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331 | cascade | 1 | /**************************************************************************** |
728 | cascade | 2 | * Copyright (C) 2009-2010 by Claas Anders "CaScAdE" Rathje * |
331 | cascade | 3 | * admiralcascade@gmail.com * |
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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519 | cascade | 24 | #include <string.h> |
25 | #include <stdlib.h> |
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514 | cascade | 26 | #include "main.h" |
331 | cascade | 27 | #include "max7456_software_spi.h" |
28 | |||
736 | cascade | 29 | |
30 | char conv_array[7]; // general array for number -> char conversation |
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31 | |||
331 | cascade | 32 | /* ########################################################################## |
33 | * MAX7456 SPI & Display stuff |
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34 | * ##########################################################################*/ |
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35 | |||
36 | /** |
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37 | * Send a byte through SPI |
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519 | cascade | 38 | * inline because it increases the codesize currenlty 'only' by 110byte but saves |
39 | * the context-change on every char and attribute which is at least done twice |
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40 | * (address and data byte), a significant speed-bost we do not want to miss :) |
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331 | cascade | 41 | */ |
519 | cascade | 42 | inline void spi_send(uint8_t byte) { |
331 | cascade | 43 | for (int8_t i = 7; i >= 0; i--) { |
44 | if (((byte >> i) & 1)) { |
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45 | MAX_SDIN_HIGH |
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46 | } else { |
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47 | MAX_SDIN_LOW |
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48 | } |
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49 | MAX_SCLK_HIGH |
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50 | MAX_SCLK_LOW |
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51 | } |
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52 | } |
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53 | |||
54 | /** |
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55 | * Send <byte> to <address> of MAX7456 |
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56 | */ |
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57 | void spi_send_byte(uint8_t address, uint8_t byte) { |
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58 | // start sending |
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59 | MAX_CS_LOW |
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60 | |||
61 | spi_send(address); |
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62 | spi_send(byte); |
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63 | |||
64 | // end sending |
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65 | MAX_CS_HIGH |
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66 | } |
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67 | |||
68 | /** |
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69 | * write a <character> to <address> of MAX7456 display memory |
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70 | */ |
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71 | void write_char(uint16_t address, char character) { |
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72 | spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH |
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73 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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74 | spi_send_byte(0x07, character); // DMDI |
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75 | } |
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76 | |||
77 | /** |
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514 | cascade | 78 | * clear display memory |
79 | * (also sets 8bit mode) |
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80 | */ |
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81 | void clear(void) { |
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82 | /*uint16_t memory_address = 0; |
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83 | for (unsigned int a = 0; a < 480; a++) { |
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84 | write_char(memory_address++, 0); |
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85 | }*/ |
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761 | - | 86 | // clear all display-mem (DMM) |
514 | cascade | 87 | spi_send_byte(0x04, 0b01000100); |
88 | |||
89 | // clearing takes 12uS according to maxim so lets wait longer |
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90 | _delay_us(20); |
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91 | } |
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92 | |||
93 | |||
736 | cascade | 94 | #if (ALLCHARSDEBUG|(WRITECHARS != -1)) |
761 | - | 95 | |
514 | cascade | 96 | /** |
97 | * for testing write all chars to screen |
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98 | */ |
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99 | void write_all_chars() { |
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100 | uint16_t x = 3, y = 2, t = 0; |
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101 | while (t < 256) { |
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761 | - | 102 | write_char(x++ + y * 30, t++); |
514 | cascade | 103 | if (x > 25) { |
104 | y++; |
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105 | x = 3; |
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106 | } |
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107 | } |
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108 | } |
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109 | |||
736 | cascade | 110 | /** |
111 | * let the MAX7456 learn a new character at <number> |
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112 | * with <data>. |
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113 | */ |
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114 | void learn_char(uint8_t number, unsigned char* data) { |
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115 | // select character to write (CMAH) |
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116 | spi_send_byte(0x09, number); |
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117 | |||
118 | for (uint8_t i = 0; i < 54; i++) { |
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119 | // select 4pixel byte of char (CMAL) |
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120 | spi_send_byte(0x0A, i); |
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121 | |||
122 | // write 4pixel byte of char (CMDI) |
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123 | spi_send_byte(0x0B, data[i]); |
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124 | } |
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125 | |||
126 | // write to the NVM array from the shadow RAM (CMM) |
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127 | spi_send_byte(0x08, 0b10100000); |
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128 | |||
129 | // according to maxim writing to nvram takes about 12ms, lets wait longer |
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130 | _delay_ms(120); |
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131 | } |
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132 | #endif |
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133 | |||
514 | cascade | 134 | #if !(ALLCHARSDEBUG|(WRITECHARS != -1)) |
135 | |||
136 | /** |
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331 | cascade | 137 | * write a character <attribute> to <address> of MAX7456 display memory |
138 | */ |
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139 | void write_char_att(uint16_t address, char attribute) { |
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140 | // the only important part is that the DMAH[1] is set |
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141 | // so we add 2 which binary is the 2nd lowest byte |
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142 | spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH |
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143 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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144 | spi_send_byte(0x07, attribute); // DMDI |
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145 | } |
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146 | |||
147 | /** |
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148 | * write a <character> at <x>/<y> to MAX7456 display memory |
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149 | */ |
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150 | void write_char_xy(uint8_t x, uint8_t y, char character) { |
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151 | uint16_t address = y * 30 + x; |
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152 | write_char(address, character); |
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153 | } |
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154 | |||
155 | /** |
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156 | * write a character <attribute> at <x>/<y> to MAX7456 display memory |
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157 | */ |
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158 | void write_char_att_xy(uint8_t x, uint8_t y, char attribute) { |
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159 | uint16_t address = y * 30 + x; |
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160 | write_char_att(address, attribute); |
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161 | } |
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162 | |||
163 | /** |
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164 | * write an ascii <character> to <address> of MAX7456 display memory |
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165 | */ |
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166 | void write_ascii_char(uint16_t address, char c) { |
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167 | if (c == 32) c = 0; // remap space |
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168 | else if (c > 48 && c <= 57) c -= 48; // remap numbers |
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169 | else if (c == '0') c = 10; // remap zero |
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170 | else if (c >= 65 && c <= 90) c -= 54; // remap big letters |
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171 | else if (c >= 97 && c <= 122) c -= 60; // remap small letters |
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172 | else if (c == '(') c = 63; // remap |
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173 | else if (c == ')') c = 64; // remap |
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174 | else if (c == '.') c = 65; // remap |
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736 | cascade | 175 | else if (c == '-') c = 73; // remap minus |
331 | cascade | 176 | else if (c == ';') c = 67; // remap |
177 | else if (c == ':') c = 68; // remap |
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178 | else if (c == ',') c = 69; // remap |
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761 | - | 179 | // else if (c == '?') c = 66; // remap |
180 | // else if (c == '\'') c = 70; // remap |
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757 | cascade | 181 | else if (c == '/') c = 71; // remap |
761 | - | 182 | // else if (c == '"') c = 72; // remap |
183 | // else if (c == '<') c = 74; // remap |
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184 | // else if (c == '>') c = 75; // remap |
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185 | // else if (c == '@') c = 76; // remap |
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331 | cascade | 186 | write_char(address, c); |
187 | } |
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188 | |||
189 | /** |
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190 | * write an ascii <string> at <x>/<y> to MAX7456 display memory |
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191 | */ |
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192 | void write_ascii_string(uint8_t x, uint8_t y, char *string) { |
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193 | while (*string) { |
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194 | write_ascii_char(((x++)+(y * 30)), *string); |
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195 | string++; |
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196 | } |
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197 | } |
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198 | |||
199 | /** |
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346 | cascade | 200 | * write an ascii <string> from progmen at <x>/<y> to MAX7456 display memory |
201 | */ |
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489 | woggle | 202 | void write_ascii_string_pgm(uint8_t x, uint8_t y, const char *string) { |
761 | - | 203 | while (pgm_read_byte(string) != 0x00) |
204 | write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++)); |
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346 | cascade | 205 | } |
206 | |||
207 | /** |
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379 | cascade | 208 | * write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory |
209 | */ |
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489 | woggle | 210 | void write_string_pgm_down(uint8_t x, uint8_t y, const char *string, uint8_t length) { |
761 | - | 211 | while (length--) |
212 | write_char((x + (y++ * 30)), pgm_read_byte(string++)); |
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379 | cascade | 213 | } |
214 | |||
215 | /** |
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519 | cascade | 216 | * Write a unsigned <number> at <x>/<y> to MAX7456 display memory |
217 | * <length> represents the length to rightbound the number |
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349 | cascade | 218 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
331 | cascade | 219 | */ |
519 | cascade | 220 | void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) { |
761 | - | 221 | itoa(number, conv_array, 10); |
222 | for (uint8_t i = 0; i < length - strlen(conv_array); i++) { |
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223 | if (pad) write_char((x++)+(y * 30), 10); |
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224 | else write_ascii_char((x++)+(y * 30), 0); |
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225 | } |
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226 | write_ascii_string(x, y, conv_array); |
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331 | cascade | 227 | } |
228 | |||
229 | /** |
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519 | cascade | 230 | * Write a signed <number> at <x>/<y> to MAX7456 display memory |
231 | * <length> represents the length to rightbound the number |
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349 | cascade | 232 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
331 | cascade | 233 | */ |
519 | cascade | 234 | void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) { |
761 | - | 235 | itoa(number, conv_array, 10); |
236 | for (uint8_t i = 0; i < length - strlen(conv_array); i++) { |
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237 | if (pad) write_char((x++)+(y * 30), 10); |
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238 | else write_ascii_char((x++)+(y * 30), 0); |
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239 | } |
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240 | write_ascii_string(x, y, conv_array); |
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331 | cascade | 241 | } |
242 | |||
243 | /** |
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519 | cascade | 244 | * Write a unsigned <number> at <x>/<y> to MAX7456 display memory as /10th of value |
245 | * <length> represents the length to rightbound the number |
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349 | cascade | 246 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
331 | cascade | 247 | */ |
519 | cascade | 248 | void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) { |
761 | - | 249 | itoa(number, conv_array, 10); |
250 | uint8_t len = strlen(conv_array); |
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251 | for (uint8_t i = 0; i < length - len; i++) { |
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252 | if (pad) write_char((x++)+(y * 30), 10); // zero |
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253 | else write_char((x++)+(y * 30), 0); // blank |
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254 | } |
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255 | char rest = conv_array[len - 1]; |
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256 | conv_array[len - 1] = 0; |
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257 | if (len == 1) { |
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258 | write_char((x - 1)+(y * 30), 10); // zero |
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259 | } else if (len == 2 && conv_array[0] == '-') { |
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260 | write_char((x - 1)+(y * 30), 0x49); // minus |
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261 | write_char((x)+(y * 30), 10); // zero |
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262 | } else { |
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263 | write_ascii_string(x, y, conv_array); |
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264 | } |
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265 | x += len - 1; |
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266 | write_char((x++)+(y * 30), 65); // decimal point |
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267 | write_ascii_char((x++)+(y * 30), rest); // after dot |
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331 | cascade | 268 | } |
269 | |||
270 | /** |
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519 | cascade | 271 | * Write a signed <number> at <x>/<y> to MAX7456 display memory as /10th of value |
272 | * <length> represents the length to rightbound the number |
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349 | cascade | 273 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
331 | cascade | 274 | */ |
519 | cascade | 275 | void write_ndigit_number_s_10th(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) { |
761 | - | 276 | itoa(number, conv_array, 10); |
277 | uint8_t len = strlen(conv_array); |
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278 | for (uint8_t i = 0; i < length - len; i++) { |
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279 | if (pad) write_char((x++)+(y * 30), 10); // zero |
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280 | else write_char((x++)+(y * 30), 0); // blank |
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281 | } |
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282 | char rest = conv_array[len - 1]; |
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283 | conv_array[len - 1] = 0; |
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284 | if (len == 1) { |
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285 | write_char((x - 1)+(y * 30), 10); // zero |
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286 | } else if (len == 2 && conv_array[0] == '-') { |
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287 | write_char((x - 1)+(y * 30), 0x49); // minus |
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288 | write_char((x)+(y * 30), 10); // zero |
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289 | } else { |
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290 | write_ascii_string(x, y, conv_array); |
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291 | } |
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292 | x += len - 1; |
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293 | write_char((x++)+(y * 30), 65); // decimal point |
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294 | write_ascii_char((x++)+(y * 30), rest); // after dot |
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331 | cascade | 295 | } |
296 | |||
297 | /** |
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298 | * write <seconds> as human readable time at <x>/<y> to MAX7456 display mem |
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299 | */ |
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300 | void write_time(uint8_t x, uint8_t y, uint16_t seconds) { |
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301 | uint16_t min = seconds / 60; |
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302 | seconds -= min * 60; |
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519 | cascade | 303 | write_ndigit_number_u(x, y, min, 3, 0); |
331 | cascade | 304 | write_char_xy(x + 3, y, 68); |
519 | cascade | 305 | write_ndigit_number_u(x + 4, y, seconds, 2, 1); |
331 | cascade | 306 | } |
307 | |||
308 | /** |
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412 | cascade | 309 | * wirte a <position> at <x>/<y> assuming it is a gps position for long-/latitude |
310 | */ |
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311 | void write_gps_pos(uint8_t x, uint8_t y, int32_t position) { |
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761 | - | 312 | if (position < 0) { |
313 | position ^= ~0; |
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314 | position++; |
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315 | write_char_xy(x++, y, 0x49); // minus |
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316 | } else { |
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317 | write_char_xy(x++, y, 0); // clear ('+' would be nice, maybe later) |
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318 | } |
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319 | write_ndigit_number_u(x, y, (uint16_t)(position / (int32_t)10000000), 3, 1); |
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320 | write_char_xy(x + 3, y, 65); // decimal point |
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321 | position = position - ((position / (int32_t)10000000) * (int32_t)10000000); |
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322 | write_ndigit_number_u(x + 4, y, (uint16_t)(position / (int32_t)1000), 4, 1); |
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323 | position = position - ((uint16_t)(position / (int32_t)1000) * (int32_t)1000); |
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324 | write_ndigit_number_u(x + 8, y, (uint16_t)position, 3, 1); |
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325 | write_char_xy(x + 11, y, 0xD0); // degree symbol |
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412 | cascade | 326 | } |
514 | cascade | 327 | |
328 | #endif |