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1 /* |
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2 * Project Frontplatte |
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3 * |
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4 * t6963.c - Controll a t6963c display |
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5 * |
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6 * This file is released under the GNU General Public License. Refer |
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7 * to the COPYING file distributed with this package. |
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8 * |
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9 * (c) 2007 Carsten Presser cpresser AT fsing.uni-sb.de |
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10 * heavily inspired by Holger Klabunde |
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11 */ |
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12 |
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13 |
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14 /** I N C L U D E S **********************************************************/ |
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15 #include <p18cxxx.h> |
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16 #include "t6963.h" |
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17 #include "io_cfg.h" |
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18 |
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19 /** P R I V A T E P R O T O T Y P E S ***************************************/ |
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20 unsigned char lcd_checkBusy(void); |
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21 |
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22 /** V A R I A B L E S ********************************************************/ |
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23 unsigned char lcd_auto_mode = MODE_NOAUTO; |
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24 |
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25 |
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26 /** H I G H L E V E L ********************************************************/ |
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27 void lcd_ClearScreen(void) |
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28 { |
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29 unsigned int i; |
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30 |
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31 // Address Pointer Set |
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32 lcd_WriteData(0x00); // byte1 |
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33 lcd_WriteData(0x00); // byte2 |
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34 lcd_WriteCommand(0x24); //set! |
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35 |
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36 |
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37 // bis 0x08F0 löschen... |
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38 lcd_SetAutomode(MODE_AUTO); |
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39 for(i=0; i <= 0x11E; i++) |
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40 { |
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41 lcd_WriteData(0x00); lcd_WriteData(0x00); |
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42 lcd_WriteData(0x00); lcd_WriteData(0x00); |
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43 lcd_WriteData(0x00); lcd_WriteData(0x00); |
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44 lcd_WriteData(0x00); lcd_WriteData(0x00); |
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45 } |
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46 lcd_SetAutomode(MODE_NOAUTO); |
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47 |
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48 lcd_WriteData(0x00); // byte1 |
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49 lcd_WriteData(0x00); // byte2 |
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50 lcd_WriteCommand(0x24); //set! |
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51 |
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52 } |
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53 |
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54 void lcd_InitDisplay(void) |
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55 { |
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56 mLcdDataDirOut(); |
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57 mLcdWriteData(0x00); |
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58 mLcdInitCtrl(); |
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59 |
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60 |
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61 // MODE_SET |
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62 lcd_WriteCommand(0x80); // OR-Mode; CG-ROM Mode |
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63 |
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64 // DISPLAY_MODE |
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65 lcd_WriteCommand(0x9C); // GFX-Mode=1, Text-Mode=1, Cursor=0, Blink=0 -> C |
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66 |
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67 |
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68 // CONTROL_WORD set Text-Area-Home |
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69 lcd_WriteData(0x00); // byte1 |
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70 lcd_WriteData(0x08); // byte2 |
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71 lcd_WriteCommand(0x40); //set! |
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72 |
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73 // CONTROL_WORD SET Text-Area |
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74 lcd_WriteData(0x1E); // TA-Value (Address of Second Line) |
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75 lcd_WriteData(0x00); // always Zero |
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76 lcd_WriteCommand(0x41); // set! |
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77 |
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78 // CONTROL_WORD set GFX-Area-Home |
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79 lcd_WriteData(0x00); // byte1 |
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80 lcd_WriteData(0x00); // byte2 |
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81 lcd_WriteCommand(0x42); //set! |
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82 |
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83 // CONTROL_WORD SET GFX-Area |
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84 lcd_WriteData(0x1E); // Start-Address of Second Line |
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85 lcd_WriteData(0x00); // always Zero |
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86 lcd_WriteCommand(0x43); // set! |
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87 |
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88 |
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89 |
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90 lcd_ClearScreen(); |
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91 } |
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92 |
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93 /** I N T E R F A C E ********************************************************/ |
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94 unsigned char lcd_CheckBusy(void) |
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95 { |
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96 unsigned char by; |
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97 |
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98 D_CD = MODE_COMMAND; |
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99 mLcdDataDirIn(); |
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100 |
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101 if (lcd_auto_mode == MODE_AUTO) |
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102 { |
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103 // in auto_mode only status3 is valid |
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104 do { |
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105 D_RD = 0; |
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106 by = mLcdReadData(); |
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107 by &= 0x08; |
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108 D_RD = 1; |
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109 } |
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110 while (by!=0x08); |
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111 } |
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112 else |
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113 { |
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114 // check status1 & status 2 |
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115 do { |
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116 D_RD = 0; |
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117 by = mLcdReadData(); |
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118 by &= 0x03; |
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119 D_RD = 1; |
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120 } |
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121 while (by!=0x03); |
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122 } |
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123 |
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124 mLcdDataDirOut(); |
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125 return by; |
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126 } |
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127 |
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128 void lcd_SetAutomode(unsigned char mode) |
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129 { |
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130 unsigned char by; |
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131 |
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132 if (mode == MODE_AUTO) |
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133 { |
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134 lcd_WriteCommand(0xB0); // Data Auto Write Set |
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135 lcd_CheckBusy(); |
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136 } |
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137 else |
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138 { |
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139 lcd_WriteCommand(0xB2); // Auto Mode Reset |
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140 } |
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141 |
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142 lcd_auto_mode = mode; |
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143 return; |
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144 } |
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145 |
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146 |
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147 void lcd_WriteData(unsigned char dat) |
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148 { |
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149 lcd_CheckBusy(); |
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150 |
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151 D_CD = MODE_DATA; |
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152 mLcdWriteData(dat); //Daten schreiben |
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153 D_WR = 0; |
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154 D_WR = 1; |
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155 } |
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156 |
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157 void lcd_WriteCommand(unsigned char comand) |
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158 { |
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159 lcd_CheckBusy(); |
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160 |
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161 D_CD = MODE_COMMAND; |
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162 mLcdWriteData(comand); //Kommando schreiben |
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163 D_WR = 0; |
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164 D_WR = 1; |
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165 } |
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166 |
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167 void lcd_WriteByte(unsigned char dat) |
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168 { |
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169 lcd_WriteData(dat); //Daten schreiben |
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170 lcd_WriteCommand(0xC0); //Kommando schreiben |
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171 } |
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172 |