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331 | cascade | 1 | /**************************************************************************** |
2 | * Copyright (C) 2009 by Claas Anders "CaScAdE" Rathje * |
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3 | * admiralcascade@gmail.com * |
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4 | * Project-URL: http://www.mylifesucks.de/oss/c-osd/ * |
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5 | * * |
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6 | * This program is free software; you can redistribute it and/or modify * |
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7 | * it under the terms of the GNU General Public License as published by * |
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8 | * the Free Software Foundation; either version 2 of the License. * |
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9 | * * |
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10 | * This program is distributed in the hope that it will be useful, * |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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13 | * GNU General Public License for more details. * |
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14 | * * |
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15 | * You should have received a copy of the GNU General Public License * |
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16 | * along with this program; if not, write to the * |
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17 | * Free Software Foundation, Inc., * |
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18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
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19 | ****************************************************************************/ |
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20 | |||
346 | cascade | 21 | #include <avr/io.h> |
22 | #include <util/delay.h> |
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23 | #include <avr/pgmspace.h> |
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514 | cascade | 24 | #include "main.h" |
331 | cascade | 25 | #include "max7456_software_spi.h" |
26 | |||
27 | /* ########################################################################## |
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28 | * MAX7456 SPI & Display stuff |
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29 | * ##########################################################################*/ |
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30 | |||
31 | /** |
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32 | * Send a byte through SPI |
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33 | */ |
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34 | void spi_send(uint8_t byte) { |
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35 | for (int8_t i = 7; i >= 0; i--) { |
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36 | if (((byte >> i) & 1)) { |
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37 | MAX_SDIN_HIGH |
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38 | } else { |
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39 | MAX_SDIN_LOW |
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40 | } |
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41 | MAX_SCLK_HIGH |
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42 | MAX_SCLK_LOW |
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43 | } |
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44 | } |
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45 | |||
46 | /** |
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47 | * Send <byte> to <address> of MAX7456 |
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48 | */ |
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49 | void spi_send_byte(uint8_t address, uint8_t byte) { |
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50 | // start sending |
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51 | MAX_CS_LOW |
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52 | |||
53 | spi_send(address); |
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54 | spi_send(byte); |
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55 | |||
56 | // end sending |
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57 | MAX_CS_HIGH |
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58 | } |
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59 | |||
514 | cascade | 60 | |
331 | cascade | 61 | /** |
62 | * write a <character> to <address> of MAX7456 display memory |
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63 | */ |
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64 | void write_char(uint16_t address, char character) { |
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65 | spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH |
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66 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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67 | spi_send_byte(0x07, character); // DMDI |
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68 | } |
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69 | |||
514 | cascade | 70 | |
331 | cascade | 71 | /** |
514 | cascade | 72 | * clear display memory |
73 | * (also sets 8bit mode) |
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74 | */ |
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75 | void clear(void) { |
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76 | /*uint16_t memory_address = 0; |
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77 | for (unsigned int a = 0; a < 480; a++) { |
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78 | write_char(memory_address++, 0); |
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79 | }*/ |
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80 | // clear all display-mem (DMM) |
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81 | spi_send_byte(0x04, 0b01000100); |
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82 | |||
83 | // clearing takes 12uS according to maxim so lets wait longer |
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84 | _delay_us(20); |
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85 | } |
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86 | |||
87 | |||
88 | /** |
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89 | * for testing write all chars to screen |
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90 | */ |
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91 | void write_all_chars() { |
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92 | uint16_t x = 3, y = 2, t = 0; |
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93 | while (t < 256) { |
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94 | write_char(x++ + y*30, t++); |
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95 | if (x > 25) { |
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96 | y++; |
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97 | x = 3; |
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98 | } |
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99 | } |
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100 | } |
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101 | |||
102 | #if !(ALLCHARSDEBUG|(WRITECHARS != -1)) |
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103 | |||
104 | /** |
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331 | cascade | 105 | * write a character <attribute> to <address> of MAX7456 display memory |
106 | */ |
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107 | void write_char_att(uint16_t address, char attribute) { |
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108 | // the only important part is that the DMAH[1] is set |
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109 | // so we add 2 which binary is the 2nd lowest byte |
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110 | spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH |
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111 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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112 | spi_send_byte(0x07, attribute); // DMDI |
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113 | } |
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114 | |||
115 | /** |
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116 | * write a <character> at <x>/<y> to MAX7456 display memory |
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117 | */ |
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118 | void write_char_xy(uint8_t x, uint8_t y, char character) { |
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119 | uint16_t address = y * 30 + x; |
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120 | write_char(address, character); |
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121 | } |
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122 | |||
123 | /** |
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124 | * write a character <attribute> at <x>/<y> to MAX7456 display memory |
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125 | */ |
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126 | void write_char_att_xy(uint8_t x, uint8_t y, char attribute) { |
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127 | uint16_t address = y * 30 + x; |
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128 | write_char_att(address, attribute); |
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129 | } |
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130 | |||
131 | /** |
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514 | cascade | 132 | * let the MAX7456 learn a new character at <number> |
133 | * with <data>. |
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331 | cascade | 134 | */ |
514 | cascade | 135 | void learn_char(uint8_t number, unsigned char* data) { |
136 | // select character to write (CMAH) |
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137 | spi_send_byte(0x09, number); |
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404 | cascade | 138 | |
514 | cascade | 139 | for (uint8_t i = 0; i < 54; i++) { |
140 | // select 4pixel byte of char (CMAL) |
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141 | spi_send_byte(0x0A, i); |
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142 | |||
143 | // write 4pixel byte of char (CMDI) |
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144 | spi_send_byte(0x0B, data[i]); |
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145 | } |
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146 | |||
147 | // write to the NVM array from the shadow RAM (CMM) |
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148 | spi_send_byte(0x08, 0b10100000); |
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149 | |||
150 | // according to maxim writing to nvram takes about 12ms, lets wait longer |
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151 | _delay_ms(120); |
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331 | cascade | 152 | } |
153 | |||
154 | /** |
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155 | * write an ascii <character> to <address> of MAX7456 display memory |
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156 | */ |
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157 | void write_ascii_char(uint16_t address, char c) { |
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158 | if (c == 32) c = 0; // remap space |
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159 | else if (c > 48 && c <= 57) c -= 48; // remap numbers |
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160 | else if (c == '0') c = 10; // remap zero |
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161 | else if (c >= 65 && c <= 90) c -= 54; // remap big letters |
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162 | else if (c >= 97 && c <= 122) c -= 60; // remap small letters |
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163 | else if (c == '(') c = 63; // remap |
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164 | else if (c == ')') c = 64; // remap |
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165 | else if (c == '.') c = 65; // remap |
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166 | else if (c == '?') c = 66; // remap |
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167 | else if (c == ';') c = 67; // remap |
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168 | else if (c == ':') c = 68; // remap |
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169 | else if (c == ',') c = 69; // remap |
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170 | else if (c == '\'') c = 70; // remap |
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171 | else if (c == '/') c = 71; // remap |
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172 | else if (c == '"') c = 72; // remap |
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173 | else if (c == '-') c = 73; // remap minus |
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174 | else if (c == '<') c = 74; // remap |
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175 | else if (c == '>') c = 75; // remap |
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176 | else if (c == '@') c = 76; // remap |
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177 | write_char(address, c); |
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178 | } |
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179 | |||
180 | /** |
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181 | * write an ascii <string> at <x>/<y> to MAX7456 display memory |
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182 | */ |
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183 | void write_ascii_string(uint8_t x, uint8_t y, char *string) { |
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184 | while (*string) { |
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185 | write_ascii_char(((x++)+(y * 30)), *string); |
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186 | string++; |
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187 | } |
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188 | } |
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189 | |||
190 | /** |
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346 | cascade | 191 | * write an ascii <string> from progmen at <x>/<y> to MAX7456 display memory |
192 | */ |
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489 | woggle | 193 | void write_ascii_string_pgm(uint8_t x, uint8_t y, const char *string) { |
346 | cascade | 194 | while (pgm_read_byte(string) != 0x00) |
195 | write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++)); |
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196 | } |
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197 | |||
198 | /** |
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379 | cascade | 199 | * write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory |
200 | */ |
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489 | woggle | 201 | void write_string_pgm_down(uint8_t x, uint8_t y, const char *string, uint8_t length) { |
379 | cascade | 202 | while (length--) |
203 | write_char((x+(y++ * 30)), pgm_read_byte(string++)); |
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204 | } |
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205 | |||
206 | /** |
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349 | cascade | 207 | * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory |
208 | * <num> represents the largest multiple of 10 that will still be displayable as |
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209 | * the first digit, so num = 10 will be 0-99 and so on |
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210 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
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331 | cascade | 211 | */ |
349 | cascade | 212 | void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t num, uint8_t pad) { |
213 | // if number is largar than 99[..]9 we must decrease it |
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214 | while (number >= (num * 10)) { |
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215 | number -= num * 10; |
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216 | } |
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331 | cascade | 217 | |
349 | cascade | 218 | uint8_t started = 0; |
331 | cascade | 219 | |
349 | cascade | 220 | while (num > 0) { |
221 | uint8_t b = number / num; |
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222 | if (b > 0 || started || num == 1) { |
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223 | write_ascii_char((x++)+(y * 30), '0' + b); |
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224 | started = 1; |
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225 | } else { |
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226 | if (pad) write_ascii_char((x++)+(y * 30), '0'); |
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227 | else write_ascii_char((x++)+(y * 30), 0); |
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228 | } |
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229 | number -= b * num; |
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230 | |||
231 | num /= 10; |
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232 | } |
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331 | cascade | 233 | } |
234 | |||
235 | /** |
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349 | cascade | 236 | * Write only some digits of a signed <number> at <x>/<y> to MAX7456 display memory |
237 | * <num> represents the largest multiple of 10 that will still be displayable as |
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238 | * the first digit, so num = 10 will be 0-99 and so on |
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239 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
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331 | cascade | 240 | */ |
349 | cascade | 241 | void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t num, uint8_t pad) { |
242 | if (((uint16_t) number) > 32767) { |
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243 | number = number - 65536; |
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244 | num *= -1; |
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331 | cascade | 245 | |
349 | cascade | 246 | // if number is smaller than -99[..]9 we must increase it |
247 | while (number <= (num * 10)) { |
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248 | number -= num * 10; |
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249 | } |
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331 | cascade | 250 | |
349 | cascade | 251 | uint8_t started = 0; |
331 | cascade | 252 | |
349 | cascade | 253 | while (num < 0) { |
254 | uint8_t b = number / num; |
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255 | if (pad) write_ascii_char((x)+(y * 30), '0'); |
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256 | if (b > 0 || started || num == 1) { |
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257 | if (!started) write_char((x - 1)+(y * 30), 0x49); |
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258 | write_ascii_char((x++)+(y * 30), '0' + b); |
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259 | started = 1; |
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260 | } else { |
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261 | write_ascii_char((x++)+(y * 30), 0); |
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262 | } |
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263 | number -= b * num; |
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331 | cascade | 264 | |
349 | cascade | 265 | num /= 10; |
266 | } |
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267 | } else { |
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268 | write_char((x)+(y * 30), 0); |
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269 | write_ndigit_number_u(x, y, number, num, pad); |
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331 | cascade | 270 | } |
271 | } |
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272 | |||
273 | /** |
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349 | cascade | 274 | * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory |
275 | * as /10th of the value |
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276 | * <num> represents the largest multiple of 10 that will still be displayable as |
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277 | * the first digit, so num = 10 will be 0-99 and so on |
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278 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
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331 | cascade | 279 | */ |
349 | cascade | 280 | void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t num, uint8_t pad) { |
281 | // if number is largar than 99[..]9 we must decrease it |
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282 | while (number >= (num * 10)) { |
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283 | number -= num * 10; |
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284 | } |
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285 | |||
331 | cascade | 286 | |
349 | cascade | 287 | uint8_t started = 0; |
288 | while (num > 0) { |
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289 | uint8_t b = number / num; |
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290 | if (b > 0 || started || num == 1) { |
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291 | if ((num / 10) == 0) { |
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292 | if (!started) write_ascii_char((x - 1)+(y * 30), '0'); |
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293 | write_char((x++)+(y * 30), 65); // decimal point |
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294 | } |
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295 | write_ascii_char((x++)+(y * 30), '0' + b); |
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296 | started = 1; |
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297 | } else { |
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298 | if (pad) write_ascii_char((x++)+(y * 30), '0'); |
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299 | else write_ascii_char((x++)+(y * 30), ' '); |
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300 | } |
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301 | number -= b * num; |
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331 | cascade | 302 | |
349 | cascade | 303 | num /= 10; |
304 | } |
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331 | cascade | 305 | } |
306 | |||
307 | /** |
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349 | cascade | 308 | * Write only some digits of a signed <number> at <x>/<y> to MAX7456 display memory |
309 | * as /10th of the value |
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310 | * <num> represents the largest multiple of 10 that will still be displayable as |
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311 | * the first digit, so num = 10 will be 0-99 and so on |
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312 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
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331 | cascade | 313 | */ |
349 | cascade | 314 | void write_ndigit_number_s_10th(uint8_t x, uint8_t y, int16_t number, int16_t num, uint8_t pad) { |
315 | if (((uint16_t) number) > 32767) { |
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316 | number = number - 65536; |
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317 | num *= -1; |
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331 | cascade | 318 | |
349 | cascade | 319 | // if number is smaller than -99[..]9 we must increase it |
320 | while (number <= (num * 10)) { |
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321 | number -= num * 10; |
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322 | } |
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331 | cascade | 323 | |
349 | cascade | 324 | uint8_t started = 0; |
331 | cascade | 325 | |
349 | cascade | 326 | while (num < 0) { |
327 | uint8_t b = number / num; |
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328 | if (pad) write_ascii_char((x)+(y * 30), '0'); |
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329 | if (b > 0 || started || num == 1) { |
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330 | if ((num / 10) == 0) { |
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331 | if (!started) { |
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332 | write_ascii_char((x - 2)+(y * 30), '-'); |
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333 | write_ascii_char((x - 1)+(y * 30), '0'); |
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334 | } |
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335 | write_char((x++)+(y * 30), 65); // decimal point |
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336 | } else if (!started) { |
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337 | write_char((x - 1)+(y * 30), 0x49); // minus |
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338 | } |
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339 | write_ascii_char((x++)+(y * 30), '0' + b); |
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340 | started = 1; |
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341 | } else { |
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342 | write_ascii_char((x++)+(y * 30), 0); |
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343 | } |
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344 | number -= b * num; |
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345 | |||
346 | num /= 10; |
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347 | } |
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348 | } else { |
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331 | cascade | 349 | write_char((x)+(y * 30), 0); |
349 | cascade | 350 | write_ndigit_number_u_10th(x, y, number, num, pad); |
331 | cascade | 351 | } |
352 | } |
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353 | |||
354 | /** |
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355 | * write <seconds> as human readable time at <x>/<y> to MAX7456 display mem |
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356 | */ |
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357 | void write_time(uint8_t x, uint8_t y, uint16_t seconds) { |
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358 | uint16_t min = seconds / 60; |
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359 | seconds -= min * 60; |
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349 | cascade | 360 | write_ndigit_number_u(x, y, min, 100, 0); |
331 | cascade | 361 | write_char_xy(x + 3, y, 68); |
349 | cascade | 362 | write_ndigit_number_u(x + 4, y, seconds, 10, 1); |
331 | cascade | 363 | } |
364 | |||
365 | /** |
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412 | cascade | 366 | * wirte a <position> at <x>/<y> assuming it is a gps position for long-/latitude |
367 | */ |
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368 | void write_gps_pos(uint8_t x, uint8_t y, int32_t position) { |
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489 | woggle | 369 | if (position < 0) { |
370 | position ^= ~0; |
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431 | cascade | 371 | position++; |
412 | cascade | 372 | write_char_xy(x++, y, 0x49); // minus |
373 | } else { |
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374 | write_char_xy(x++, y, 0); // clear ('+' would be nice, maybe later) |
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375 | } |
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376 | write_ndigit_number_u(x, y, (uint16_t) (position / (int32_t) 10000000), 100, 1); |
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377 | write_char_xy(x + 3, y, 65); // decimal point |
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378 | position = position - ((position / (int32_t) 10000000) * (int32_t) 10000000); |
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379 | write_ndigit_number_u(x + 4, y, (uint16_t) (position / (int32_t) 1000), 1000, 1); |
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380 | position = position - ((uint16_t) (position / (int32_t) 1000) * (int32_t) 1000); |
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381 | write_ndigit_number_u(x + 8, y, (uint16_t) position, 100, 1); |
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382 | write_char_xy(x + 11, y, 0xD0); // degree symbol |
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383 | } |
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514 | cascade | 384 | |
385 | #endif |