Sun, 08 Nov 2015 20:30:04 +0100
Added cursor control, but no blinking yet.
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1 | /***************************************************************************** |
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2 | * Copyright (C) 2015 |
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3 | * |
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4 | * Michiel Broek <mbroek at mbse dot eu> |
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5 | * |
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6 | * This file is part of the mbsePi-apps |
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7 | * |
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8 | * mbsePi-apps is free software; you can redistribute it and/or modify it |
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9 | * under the terms of the GNU General Public License as published by the |
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10 | * Free Software Foundation; either version 2, or (at your option) any |
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11 | * later version. |
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12 | * |
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13 | * mbsePi-apps is distributed in the hope that it will be useful, but |
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14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with mbsePi-apps; see the file COPYING. If not, write to the Free |
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20 | * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
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21 | *****************************************************************************/ |
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22 | |
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23 | /* |
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24 | * Simulated LCD driver based on HD44780U displays. |
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25 | */ |
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26 | |
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27 | #include "brewpanel.h" |
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28 | #include "slcd.h" |
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29 | #include "sdlgui.h" |
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30 | |
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31 | |
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32 | #ifdef HAVE_SDL_SDL_H |
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33 | |
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34 | // HD44780U Commands |
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35 | |
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36 | //#define SLCD_CLEAR 0x01 |
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37 | //#define SLCD_HOME 0x02 |
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38 | //#define SLCD_ENTRY 0x04 |
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39 | //#define SLCD_CTRL 0x08 |
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40 | //#define SLCD_CDSHIFT 0x10 |
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41 | //#define SLCD_FUNC 0x20 |
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42 | //#define SLCD_CGRAM 0x40 |
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43 | //#define SLCD_DGRAM 0x80 |
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44 | |
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45 | // // Bits in the entry register |
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46 | // |
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47 | // #define LCD_ENTRY_SH 0x01 |
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48 | // #define LCD_ENTRY_ID 0x02 |
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49 | |
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50 | // Bits in the control register |
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51 | #define SLCD_BLINK_CTRL 0x01 |
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52 | #define SLCD_CURSOR_CTRL 0x02 |
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53 | #define SLCD_DISPLAY_CTRL 0x04 |
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54 | |
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55 | |
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56 | struct slcdDataStruct |
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57 | { |
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58 | int x; /* Start x pixels */ |
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59 | int y; /* Start y pixels */ |
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60 | int w; /* Width in pixels */ |
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61 | int h; /* Height in pixels */ |
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62 | int cols; /* Width in characters */ |
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63 | int rows; /* Height in characters */ |
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64 | int cx; /* Cursor x position */ |
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65 | int cy; /* Cursor y position */ |
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66 | Uint8 cgram[8][8]; /* Characters in CGRAM */ |
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67 | int control; /* Control register */ |
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68 | }; |
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69 | struct slcdDataStruct *slcds [MAX_SLCDS] ; |
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70 | |
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71 | |
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72 | |
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73 | |
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74 | void slcdHome(int fd) |
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75 | { |
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76 | struct slcdDataStruct *lcd = slcds [fd]; |
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77 | |
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78 | lcd->cx = lcd->cy = 0; |
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79 | SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, lcd->control & SLCD_CURSOR_CTRL, lcd->control & SLCD_BLINK_CTRL); |
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80 | } |
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81 | |
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82 | |
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83 | |
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84 | void slcdClear(int fd) |
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85 | { |
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86 | struct slcdDataStruct *lcd = slcds [fd]; |
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87 | int i; |
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88 | |
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89 | lcd->cx = lcd->cy = 0; |
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90 | for (i = 0; i < (lcd->cols * lcd->rows); i++) |
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91 | slcdPutchar(fd, ' '); |
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92 | lcd->cx = lcd->cy = 0; |
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93 | SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, lcd->control & SLCD_CURSOR_CTRL, lcd->control & SLCD_BLINK_CTRL); |
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94 | } |
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95 | |
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96 | |
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97 | |
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98 | void slcdDisplay(int fd, int state) |
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99 | { |
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100 | struct slcdDataStruct *lcd = slcds [fd]; |
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101 | |
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102 | if (state) |
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103 | lcd->control |= SLCD_DISPLAY_CTRL; |
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104 | else |
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105 | lcd->control &= ~SLCD_DISPLAY_CTRL; |
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106 | } |
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107 | |
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108 | |
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109 | |
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110 | void slcdCursor(int fd, int state) |
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111 | { |
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112 | struct slcdDataStruct *lcd = slcds [fd]; |
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113 | |
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114 | if (state) |
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115 | lcd->control |= SLCD_CURSOR_CTRL; |
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116 | else |
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117 | lcd->control &= ~SLCD_CURSOR_CTRL; |
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118 | SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, lcd->control & SLCD_CURSOR_CTRL, lcd->control & SLCD_BLINK_CTRL); |
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119 | } |
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120 | |
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121 | |
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122 | |
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123 | void slcdCursorBlink(int fd, int state) |
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124 | { |
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125 | struct slcdDataStruct *lcd = slcds [fd]; |
412
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126 | |
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127 | if (state) |
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128 | lcd->control |= SLCD_BLINK_CTRL; |
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129 | else |
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130 | lcd->control &= ~SLCD_BLINK_CTRL; |
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131 | SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, lcd->control & SLCD_CURSOR_CTRL, lcd->control & SLCD_BLINK_CTRL); |
412
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132 | } |
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133 | |
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134 | |
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135 | |
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136 | void slcdPosition(int fd, int x, int y) |
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137 | { |
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138 | struct slcdDataStruct *lcd = slcds [fd]; |
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139 | |
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140 | if ((x > lcd->cols) || (x < 0)) |
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141 | return ; |
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142 | if ((y > lcd->rows) || (y < 0)) |
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143 | return ; |
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144 | |
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145 | lcd->cx = x ; |
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146 | lcd->cy = y ; |
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147 | SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, lcd->control & SLCD_CURSOR_CTRL, lcd->control & SLCD_BLINK_CTRL); |
412
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148 | } |
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149 | |
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150 | |
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151 | |
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152 | void slcdCharDef(int fd, int index, Uint8 data[8]) |
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153 | { |
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154 | struct slcdDataStruct *lcd = slcds [fd]; |
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155 | int i; |
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156 | |
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157 | for (i = 0 ; i < 8 ; i++) |
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158 | lcd->cgram[index][i] = data[i]; |
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159 | } |
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160 | |
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161 | |
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162 | |
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163 | |
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164 | void slcdPutchar(int fd, Uint8 data) |
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165 | { |
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166 | struct slcdDataStruct *lcd = slcds [fd]; |
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167 | |
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168 | SDLGui_Char(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, data, 0); |
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169 | |
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170 | if (++lcd->cx == lcd->cols) { |
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171 | lcd->cx = 0; |
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172 | if (++lcd->cy == lcd->rows) |
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173 | lcd->cy = 0; |
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174 | } |
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175 | SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, lcd->control & SLCD_CURSOR_CTRL, lcd->control & SLCD_BLINK_CTRL); |
412
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176 | } |
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177 | |
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178 | |
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179 | |
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180 | void slcdPuts(int fd, const char *string) |
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181 | { |
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182 | while (*string) |
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183 | slcdPutchar(fd, *string++); |
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184 | } |
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185 | |
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186 | |
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187 | |
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188 | void slcdPrintf(int fd, const char *message, ...) |
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189 | { |
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190 | va_list argp; |
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191 | char buffer[1024]; |
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192 | |
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193 | va_start(argp, message); |
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194 | vsnprintf(buffer, 1023, message, argp); |
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195 | va_end(argp); |
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196 | slcdPuts(fd, buffer); |
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197 | } |
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198 | |
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199 | |
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200 | |
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201 | int slcdInit(int fd, int x, int y, int w, int h, int cols, int rows) |
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202 | { |
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203 | static int initialised = 0; |
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204 | int i, j; |
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205 | struct slcdDataStruct *lcd; |
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206 | |
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207 | if (initialised == 0) { |
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208 | initialised = 1 ; |
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209 | for (i = 0 ; i < MAX_SLCDS ; ++i) |
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210 | slcds[i] = NULL ; |
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211 | } |
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212 | |
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213 | if ((rows < 0) || (rows > 20)) |
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214 | return -1 ; |
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215 | |
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216 | if ((cols < 0) || (cols > 20)) |
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217 | return -1 ; |
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218 | |
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219 | /* |
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220 | * Create LCD |
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221 | */ |
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222 | if (slcds[fd] != NULL) { |
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223 | syslog(LOG_NOTICE, "slcdInit fd=%d already in use", fd); |
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224 | return -1; |
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225 | } |
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226 | if ((lcd = (struct slcdDataStruct *)malloc (sizeof (struct slcdDataStruct))) == NULL) { |
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227 | return -1; |
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228 | } |
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229 | |
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230 | lcd->x = x; |
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231 | lcd->y = y; |
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232 | lcd->w = w; |
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233 | lcd->h = h; |
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234 | lcd->cols = cols; |
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235 | lcd->rows = rows; |
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236 | lcd->cx = 0; |
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237 | lcd->cy = 0; |
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238 | for (i = 0; i < 8; i++) |
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239 | for (j = 0; j < 8; j++) |
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240 | lcd->cgram[i][j] = 0; |
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241 | lcd->control = 0; |
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242 | |
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243 | slcds[fd] = lcd; |
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244 | |
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245 | slcdDisplay(fd, TRUE); |
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246 | slcdCursor(fd, FALSE); |
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247 | slcdCursorBlink(fd, FALSE); |
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248 | slcdClear(fd); |
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249 | |
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250 | /* |
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251 | * Most LCD's start with the top row filled with blocks. |
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252 | */ |
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253 | for (i = 0; i < lcd->cols; i++) |
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254 | slcdPutchar(fd, 0x0ff); |
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255 | |
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256 | slcdDisplay(fd, TRUE); |
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257 | slcdCursor(fd, FALSE); |
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258 | slcdCursorBlink(fd, FALSE); |
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259 | slcdClear(fd); |
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260 | |
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261 | return fd; |
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262 | } |
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263 | |
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264 | |
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265 | #endif |