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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> |
| 519 | cascade | 22 | |
| 346 | cascade | 23 | #include <util/delay.h> |
| 24 | #include <avr/pgmspace.h> |
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| 519 | cascade | 25 | #include <string.h> |
| 26 | #include <stdlib.h> |
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| 514 | cascade | 27 | #include "main.h" |
| 331 | cascade | 28 | #include "max7456_software_spi.h" |
| 29 | |||
| 30 | /* ########################################################################## |
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| 31 | * MAX7456 SPI & Display stuff |
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| 32 | * ##########################################################################*/ |
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| 33 | |||
| 34 | /** |
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| 35 | * Send a byte through SPI |
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| 519 | cascade | 36 | * inline because it increases the codesize currenlty 'only' by 110byte but saves |
| 37 | * the context-change on every char and attribute which is at least done twice |
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| 38 | * (address and data byte), a significant speed-bost we do not want to miss :) |
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| 331 | cascade | 39 | */ |
| 519 | cascade | 40 | inline void spi_send(uint8_t byte) { |
| 331 | cascade | 41 | for (int8_t i = 7; i >= 0; i--) { |
| 42 | if (((byte >> i) & 1)) { |
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| 43 | MAX_SDIN_HIGH |
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| 44 | } else { |
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| 45 | MAX_SDIN_LOW |
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| 46 | } |
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| 47 | MAX_SCLK_HIGH |
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| 48 | MAX_SCLK_LOW |
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| 49 | } |
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| 50 | } |
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| 51 | |||
| 52 | /** |
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| 53 | * Send <byte> to <address> of MAX7456 |
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| 54 | */ |
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| 55 | void spi_send_byte(uint8_t address, uint8_t byte) { |
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| 56 | // start sending |
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| 57 | MAX_CS_LOW |
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| 58 | |||
| 59 | spi_send(address); |
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| 60 | spi_send(byte); |
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| 61 | |||
| 62 | // end sending |
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| 63 | MAX_CS_HIGH |
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| 64 | } |
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| 65 | |||
| 514 | cascade | 66 | |
| 331 | cascade | 67 | /** |
| 68 | * write a <character> to <address> of MAX7456 display memory |
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| 69 | */ |
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| 70 | void write_char(uint16_t address, char character) { |
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| 71 | spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH |
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| 72 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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| 73 | spi_send_byte(0x07, character); // DMDI |
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| 74 | } |
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| 75 | |||
| 514 | cascade | 76 | |
| 331 | cascade | 77 | /** |
| 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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| 86 | // clear all display-mem (DMM) |
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| 87 | spi_send_byte(0x04, 0b01000100); |
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| 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 | |||
| 94 | /** |
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| 95 | * for testing write all chars to screen |
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| 96 | */ |
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| 97 | void write_all_chars() { |
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| 98 | uint16_t x = 3, y = 2, t = 0; |
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| 99 | while (t < 256) { |
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| 100 | write_char(x++ + y*30, t++); |
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| 101 | if (x > 25) { |
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| 102 | y++; |
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| 103 | x = 3; |
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| 104 | } |
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| 105 | } |
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| 106 | } |
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| 107 | |||
| 108 | #if !(ALLCHARSDEBUG|(WRITECHARS != -1)) |
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| 109 | |||
| 110 | /** |
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| 331 | cascade | 111 | * write a character <attribute> to <address> of MAX7456 display memory |
| 112 | */ |
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| 113 | void write_char_att(uint16_t address, char attribute) { |
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| 114 | // the only important part is that the DMAH[1] is set |
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| 115 | // so we add 2 which binary is the 2nd lowest byte |
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| 116 | spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH |
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| 117 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
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| 118 | spi_send_byte(0x07, attribute); // DMDI |
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| 119 | } |
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| 120 | |||
| 121 | /** |
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| 122 | * write a <character> at <x>/<y> to MAX7456 display memory |
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| 123 | */ |
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| 124 | void write_char_xy(uint8_t x, uint8_t y, char character) { |
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| 125 | uint16_t address = y * 30 + x; |
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| 126 | write_char(address, character); |
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| 127 | } |
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| 128 | |||
| 129 | /** |
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| 130 | * write a character <attribute> at <x>/<y> to MAX7456 display memory |
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| 131 | */ |
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| 132 | void write_char_att_xy(uint8_t x, uint8_t y, char attribute) { |
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| 133 | uint16_t address = y * 30 + x; |
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| 134 | write_char_att(address, attribute); |
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| 135 | } |
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| 136 | |||
| 137 | /** |
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| 514 | cascade | 138 | * let the MAX7456 learn a new character at <number> |
| 139 | * with <data>. |
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| 331 | cascade | 140 | */ |
| 514 | cascade | 141 | void learn_char(uint8_t number, unsigned char* data) { |
| 142 | // select character to write (CMAH) |
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| 143 | spi_send_byte(0x09, number); |
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| 404 | cascade | 144 | |
| 514 | cascade | 145 | for (uint8_t i = 0; i < 54; i++) { |
| 146 | // select 4pixel byte of char (CMAL) |
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| 147 | spi_send_byte(0x0A, i); |
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| 148 | |||
| 149 | // write 4pixel byte of char (CMDI) |
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| 150 | spi_send_byte(0x0B, data[i]); |
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| 151 | } |
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| 152 | |||
| 153 | // write to the NVM array from the shadow RAM (CMM) |
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| 154 | spi_send_byte(0x08, 0b10100000); |
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| 155 | |||
| 156 | // according to maxim writing to nvram takes about 12ms, lets wait longer |
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| 157 | _delay_ms(120); |
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| 331 | cascade | 158 | } |
| 159 | |||
| 160 | /** |
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| 161 | * write an ascii <character> to <address> of MAX7456 display memory |
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| 162 | */ |
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| 163 | void write_ascii_char(uint16_t address, char c) { |
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| 164 | if (c == 32) c = 0; // remap space |
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| 165 | else if (c > 48 && c <= 57) c -= 48; // remap numbers |
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| 166 | else if (c == '0') c = 10; // remap zero |
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| 167 | else if (c >= 65 && c <= 90) c -= 54; // remap big letters |
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| 168 | else if (c >= 97 && c <= 122) c -= 60; // remap small letters |
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| 169 | else if (c == '(') c = 63; // remap |
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| 170 | else if (c == ')') c = 64; // remap |
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| 171 | else if (c == '.') c = 65; // remap |
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| 172 | else if (c == '?') c = 66; // remap |
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| 173 | else if (c == ';') c = 67; // remap |
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| 174 | else if (c == ':') c = 68; // remap |
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| 175 | else if (c == ',') c = 69; // remap |
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| 176 | else if (c == '\'') c = 70; // remap |
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| 177 | else if (c == '/') c = 71; // remap |
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| 178 | else if (c == '"') c = 72; // remap |
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| 179 | else if (c == '-') c = 73; // remap minus |
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| 180 | else if (c == '<') c = 74; // remap |
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| 181 | else if (c == '>') c = 75; // remap |
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| 182 | else if (c == '@') c = 76; // remap |
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| 183 | write_char(address, c); |
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| 184 | } |
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| 185 | |||
| 186 | /** |
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| 187 | * write an ascii <string> at <x>/<y> to MAX7456 display memory |
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| 188 | */ |
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| 189 | void write_ascii_string(uint8_t x, uint8_t y, char *string) { |
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| 190 | while (*string) { |
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| 191 | write_ascii_char(((x++)+(y * 30)), *string); |
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| 192 | string++; |
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| 193 | } |
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| 194 | } |
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| 195 | |||
| 196 | /** |
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| 346 | cascade | 197 | * write an ascii <string> from progmen at <x>/<y> to MAX7456 display memory |
| 198 | */ |
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| 489 | woggle | 199 | void write_ascii_string_pgm(uint8_t x, uint8_t y, const char *string) { |
| 346 | cascade | 200 | while (pgm_read_byte(string) != 0x00) |
| 201 | write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++)); |
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| 202 | } |
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| 203 | |||
| 204 | /** |
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| 379 | cascade | 205 | * write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory |
| 206 | */ |
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| 489 | woggle | 207 | void write_string_pgm_down(uint8_t x, uint8_t y, const char *string, uint8_t length) { |
| 379 | cascade | 208 | while (length--) |
| 209 | write_char((x+(y++ * 30)), pgm_read_byte(string++)); |
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| 210 | } |
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| 211 | |||
| 212 | /** |
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| 519 | cascade | 213 | * Write a unsigned <number> at <x>/<y> to MAX7456 display memory |
| 214 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 215 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 216 | */ |
| 519 | cascade | 217 | void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) { |
| 218 | char s[7]; |
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| 219 | itoa(number, s, 10 ); |
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| 220 | for (uint8_t i = 0; i < length - strlen(s); i++) { |
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| 221 | if (pad) write_char((x++)+(y * 30), 10); |
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| 222 | else write_ascii_char((x++)+(y * 30), 0); |
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| 223 | } |
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| 224 | write_ascii_string(x, y, s); |
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| 331 | cascade | 225 | } |
| 226 | |||
| 227 | /** |
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| 519 | cascade | 228 | * Write a signed <number> at <x>/<y> to MAX7456 display memory |
| 229 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 230 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 231 | */ |
| 519 | cascade | 232 | void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t length, uint8_t pad) { |
| 233 | char s[7]; |
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| 234 | itoa(number, s, 10 ); |
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| 235 | for (uint8_t i = 0; i < length - strlen(s); i++) { |
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| 236 | if (pad) write_char((x++)+(y * 30), 10); |
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| 237 | else write_ascii_char((x++)+(y * 30), 0); |
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| 238 | } |
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| 239 | write_ascii_string(x, y, s); |
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| 331 | cascade | 240 | } |
| 241 | |||
| 242 | /** |
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| 519 | cascade | 243 | * Write a unsigned <number> at <x>/<y> to MAX7456 display memory as /10th of value |
| 244 | * <length> represents the length to rightbound the number |
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| 349 | cascade | 245 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
| 331 | cascade | 246 | */ |
| 519 | cascade | 247 | void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t length, uint8_t pad) { |
| 248 | char s[7]; |
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| 249 | itoa(number, s, 10 ); |
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| 523 | cascade | 250 | uint8_t len = strlen(s); |
| 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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| 519 | cascade | 254 | } |
| 523 | cascade | 255 | char rest = s[len - 1]; |
| 256 | s[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 && s[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, s); |
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| 264 | } |
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| 265 | x += len - 1; |
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| 519 | cascade | 266 | write_char((x++)+(y * 30), 65); // decimal point |
| 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) { |
| 276 | char s[7]; |
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| 277 | itoa(number, s, 10 ); |
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| 523 | cascade | 278 | uint8_t len = strlen(s); |
| 279 | for (uint8_t i = 0; i < length - len; i++) { |
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| 280 | if (pad) write_char((x++)+(y * 30), 10); // zero |
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| 281 | else write_char((x++)+(y * 30), 0); // blank |
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| 519 | cascade | 282 | } |
| 523 | cascade | 283 | char rest = s[len - 1]; |
| 284 | s[len - 1] = 0; |
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| 285 | if (len == 1) { |
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| 286 | write_char((x-1)+(y * 30), 10); // zero |
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| 287 | } else if (len == 2 && s[0] == '-') { |
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| 288 | write_char((x-1)+(y * 30), 0x49); // minus |
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| 289 | write_char((x)+(y * 30), 10); // zero |
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| 290 | } else { |
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| 519 | cascade | 291 | write_ascii_string(x, y, s); |
| 292 | } |
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| 523 | cascade | 293 | x += len - 1; |
| 519 | cascade | 294 | write_char((x++)+(y * 30), 65); // decimal point |
| 295 | write_ascii_char((x++)+(y * 30), rest); // after dot |
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| 331 | cascade | 296 | } |
| 297 | |||
| 298 | /** |
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| 299 | * write <seconds> as human readable time at <x>/<y> to MAX7456 display mem |
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| 300 | */ |
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| 301 | void write_time(uint8_t x, uint8_t y, uint16_t seconds) { |
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| 302 | uint16_t min = seconds / 60; |
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| 303 | seconds -= min * 60; |
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| 519 | cascade | 304 | write_ndigit_number_u(x, y, min, 3, 0); |
| 331 | cascade | 305 | write_char_xy(x + 3, y, 68); |
| 519 | cascade | 306 | write_ndigit_number_u(x + 4, y, seconds, 2, 1); |
| 331 | cascade | 307 | } |
| 308 | |||
| 309 | /** |
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| 412 | cascade | 310 | * wirte a <position> at <x>/<y> assuming it is a gps position for long-/latitude |
| 311 | */ |
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| 312 | void write_gps_pos(uint8_t x, uint8_t y, int32_t position) { |
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| 489 | woggle | 313 | if (position < 0) { |
| 314 | position ^= ~0; |
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| 431 | cascade | 315 | position++; |
| 412 | cascade | 316 | write_char_xy(x++, y, 0x49); // minus |
| 317 | } else { |
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| 318 | write_char_xy(x++, y, 0); // clear ('+' would be nice, maybe later) |
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| 319 | } |
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| 519 | cascade | 320 | write_ndigit_number_u(x, y, (uint16_t) (position / (int32_t) 10000000), 3, 1); |
| 412 | cascade | 321 | write_char_xy(x + 3, y, 65); // decimal point |
| 322 | position = position - ((position / (int32_t) 10000000) * (int32_t) 10000000); |
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| 519 | cascade | 323 | write_ndigit_number_u(x + 4, y, (uint16_t) (position / (int32_t) 1000), 4, 1); |
| 412 | cascade | 324 | position = position - ((uint16_t) (position / (int32_t) 1000) * (int32_t) 1000); |
| 519 | cascade | 325 | write_ndigit_number_u(x + 8, y, (uint16_t) position, 3, 1); |
| 412 | cascade | 326 | write_char_xy(x + 11, y, 0xD0); // degree symbol |
| 327 | } |
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| 514 | cascade | 328 | |
| 329 | #endif |