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| Rev | Author | Line No. | Line |
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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 | |||
| 800 | - | 21 | #include "main.h" |
| 346 | cascade | 22 | #include <avr/io.h> |
| 23 | #include <util/delay.h> |
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| 24 | #include <avr/pgmspace.h> |
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| 519 | cascade | 25 | #include <string.h> |
| 26 | #include <stdlib.h> |
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| 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 | |||
| 800 | - | 32 | int pow(int a, int b) { |
| 33 | if (b <= 0) return 1; |
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| 34 | int res = 1; |
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| 35 | while (b-- > 0) res *= a; |
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| 36 | return res; |
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| 37 | } |
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| 38 | |||
| 331 | cascade | 39 | /* ########################################################################## |
| 40 | * MAX7456 SPI & Display stuff |
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| 41 | * ##########################################################################*/ |
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| 42 | |||
| 43 | /** |
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| 44 | * Send a byte through SPI |
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| 519 | cascade | 45 | * inline because it increases the codesize currenlty 'only' by 110byte but saves |
| 46 | * the context-change on every char and attribute which is at least done twice |
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| 47 | * (address and data byte), a significant speed-bost we do not want to miss :) |
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| 331 | cascade | 48 | */ |
| 519 | cascade | 49 | inline void spi_send(uint8_t byte) { |
| 331 | cascade | 50 | for (int8_t i = 7; i >= 0; i--) { |
| 51 | if (((byte >> i) & 1)) { |
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| 52 | MAX_SDIN_HIGH |
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| 53 | } else { |
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| 54 | MAX_SDIN_LOW |
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| 55 | } |
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| 56 | MAX_SCLK_HIGH |
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| 57 | MAX_SCLK_LOW |
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| 58 | } |
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| 59 | } |
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| 60 | |||
| 61 | /** |
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| 62 | * Send <byte> to <address> of MAX7456 |
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| 63 | */ |
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| 64 | void spi_send_byte(uint8_t address, uint8_t byte) { |
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| 65 | // start sending |
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| 66 | MAX_CS_LOW |
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| 67 | |||
| 68 | spi_send(address); |
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| 69 | spi_send(byte); |
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| 70 | |||
| 71 | // end sending |
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| 72 | MAX_CS_HIGH |
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| 73 | } |
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| 74 | |||
| 75 | /** |
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| 76 | * write a <character> to <address> of MAX7456 display memory |
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| 77 | */ |
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| 78 | void write_char(uint16_t address, char character) { |
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| 79 | spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH |
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| 80 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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| 81 | spi_send_byte(0x07, character); // DMDI |
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| 82 | } |
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| 83 | |||
| 84 | /** |
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| 514 | cascade | 85 | * clear display memory |
| 86 | * (also sets 8bit mode) |
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| 87 | */ |
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| 88 | void clear(void) { |
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| 89 | /*uint16_t memory_address = 0; |
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| 90 | for (unsigned int a = 0; a < 480; a++) { |
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| 91 | write_char(memory_address++, 0); |
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| 92 | }*/ |
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| 761 | - | 93 | // clear all display-mem (DMM) |
| 514 | cascade | 94 | spi_send_byte(0x04, 0b01000100); |
| 95 | |||
| 96 | // clearing takes 12uS according to maxim so lets wait longer |
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| 97 | _delay_us(20); |
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| 98 | } |
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| 99 | |||
| 100 | |||
| 736 | cascade | 101 | #if (ALLCHARSDEBUG|(WRITECHARS != -1)) |
| 761 | - | 102 | |
| 514 | cascade | 103 | /** |
| 104 | * for testing write all chars to screen |
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| 105 | */ |
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| 106 | void write_all_chars() { |
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| 107 | uint16_t x = 3, y = 2, t = 0; |
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| 108 | while (t < 256) { |
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| 761 | - | 109 | write_char(x++ + y * 30, t++); |
| 514 | cascade | 110 | if (x > 25) { |
| 111 | y++; |
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| 112 | x = 3; |
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| 113 | } |
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| 114 | } |
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| 115 | } |
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| 116 | |||
| 736 | cascade | 117 | /** |
| 118 | * let the MAX7456 learn a new character at <number> |
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| 119 | * with <data>. |
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| 120 | */ |
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| 121 | void learn_char(uint8_t number, unsigned char* data) { |
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| 122 | // select character to write (CMAH) |
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| 123 | spi_send_byte(0x09, number); |
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| 124 | |||
| 125 | for (uint8_t i = 0; i < 54; i++) { |
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| 126 | // select 4pixel byte of char (CMAL) |
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| 127 | spi_send_byte(0x0A, i); |
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| 128 | |||
| 129 | // write 4pixel byte of char (CMDI) |
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| 130 | spi_send_byte(0x0B, data[i]); |
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| 131 | } |
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| 132 | |||
| 133 | // write to the NVM array from the shadow RAM (CMM) |
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| 134 | spi_send_byte(0x08, 0b10100000); |
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| 135 | |||
| 136 | // according to maxim writing to nvram takes about 12ms, lets wait longer |
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| 137 | _delay_ms(120); |
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| 138 | } |
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| 139 | #endif |
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| 140 | |||
| 514 | cascade | 141 | #if !(ALLCHARSDEBUG|(WRITECHARS != -1)) |
| 142 | |||
| 143 | /** |
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| 331 | cascade | 144 | * write a character <attribute> to <address> of MAX7456 display memory |
| 145 | */ |
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| 146 | void write_char_att(uint16_t address, char attribute) { |
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| 147 | // the only important part is that the DMAH[1] is set |
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| 148 | // so we add 2 which binary is the 2nd lowest byte |
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| 149 | spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH |
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| 150 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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| 151 | spi_send_byte(0x07, attribute); // DMDI |
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| 152 | } |
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| 153 | |||
| 154 | /** |
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| 155 | * write a <character> at <x>/<y> to MAX7456 display memory |
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| 156 | */ |
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| 157 | void write_char_xy(uint8_t x, uint8_t y, char character) { |
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| 158 | uint16_t address = y * 30 + x; |
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| 159 | write_char(address, character); |
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| 160 | } |
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| 161 | |||
| 162 | /** |
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| 163 | * write a character <attribute> at <x>/<y> to MAX7456 display memory |
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| 164 | */ |
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| 165 | void write_char_att_xy(uint8_t x, uint8_t y, char attribute) { |
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| 166 | uint16_t address = y * 30 + x; |
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| 167 | write_char_att(address, attribute); |
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| 168 | } |
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| 169 | |||
| 170 | /** |
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| 171 | * write an ascii <character> to <address> of MAX7456 display memory |
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| 172 | */ |
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| 173 | void write_ascii_char(uint16_t address, char c) { |
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| 174 | if (c == 32) c = 0; // remap space |
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| 175 | else if (c > 48 && c <= 57) c -= 48; // remap numbers |
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| 176 | else if (c == '0') c = 10; // remap zero |
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| 177 | else if (c >= 65 && c <= 90) c -= 54; // remap big letters |
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| 178 | else if (c >= 97 && c <= 122) c -= 60; // remap small letters |
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| 179 | else if (c == '(') c = 63; // remap |
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| 180 | else if (c == ')') c = 64; // remap |
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| 181 | else if (c == '.') c = 65; // remap |
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| 736 | cascade | 182 | else if (c == '-') c = 73; // remap minus |
| 331 | cascade | 183 | else if (c == ';') c = 67; // remap |
| 184 | else if (c == ':') c = 68; // remap |
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| 185 | else if (c == ',') c = 69; // remap |
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| 761 | - | 186 | // else if (c == '?') c = 66; // remap |
| 187 | // else if (c == '\'') c = 70; // remap |
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| 757 | cascade | 188 | else if (c == '/') c = 71; // remap |
| 761 | - | 189 | // else if (c == '"') c = 72; // remap |
| 190 | // else if (c == '<') c = 74; // remap |
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| 191 | // else if (c == '>') c = 75; // remap |
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| 192 | // else if (c == '@') c = 76; // remap |
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| 331 | cascade | 193 | write_char(address, c); |
| 194 | } |
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| 195 | |||
| 196 | /** |
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| 197 | * write an ascii <string> at <x>/<y> to MAX7456 display memory |
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| 198 | */ |
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| 199 | void write_ascii_string(uint8_t x, uint8_t y, char *string) { |
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| 200 | while (*string) { |
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| 201 | write_ascii_char(((x++)+(y * 30)), *string); |
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| 202 | string++; |
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| 203 | } |
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| 204 | } |
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| 205 | |||
| 206 | /** |
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| 783 | - | 207 | * write an ascii <string> with lenght <len> at <x>/<y> to MAX7456 display memory |
| 208 | */ |
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| 209 | void write_ascii_string_len(uint8_t x, uint8_t y, char *string, uint8_t len) { |
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| 210 | while (len--) { |
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| 211 | write_ascii_char(((x++)+(y * 30)), *string); |
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| 212 | string++; |
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| 213 | } |
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| 214 | } |
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| 215 | |||
| 216 | /** |
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| 346 | cascade | 217 | * write an ascii <string> from progmen at <x>/<y> to MAX7456 display memory |
| 218 | */ |
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| 489 | woggle | 219 | void write_ascii_string_pgm(uint8_t x, uint8_t y, const char *string) { |
| 761 | - | 220 | while (pgm_read_byte(string) != 0x00) |
| 221 | write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++)); |
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| 346 | cascade | 222 | } |
| 223 | |||
| 224 | /** |
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| 379 | cascade | 225 | * write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory |
| 226 | */ |
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| 489 | woggle | 227 | void write_string_pgm_down(uint8_t x, uint8_t y, const char *string, uint8_t length) { |
| 761 | - | 228 | while (length--) |
| 229 | write_char((x + (y++ * 30)), pgm_read_byte(string++)); |
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| 379 | cascade | 230 | } |
| 231 | |||
| 232 | /** |
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| 519 | cascade | 233 | * Write a unsigned <number> at <x>/<y> to MAX7456 display memory |
| 234 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 235 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 236 | */ |
| 519 | cascade | 237 | void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) { |
| 800 | - | 238 | if (number >= pow(10, length)) { |
| 239 | number = pow(10, length) - 1; |
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| 240 | } |
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| 761 | - | 241 | itoa(number, conv_array, 10); |
| 242 | for (uint8_t i = 0; i < length - strlen(conv_array); i++) { |
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| 243 | if (pad) write_char((x++)+(y * 30), 10); |
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| 244 | else write_ascii_char((x++)+(y * 30), 0); |
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| 245 | } |
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| 246 | write_ascii_string(x, y, conv_array); |
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| 331 | cascade | 247 | } |
| 248 | |||
| 249 | /** |
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| 519 | cascade | 250 | * Write a signed <number> at <x>/<y> to MAX7456 display memory |
| 251 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 252 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 253 | */ |
| 519 | cascade | 254 | void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) { |
| 800 | - | 255 | if (number <= -pow(10, length)) { |
| 256 | number = -pow(10, length) + 1; |
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| 257 | } else if (number >= pow(10, length)) { |
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| 258 | number = pow(10, length) - 1; |
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| 259 | } |
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| 260 | |||
| 761 | - | 261 | itoa(number, conv_array, 10); |
| 800 | - | 262 | if (strlen(conv_array) < length) { |
| 263 | for (uint8_t i = 0; i < length - strlen(conv_array); i++) { |
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| 264 | if (pad) write_char((x++)+(y * 30), 10); |
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| 265 | else write_ascii_char((x++)+(y * 30), 0); |
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| 266 | } |
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| 761 | - | 267 | } |
| 268 | write_ascii_string(x, y, conv_array); |
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| 331 | cascade | 269 | } |
| 270 | |||
| 271 | /** |
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| 519 | cascade | 272 | * Write a unsigned <number> at <x>/<y> to MAX7456 display memory as /10th of value |
| 273 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 274 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 275 | */ |
| 519 | cascade | 276 | void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) { |
| 800 | - | 277 | if (number >= pow(10, length)) { |
| 278 | number = pow(10, length) - 1; |
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| 279 | } |
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| 761 | - | 280 | itoa(number, conv_array, 10); |
| 281 | uint8_t len = strlen(conv_array); |
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| 282 | for (uint8_t i = 0; i < length - len; i++) { |
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| 283 | if (pad) write_char((x++)+(y * 30), 10); // zero |
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| 284 | else write_char((x++)+(y * 30), 0); // blank |
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| 285 | } |
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| 286 | char rest = conv_array[len - 1]; |
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| 287 | conv_array[len - 1] = 0; |
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| 288 | if (len == 1) { |
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| 289 | write_char((x - 1)+(y * 30), 10); // zero |
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| 290 | } else if (len == 2 && conv_array[0] == '-') { |
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| 291 | write_char((x - 1)+(y * 30), 0x49); // minus |
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| 292 | write_char((x)+(y * 30), 10); // zero |
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| 293 | } else { |
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| 294 | write_ascii_string(x, y, conv_array); |
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| 295 | } |
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| 296 | x += len - 1; |
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| 297 | write_char((x++)+(y * 30), 65); // decimal point |
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| 298 | write_ascii_char((x++)+(y * 30), rest); // after dot |
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| 331 | cascade | 299 | } |
| 300 | |||
| 301 | /** |
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| 519 | cascade | 302 | * Write a signed <number> at <x>/<y> to MAX7456 display memory as /10th of value |
| 303 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 304 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 305 | */ |
| 519 | cascade | 306 | void write_ndigit_number_s_10th(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) { |
| 800 | - | 307 | if (number >= pow(10, length)) { |
| 308 | number = pow(10, length) - 1; |
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| 309 | } |
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| 761 | - | 310 | itoa(number, conv_array, 10); |
| 311 | uint8_t len = strlen(conv_array); |
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| 312 | for (uint8_t i = 0; i < length - len; i++) { |
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| 313 | if (pad) write_char((x++)+(y * 30), 10); // zero |
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| 314 | else write_char((x++)+(y * 30), 0); // blank |
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| 315 | } |
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| 316 | char rest = conv_array[len - 1]; |
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| 317 | conv_array[len - 1] = 0; |
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| 318 | if (len == 1) { |
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| 319 | write_char((x - 1)+(y * 30), 10); // zero |
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| 320 | } else if (len == 2 && conv_array[0] == '-') { |
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| 321 | write_char((x - 1)+(y * 30), 0x49); // minus |
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| 322 | write_char((x)+(y * 30), 10); // zero |
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| 323 | } else { |
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| 324 | write_ascii_string(x, y, conv_array); |
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| 325 | } |
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| 326 | x += len - 1; |
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| 327 | write_char((x++)+(y * 30), 65); // decimal point |
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| 328 | write_ascii_char((x++)+(y * 30), rest); // after dot |
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| 331 | cascade | 329 | } |
| 330 | |||
| 331 | /** |
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| 332 | * write <seconds> as human readable time at <x>/<y> to MAX7456 display mem |
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| 333 | */ |
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| 334 | void write_time(uint8_t x, uint8_t y, uint16_t seconds) { |
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| 335 | uint16_t min = seconds / 60; |
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| 336 | seconds -= min * 60; |
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| 519 | cascade | 337 | write_ndigit_number_u(x, y, min, 3, 0); |
| 331 | cascade | 338 | write_char_xy(x + 3, y, 68); |
| 519 | cascade | 339 | write_ndigit_number_u(x + 4, y, seconds, 2, 1); |
| 331 | cascade | 340 | } |
| 341 | |||
| 342 | /** |
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| 412 | cascade | 343 | * wirte a <position> at <x>/<y> assuming it is a gps position for long-/latitude |
| 344 | */ |
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| 345 | void write_gps_pos(uint8_t x, uint8_t y, int32_t position) { |
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| 761 | - | 346 | if (position < 0) { |
| 347 | position ^= ~0; |
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| 348 | position++; |
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| 349 | write_char_xy(x++, y, 0x49); // minus |
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| 350 | } else { |
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| 351 | write_char_xy(x++, y, 0); // clear ('+' would be nice, maybe later) |
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| 352 | } |
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| 353 | write_ndigit_number_u(x, y, (uint16_t)(position / (int32_t)10000000), 3, 1); |
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| 354 | write_char_xy(x + 3, y, 65); // decimal point |
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| 355 | position = position - ((position / (int32_t)10000000) * (int32_t)10000000); |
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| 356 | write_ndigit_number_u(x + 4, y, (uint16_t)(position / (int32_t)1000), 4, 1); |
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| 357 | position = position - ((uint16_t)(position / (int32_t)1000) * (int32_t)1000); |
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| 358 | write_ndigit_number_u(x + 8, y, (uint16_t)position, 3, 1); |
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| 359 | write_char_xy(x + 11, y, 0xD0); // degree symbol |
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| 412 | cascade | 360 | } |
| 514 | cascade | 361 | |
| 362 | #endif |