大家好！目前我在写一个三角波DMA+DA输出程序，其中DMA开完成传输中断，程序下载到开发板后，程序在输出三角波的一个周期里多次进入中断。希望大家能够给点建议谢谢。#include "dac.h"
#include "led.h"
#include "adc.h"
#include "project.h"
#include "delay.h"
#define Triangular_Length        6760
const uint16_t Triangle_wave[Triangular_Length] = {
        620,621,622,623,624,625,626,627,628,629,630,631,632,633,634,635,636,637,638,639,
        640,641,642,643,644,645,646,647,648,649,650,651,652,653,654,655,656,657,658,659,
        660,661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676,677,678,679,
        680,681,682,683,684,685,686,687,688,689,690,691,692,693,694,695,696,697,698,699,
        700,701,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716,717,718,719,
        720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,735,736,737,738,739,
        740,741,742,743,744,745,746,747,748,749,750,751,752,753,754,755,756,757,758,759,
        760,761,762,763,764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,
        780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799,
        800,801,802,803,804,805,806,807,808,809,810,811,812,813,814,815,816,817,818,819,
        820,821,822,823,824,825,826,827,828,829,830,831,832,833,834,835,836,837,838,839,
        840,841,842,843,844,845,846,847,848,849,850,851,852,853,854,855,856,857,858,859,
        860,861,862,863,864,865,866,867,868,869,870,871,872,873,874,875,876,877,878,879,
        880,881,882,883,884,885,886,887,888,889,890,891,892,893,894,895,896,897,898,899,
        900,901,902,903,904,905,906,907,908,909,910,911,912,913,914,915,916,917,918,919,
        920,921,922,923,924,925,926,927,928,929,930,931,932,933,934,935,936,937,938,939,
        940,941,942,943,944,945,946,947,948,949,950,951,952,953,954,955,956,957,958,959,960,961,962,963,
        964,965,966,967,968,969,970,971,972,973,974,975,976,977,978,979,980,981,982,983,984,985,986,987,988,989,990,991,992,993,994,995,996,997,998,999,1000,1001,1002,1003,1004,1005,1006,1007,1008,1009,
        1010,1011,1012,1013,1014,1015,1016,1017,1018,1019,1020,1021,1022,1023,1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1040,1041,1042,1043,1044,1045,1046,1047,1048,
        1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,1072,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085,1086,1087,
        1088,1089,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1100,1101,1102,1103,1104,1105,1106,1107,1108,1109,1110,1111,1112,1113,1114,1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126,
        1127,1128,1129,1130,1131,1132,1133,1134,1135,1136,1137,1138,1139,1140,1141,1142,1143,1144,1145,1146,1147,1148,1149,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1160,1161,1162,1163,1164,1165,
        1166,1167,1168,1169,1170,1171,1172,1173,1174,1175,1176,1177,1178,1179,1180,1181,1182,1183,1184,1185,1186,1187,1188,1189,1190,1191,1192,1193,1194,1195,1196,1197,1198,1199,1200,1201,1202,1203,1204,1205,1206,1207,1208,1209,1210,1211,1212,1213,1214,1215,1216,1217,1218,1219,1220,1221,1222,1223,1224,1225,1226,1227,1228,1229,1230,1231,1232,1233,1234,1235,1236,1237,1238,1239,1240,1241,1242,1243,1244,1245,1246,1247,1248,1249,1250,1251,1252,1253,1254,1255,1256,1257,1258,1259,1260,1261,1262,1263,1264,1265,1266,1267,1268,1269,1270,1271,1272,1273,1274,1275,1276,1277,1278,1279,1280,1281,1282,1283,1284,1285,1286,1287,1288,1289,1290,1291,1292,1293,1294,1295,1296,1297,1298,1299,1300,1301,1302,1303,1304,1305,1306,1307,1308,1309,1310,1311,1312,1313,1314,1315,1316,1317,1318,1319,1320,1321,1322,1323,1324,1325,1326,1327,1328,1329,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1340,1341,1342,1343,1344,1345,1346,1347,1348,1349,1350,1351,1352,1353,1354,1355,1356,1357,1358,1359,1360,1361,1362,1363,1364,1365,1366,1367,1368,1369,1370,1371,1372,1373,1374,1375,1376,1377,1378,1379,1380,1381,1382,1383,1384,1385,1386,1387,1388,1389,1390,1391,1392,1393,1394,1395,1396,1397,1398,1399,1400,1401,1402,1403,1404,1405,1406,1407,1408,1409,1410,1411,1412,1413,1414,1415,1416,1417,1418,1419,1420,1421,1422,1423,1424,1425,1426,1427,1428,1429,1430,1431,1432,1433,1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1460,1461,1462,1463,1464,1465,1466,1467,1468,1469,1470,1471,1472,1473,1474,1475,1476,1477,1478,1479,1480,1481,1482,1483,1484,1485,1486,1487,1488,1489,1490,1491,1492,1493,1494,1495,1496,1497,1498,1499,1500,1501,1502,1503,1504,1505,1506,1507,1508,1509,1510,1511,1512,1513,1514,1515,1516,1517,1518,1519,1520,1521,1522,1523,1524,1525,1526,1527,1528,1529,1530,1531,1532,1533,1534,1535,1536,1537,1538,1539,1540,1541,1542,1543,1544,1545,1546,1547,1548,1549,1550,1551,1552,1553,1554,1555,1556,1557,1558,1559,1560,1561,1562,1563,1564,1565,1566,1567,1568,1569,1570,1571,1572,1573,1574,1575,1576,1577,1578,1579,1580,1581,1582,1583,1584,1585,1586,1587,1588,1589,1590,1591,1592,1593,1594,1595,1596,1597,1598,1599,1600,1601,1602,1603,1604,1605,1606,1607,1608,1609,1610,1611,1612,1613,1614,1615,1616,1617,1618,1619,1620,1621,1622,1623,1624,1625,1626,1627,1628,1629,1630,1631,1632,1633,1634,1635,1636,1637,1638,1639,1640,1641,1642,1643,1644,1645,1646,1647,1648,1649,1650,1651,1652,1653,1654,1655,1656,1657,1658,1659,1660,1661,1662,1663,1664,1665,1666,1667,1668,1669,1670,1671,1672,1673,1674,1675,1676,1677,1678,1679,1680,1681,1682,1683,1684,1685,1686,1687,1688,1689,1690,1691,1692,1693,1694,1695,1696,1697,1698,1699,1700,1701,1702,1703,1704,1705,1706,1707,1708,1709,1710,1711,1712,1713,1714,1715,1716,1717,1718,1719,1720,1721,1722,1723,1724,1725,1726,1727,1728,1729,1730,1731,1732,1733,1734,1735,1736,1737,1738,1739,1740,1741,1742,1743,1744,1745,1746,1747,1748,1749,1750,1751,1752,1753,1754,1755,1756,1757,1758,1759,1760,1761,1762,1763,1764,1765,1766,1767,1768,1769,1770,1771,1772,1773,1774,1775,1776,1777,1778,1779,1780,1781,1782,1783,1784,1785,1786,1787,1788,1789,1790,1791,1792,1793,1794,1795,1796,1797,1798,1799,1800,1801,1802,1803,1804,1805,1806,1807,1808,1809,1810,1811,1812,1813,1814,1815,1816,1817,1818,1819,1820,1821,1822,1823,1824,1825,1826,1827,1828,1829,1830,1831,1832,1833,1834,1835,1836,1837,1838,1839,1840,1841,1842,1843,1844,1845,1846,1847,1848,1849,1850,1851,1852,1853,1854,1855,1856,1857,1858,1859,1860,1861,1862,1863,1864,1865,1866,1867,1868,1869,1870,1871,1872,1873,1874,1875,1876,1877,1878,1879,1880,1881,1882,1883,1884,1885,1886,1887,1888,1889,1890,1891,1892,1893,1894,1895,1896,1897,1898,1899,1900,1901,1902,1903,1904,1905,1906,1907,1908,1909,1910,1911,1912,1913,1914,1915,1916,1917,1918,1919,1920,1921,1922,1923,1924,1925,1926,1927,1928,1929,1930,1931,1932,1933,1934,1935,1936,1937,1938,1939,1940,1941,1942,1943,1944,1945,1946,1947,1948,1949,1950,1951,1952,1953,1954,1955,1956,1957,1958,1959,1960,1961,1962,1963,1964,1965,1966,1967,1968,1969,1970,1971,1972,1973,1974,1975,1976,1977,1978,1979,1980,1981,1982,1983,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024,2025,2026,2027,2028,2029,2030,2031,2032,2033,2034,2035,2036,2037,2038,2039,2040,2041,2042,2043,2044,2045,2046,2047,2048,2049,2050,2051,2052,2053,2054,2055,2056,2057,2058,2059,2060,2061,2062,2063,2064,2065,2066,2067,2068,2069,2070,2071,2072,2073,2074,2075,2076,2077,2078,2079,2080,2081,2082,2083,2084,2085,2086,2087,2088,2089,2090,2091,2092,2093,2094,2095,2096,2097,2098,2099,2100,2101,2102,2103,2104,2105,2106,2107,2108,2109,2110,2111,2112,2113,2114,2115,2116,2117,2118,2119,2120,2121,2122,2123,2124,2125,2126,2127,2128,2129,2130,2131,2132,2133,2134,2135,2136,2137,2138,2139,2140,2141,2142,2143,2144,2145,2146,2147,2148,2149,2150,2151,2152,2153,2154,2155,2156,2157,2158,2159,2160,2161,2162,2163,2164,2165,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     
       
};


extern u8 ADC_output_up_I[FFT_LENGTH];
extern u8 ADC_output_up_Q[FFT_LENGTH];
extern u8 ADC_output_down_I[FFT_LENGTH];
extern u8 ADC_output_down_Q[FFT_LENGTH];
extern u16  ADC_output[FFT_LENGTH];
extern u8 state;
u8 it = 0;

  void DAC_Ch1_Triangle_waveConfig(void)
{
  DMA_InitTypeDef DMA_InitStructure;
  DAC_InitTypeDef  DAC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
       
       
        /* 使能DMA1的时钟、使能GPIOA的时钟、使能DAC的时钟 */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);                        
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

  /*将GPIOA的4、5引脚配置为模拟模式 */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
       
        /*DAC通道1设置为T6触发，关闭波形发生器*/
  DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
  DAC_Init(DAC_Channel_1, &DAC_InitStructure);

  /*对DMA1进行配置*/
  DMA_DeInit(DMA1_Stream5);
  DMA_InitStructure.DMA_Channel = DMA_Channel_7;  
  DMA_InitStructure.DMA_PeripheralBaseAddr = 0x00000008 + DAC_Align_12b_R+DAC_BASE;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&Triangle_wave;
  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
  DMA_InitStructure.DMA_BufferSize = Triangular_Length;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA1_Stream5, &DMA_InitStructure);

  /*开启DMA1_Stream5的半堆栈中断关闭与满堆栈中断开启*/
  DMA_ITConfig(DMA1_Stream5, DMA_IT_HT, ENABLE);
//DMA_ITConfig(DMA1_Stream5, DMA_IT_TC, DISABLE);

  NVIC_InitStructure.NVIC_IRQChannel= DMA1_Stream5_IRQn; //中断
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0x01; //抢占优先级1
        NVIC_InitStructure.NVIC_IRQChannelSubPriority=0x03; //子优先级3
        NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
        NVIC_Init(&NVIC_InitStructure);

  DMA_Cmd(DMA1_Stream5, ENABLE);
  DAC_Cmd(DAC_Channel_1, ENABLE);
  DAC_DMACmd(DAC_Channel_1, ENABLE);


       

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//GPIOE时钟
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; //KEY0对应引脚
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化GPIOE4


}
void DMA1_Stream5_IRQHandler(void)
{  
         DMA_ITConfig(DMA1_Stream5, DMA_IT_HT, DISABLE);
        if(it==0)
                it = 1;
        else
                it = 0;
       
        PEout(15)=it;



}