Martin Johnson / Colour_Video_Demo

Demo of low res colour vga video for stm32f3 discovery board

Dependencies:   STM32F3-Discovery-minimal

Fork of Space_Invaders_Demo by Martin Johnson

mth.c@17:833f1b69e11d, 2019-04-03 (annotated)

Committer:
MartinJohnson
Date:
Wed Apr 03 22:05:56 2019 +0000
Revision:
17:833f1b69e11d
Parent:
0:404dae88af71 
update library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MartinJohnson 0:404dae88af71 1 /***************************************************************************
MartinJohnson 0:404dae88af71 2 * STM32 VGA demo
MartinJohnson 0:404dae88af71 3 * Copyright (C) 2012 Artekit Italy
MartinJohnson 0:404dae88af71 4 * http://www.artekit.eu
MartinJohnson 0:404dae88af71 5 * Written by Ruben H. Meleca
MartinJohnson 0:404dae88af71 6
MartinJohnson 0:404dae88af71 7 ### mth.c
MartinJohnson 0:404dae88af71 8
MartinJohnson 0:404dae88af71 9 # This program is free software; you can redistribute it and/or modify
MartinJohnson 0:404dae88af71 10 # it under the terms of the GNU General Public License as published by
MartinJohnson 0:404dae88af71 11 # the Free Software Foundation; either version 2 of the License, or
MartinJohnson 0:404dae88af71 12 # (at your option) any later version.
MartinJohnson 0:404dae88af71 13 #
MartinJohnson 0:404dae88af71 14 # This program is distributed in the hope that it will be useful,
MartinJohnson 0:404dae88af71 15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
MartinJohnson 0:404dae88af71 16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
MartinJohnson 0:404dae88af71 17 # GNU General Public License for more details.
MartinJohnson 0:404dae88af71 18 #
MartinJohnson 0:404dae88af71 19 # You should have received a copy of the GNU General Public License
MartinJohnson 0:404dae88af71 20 # along with this program; if not, write to the Free Software
MartinJohnson 0:404dae88af71 21 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
MartinJohnson 0:404dae88af71 22
MartinJohnson 0:404dae88af71 23 ***************************************************************************/
MartinJohnson 0:404dae88af71 24
MartinJohnson 0:404dae88af71 25 #include "mth.h"
MartinJohnson 0:404dae88af71 26
MartinJohnson 0:404dae88af71 27 static const i16 SineTable[360] =
MartinJohnson 0:404dae88af71 28 {
MartinJohnson 0:404dae88af71 29 0, 174, 348, 523, 697, 871, 1045, 1218, 1391,
MartinJohnson 0:404dae88af71 30 1564, 1736, 1908, 2079, 2249, 2419, 2588, 2756, 2923,
MartinJohnson 0:404dae88af71 31 3090, 3255, 3420, 3583, 3746, 3907, 4067, 4226, 4383,
MartinJohnson 0:404dae88af71 32 4539, 4694, 4848, 4999, 5150, 5299, 5446, 5591, 5735,
MartinJohnson 0:404dae88af71 33 5877, 6018, 6156, 6293, 6427, 6560, 6691, 6819, 6946,
MartinJohnson 0:404dae88af71 34 7071, 7193, 7313, 7431, 7547, 7660, 7771, 7880, 7986,
MartinJohnson 0:404dae88af71 35 8090, 8191, 8290, 8386, 8480, 8571, 8660, 8746, 8829,
MartinJohnson 0:404dae88af71 36 8910, 8987, 9063, 9135, 9205, 9271, 9335, 9396, 9455,
MartinJohnson 0:404dae88af71 37 9510, 9563, 9612, 9659, 9702, 9743, 9781, 9816, 9848,
MartinJohnson 0:404dae88af71 38 9876, 9902, 9925, 9945, 9961, 9975, 9986, 9993, 9998,
MartinJohnson 0:404dae88af71 39 10000, 9998, 9993, 9986, 9975, 9961, 9945, 9925, 9902,
MartinJohnson 0:404dae88af71 40 9876, 9848, 9816, 9781, 9743, 9702, 9659, 9612, 9563,
MartinJohnson 0:404dae88af71 41 9510, 9455, 9396, 9335, 9271, 9205, 9135, 9063, 8987,
MartinJohnson 0:404dae88af71 42 8910, 8829, 8746, 8660, 8571, 8480, 8386, 8290, 8191,
MartinJohnson 0:404dae88af71 43 8090, 7986, 7880, 7771, 7660, 7547, 7431, 7313, 7193,
MartinJohnson 0:404dae88af71 44 7071, 6946, 6819, 6691, 6560, 6427, 6293, 6156, 6018,
MartinJohnson 0:404dae88af71 45 5877, 5735, 5591, 5446, 5299, 5150, 5000, 4848, 4694,
MartinJohnson 0:404dae88af71 46 4539, 4383, 4226, 4067, 3907, 3746, 3583, 3420, 3255,
MartinJohnson 0:404dae88af71 47 3090, 2923, 2756, 2588, 2419, 2249, 2079, 1908, 1736,
MartinJohnson 0:404dae88af71 48 1564, 1391, 1218, 1045, 871, 697, 523, 348, 174,
MartinJohnson 0:404dae88af71 49 0, -174, -348, -523, -697, -871, -1045, -1218, -1391,
MartinJohnson 0:404dae88af71 50 -1564, -1736, -1908, -2079, -2249, -2419, -2588, -2756, -2923,
MartinJohnson 0:404dae88af71 51 -3090, -3255, -3420, -3583, -3746, -3907, -4067, -4226, -4383,
MartinJohnson 0:404dae88af71 52 -4539, -4694, -4848, -4999, -5150, -5299, -5446, -5591, -5735,
MartinJohnson 0:404dae88af71 53 -5877, -6018, -6156, -6293, -6427, -6560, -6691, -6819, -6946,
MartinJohnson 0:404dae88af71 54 -7071, -7193, -7313, -7431, -7547, -7660, -7771, -7880, -7986,
MartinJohnson 0:404dae88af71 55 -8090, -8191, -8290, -8386, -8480, -8571, -8660, -8746, -8829,
MartinJohnson 0:404dae88af71 56 -8910, -8987, -9063, -9135, -9205, -9271, -9335, -9396, -9455,
MartinJohnson 0:404dae88af71 57 -9510, -9563, -9612, -9659, -9702, -9743, -9781, -9816, -9848,
MartinJohnson 0:404dae88af71 58 -9876, -9902, -9925, -9945, -9961, -9975, -9986, -9993, -9998,
MartinJohnson 0:404dae88af71 59 -10000, -9998, -9993, -9986, -9975, -9961, -9945, -9925, -9902,
MartinJohnson 0:404dae88af71 60 -9876, -9848, -9816, -9781, -9743, -9702, -9659, -9612, -9563,
MartinJohnson 0:404dae88af71 61 -9510, -9455, -9396, -9335, -9271, -9205, -9135, -9063, -8987,
MartinJohnson 0:404dae88af71 62 -8910, -8829, -8746, -8660, -8571, -8480, -8386, -8290, -8191,
MartinJohnson 0:404dae88af71 63 -8090, -7986, -7880, -7771, -7660, -7547, -7431, -7313, -7193,
MartinJohnson 0:404dae88af71 64 -7071, -6946, -6819, -6691, -6560, -6427, -6293, -6156, -6018,
MartinJohnson 0:404dae88af71 65 -5877, -5735, -5591, -5446, -5299, -5150, -5000, -4848, -4694,
MartinJohnson 0:404dae88af71 66 -4539, -4383, -4226, -4067, -3907, -3746, -3583, -3420, -3255,
MartinJohnson 0:404dae88af71 67 -3090, -2923, -2756, -2588, -2419, -2249, -2079, -1908, -1736,
MartinJohnson 0:404dae88af71 68 -1564, -1391, -1218, -1045, -871, -697, -523, -348, -174
MartinJohnson 0:404dae88af71 69 };
MartinJohnson 0:404dae88af71 70
MartinJohnson 0:404dae88af71 71 //*****************************************************************************
MartinJohnson 0:404dae88af71 72 // Function mthSine(u16 angle)
MartinJohnson 0:404dae88af71 73 //
MartinJohnson 0:404dae88af71 74 // Return sine value from 'angle' parameter in degrees. The returned value
MartinJohnson 0:404dae88af71 75 // is multiplied by 10000 (-10000..0..10000). The angle must be an integer
MartinJohnson 0:404dae88af71 76 // value from 0 to 359.
MartinJohnson 0:404dae88af71 77 //
MartinJohnson 0:404dae88af71 78 // parameters:
MartinJohnson 0:404dae88af71 79 // angle Angle value in degrees
MartinJohnson 0:404dae88af71 80 //
MartinJohnson 0:404dae88af71 81 // return: Sine
MartinJohnson 0:404dae88af71 82 //*****************************************************************************
MartinJohnson 0:404dae88af71 83 i16 mthSin(u16 angle)
MartinJohnson 0:404dae88af71 84 {
MartinJohnson 0:404dae88af71 85 u16 a = (angle % 359);
MartinJohnson 0:404dae88af71 86
MartinJohnson 0:404dae88af71 87 return SineTable[a];
MartinJohnson 0:404dae88af71 88 }
MartinJohnson 0:404dae88af71 89
MartinJohnson 0:404dae88af71 90 //*****************************************************************************
MartinJohnson 0:404dae88af71 91 // Function mthCos(u16 angle)
MartinJohnson 0:404dae88af71 92 //
MartinJohnson 0:404dae88af71 93 // Return cosine value from 'angle' parameter in degrees. The returned
MartinJohnson 0:404dae88af71 94 // value is multiplied by 10000 (-10000..0..10000). The angle must be an
MartinJohnson 0:404dae88af71 95 // integer value from 0 to 359
MartinJohnson 0:404dae88af71 96 //
MartinJohnson 0:404dae88af71 97 // parameters:
MartinJohnson 0:404dae88af71 98 // angle Angle value in degrees
MartinJohnson 0:404dae88af71 99 //
MartinJohnson 0:404dae88af71 100 // return: Cosine
MartinJohnson 0:404dae88af71 101 //*****************************************************************************
MartinJohnson 0:404dae88af71 102 i16 mthCos(u16 angle)
MartinJohnson 0:404dae88af71 103 {
MartinJohnson 0:404dae88af71 104 u16 a = ((angle + 90) % 359);
MartinJohnson 0:404dae88af71 105
MartinJohnson 0:404dae88af71 106 return SineTable[a];
MartinJohnson 0:404dae88af71 107 }
MartinJohnson 0:404dae88af71 108
MartinJohnson 0:404dae88af71 109