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1 /* |
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2 |
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3 u8x8_d_lc7981.c |
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4 |
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5 Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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6 |
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7 Copyright (c) 2016, olikraus@gmail.com |
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8 All rights reserved. |
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9 |
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10 Redistribution and use in source and binary forms, with or without modification, |
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11 are permitted provided that the following conditions are met: |
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12 |
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13 * Redistributions of source code must retain the above copyright notice, this list |
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14 of conditions and the following disclaimer. |
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15 |
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16 * Redistributions in binary form must reproduce the above copyright notice, this |
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17 list of conditions and the following disclaimer in the documentation and/or other |
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18 materials provided with the distribution. |
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19 |
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20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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33 |
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34 |
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35 |
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36 */ |
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37 #include "u8x8.h" |
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38 |
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39 |
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40 |
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41 |
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42 /* no powersave mode for the LC7981 */ |
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43 // static const uint8_t u8x8_d_lc7981_powersave0_seq[] = { |
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44 // U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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45 // U8X8_END_TRANSFER(), /* disable chip */ |
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46 // U8X8_END() /* end of sequence */ |
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47 // }; |
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48 |
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49 // static const uint8_t u8x8_d_lc7981_powersave1_seq[] = { |
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50 // U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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51 // U8X8_END_TRANSFER(), /* disable chip */ |
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52 // U8X8_END() /* end of sequence */ |
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53 // }; |
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54 |
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55 /* no hardware flip for the LC7981 */ |
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56 // static const uint8_t u8x8_d_lc7981_flip0_seq[] = { |
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57 // U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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58 // U8X8_END_TRANSFER(), /* disable chip */ |
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59 // U8X8_END() /* end of sequence */ |
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60 // }; |
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61 |
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62 // static const uint8_t u8x8_d_lc7981_flip1_seq[] = { |
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63 // U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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64 // U8X8_END_TRANSFER(), /* disable chip */ |
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65 // U8X8_END() /* end of sequence */ |
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66 // }; |
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67 |
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68 |
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69 /* http://graphics.stanford.edu/~seander/bithacks.html */ |
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70 static uint8_t reverse_byte(uint8_t v) |
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71 { |
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72 // if ( v != 0 && v != 255 ) does not help much |
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73 { |
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74 // swap odd and even bits |
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75 v = ((v >> 1) & 0x055) | ((v & 0x055) << 1); |
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76 // swap consecutive pairs |
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77 v = ((v >> 2) & 0x033) | ((v & 0x033) << 2); |
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78 // swap nibbles ... |
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79 v = ((v >> 4) & 0x00F) | ((v & 0x00F) << 4); |
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80 } |
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81 return v; |
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82 } |
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83 |
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84 static uint8_t u8x8_d_lc7981_common(u8x8_t *u8x8, uint8_t msg, U8X8_UNUSED uint8_t arg_int, void *arg_ptr) |
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85 { |
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86 uint8_t c, i, j; |
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87 uint16_t y; |
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88 uint8_t *ptr; |
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89 switch(msg) |
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90 { |
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91 case U8X8_MSG_DISPLAY_DRAW_TILE: |
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92 y = (((u8x8_tile_t *)arg_ptr)->y_pos); |
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93 y*=8; |
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94 y*= u8x8->display_info->tile_width; |
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95 /* x = ((u8x8_tile_t *)arg_ptr)->x_pos; x is ignored... no u8x8 support */ |
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96 u8x8_cad_StartTransfer(u8x8); |
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97 /* |
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98 Tile structure is reused here for the t6963, however u8x8 is not supported |
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99 tile_ptr points to data which has cnt*8 bytes (same as SSD1306 tiles) |
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100 Buffer is expected to have 8 lines of code fitting to the t6963 internal memory |
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101 "cnt" includes the number of horizontal bytes. width is equal to cnt*8 |
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102 |
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103 x is assumed to be zero |
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104 |
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105 TODO: Consider arg_int, however arg_int is not used by u8g2 |
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106 */ |
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107 c = ((u8x8_tile_t *)arg_ptr)->cnt; /* number of tiles */ |
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108 ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr; /* data ptr to the tiles */ |
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109 for( i = 0; i < 8; i++ ) |
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110 { |
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111 u8x8_cad_SendCmd(u8x8, 0x0a ); /* display ram (cursor) address low byte */ |
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112 u8x8_cad_SendArg(u8x8, y&255); |
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113 u8x8_cad_SendCmd(u8x8, 0x0b ); /* display ram (cursor) address high byte */ |
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114 u8x8_cad_SendArg(u8x8, y>>8); |
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115 |
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116 u8x8_cad_SendCmd(u8x8, 0x0c ); /* write start */ |
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117 /* |
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118 The LC7981 has the MSB at the right position, which is exactly the opposite to the T6963. |
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119 Instead of writing a third hvline procedure for this device, we just revert the bytes before |
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120 transmit. This is slow because: |
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121 - the bit reverse itself |
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122 - the single byte transfer |
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123 The one byte is transmitted via SendArg, which is ok, because CAD = 100 |
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124 */ |
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125 for( j = 0; j < c; j++ ) |
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126 u8x8_cad_SendArg(u8x8, reverse_byte(*ptr++)); |
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127 |
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128 //u8x8_cad_SendData(u8x8, c, ptr); /* note: SendData can not handle more than 255 bytes, send one line of data */ |
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129 //ptr += u8x8->display_info->tile_width; |
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130 |
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131 y += u8x8->display_info->tile_width; |
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132 } |
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133 |
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134 u8x8_cad_EndTransfer(u8x8); |
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135 break; |
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136 /* handled in the calling procedure |
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137 case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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138 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_lc7981_128x64_display_info); |
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139 break; |
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140 case U8X8_MSG_DISPLAY_INIT: |
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141 u8x8_d_helper_display_init(u8x8); |
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142 u8x8_cad_SendSequence(u8x8, u8x8_d_uc1701_dogs102_init_seq); |
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143 break; |
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144 */ |
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145 /* power save is not there... |
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146 case U8X8_MSG_DISPLAY_SET_POWER_SAVE: |
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147 if ( arg_int == 0 ) |
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148 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_powersave0_seq); |
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149 else |
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150 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_powersave1_seq); |
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151 break; |
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152 */ |
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153 /* hardware flip not is not available |
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154 case U8X8_MSG_DISPLAY_SET_FLIP_MODE: |
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155 if ( arg_int == 0 ) |
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156 { |
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157 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_flip0_seq); |
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158 u8x8->x_offset = u8x8->display_info->default_x_offset; |
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159 } |
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160 else |
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161 { |
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162 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_flip1_seq); |
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163 u8x8->x_offset = u8x8->display_info->flipmode_x_offset; |
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164 } |
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165 break; |
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166 */ |
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167 #ifdef U8X8_WITH_SET_CONTRAST |
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168 /* no contrast setting :-( |
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169 case U8X8_MSG_DISPLAY_SET_CONTRAST: |
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170 u8x8_cad_StartTransfer(u8x8); |
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171 u8x8_cad_SendCmd(u8x8, 0x081 ); |
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172 u8x8_cad_SendArg(u8x8, arg_int ); |
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173 u8x8_cad_EndTransfer(u8x8); |
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174 break; |
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175 */ |
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176 #endif |
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177 default: |
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178 return 0; |
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179 } |
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180 return 1; |
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181 } |
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182 |
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183 /*================================================*/ |
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184 /* LC7981 160x80 LCD*/ |
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185 |
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186 static const u8x8_display_info_t u8x8_lc7981_160x80_display_info = |
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187 { |
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188 /* chip_enable_level = */ 0, /* LC7981 has a low active CS*/ |
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189 /* chip_disable_level = */ 1, |
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190 |
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191 /* from here... */ |
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192 /* post_chip_enable_wait_ns = */ 20, |
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193 /* pre_chip_disable_wait_ns = */ 20, |
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194 /* reset_pulse_width_ms = */ 1, |
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195 /* post_reset_wait_ms = */ 10, |
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196 /* sda_setup_time_ns = */ 30, |
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197 /* sck_pulse_width_ns = */ 65, /* half of cycle time */ |
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198 /* sck_clock_hz = */ 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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199 /* spi_mode = */ 0, /* active high, rising edge */ |
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200 /* i2c_bus_clock_100kHz = */ 4, |
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201 /* ... to here, values are ignored, because this is a parallel interface only */ |
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202 |
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203 /* data_setup_time_ns = */ 220, |
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204 /* write_pulse_width_ns = */ 20, |
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205 /* tile_width = */ 20, /* width of 20*8=160 pixel */ |
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206 /* tile_hight = */ 10, |
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207 /* default_x_offset = */ 0, |
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208 /* flipmode_x_offset = */ 0, |
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209 /* pixel_width = */ 160, |
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210 /* pixel_height = */ 80 |
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211 }; |
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212 |
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213 static const uint8_t u8x8_d_lc7981_160x80_init_seq[] = { |
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214 |
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215 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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216 |
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217 U8X8_DLY(50), |
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218 |
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219 U8X8_CA(0x00, 0x32), /* display on (bit 5), master mode on (bit 4), graphics mode on (bit 1) */ |
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220 U8X8_CA(0x01, 0x07), /* character/bits per pixel pitch */ |
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221 U8X8_CA(0x02, 160/8-1), /* number of chars/byte width of the screen */ |
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222 U8X8_CA(0x03, 0x50), /* time division: 50 (1/80 duty cycle) */ |
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223 U8X8_CA(0x08, 0x00), /* display start low */ |
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224 U8X8_CA(0x09, 0x00), /* display start high */ |
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225 |
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226 U8X8_DLY(10), |
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227 |
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228 U8X8_END_TRANSFER(), /* disable chip */ |
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229 U8X8_END() /* end of sequence */ |
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230 }; |
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231 |
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232 uint8_t u8x8_d_lc7981_160x80(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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233 { |
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234 /* call common procedure first and handle messages there */ |
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235 if ( u8x8_d_lc7981_common(u8x8, msg, arg_int, arg_ptr) == 0 ) |
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236 { |
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237 /* msg not handled, then try here */ |
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238 switch(msg) |
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239 { |
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240 case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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241 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_lc7981_160x80_display_info); |
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242 break; |
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243 case U8X8_MSG_DISPLAY_INIT: |
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244 u8x8_d_helper_display_init(u8x8); |
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245 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_160x80_init_seq); |
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246 break; |
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247 default: |
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248 return 0; /* msg unknown */ |
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249 } |
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250 } |
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251 return 1; |
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252 } |
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253 |
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254 |
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255 /*================================================*/ |
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256 /* LC7981 160x160 LCD*/ |
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257 |
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258 static const u8x8_display_info_t u8x8_lc7981_160x160_display_info = |
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259 { |
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260 /* chip_enable_level = */ 0, /* LC7981 has a low active CS*/ |
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261 /* chip_disable_level = */ 1, |
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262 |
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263 /* from here... */ |
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264 /* post_chip_enable_wait_ns = */ 20, |
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265 /* pre_chip_disable_wait_ns = */ 20, |
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266 /* reset_pulse_width_ms = */ 1, |
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267 /* post_reset_wait_ms = */ 10, |
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268 /* sda_setup_time_ns = */ 30, |
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269 /* sck_pulse_width_ns = */ 65, /* half of cycle time */ |
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270 /* sck_clock_hz = */ 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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271 /* spi_mode = */ 0, /* active high, rising edge */ |
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272 /* i2c_bus_clock_100kHz = */ 4, |
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273 /* ... to here, values are ignored, because this is a parallel interface only */ |
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274 |
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275 /* data_setup_time_ns = */ 220, |
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276 /* write_pulse_width_ns = */ 20, |
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277 /* tile_width = */ 20, /* width of 20*8=160 pixel */ |
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278 /* tile_hight = */ 20, |
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279 /* default_x_offset = */ 0, |
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280 /* flipmode_x_offset = */ 0, |
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281 /* pixel_width = */ 160, |
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282 /* pixel_height = */ 160 |
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283 }; |
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284 |
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285 static const uint8_t u8x8_d_lc7981_160x160_init_seq[] = { |
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286 |
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287 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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288 |
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289 U8X8_DLY(50), |
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290 |
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291 U8X8_CA(0x00, 0x32), /* display on (bit 5), master mode on (bit 4), graphics mode on (bit 1) */ |
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292 U8X8_CA(0x01, 0x07), /* character/bits per pixel pitch */ |
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293 U8X8_CA(0x02, 160/8-1), /* number of chars/byte width of the screen */ |
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294 U8X8_CA(0x03, 159), /* time division */ |
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295 U8X8_CA(0x08, 0x00), /* display start low */ |
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296 U8X8_CA(0x09, 0x00), /* display start high */ |
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297 |
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298 U8X8_DLY(10), |
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299 |
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300 U8X8_END_TRANSFER(), /* disable chip */ |
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301 U8X8_END() /* end of sequence */ |
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302 }; |
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303 |
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304 uint8_t u8x8_d_lc7981_160x160(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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305 { |
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306 /* call common procedure first and handle messages there */ |
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307 if ( u8x8_d_lc7981_common(u8x8, msg, arg_int, arg_ptr) == 0 ) |
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308 { |
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309 /* msg not handled, then try here */ |
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310 switch(msg) |
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311 { |
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312 case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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313 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_lc7981_160x160_display_info); |
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314 break; |
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315 case U8X8_MSG_DISPLAY_INIT: |
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316 u8x8_d_helper_display_init(u8x8); |
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317 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_160x160_init_seq); |
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318 break; |
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319 default: |
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320 return 0; /* msg unknown */ |
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321 } |
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322 } |
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323 return 1; |
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324 } |
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325 |
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326 |
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327 /*================================================*/ |
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328 /* LC7981 240x128 LCD*/ |
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329 |
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330 static const u8x8_display_info_t u8x8_lc7981_240x128_display_info = |
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331 { |
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332 /* chip_enable_level = */ 0, /* LC7981 has a low active CS*/ |
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333 /* chip_disable_level = */ 1, |
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334 |
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335 /* from here... */ |
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336 /* post_chip_enable_wait_ns = */ 20, |
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337 /* pre_chip_disable_wait_ns = */ 20, |
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338 /* reset_pulse_width_ms = */ 1, |
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339 /* post_reset_wait_ms = */ 10, |
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340 /* sda_setup_time_ns = */ 30, |
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341 /* sck_pulse_width_ns = */ 65, /* half of cycle time */ |
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342 /* sck_clock_hz = */ 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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343 /* spi_mode = */ 0, /* active high, rising edge */ |
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344 /* i2c_bus_clock_100kHz = */ 4, |
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345 /* ... to here, values are ignored, because this is a parallel interface only */ |
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346 |
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347 /* data_setup_time_ns = */ 220, |
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348 /* write_pulse_width_ns = */ 20, |
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349 /* tile_width = */ 30, /* width of 30*8=240 pixel */ |
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350 /* tile_hight = */ 16, |
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351 /* default_x_offset = */ 0, |
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352 /* flipmode_x_offset = */ 0, |
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353 /* pixel_width = */ 240, |
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354 /* pixel_height = */ 128 |
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355 }; |
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356 |
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357 static const uint8_t u8x8_d_lc7981_240x128_init_seq[] = { |
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358 |
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359 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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360 |
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361 U8X8_DLY(50), |
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362 |
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363 U8X8_CA(0x00, 0x32), /* display on (bit 5), master mode on (bit 4), graphics mode on (bit 1) */ |
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364 U8X8_CA(0x01, 0x07), /* character/bits per pixel pitch */ |
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365 U8X8_CA(0x02, 240/8-1), /* number of chars/byte width of the screen */ |
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366 U8X8_CA(0x03, 0x7f), /* time division */ |
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367 U8X8_CA(0x08, 0x00), /* display start low */ |
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368 U8X8_CA(0x09, 0x00), /* display start high */ |
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369 |
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370 U8X8_DLY(10), |
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371 |
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372 U8X8_END_TRANSFER(), /* disable chip */ |
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373 U8X8_END() /* end of sequence */ |
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374 }; |
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375 |
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376 uint8_t u8x8_d_lc7981_240x128(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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377 { |
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378 /* call common procedure first and handle messages there */ |
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379 if ( u8x8_d_lc7981_common(u8x8, msg, arg_int, arg_ptr) == 0 ) |
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380 { |
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381 /* msg not handled, then try here */ |
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382 switch(msg) |
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383 { |
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384 case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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385 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_lc7981_240x128_display_info); |
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386 break; |
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387 case U8X8_MSG_DISPLAY_INIT: |
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388 u8x8_d_helper_display_init(u8x8); |
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389 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_240x128_init_seq); |
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390 break; |
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391 default: |
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392 return 0; /* msg unknown */ |
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393 } |
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394 } |
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395 return 1; |
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396 } |
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397 |
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398 |
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399 /*================================================*/ |
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400 /* LC7981 240x64 LCD*/ |
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401 /* https://github.com/olikraus/u8g2/issues/642 */ |
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402 |
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403 static const u8x8_display_info_t u8x8_lc7981_240x64_display_info = |
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404 { |
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405 /* chip_enable_level = */ 0, /* LC7981 has a low active CS*/ |
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406 /* chip_disable_level = */ 1, |
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407 |
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408 /* from here... */ |
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409 /* post_chip_enable_wait_ns = */ 20, |
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410 /* pre_chip_disable_wait_ns = */ 20, |
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411 /* reset_pulse_width_ms = */ 1, |
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412 /* post_reset_wait_ms = */ 10, |
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413 /* sda_setup_time_ns = */ 30, |
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414 /* sck_pulse_width_ns = */ 65, /* half of cycle time */ |
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415 /* sck_clock_hz = */ 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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416 /* spi_mode = */ 0, /* active high, rising edge */ |
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417 /* i2c_bus_clock_100kHz = */ 4, |
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418 /* ... to here, values are ignored, because this is a parallel interface only */ |
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419 |
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420 /* data_setup_time_ns = */ 220, |
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421 /* write_pulse_width_ns = */ 20, |
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422 /* tile_width = */ 30, /* width of 30*8=240 pixel */ |
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423 /* tile_hight = */ 8, |
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424 /* default_x_offset = */ 0, |
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425 /* flipmode_x_offset = */ 0, |
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426 /* pixel_width = */ 240, |
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427 /* pixel_height = */ 64 |
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428 }; |
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429 |
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430 static const uint8_t u8x8_d_lc7981_240x64_init_seq[] = { |
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431 |
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432 U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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433 |
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434 U8X8_DLY(50), |
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435 |
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436 U8X8_CA(0x00, 0x32), /* display on (bit 5), master mode on (bit 4), graphics mode on (bit 1) */ |
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437 U8X8_CA(0x01, 0x07), /* character/bits per pixel pitch */ |
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438 U8X8_CA(0x02, 240/8-1), /* number of chars/byte width of the screen */ |
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439 U8X8_CA(0x03, 0x7f), /* time division */ |
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440 U8X8_CA(0x08, 0x00), /* display start low */ |
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441 U8X8_CA(0x09, 0x00), /* display start high */ |
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442 |
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443 U8X8_DLY(10), |
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444 |
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445 U8X8_END_TRANSFER(), /* disable chip */ |
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446 U8X8_END() /* end of sequence */ |
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447 }; |
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448 |
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449 uint8_t u8x8_d_lc7981_240x64(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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450 { |
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451 /* call common procedure first and handle messages there */ |
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452 if ( u8x8_d_lc7981_common(u8x8, msg, arg_int, arg_ptr) == 0 ) |
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453 { |
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454 /* msg not handled, then try here */ |
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455 switch(msg) |
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456 { |
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457 case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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458 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_lc7981_240x64_display_info); |
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459 break; |
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460 case U8X8_MSG_DISPLAY_INIT: |
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461 u8x8_d_helper_display_init(u8x8); |
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462 u8x8_cad_SendSequence(u8x8, u8x8_d_lc7981_240x64_init_seq); |
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463 break; |
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464 default: |
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465 return 0; /* msg unknown */ |
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466 } |
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467 } |
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468 return 1; |
|
469 } |
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470 |