Wed, 04 Oct 2023 11:28:49 +0200
Version 0.3.1. Remove obsolete files from spiffs filesystem. Removed obsolete wifi stations.conf file and functions. Removed obsolete user screens.
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1 | /* |
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2 | |
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3 | u8x8_d_st7920.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 | The ST7920 controller does not support hardware graphics flip. |
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36 | Contrast adjustment is done by an external resistor --> no support for contrast adjustment |
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37 | |
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38 | |
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39 | */ |
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40 | #include "u8x8.h" |
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41 | |
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42 | |
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43 | |
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44 | static const uint8_t u8x8_d_st7920_init_seq[] = { |
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45 | |
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46 | U8X8_DLY(100), |
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47 | U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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48 | U8X8_DLY(10), |
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49 | |
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50 | U8X8_C(0x038), /* 8 Bit interface (DL=1), basic instruction set (RE=0) */ |
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51 | U8X8_C(0x008), /* display on, cursor & blink off; 0x08: all off */ |
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52 | U8X8_C(0x006), /* Entry mode: Cursor move to right ,DDRAM address counter (AC) plus 1, no shift */ |
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53 | U8X8_C(0x002), /* disable scroll, enable CGRAM adress */ |
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54 | U8X8_C(0x001), /* clear RAM, needs 1.6 ms */ |
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55 | U8X8_DLY(4), /* delay 2ms */ |
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56 | |
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57 | |
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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_st7920_powersave0_seq[] = { |
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63 | U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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64 | U8X8_C(0x038), /* 8 Bit interface (DL=1), basic instruction set (RE=0) */ |
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65 | U8X8_C(0x00c), /* display on, cursor & blink off */ |
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66 | U8X8_END_TRANSFER(), /* disable chip */ |
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67 | U8X8_END() /* end of sequence */ |
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68 | }; |
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69 | |
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70 | static const uint8_t u8x8_d_st7920_powersave1_seq[] = { |
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71 | U8X8_START_TRANSFER(), /* enable chip, delay is part of the transfer start */ |
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72 | U8X8_C(0x038), /* 8 Bit interface (DL=1), basic instruction set (RE=0) */ |
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73 | U8X8_C(0x008), /* display off */ |
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74 | U8X8_C(0x034), /* 8 Bit interface (DL=1), extended instruction set (RE=1) */ |
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75 | U8X8_C(0x001), /* Standby mode */ |
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76 | |
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77 | U8X8_END_TRANSFER(), /* disable chip */ |
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78 | U8X8_END() /* end of sequence */ |
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79 | }; |
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80 | |
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81 | |
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82 | uint8_t u8x8_d_st7920_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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83 | { |
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84 | uint8_t x, y, c, i; |
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85 | uint8_t *ptr; |
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86 | switch(msg) |
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87 | { |
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88 | /* U8X8_MSG_DISPLAY_SETUP_MEMORY is handled by the calling function */ |
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89 | /* |
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90 | case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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91 | break; |
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92 | */ |
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93 | case U8X8_MSG_DISPLAY_INIT: |
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94 | u8x8_d_helper_display_init(u8x8); |
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95 | u8x8_cad_SendSequence(u8x8, u8x8_d_st7920_init_seq); |
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96 | break; |
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97 | case U8X8_MSG_DISPLAY_SET_POWER_SAVE: |
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98 | if ( arg_int == 0 ) |
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99 | u8x8_cad_SendSequence(u8x8, u8x8_d_st7920_powersave0_seq); |
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100 | else |
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101 | u8x8_cad_SendSequence(u8x8, u8x8_d_st7920_powersave1_seq); |
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102 | break; |
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103 | case U8X8_MSG_DISPLAY_DRAW_TILE: |
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104 | y = (((u8x8_tile_t *)arg_ptr)->y_pos); |
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105 | y*=8; |
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106 | x = ((u8x8_tile_t *)arg_ptr)->x_pos; |
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107 | x /= 2; /* not sure whether this is a clever idea, problem is, the ST7920 can address only every second tile */ |
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108 | |
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109 | if ( y >= 32 ) /* this is the adjustment for 128x64 displays */ |
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110 | { |
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111 | y-=32; |
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112 | x+=8; |
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113 | } |
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114 | |
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115 | u8x8_cad_StartTransfer(u8x8); |
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116 | |
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117 | |
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118 | /* |
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119 | Tile structure is reused here for the ST7920, however u8x8 is not supported |
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120 | tile_ptr points to data which has cnt*8 bytes (same as SSD1306 tiles) |
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121 | Buffer is expected to have 8 lines of code fitting to the ST7920 internal memory |
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122 | "cnt" includes the number of horizontal bytes. width is equal to cnt*8 |
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123 | Also important: Width must be a multiple of 16 (ST7920 requirement), so cnt must be even. |
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124 | |
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125 | TODO: Consider arg_int, however arg_int is not used by u8g2 |
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126 | */ |
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127 | c = ((u8x8_tile_t *)arg_ptr)->cnt; /* number of tiles */ |
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128 | ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr; /* data ptr to the tiles */ |
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129 | /* The following byte is sent to allow the ST7920 to sync up with the data */ |
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130 | /* it solves some issues with garbage data */ |
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131 | u8x8_cad_SendCmd(u8x8, 0x03e ); /* enable extended mode */ |
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132 | u8x8_cad_SendCmd(u8x8, 0x03e ); /* enable extended mode, issue 487 */ |
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133 | for( i = 0; i < 8; i++ ) |
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134 | { |
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135 | //u8x8_cad_SendCmd(u8x8, 0x03e ); /* enable extended mode */ |
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136 | u8x8_cad_SendCmd(u8x8, 0x080 | (y+i) ); /* y pos */ |
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137 | u8x8_cad_SendCmd(u8x8, 0x080 | x ); /* set x pos */ |
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138 | c = ((u8x8_tile_t *)arg_ptr)->cnt; /* number of tiles */ |
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139 | |
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140 | //u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, 200, NULL); /* extra dely required */ |
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141 | u8x8_cad_SendData(u8x8, c, ptr); /* note: SendData can not handle more than 255 bytes, send one line of data */ |
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142 | ptr += c; |
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143 | //u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, 200, NULL); /* extra dely required */ |
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144 | } |
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145 | |
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146 | u8x8_cad_EndTransfer(u8x8); |
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147 | |
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148 | break; |
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149 | default: |
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150 | return 0; |
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151 | } |
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152 | return 1; |
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153 | } |
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154 | |
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155 | static const u8x8_display_info_t u8x8_st7920_192x32_display_info = |
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156 | { |
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157 | /* chip_enable_level = */ 1, |
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158 | /* chip_disable_level = */ 0, |
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159 | |
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160 | /* post_chip_enable_wait_ns = */ 5, |
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161 | /* pre_chip_disable_wait_ns = */ 5, |
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162 | /* reset_pulse_width_ms = */ 1, |
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163 | /* post_reset_wait_ms = */ 6, |
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164 | /* sda_setup_time_ns = */ 20, |
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165 | /* sck_pulse_width_ns = */ 140, /* datasheet ST7920 */ |
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166 | /* sck_clock_hz = */ 1000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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167 | /* spi_mode = */ 3, /* old: sck_takeover_edge, new: active high (bit 1), rising edge (bit 0), 18 Aug 16: changed from 1 to 3 which works for 101 */ |
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168 | /* Arduino mode 3: aktive low clock, but use rising edge */ |
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169 | /* i2c_bus_clock_100kHz = */ 4, |
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170 | /* data_setup_time_ns = */ 30, |
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171 | /* write_pulse_width_ns = */ 40, |
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172 | /* tile_width = */ 24, |
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173 | /* tile_hight = */ 4, |
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174 | /* default_x_offset = */ 0, |
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175 | /* flipmode_x_offset = */ 0, |
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176 | /* pixel_width = */ 192, |
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177 | /* pixel_height = */ 32 |
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178 | }; |
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179 | |
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180 | static const u8x8_display_info_t u8x8_st7920_128x64_display_info = |
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181 | { |
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182 | /* chip_enable_level = */ 1, |
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183 | /* chip_disable_level = */ 0, |
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184 | |
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185 | /* post_chip_enable_wait_ns = */ 5, |
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186 | /* pre_chip_disable_wait_ns = */ 5, |
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187 | /* reset_pulse_width_ms = */ 1, |
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188 | /* post_reset_wait_ms = */ 6, |
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189 | /* sda_setup_time_ns = */ 20, |
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190 | /* sck_pulse_width_ns = */ 140, /* datasheet ST7920 */ |
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191 | /* sck_clock_hz = */ 1000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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192 | /* ST7920+Due work with 1MHz but not with 2MHz, ST7920+Uno works with 2MHz */ |
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193 | /* spi_mode = */ 3, /* active high, rising edge, 18 Aug 16: changed from 1 to 3 which works for 101 */ |
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194 | /* in theory mode 3 should be correct */ |
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195 | /* i2c_bus_clock_100kHz = */ 4, |
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196 | /* data_setup_time_ns = */ 30, |
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197 | /* write_pulse_width_ns = */ 40, |
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198 | /* tile_width = */ 16, |
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199 | /* tile_hight = */ 8, |
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200 | /* default_x_offset = */ 0, |
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201 | /* flipmode_x_offset = */ 0, |
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202 | /* pixel_width = */ 128, |
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203 | /* pixel_height = */ 64 |
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204 | }; |
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205 | |
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206 | uint8_t u8x8_d_st7920_192x32(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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207 | { |
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208 | switch(msg) |
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209 | { |
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210 | case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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211 | u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st7920_192x32_display_info); |
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212 | break; |
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213 | default: |
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214 | return u8x8_d_st7920_common(u8x8, msg, arg_int, arg_ptr); |
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215 | } |
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216 | return 1; |
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217 | } |
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218 | |
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219 | uint8_t u8x8_d_st7920_128x64(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) |
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220 | { |
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221 | switch(msg) |
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222 | { |
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223 | case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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224 | u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st7920_128x64_display_info); |
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225 | break; |
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226 | default: |
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227 | return u8x8_d_st7920_common(u8x8, msg, arg_int, arg_ptr); |
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228 | } |
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229 | return 1; |
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230 | } |
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231 | |
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232 | |
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233 | |
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234 | |
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235 | |
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236 |