Test Tone - 440Hz sinus
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main.cpp
00001 #include "mbed.h" 00002 00003 AnalogOut sine (p18); 00004 00005 00006 const float j = 180; 00007 int i = 0; 00008 int lp =0; 00009 float output=0; 00010 00011 float SIN_LUT[(int)j]= 00012 00013 {0.0000000000000, 0.0174524064373, 0.0348994967025, 0.0523359562429, 00014 0.0697564737441, 0.0871557427477, 0.1045284632677, 0.1218693434051, 00015 0.1391731009601, 0.1564344650402, 0.1736481776669, 0.1908089953765, 00016 0.2079116908178, 0.2249510543439, 0.2419218955997, 0.2588190451025, 00017 0.2756373558170, 0.2923717047227, 0.3090169943749, 0.3255681544572, 00018 0.3420201433257, 0.3583679495453, 0.3746065934159, 0.3907311284893, 00019 0.4067366430758, 0.4226182617407, 0.4383711467891, 0.4539904997395, 00020 0.4694715627859, 0.4848096202463, 0.5000000000000, 0.5150380749101, 00021 0.5299192642332, 0.5446390350150, 0.5591929034707, 0.5735764363510, 00022 0.5877852522925, 0.6018150231520, 0.6156614753257, 0.6293203910498, 00023 0.6427876096865, 0.6560590289905, 0.6691306063589, 0.6819983600625, 00024 0.6946583704590, 0.7071067811865, 0.7193398003387, 0.7313537016192, 00025 0.7431448254774, 0.7547095802228, 0.7660444431190, 0.7771459614570, 00026 0.7880107536067, 0.7986355100473, 0.8090169943749, 0.8191520442890, 00027 0.8290375725550, 0.8386705679454, 0.8480480961564, 0.8571673007021, 00028 0.8660254037844, 0.8746197071394, 0.8829475928589, 0.8910065241884, 00029 0.8987940462992, 0.9063077870367, 0.9135454576426, 0.9205048534524, 00030 0.9271838545668, 0.9335804264972, 0.9396926207859, 0.9455185755993, 00031 0.9510565162952, 0.9563047559630, 0.9612616959383, 0.9659258262891, 00032 0.9702957262760, 0.9743700647852, 0.9781476007338, 0.9816271834477, 00033 0.9848077530122, 0.9876883405951, 0.9902680687416, 0.9925461516413, 00034 0.9945218953683, 0.9961946980917, 0.9975640502598, 0.9986295347546, 00035 0.9993908270191, 0.9998476951564, 1.0000000000000, 0.9998476951564, 00036 0.9993908270191, 0.9986295347546, 0.9975640502598, 0.9961946980917, 00037 0.9945218953683, 0.9925461516413, 0.9902680687416, 0.9876883405951, 00038 0.9848077530122, 0.9816271834477, 0.9781476007338, 0.9743700647852, 00039 0.9702957262760, 0.9659258262891, 0.9612616959383, 0.9563047559630, 00040 0.9510565162952, 0.9455185755993, 0.9396926207859, 0.9335804264972, 00041 0.9271838545668, 0.9205048534524, 0.9135454576426, 0.9063077870367, 00042 0.8987940462992, 0.8910065241884, 0.8829475928589, 0.8746197071394, 00043 0.8660254037844, 0.8571673007021, 0.8480480961564, 0.8386705679454, 00044 0.8290375725550, 0.8191520442890, 0.8090169943749, 0.7986355100473, 00045 0.7880107536067, 0.7771459614570, 0.7660444431190, 0.7547095802228, 00046 0.7431448254774, 0.7313537016192, 0.7193398003387, 0.7071067811865, 00047 0.6946583704590, 0.6819983600625, 0.6691306063589, 0.6560590289905, 00048 0.6427876096865, 0.6293203910498, 0.6156614753257, 0.6018150231520, 00049 0.5877852522925, 0.5735764363510, 0.5591929034707, 0.5446390350150, 00050 0.5299192642332, 0.5150380749101, 0.5000000000000, 0.4848096202463, 00051 0.4694715627859, 0.4539904997395, 0.4383711467891, 0.4226182617407, 00052 0.4067366430758, 0.3907311284893, 0.3746065934159, 0.3583679495453, 00053 0.3420201433257, 0.3255681544572, 0.3090169943749, 0.2923717047227, 00054 0.2756373558170, 0.2588190451025, 0.2419218955997, 0.2249510543439, 00055 0.2079116908178, 0.1908089953765, 0.1736481776669, 0.1564344650402, 00056 0.1391731009601, 0.1218693434051, 0.1045284632677, 0.0871557427477, 00057 0.0697564737441, 0.0523359562429, 0.0348994967025, 0.0174524064373}; 00058 00059 00060 int main() { 00061 00062 00063 while (1) { 00064 00065 if (i>(j-1)) { 00066 i=0; 00067 } 00068 00069 if (lp == 70) { 00070 00071 lp=0; 00072 output = SIN_LUT[i]; 00073 sine = output; 00074 i++; 00075 00076 } 00077 00078 lp++; 00079 00080 } 00081 00082 } 00083
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Kamil Ondrousek