Andy K / MODMAX7456

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?

UserRevisionLine numberNew contents of line
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 }