如何stm32输出正弦波

准备工作

1. 硬件准备：确保你的STM32开发板上有一个定时器（如TIM2或TIM3）可以用于PWM输出。

2. 软件准备：使用STM32CubeMX或HAL库来配置定时器和PWM。

步骤

1. 配置时钟和定时器

使用STM32CubeMX或HAL库配置以下参数：

选择一个定时器（如TIM2）。

设置定时器的时钟源。

设置预分频器以获得所需的定时器时钟频率。

设置自动重装载寄存器以设置PWM周期。

配置PWM模式，确保使用正确的极性和占空比。

2. 创建查找表

正弦波可以用一个查找表来表示，该查找表包含正弦波不同点的值。以下是一个简单的查找表示例：

```c

const uint16_t sineTable[256] = {

0, 6, 12, 18, 24, 29, 34, 39, 43, 47, 51, 55, 58, 61, 63, 65,

66, 67, 68, 68, 69, 69, 69, 69, 69, 69, 69, 69, 68, 68, 67, 66,

65, 63, 61, 59, 57, 54, 51, 47, 43, 39, 35, 31, 27, 23, 19, 15,

11, 7, 3, 0, -3, -7, -11, -15, -19, -23, -27, -31, -35, -39, -43, -47,

-51, -55, -59, -63, -67, -70, -73, -76, -79, -82, -85, -88, -91, -94, -97, -100,

-103, -106, -109, -112, -115, -118, -121, -124, -127, -130, -133, -136, -139, -142, -145, -148,

-151, -154, -157, -160, -163, -166, -169, -172, -175, -178, -181, -184, -187, -190, -193, -196,

-199, -202, -205, -208, -211, -214, -217, -220, -223, -226, -229, -232, -235, -238, -241, -244,

-247, -250, -253, -256, -259, -262, -265, -268, -271, -274, -277, -280, -283, -286, -289, -292,

-295, -298, -301, -304, -307, -310, -313, -316, -319, -322, -325, -328, -331, -334, -337, -340,

-343, -346, -349, -352, -355, -358, -361, -364, -367, -370, -373, -376, -379, -382, -385, -388,

-391, -394, -397, -400, -403, -406, -409, -412, -415, -418, -421, -424, -427, -430, -433, -436,

-439, -442, -445, -448, -451, -454, -457, -460, -463, -466, -469, -472, -475, -478, -481, -484,

-487, -490, -493, -496, -499, -502, -505, -508, -511, -514, -517, -520, -523, -526, -529, -532,

-535, -538, -541, -544, -547, -550, -553, -556, -559, -562, -565, -568, -571, -574, -577, -580,

-583, -586, -589, -592, -595, -598, -601, -604, -607, -610, -613, -616, -619, -622, -625, -628,

-631, -634, -637, -640, -643, -646, -649, -652, -655, -658, -661, -664, -667, -670, -673, -676,

-679, -682, -685, -688, -691, -694, -697, -700, -703, -706, -709, -712, -715, -718, -721, -724,

-727, -730, -733, -736, -739, -742, -745, -748, -751, -754, -757, -760, -763, -766, -769, -772,

-775, -778, -781, -784, -787, -790, -793, -796, -799, -802, -805, -808, -811, -814, -817, -820,

-823, -826, -829, -832, -835, -838, -841, -844, -847, -850, -853, -856, -859, -862, -865, -868,

-871, -874, -877, -880, -883, -886, -889, -892, -895, -898, -901, -904, -907, -910, -913, -916,

-919, -922, -925, -928, -931, -934, -937, -940, -943, -946, -949, -952, -955, -958, -961, -964,

-967, -970, -973, -976, -979, -982, -985, -988, -991, -994, -997, -1000, -1003, -1006, -1009, -1012,

-1015, -1018, -1021, -1024, -1027, -1030, -1033, -1036, -1039, -1042, -1045, -1048, -1051, -1054, -1057,

-1060, -1063, -1066, -1069, -1072, -1075, -1078, -1081, -1084, -1087, -1090, -1093, -1096, -1099, -1102,

-1105, -1108, -1111, -1114, -1117, -1120, -1123, -1126, -1129, -1132, -1135, -1138, -1141, -1144, -1147,

-1150, -1153, -1156, -1159, -1162, -1165, -1168, -1171, -1174, -1177, -1180, -1183, -1186, -1189, -1192,

-1195, -1198, -1201, -1204, -1207, -1210, -1213, -1216, -1219, -1222, -1225, -1228, -1231, -1234, -1237,

-1240, -1243, -1246, -1249, -1252, -1255, -1258, -1261, -1264, -1267, -1270, -1273, -1276, -1279, -1282,

-1285, -1288, -1291, -1294, -1297, -1300, -1303, -1306, -1309, -1312, -1315, -1318, -1321, -1324, -1327,

-1330, -1333, -1336, -1339, -1342, -1345, -1348, -1351, -1354, -1357, -1360, -1363, -1366, -1369, -1372,

-1375, -1378, -1381, -1384, -1387, -1390, -1393, -1396, -1399, -1402, -1405, -1408, -1411, -1414, -1417,

-1420, -1423, -1426, -1429, -1432, -1435, -1438, -1441, -1444, -1447, -1450, -1453, -1456, -1459, -1462,

-1465, -1468, -1471, -1474, -1477, -1480, -1483, -1486, -1489, -1492, -1495, -1498, -1501, -1504, -1507,

-1510, -1513, -1516, -1519, -1522, -1525, -1528, -1531, -1534, -1537, -1540, -1543, -1546, -1549, -1552,

-1555, -1558, -1561, -1564, -1567, -1570, -1573, -1576, -1579, -1582, -1585, -1588, -1591, -1594, -1597,

-1600, -1603, -1606, -1609, -1612, -1615, -1618, -1621, -1624, -1627, -1630, -1633, -1636, -1639, -1642,

-1645, -1648, -1651, -1654, -1657, -1660, -1663, -1666, -1669, -1672, -1675, -1678, -1681, -1684, -1687,

-1690, -1693, -1696, -1699, -1702, -1705, -1708, -1711, -1714, -1717, -1720, -1723, -1726, -1729, -1732,

-1735, -1738, -1741, -1744, -1747, -1750, -1753, -1756, -1759, -1762, -1765, -1768, -1771, -1774, -1777,

-1780, -1783, -1786, -1789, -1792, -1795, -1798, -1801, -1804, -1807, -1810, -1813, -1816, -1819, -1822,

-1825, -1828, -1831, -1834, -1837, -1840, -1843, -1846, -1849, -1852, -1855, -1858, -1861, -1864, -1867,

-1870, -1873, -1876, -1879, -1882, -1885, -1888, -1891, -1894, -1897, -1900, -1903, -1906, -1909, -1912,

-1915, -1918, -1921, -1924, -1927, -1930, -1933, -1936, -1939, -1942, -1945, -1948, -1951, -1954, -1957,

-1960, -1963, -1966, -1969, -1972, -1975, -1978, -1981, -1984, -1987, -1990, -1993, -1996, -1999, -2002,

-2005, -2008, -2011, -2014, -2017, -2020, -2023, -2026, -2029, -2032, -2035, -2038, -2041, -2044, -2047,

-2050, -2053, -2056, -2059, -2062, -2065, -2068, -2071, -2074, -2077, -2080, -2083, -2086, -2089, -2092,

-2095, -2098, -2101, -2104, -2107, -2110, -2113, -2116, -2119, -2122, -2125, -2128, -2131, -2134, -2137,

-2140, -2143, -2146, -2149, -2152, -2155, -2158, -2161, -2164, -2167, -2170, -2173, -2176, -2179, -2182,

-2185, -2188, -2191, -2194, -2197, -2200, -2203, -2206, -2209, -2212, -2215, -2218, -2221, -2224, -2227,

-2230, -2233, -2236, -2239, -2242, -2245, -2248, -2251, -2254, -2257, -2260, -2263, -2266, -2269, -2272,

-2275, -2278, -2281, -2284, -2287, -2290, -2293, -2296, -2299, -2302, -2305, -2308, -2311, -2314, -2317,

-2320, -2323, -2326, -2329, -2332, -2335, -2338, -2341, -2344, -2347, -2350, -2353, -2356, -2359, -2362,

-2365, -2368, -2371, -2374, -2377, -2380, -2383, -2386, -2389, -2392, -2395, -2398, -2401, -2404, -2407,

-2410, -2413, -2416, -2419, -2422, -2425, -2428, -2431, -2434, -2437, -2440, -2443, -2446, -2449, -2452,

-2455, -2458, -2461, -2464, -2467, -2470, -2473, -2476, -2479, -2482, -2485, -2488, -2491, -2494, -2497,

-2500, -2503, -2506, -2509, -2512, -2515, -2518, -2521, -2524, -2527, -2530, -2533, -2536, -2539, -2542,

-2545, -2548, -2551, -2554, -2557, -2560, -2563, -2566, -2569, -2572, -2575, -2578, -2581, -2584, -2587,

-2590, -2593, -2596, -2599, -2602, -2605, -2608, -2611, -2614, -2617, -2620, -2623, -2626, -2629, -2632,

-2635, -2638, -2641, -2644, -2647, -2650, -2653, -2656, -2659, -2662, -2665, -2668, -2671, -2674, -2677,

-2680, -2683, -2686, -2689, -2692, -2695,