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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Initial import of the CO2 meter application.
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1 | /* |
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2 | |
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3 | u8x8_string.c |
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4 | |
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5 | string line procedures |
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6 | |
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7 | Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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8 | |
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9 | Copyright (c) 2016, olikraus@gmail.com |
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10 | All rights reserved. |
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11 | |
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12 | Redistribution and use in source and binary forms, with or without modification, |
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13 | are permitted provided that the following conditions are met: |
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14 | |
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15 | * Redistributions of source code must retain the above copyright notice, this list |
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16 | of conditions and the following disclaimer. |
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17 | |
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18 | * Redistributions in binary form must reproduce the above copyright notice, this |
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19 | list of conditions and the following disclaimer in the documentation and/or other |
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20 | materials provided with the distribution. |
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21 | |
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22 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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23 | CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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24 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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25 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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26 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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27 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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28 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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29 | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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30 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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31 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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32 | STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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33 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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34 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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35 | |
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36 | */ |
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37 | |
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38 | #include "u8x8.h" |
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39 | |
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40 | uint8_t u8x8_GetStringLineCnt(const char *str) |
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41 | { |
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42 | char e; |
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43 | uint8_t line_cnt = 1; |
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44 | if ( str == NULL ) |
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45 | return 0; |
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46 | for(;;) |
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47 | { |
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48 | e = *str; |
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49 | if ( e == '\0' ) |
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50 | break; |
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51 | str++; |
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52 | if ( e == '\n' ) |
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53 | line_cnt++; |
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54 | } |
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55 | return line_cnt; |
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56 | } |
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57 | |
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58 | |
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59 | /* |
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60 | Assumes strings, separated by '\n' in "str". |
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61 | Returns the string at index "line_idx". First strng has line_idx = 0 |
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62 | Example: |
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63 | Returns "xyz" for line_idx = 1 with str = "abc\nxyz" |
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64 | Support both UTF8 and normal strings. |
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65 | */ |
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66 | const char *u8x8_GetStringLineStart(uint8_t line_idx, const char *str ) |
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67 | { |
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68 | char e; |
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69 | uint8_t line_cnt = 1; |
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70 | |
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71 | if ( line_idx == 0 ) |
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72 | return str; |
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73 | |
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74 | for(;;) |
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75 | { |
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76 | e = *str; |
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77 | if ( e == '\0' ) |
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78 | break; |
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79 | str++; |
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80 | if ( e == '\n' ) |
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81 | { |
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82 | if ( line_cnt == line_idx ) |
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83 | return str; |
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84 | line_cnt++; |
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85 | } |
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86 | } |
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87 | return NULL; /* line not found */ |
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88 | } |
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89 | |
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90 | /* copy until first '\n' or '\0' in str */ |
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91 | /* Important: There is no string overflow check, ensure */ |
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92 | /* that the destination buffer is large enough */ |
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93 | void u8x8_CopyStringLine(char *dest, uint8_t line_idx, const char *str) |
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94 | { |
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95 | if ( dest == NULL ) |
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96 | return; |
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97 | str = u8x8_GetStringLineStart( line_idx, str ); |
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98 | if ( str != NULL ) |
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99 | { |
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100 | for(;;) |
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101 | { |
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102 | if ( *str == '\n' || *str == '\0' ) |
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103 | break; |
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104 | *dest = *str; |
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105 | dest++; |
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106 | str++; |
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107 | } |
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108 | } |
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109 | *dest = '\0'; |
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110 | } |
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111 | |
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112 | /* |
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113 | Draw a string |
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114 | Extend the string to size "w" |
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115 | Center the string within "w" |
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116 | return the size of the string |
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117 | |
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118 | */ |
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119 | uint8_t u8x8_DrawUTF8Line(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t w, const char *s) |
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120 | { |
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121 | uint8_t d, lw; |
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122 | uint8_t cx, dx; |
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123 | |
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124 | d = 0; |
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125 | |
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126 | lw = u8x8_GetUTF8Len(u8x8, s); |
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127 | if ( lw < w ) |
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128 | { |
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129 | d = w; |
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130 | d -=lw; |
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131 | d /= 2; |
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132 | } |
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133 | |
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134 | cx = x; |
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135 | dx = cx + d; |
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136 | while( cx < dx ) |
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137 | { |
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138 | u8x8_DrawUTF8(u8x8, cx, y, " "); |
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139 | cx++; |
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140 | } |
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141 | cx += u8x8_DrawUTF8(u8x8, cx, y, s); |
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142 | dx = x + w; |
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143 | while( cx < dx ) |
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144 | { |
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145 | u8x8_DrawUTF8(u8x8, cx, y, " "); |
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146 | cx++; |
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147 | } |
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148 | cx -= x; |
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149 | return cx; |
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150 | } |
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151 | |
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152 | /* |
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153 | draw several lines at position x,y. |
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154 | lines are stored in s and must be separated with '\n'. |
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155 | lines can be centered with respect to "w" |
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156 | if s == NULL nothing is drawn and 0 is returned |
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157 | returns the number of lines in s |
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158 | */ |
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159 | uint8_t u8x8_DrawUTF8Lines(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t w, const char *s) |
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160 | { |
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161 | uint8_t i; |
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162 | uint8_t cnt; |
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163 | cnt = u8x8_GetStringLineCnt(s); |
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164 | for( i = 0; i < cnt; i++ ) |
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165 | { |
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166 | u8x8_DrawUTF8Line(u8x8, x, y, w, u8x8_GetStringLineStart(i, s)); |
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167 | y++; |
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168 | } |
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169 | return cnt; |
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170 | } |