问题描述:
AD采样信号为电信号频率为50HZ，采样速率为6.4K，采样128个 点，做FFT变换，移植程序编译无问题，关键代码如下：
Uint16 RFFTin1Buff[RFFT_SIZE]; //Buffer alignment for the input array,
#pragma DATA_SECTION(RFFTin1Buff,"RFFTdata1");
#pragma DATA_SECTION(RFFToutBuff,"RFFTdata2");
float RFFToutBuff[RFFT_SIZE]; //Output of FFT here if RFFT_STAGES is EVEN
#pragma DATA_SECTION(RFFTmagBuff,"RFFTdata3");
float RFFTmagBuff[RFFT_SIZE/2+1]; //Additional Buffer used in Magnitude calc
#pragma DATA_SECTION(RFFTF32Coef,"RFFTdata4");
float RFFTF32Coef[RFFT_SIZE];
rfft_adc.Tail = &rfft.OutBuf; //Link the RFFT_ADC_F32_STRUCT to
//RFFT_F32_STRUCT. Tail pointer of
//RFFT_ADC_F32_STRUCT is passed to
//the OutBuf pointer of RFFT_F32_STRUCT
rfft.FFTSize = RFFT_SIZE; //Real FFT size
rfft.FFTStages = RFFT_STAGES; //Real FFT stages
rfft_adc.InBuf = &RFFTin1Buff[0]; //Input buffer
//rfft.InBuf = &nAdRxBuf[nType][nPhase][0]; //Input buffer
rfft.OutBuf = &RFFToutBuff[0]; //Output buffer
rfft.CosSinBuf = &RFFTF32Coef[0]; //Twiddle factor
rfft.MagBuf = &RFFTmagBuff[0]; //Magnitude output buffer
//rfft.PhaseBuf =&RFFTphaBuff[0];
RFFT_f32_sincostable(&rfft); //Calculate twiddle factor
//Clean up output buffer
for (i=0; i < RFFT_SIZE; i++)
{
RFFToutBuff[i] = 0;
}
//Clean up magnitude buffer
for (i=0; i < RFFT_SIZE/2; i++)
{
RFFTmagBuff[i] = 0;
}
RFFT_adc_f32(&rfft_adc);
RFFT_f32_mag(&rfft); // Calculate spectrum amplitude
内存分配如下：
RFFTdata1 : > M01SARAM PAGE = 1 ALIGN(256)
RFFTdata2 : > M01SARAM PAGE = 1
RFFTdata3 : > M01SARAM PAGE = 1
RFFTdata4 : > M01SARAM PAGE = 1
采样一组数据为：
[0] unsigned short 1479 0x00000400@Data
[1] unsigned short 1487 0x00000401@Data
[2] unsigned short 1523 0x00000402@Data
[3] unsigned short 1553 0x00000403@Data
[4] unsigned short 1587 0x00000404@Data
[5] unsigned short 1621 0x00000405@Data
[6] unsigned short 1655 0x00000406@Data
[7] unsigned short 1711 0x00000407@Data
[8] unsigned short 1760 0x00000408@Data
[9] unsigned short 1784 0x00000409@Data
[10] unsigned short 1814 0x0000040A@Data
[11] unsigned short 1869 0x0000040B@Data
[12] unsigned short 1890 0x0000040C@Data
[13] unsigned short 1952 0x0000040D@Data
[14] unsigned short 1984 0x0000040E@Data
[15] unsigned short 2024 0x0000040F@Data
[16] unsigned short 2072 0x00000410@Data
[17] unsigned short 2104 0x00000411@Data
[18] unsigned short 2148 0x00000412@Data
[19] unsigned short 2173 0x00000413@Data
[20] unsigned short 2206 0x00000414@Data
[21] unsigned short 2245 0x00000415@Data
[22] unsigned short 2308 0x00000416@Data
[23] unsigned short 2348 0x00000417@Data
[24] unsigned short 2367 0x00000418@Data
[25] unsigned short 2429 0x00000419@Data
[26] unsigned short 2434 0x0000041A@Data
[27] unsigned short 2502 0x0000041B@Data
[28] unsigned short 2536 0x0000041C@Data
[29] unsigned short 2576 0x0000041D@Data
[30] unsigned short 2603 0x0000041E@Data
[31] unsigned short 2630 0x0000041F@Data
[32] unsigned short 2687 0x00000420@Data
[33] unsigned short 2712 0x00000421@Data
[34] unsigned short 2699 0x00000422@Data
[35] unsigned short 2739 0x00000423@Data
[36] unsigned short 2752 0x00000424@Data
[37] unsigned short 2789 0x00000425@Data
[38] unsigned short 2816 0x00000426@Data
[39] unsigned short 2845 0x00000427@Data
[40] unsigned short 2854 0x00000428@Data
[41] unsigned short 2884 0x00000429@Data
[42] unsigned short 2890 0x0000042A@Data
[43] unsigned short 2903 0x0000042B@Data
[44] unsigned short 2901 0x0000042C@Data
[45] unsigned short 2917 0x0000042D@Data
[46] unsigned short 2942 0x0000042E@Data
[47] unsigned short 2933 0x0000042F@Data
[48] unsigned short 2917 0x00000430@Data
[49] unsigned short 2914 0x00000431@Data
[50] unsigned short 2919 0x00000432@Data
[51] unsigned short 2919 0x00000433@Data
[52] unsigned short 2929 0x00000434@Data
[53] unsigned short 2924 0x00000435@Data
[54] unsigned short 2901 0x00000436@Data
[55] unsigned short 2895 0x00000437@Data
[56] unsigned short 2881 0x00000438@Data
[57] unsigned short 2872 0x00000439@Data
[58] unsigned short 2858 0x0000043A@Data
[59] unsigned short 2837 0x0000043B@Data
[60] unsigned short 2816 0x0000043C@Data
[61] unsigned short 2779 0x0000043D@Data
[62] unsigned short 2744 0x0000043E@Data
[63] unsigned short 2725 0x0000043F@Data
[64] unsigned short 2699 0x00000440@Data
[65] unsigned short 2670 0x00000441@Data
[66] unsigned short 2633 0x00000442@Data
[67] unsigned short 2612 0x00000443@Data
[68] unsigned short 2561 0x00000444@Data
[69] unsigned short 2553 0x00000445@Data
[70] unsigned short 2515 0x00000446@Data
[71] unsigned short 2485 0x00000447@Data
[72] unsigned short 2451 0x00000448@Data
[73] unsigned short 2415 0x00000449@Data
[74] unsigned short 2365 0x0000044A@Data
[75] unsigned short 2322 0x0000044B@Data
[76] unsigned short 2296 0x0000044C@Data
[77] unsigned short 2221 0x0000044D@Data
[78] unsigned short 2191 0x0000044E@Data
[79] unsigned short 2171 0x0000044F@Data
[80] unsigned short 2129 0x00000450@Data
[81] unsigned short 2066 0x00000451@Data
[82] unsigned short 2019 0x00000452@Data
[83] unsigned short 1989 0x00000453@Data
[84] unsigned short 1953 0x00000454@Data
[85] unsigned short 1912 0x00000455@Data
[86] unsigned short 1890 0x00000456@Data
[87] unsigned short 1855 0x00000457@Data
[88] unsigned short 1809 0x00000458@Data
[89] unsigned short 1772 0x00000459@Data
[90] unsigned short 1728 0x0000045A@Data
[91] unsigned short 1703 0x0000045B@Data
[92] unsigned short 1645 0x0000045C@Data
[93] unsigned short 1647 0x0000045D@Data
[94] unsigned short 1594 0x0000045E@Data
[95] unsigned short 1555 0x0000045F@Data
[96] unsigned short 1524 0x00000460@Data
[97] unsigned short 1497 0x00000461@Data
[98] unsigned short 1465 0x00000462@Data
[99] unsigned short 1451 0x00000463@Data
[100] unsigned short 1395 0x00000464@Data
[101] unsigned short 1402 0x00000465@Data
[102] unsigned short 1373 0x00000466@Data
[103] unsigned short 1349 0x00000467@Data
[104] unsigned short 1323 0x00000468@Data
[105] unsigned short 1301 0x00000469@Data
[106] unsigned short 1280 0x0000046A@Data
[107] unsigned short 1271 0x0000046B@Data
[108] unsigned short 1259 0x0000046C@Data
[109] unsigned short 1267 0x0000046D@Data
[110] unsigned short 1251 0x0000046E@Data
[111] unsigned short 1238 0x0000046F@Data
[112] unsigned short 1231 0x00000470@Data
[113] unsigned short 1229 0x00000471@Data
[114] unsigned short 1248 0x00000472@Data
[115] unsigned short 1265 0x00000473@Data
[116] unsigned short 1255 0x00000474@Data
[117] unsigned short 1273 0x00000475@Data
[118] unsigned short 1286 0x00000476@Data
[119] unsigned short 1287 0x00000477@Data
[120] unsigned short 1316 0x00000478@Data
[121] unsigned short 1321 0x00000479@Data
[122] unsigned short 1346 0x0000047A@Data
[123] unsigned short 1348 0x0000047B@Data
[124] unsigned short 1377 0x0000047C@Data
[125] unsigned short 1406 0x0000047D@Data
[126] unsigned short 1421 0x0000047E@Data
[127] unsigned short 1453 0x0000047F@Data
FFT变换输出数据为：
[0] float 65.34824 0x00000140@Data
[1] float -9.631418 0x00000142@Data
[2] float -0.02887861 0x00000144@Data
[3] float 0.03526003 0x00000146@Data
[4] float 0.0307181 0x00000148@Data
[5] float -0.03100358 0x0000014A@Data
[6] float -0.07209428 0x0000014C@Data
[7] float -0.001066721 0x0000014E@Data
[8] float -0.05202879 0x00000150@Data
[9] float 0.05837662 0x00000152@Data
[10] float -0.01612341 0x00000154@Data
[11] float -0.007724344 0x00000156@Data
[12] float 0.01002017 0x00000158@Data
[13] float 0.01638556 0x0000015A@Data
[14] float -0.002328807 0x0000015C@Data
[15] float 0.009493084 0x0000015E@Data
[16] float 0.03805744 0x00000160@Data
[17] float -0.002856554 0x00000162@Data
[18] float -0.01199929 0x00000164@Data
[19] float 0.02020341 0x00000166@Data
[20] float 0.01023416 0x00000168@Data
[21] float -0.006184662 0x0000016A@Data
[22] float 0.02308763 0x0000016C@Data
[23] float -0.02422791 0x0000016E@Data
[24] float -0.004411316 0x00000170@Data
[25] float -0.03132496 0x00000172@Data
[26] float -0.02338695 0x00000174@Data
[27] float 0.01237797 0x00000176@Data
[28] float 0.009625752 0x00000178@Data
[29] float 0.006905713 0x0000017A@Data
[30] float 0.004603505 0x0000017C@Data
[31] float 0.0001732288 0x0000017E@Data
[32] float 0.003417969 0x00000180@Data
[33] float -0.01281227 0x00000182@Data
[34] float 0.02575011 0x00000184@Data
[35] float 0.007717508 0x00000186@Data
[36] float 0.01370875 0x00000188@Data
[37] float 0.02029963 0x0000018A@Data
[38] float -0.01971427 0x0000018C@Data
[39] float 0.01804638 0x0000018E@Data
[40] float 0.01907975 0x00000190@Data
[41] float -0.006784829 0x00000192@Data
[42] float -0.008244671 0x00000194@Data
[43] float -0.02216032 0x00000196@Data
[44] float 0.01588557 0x00000198@Data
[45] float -0.02002975 0x0000019A@Data
[46] float 0.001720885 0x0000019C@Data
[47] float 0.03543103 0x0000019E@Data
[48] float 0.03080548 0x000001A0@Data
[49] float 0.006362881 0x000001A2@Data
[50] float -0.01243426 0x000001A4@Data
[51] float 0.01023414 0x000001A6@Data
[52] float 0.01674686 0x000001A8@Data
[53] float -0.0265543 0x000001AA@Data
[54] float -0.0277766 0x000001AC@Data
[55] float -0.01059378 0x000001AE@Data
[56] float 0.01489369 0x000001B0@Data
[57] float 0.005655682 0x000001B2@Data
[58] float 0.003807224 0x000001B4@Data
[59] float 0.01579418 0x000001B6@Data
[60] float -0.02879529 0x000001B8@Data
[61] float 0.01726831 0x000001BA@Data
[62] float 0.03507503 0x000001BC@Data
[63] float 0.005178928 0x000001BE@Data
[64] float -0.04908752 0x000001C0@Data
[65] float -0.001641273 0x000001C2@Data
[66] float -0.00107296 0x000001C4@Data
[67] float -0.01294239 0x000001C6@Data
[68] float -0.01283826 0x000001C8@Data
[69] float 0.001250427 0x000001CA@Data
[70] float -0.01993993 0x000001CC@Data
[71] float 0.0005411981 0x000001CE@Data
[72] float -0.0006272644 0x000001D0@Data
[73] float 0.03577883 0x000001D2@Data
[74] float -0.001234009 0x000001D4@Data
[75] float 0.007307775 0x000001D6@Data
[76] float -0.01245969 0x000001D8@Data
[77] float -0.006627551 0x000001DA@Data
[78] float 0.03216821 0x000001DC@Data
[79] float 0.0215433 0x000001DE@Data
[80] float -0.01269056 0x000001E0@Data
[81] float -0.01031196 0x000001E2@Data
[82] float 0.02048934 0x000001E4@Data
[83] float 0.01857535 0x000001E6@Data
[84] float 0.006955497 0x000001E8@Data
[85] float -0.0007593818 0x000001EA@Data
[86] float 0.007652639 0x000001EC@Data
[87] float -0.001153965 0x000001EE@Data
[88] float 0.01452125 0x000001F0@Data
[89] float -0.008504745 0x000001F2@Data
[90] float 0.02111603 0x000001F4@Data
[91] float -0.03236639 0x000001F6@Data
[92] float -0.02126778 0x000001F8@Data
[93] float 0.02617272 0x000001FA@Data
[94] float -0.01106206 0x000001FC@Data
[95] float -0.01146177 0x000001FE@Data
[96] float 0.004640579 0x00000200@Data
[97] float 0.003388368 0x00000202@Data
[98] float 0.03247364 0x00000204@Data
[99] float -0.005977417 0x00000206@Data
[100] float -0.01928991 0x00000208@Data
[101] float 0.04808921 0x0000020A@Data
[102] float 0.008062636 0x0000020C@Data
[103] float -0.01837104 0x0000020E@Data
[104] float -0.009296702 0x00000210@Data
[105] float 0.001716282 0x00000212@Data
[106] float 0.03442863 0x00000214@Data
[107] float 0.01697574 0x00000216@Data
[108] float -0.03104363 0x00000218@Data
[109] float 0.02733755 0x0000021A@Data
[110] float -0.05490025 0x0000021C@Data
[111] float -0.01080309 0x0000021E@Data
[112] float 0.03859232 0x00000220@Data
[113] float 0.02467327 0x00000222@Data
[114] float 0.02073797 0x00000224@Data
[115] float -0.003341769 0x00000226@Data
[116] float 0.01668616 0x00000228@Data
[117] float 0.01998947 0x0000022A@Data
[118] float -0.006949434 0x0000022C@Data
[119] float -0.02624151 0x0000022E@Data
[120] float 0.05565389 0x00000230@Data
[121] float 0.02429936 0x00000232@Data
[122] float 0.02009803 0x00000234@Data
[123] float 0.03920547 0x00000236@Data
[124] float 0.02698009 0x00000238@Data
[125] float -0.04455571 0x0000023A@Data
[126] float -0.01507789 0x0000023C@Data
[127] float -8.929353 0x0000023E@Data
请帮我看看，问题出在哪？
