen.

Definition at line 147 of file lcd.c.

References LcdFadeIn(), LcdFadeOut(), lcdFont_vlsichars, LcdLocateHome, LcdLocateLine2, LcdPutChar(), LcdPutConstantString(), LcdReset(), and LcdSelectFont(). 

00147                       {
00148     
00149   LcdReset();
00150  
00151   LcdSelectFont(lcdFont_vlsichars);
00152   
00153   LcdLocateHome();
00154   
00155   LcdPutChar(0);
00156   LcdPutConstantString("\1\2\3 Sol");
00157   LcdLocateLine2();
00158   LcdPutConstantString("ution Oy");
00159 
00160  
00161   LcdFadeIn();
00162   LcdFadeOut();
00163  
00164 }

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Variable Documentation

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

hexadecimal character set

Definition at line 11 of file lcd.c.

Referenced by LcdPrintGenericResult(), LcdPutHex16(), and LcdPutHex8().

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