This module provides a simple API to the Maxim MAX7456 on-screen display chip
OSD7456.cpp@0:d7cd54ad4c3d, 2010-11-16 (annotated)
- Committer:
- AjK
- Date:
- Tue Nov 16 10:47:25 2010 +0000
- Revision:
- 0:d7cd54ad4c3d
1.7
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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AjK | 0:d7cd54ad4c3d | 1 | /* |
AjK | 0:d7cd54ad4c3d | 2 | Copyright (c) 2010 Andy Kirkham |
AjK | 0:d7cd54ad4c3d | 3 | |
AjK | 0:d7cd54ad4c3d | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
AjK | 0:d7cd54ad4c3d | 5 | of this software and associated documentation files (the "Software"), to deal |
AjK | 0:d7cd54ad4c3d | 6 | in the Software without restriction, including without limitation the rights |
AjK | 0:d7cd54ad4c3d | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
AjK | 0:d7cd54ad4c3d | 8 | copies of the Software, and to permit persons to whom the Software is |
AjK | 0:d7cd54ad4c3d | 9 | furnished to do so, subject to the following conditions: |
AjK | 0:d7cd54ad4c3d | 10 | |
AjK | 0:d7cd54ad4c3d | 11 | The above copyright notice and this permission notice shall be included in |
AjK | 0:d7cd54ad4c3d | 12 | all copies or substantial portions of the Software. |
AjK | 0:d7cd54ad4c3d | 13 | |
AjK | 0:d7cd54ad4c3d | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
AjK | 0:d7cd54ad4c3d | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
AjK | 0:d7cd54ad4c3d | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
AjK | 0:d7cd54ad4c3d | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
AjK | 0:d7cd54ad4c3d | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
AjK | 0:d7cd54ad4c3d | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
AjK | 0:d7cd54ad4c3d | 20 | THE SOFTWARE. |
AjK | 0:d7cd54ad4c3d | 21 | */ |
AjK | 0:d7cd54ad4c3d | 22 | |
AjK | 0:d7cd54ad4c3d | 23 | #include "mbed.h" |
AjK | 0:d7cd54ad4c3d | 24 | #include "OSD7456.h" |
AjK | 0:d7cd54ad4c3d | 25 | |
AjK | 0:d7cd54ad4c3d | 26 | void |
AjK | 0:d7cd54ad4c3d | 27 | OSD7456::init(void) |
AjK | 0:d7cd54ad4c3d | 28 | { |
AjK | 0:d7cd54ad4c3d | 29 | for (int i = 0; i < OSD_NUM_LINES; i++) { clear(i); } |
AjK | 0:d7cd54ad4c3d | 30 | oddEven = false; |
AjK | 0:d7cd54ad4c3d | 31 | max7456->vsync_set_callback(this, &OSD7456::vsync); |
AjK | 0:d7cd54ad4c3d | 32 | } |
AjK | 0:d7cd54ad4c3d | 33 | |
AjK | 0:d7cd54ad4c3d | 34 | void |
AjK | 0:d7cd54ad4c3d | 35 | OSD7456::clear(int line) |
AjK | 0:d7cd54ad4c3d | 36 | { |
AjK | 0:d7cd54ad4c3d | 37 | lines[line].updated = true; |
AjK | 0:d7cd54ad4c3d | 38 | memset(lines[line].line, ' ', OSD_LINE_LEN); |
AjK | 0:d7cd54ad4c3d | 39 | memset(lines[line].attrib, 0, OSD_LINE_LEN); |
AjK | 0:d7cd54ad4c3d | 40 | } |
AjK | 0:d7cd54ad4c3d | 41 | |
AjK | 0:d7cd54ad4c3d | 42 | void |
AjK | 0:d7cd54ad4c3d | 43 | OSD7456::vsync(void) |
AjK | 0:d7cd54ad4c3d | 44 | { |
AjK | 0:d7cd54ad4c3d | 45 | if (oddEven) { |
AjK | 0:d7cd54ad4c3d | 46 | oddEven = false; |
AjK | 0:d7cd54ad4c3d | 47 | } |
AjK | 0:d7cd54ad4c3d | 48 | else { |
AjK | 0:d7cd54ad4c3d | 49 | for (int i = 0; i < OSD_NUM_LINES; i++) { |
AjK | 0:d7cd54ad4c3d | 50 | if (lines[i].updated) { |
AjK | 0:d7cd54ad4c3d | 51 | max7456->stringxy(0, i, lines[i].line, lines[i].attrib); |
AjK | 0:d7cd54ad4c3d | 52 | lines[i].updated = false; |
AjK | 0:d7cd54ad4c3d | 53 | } |
AjK | 0:d7cd54ad4c3d | 54 | } |
AjK | 0:d7cd54ad4c3d | 55 | oddEven = true; |
AjK | 0:d7cd54ad4c3d | 56 | cb_vsync.call(); |
AjK | 0:d7cd54ad4c3d | 57 | } |
AjK | 0:d7cd54ad4c3d | 58 | } |
AjK | 0:d7cd54ad4c3d | 59 | |
AjK | 0:d7cd54ad4c3d | 60 | int |
AjK | 0:d7cd54ad4c3d | 61 | OSD7456::print(int line, char *s) |
AjK | 0:d7cd54ad4c3d | 62 | { |
AjK | 0:d7cd54ad4c3d | 63 | int i = 0; |
AjK | 0:d7cd54ad4c3d | 64 | while (*s != '\0') { |
AjK | 0:d7cd54ad4c3d | 65 | lines[line].line[i] = *s; |
AjK | 0:d7cd54ad4c3d | 66 | s++; i++; |
AjK | 0:d7cd54ad4c3d | 67 | } |
AjK | 0:d7cd54ad4c3d | 68 | lines[line].updated = true; |
AjK | 0:d7cd54ad4c3d | 69 | return i; |
AjK | 0:d7cd54ad4c3d | 70 | } |
AjK | 0:d7cd54ad4c3d | 71 | |
AjK | 0:d7cd54ad4c3d | 72 | int |
AjK | 0:d7cd54ad4c3d | 73 | OSD7456::print(int line, char *s, char attrib) |
AjK | 0:d7cd54ad4c3d | 74 | { |
AjK | 0:d7cd54ad4c3d | 75 | int i = 0; |
AjK | 0:d7cd54ad4c3d | 76 | while (*s != '\0') { |
AjK | 0:d7cd54ad4c3d | 77 | lines[line].line[i] = *s; |
AjK | 0:d7cd54ad4c3d | 78 | lines[line].attrib[i] = attrib; |
AjK | 0:d7cd54ad4c3d | 79 | s++; i++; |
AjK | 0:d7cd54ad4c3d | 80 | } |
AjK | 0:d7cd54ad4c3d | 81 | lines[line].updated = true; |
AjK | 0:d7cd54ad4c3d | 82 | return i; |
AjK | 0:d7cd54ad4c3d | 83 | } |
AjK | 0:d7cd54ad4c3d | 84 | |
AjK | 0:d7cd54ad4c3d | 85 | int |
AjK | 0:d7cd54ad4c3d | 86 | OSD7456::print(int x, int y, char *s) |
AjK | 0:d7cd54ad4c3d | 87 | { |
AjK | 0:d7cd54ad4c3d | 88 | int i = 0; |
AjK | 0:d7cd54ad4c3d | 89 | while (*s != '\0') { |
AjK | 0:d7cd54ad4c3d | 90 | lines[y].line[i+x] = *s; |
AjK | 0:d7cd54ad4c3d | 91 | s++; i++; |
AjK | 0:d7cd54ad4c3d | 92 | } |
AjK | 0:d7cd54ad4c3d | 93 | lines[y].updated = true; |
AjK | 0:d7cd54ad4c3d | 94 | return i; |
AjK | 0:d7cd54ad4c3d | 95 | } |
AjK | 0:d7cd54ad4c3d | 96 | |
AjK | 0:d7cd54ad4c3d | 97 | int |
AjK | 0:d7cd54ad4c3d | 98 | OSD7456::print(int x, int y, char *s, char attrib) |
AjK | 0:d7cd54ad4c3d | 99 | { |
AjK | 0:d7cd54ad4c3d | 100 | int i = 0; |
AjK | 0:d7cd54ad4c3d | 101 | while (*s != '\0') { |
AjK | 0:d7cd54ad4c3d | 102 | lines[y].line[i+x] = *s; |
AjK | 0:d7cd54ad4c3d | 103 | lines[y].attrib[i+x] = attrib; |
AjK | 0:d7cd54ad4c3d | 104 | s++; i++; |
AjK | 0:d7cd54ad4c3d | 105 | } |
AjK | 0:d7cd54ad4c3d | 106 | lines[y].updated = true; |
AjK | 0:d7cd54ad4c3d | 107 | return i; |
AjK | 0:d7cd54ad4c3d | 108 | } |