SerialLCD.cpp

00001 #include "SerialLCD.h"
00002 
00003 SerialLCD::SerialLCD(PinName tx, uint8_t type) : 
00004     Serial(tx, NC)
00005 {
00006     // Init
00007     baud(LCD_BAUD);
00008     setType(type);
00009     
00010     _rowoffset = 0;
00011     
00012     // Reset
00013     clear();
00014     setBrightness(30);
00015 }
00016 
00017 void SerialLCD::clear()
00018 {
00019     command(LCD_CLEARDISPLAY);
00020 }
00021 
00022 void SerialLCD::clearLine(uint8_t line)
00023 {
00024     if(line > 0 && line <= _numlines){
00025         setCursor(line, 1);
00026         printf("                ");
00027         setCursor(line, 1);
00028     }
00029 }
00030 
00031 void SerialLCD::selectLine(uint8_t line)
00032 {
00033     if(line > 0 && line <= _numlines){
00034         setCursor(line, 1);
00035     }
00036 }
00037 
00038 void SerialLCD::setBrightness(uint8_t num)
00039 {
00040     if(num >= 1 && num <= 30){
00041         specialCommand(LCD_BACKLIGHT | (num - 1));
00042     }
00043 }
00044 
00045 void SerialLCD::home()
00046 {
00047     command(LCD_RETURNHOME);
00048 }
00049 
00050 void SerialLCD::setSplash()
00051 {
00052     specialCommand(LCD_SETSPLASHSCREEN);
00053 }
00054 
00055 void SerialLCD::setType(uint8_t type)
00056 {
00057 /*
00058   3: type 2x16
00059   4: type 2x20
00060   5: type 4x16
00061   6: type 4x20
00062 */
00063     specialCommand(type);
00064     switch (type) {
00065       case 3:
00066         _numlines = LCD_2LINE;
00067         _numchars = LCD_16CHAR;
00068 
00069         break;
00070       case 4:
00071         _numlines = LCD_2LINE;
00072         _numchars = LCD_20CHAR;
00073 
00074         break;
00075       case 5:
00076         _numlines = LCD_4LINE;
00077         _numchars = LCD_16CHAR;
00078 
00079         break;
00080       case 6:
00081         _numlines = LCD_4LINE;
00082         _numchars = LCD_20CHAR;
00083 
00084         break;
00085 
00086       default:
00087         _numlines = LCD_2LINE;
00088         _numchars = LCD_16CHAR;
00089     }
00090 }
00091 
00092 void SerialLCD::toggleSplash()
00093 {
00094     specialCommand(LCD_SPLASHTOGGLE);
00095 }
00096 
00097 void SerialLCD::leftToRight()
00098 {
00099     _displaymode |= LCD_ENTRYLEFT;
00100     command(LCD_ENTRYMODESET | _displaymode);
00101 }
00102 
00103 void SerialLCD::rightToLeft()
00104 {
00105     _displaymode &= ~LCD_ENTRYLEFT;
00106     command(LCD_ENTRYMODESET | _displaymode);
00107 }
00108 
00109 void SerialLCD::blink()
00110 {
00111     _displaycontrol |= LCD_BLINKON;
00112     command(LCD_DISPLAYCONTROL | _displaycontrol);
00113 }
00114 
00115 void SerialLCD::noBlink()
00116 {
00117     _displaycontrol &= ~LCD_BLINKON;
00118     command(LCD_DISPLAYCONTROL | _displaycontrol);
00119 }
00120 
00121 void SerialLCD::cursor()
00122 {
00123     _displaycontrol |= LCD_CURSORON;
00124     command(LCD_DISPLAYCONTROL | _displaycontrol);
00125 }
00126 
00127 void SerialLCD::noCursor()
00128 {
00129     _displaycontrol &= ~LCD_CURSORON;
00130     command(LCD_DISPLAYCONTROL | _displaycontrol);
00131 }
00132 
00133 void SerialLCD::display()
00134 {
00135     _displaycontrol |= LCD_DISPLAYON;
00136     command(LCD_DISPLAYCONTROL | _displaycontrol);
00137 }
00138 
00139 void SerialLCD::noDisplay()
00140 {
00141     _displaycontrol &= ~LCD_DISPLAYON;
00142     command(LCD_DISPLAYCONTROL | _displaycontrol);
00143 }
00144 
00145 void SerialLCD::setCursor(uint8_t row, uint8_t col)
00146 {
00147     int row_offsets[2][4] = {
00148         { 0x00, 0x40, 0x10, 0x50 },
00149         { 0x00, 0x40, 0x14, 0x54 }
00150     };
00151     if((row > 0 && row < 3) && (col > 0 && col < 17)){
00152         command(LCD_SETDDRAMADDR | ((col - 1) + row_offsets[_rowoffset][(row - 1)]));
00153     }
00154 }
00155 
00156 void SerialLCD::createChar(uint8_t location, uint8_t charmap[])
00157 {
00158     location -= 1;
00159     location &= 0x07;
00160     for (int i=0; i<8; i++){
00161         command(LCD_SETCGRAMADDR | (location << 3) | i);
00162         putc(charmap[i]);
00163     }
00164 }
00165 
00166 void SerialLCD::printCustomChar(uint8_t num)
00167 {
00168     putc((num - 1));
00169 }
00170 
00171 void SerialLCD::scrollLeft()
00172 {
00173     command(0x18);
00174 }
00175 
00176 void SerialLCD::scrollRight()
00177 {
00178     command(0x1C);
00179 }
00180 
00181 // Private Functions
00182 
00183 void SerialLCD::command(uint8_t value)
00184 {
00185     putc(0xFE);
00186     putc(value);
00187     wait_ms(5);
00188 }
00189 
00190 void SerialLCD::specialCommand(uint8_t value)
00191 {
00192     putc(0x7C);
00193     putc(value);
00194     wait_ms(5);
00195 }