OSD7456.cpp

00001 /*
00002     Copyright (c) 2010 Andy Kirkham
00003  
00004     Permission is hereby granted, free of charge, to any person obtaining a copy
00005     of this software and associated documentation files (the "Software"), to deal
00006     in the Software without restriction, including without limitation the rights
00007     to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008     copies of the Software, and to permit persons to whom the Software is
00009     furnished to do so, subject to the following conditions:
00010  
00011     The above copyright notice and this permission notice shall be included in
00012     all copies or substantial portions of the Software.
00013  
00014     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015     IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017     AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018     LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00020     THE SOFTWARE.
00021 */
00022 
00023 #include "mbed.h"
00024 #include "OSD7456.h"
00025 
00026 void
00027 OSD7456::init(void)
00028 {
00029     for (int i = 0; i < OSD_NUM_LINES; i++) { clear(i); } 
00030     oddEven = false;   
00031     max7456->vsync_set_callback(this, &OSD7456::vsync);
00032 }
00033 
00034 void
00035 OSD7456::clear(int line)
00036 {
00037     lines[line].updated = true;
00038     memset(lines[line].line, ' ', OSD_LINE_LEN);
00039     memset(lines[line].attrib, 0, OSD_LINE_LEN);
00040 }
00041 
00042 void 
00043 OSD7456::vsync(void)
00044 {
00045     if (oddEven) {
00046         oddEven = false;
00047     }
00048     else {
00049         for (int i = 0; i < OSD_NUM_LINES; i++) {
00050             if (lines[i].updated) {
00051                 max7456->stringxy(0, i, lines[i].line, lines[i].attrib);
00052                 lines[i].updated = false;
00053             }
00054         }
00055         oddEven = true;
00056         cb_vsync.call();
00057     }
00058 }
00059 
00060 int 
00061 OSD7456::print(int line, char *s) 
00062 { 
00063     int i = 0; 
00064     while (*s != '\0') { 
00065         lines[line].line[i] = *s; 
00066         s++; i++; 
00067     } 
00068     lines[line].updated = true; 
00069     return i; 
00070 }
00071  
00072 int 
00073 OSD7456::print(int line, char *s, char attrib) 
00074 { 
00075     int i = 0; 
00076     while (*s != '\0') { 
00077         lines[line].line[i] = *s; 
00078         lines[line].attrib[i] = attrib; 
00079         s++; i++; 
00080     } 
00081     lines[line].updated = true; 
00082     return i; 
00083 }
00084 
00085 int 
00086 OSD7456::print(int x, int y, char *s) 
00087 { 
00088     int i = 0; 
00089     while (*s != '\0') { 
00090         lines[y].line[i+x] = *s; 
00091         s++; i++; 
00092     } 
00093     lines[y].updated = true; 
00094     return i; 
00095 }
00096 
00097 int 
00098 OSD7456::print(int x, int y, char *s, char attrib) 
00099 { 
00100     int i = 0; 
00101     while (*s != '\0') { 
00102         lines[y].line[i+x] = *s; 
00103         lines[y].attrib[i+x] = attrib; 
00104         s++; i++; 
00105     } 
00106     lines[y].updated = true; 
00107     return i; 
00108 }