AWR1843BOOST: DSP_fft32x32() 函數導致程式崩潰與記憶體異常

yuen cheng

Part Number: AWR1843BOOST

我目前正在開發一個客製化的專案，在 interFrameProcessing() 函數中調用了 DSP_fft32x32()，但在執行該函數時，程式運行數次（隨機次數）後便會發生崩潰。

在調試過程中，我發現了一個奇怪的現象：DSP_fft32x32() 的其中一個輸入參數 obj->pVitalSignsBuffer_Cplx 的 .imag 成員值會被改變。然而，根據我的理解，DSP_fft32x32() 不應該修改 obj->pVitalSignsBuffer_Cplx 的內容。當我註解掉 DSP_fft32x32() 後，obj->pVitalSignsBuffer_Cplx 的 .imag 參數能夠保持為零。

我已經檢查了記憶體衝突或覆蓋的問題，從 Expressions 監視記憶體分配時，發現以下數據結構的記憶體分配皆為正常：

obj->pVitalSignsSpectrumTwiddle32x32
obj->pVitalSignsBuffer_Cplx
obj->pVitalSigns_SpectrumCplx
它們的數據長度皆為 1024，obj->breathingWfm_Spectrum_FftSize 也已設定為 1024。

此外，當我註解掉 DSP_fft32x32() 時，obj->pVitalSignsSpectrumTwiddle32x32 與 obj->pVitalSignsBuffer_Cplx 內的數據都維持正常，且程式不會崩潰。因此，我推測問題可能與 DSP_fft32x32() 的執行有關。

想請教：

這樣的問題可能是什麼原因導致的？
還有哪些方式可以進一步排查？
針對 Console 顯示的錯誤碼，有什麼方法可以更精確地解讀？

以下提供相關的錯誤訊息與程式碼片段，謝謝！

DSP_fft32x32()函式呼叫:

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    // Input to the FFT needs to be complex
    memset((uint8_t *)obj->pVitalSignsBuffer_Cplx, 0, obj->breathingWfm_Spectrum_FftSize * sizeof(cmplx32ReIm_t));
    for (loopIndexBuffer = 0; loopIndexBuffer < obj->circularBufferSizeBreath; loopIndexBuffer++)
    {
        obj->pVitalSignsBuffer_Cplx[loopIndexBuffer].real = (int32_t) obj->scale_breathingWfm*obj->pVitalSigns_Breath_CircularBuffer[loopIndexBuffer];
        obj->pVitalSignsBuffer_Cplx[loopIndexBuffer].imag=0;
    }
//     Input is overwritten by the DSP_fft32x32 function
    DSP_fft32x32((int32_t*) obj->pVitalSignsSpectrumTwiddle32x32,
                 obj->breathingWfm_Spectrum_FftSize,
                 (int32_t*) obj->pVitalSignsBuffer_Cplx,
                 (int32_t*) obj->pVitalSigns_SpectrumCplx);
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    // Input to the FFT needs to be complex
    memset((uint8_t *)obj->pVitalSignsBuffer_Cplx, 0, obj->breathingWfm_Spectrum_FftSize * sizeof(cmplx32ReIm_t));
    for (loopIndexBuffer = 0; loopIndexBuffer < obj->circularBufferSizeBreath; loopIndexBuffer++)
    {

        obj->pVitalSignsBuffer_Cplx[loopIndexBuffer].real = (int32_t) obj->scale_breathingWfm*obj->pVitalSigns_Breath_CircularBuffer[loopIndexBuffer];
        obj->pVitalSignsBuffer_Cplx[loopIndexBuffer].imag=0;
    }

//     Input is overwritten by the DSP_fft32x32 function
    DSP_fft32x32((int32_t*) obj->pVitalSignsSpectrumTwiddle32x32,
                 obj->breathingWfm_Spectrum_FftSize,
                 (int32_t*) obj->pVitalSignsBuffer_Cplx,
                 (int32_t*) obj->pVitalSigns_SpectrumCplx);

Console錯誤碼:

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A0=0xfffffd48 A1=0x0
A2=0x814a08 A3=0x0
A4=0x818f80 A5=0x0
A6=0x200c0e90 A7=0x814b00
A8=0x2 A9=0x7ec8f4
A10=0x1 A11=0x7f2ca0
A12=0x7f7e36 A13=0x818040
A14=0x0 A15=0x7eb410
A16=0x0 A17=0x7f6b94
A18=0x80 A19=0x0
A20=0x0 A21=0x80
A22=0x818f80 A23=0x0
A24=0x7ed560 A25=0x0
A26=0x2 A27=0x817a08
A28=0x1 A29=0x0
A30=0x4783 A31=0x818438
B0=0x0 B1=0x3
B2=0x0 B3=0x7eb644
B4=0xfffffffa B5=0x4c
B6=0x1 B7=0x0
B8=0x0 B9=0x817c28
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

A0=0xfffffd48 A1=0x0
A2=0x814a08 A3=0x0
A4=0x818f80 A5=0x0
A6=0x200c0e90 A7=0x814b00
A8=0x2 A9=0x7ec8f4
A10=0x1 A11=0x7f2ca0
A12=0x7f7e36 A13=0x818040
A14=0x0 A15=0x7eb410
A16=0x0 A17=0x7f6b94
A18=0x80 A19=0x0
A20=0x0 A21=0x80
A22=0x818f80 A23=0x0
A24=0x7ed560 A25=0x0
A26=0x2 A27=0x817a08
A28=0x1 A29=0x0
A30=0x4783 A31=0x818438
B0=0x0 B1=0x3
B2=0x0 B3=0x7eb644
B4=0xfffffffa B5=0x4c
B6=0x1 B7=0x0
B8=0x0 B9=0x817c28
B10=0x80 B11=0x0
B12=0x0 B13=0x0
B14=0x7ed560 B15=0x4783
B16=0x0 B17=0x7
B18=0x14010103 B19=0x0
B20=0x300 B21=0x0
B22=0x0 B23=0x0
B24=0x0 B25=0x0
B26=0x0 B27=0x0
B28=0x0 B29=0x0
B30=0x80 B31=0x0
NTSR=0xffffffff
ITSR=0x0
IRP=0x0
SSR=0x1
AMR=0x812cb1
RILC=0x818da8
ILC=0x8187e4
Exception at 0xe00214
EFR=0x2 NRP=0xe00214
Internal exception: IERR=0x180
Loop buffer exception
Missed stall exception
{module#23}: line 256: error {id:0xb0000, args:[0x8184d4, 0x4783]}
xdc.runtime.Error.raise: terminating execution

記憶體分配程式碼:

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    /************************/
    /* Static L3 allocation */
    /************************/
    /* Only for VSD subFrame */
    obj = &objIn[1];
    volatile uint32_t prevL3_end = 0U;
    for(subFrameIndex = 0; subFrameIndex < NUM_SUBFRAMES; subFrameIndex++)
    {
        if(prevL3_end < l3HeapEndLocationForSubframe[subFrameIndex])
        {
            prevL3_end = l3HeapEndLocationForSubframe[subFrameIndex];
        }
    }
    MMW_ALLOC_BUF(pRangeProfileCplx, cmplx16ReIm_t,
                  prevL3_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->numRangeBins);
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

    /************************/
    /* Static L3 allocation */
    /************************/

    /* Only for VSD subFrame */
    obj = &objIn[1];

    volatile uint32_t prevL3_end = 0U;

    for(subFrameIndex = 0; subFrameIndex < NUM_SUBFRAMES; subFrameIndex++)
    {
        if(prevL3_end < l3HeapEndLocationForSubframe[subFrameIndex])
        {
            prevL3_end = l3HeapEndLocationForSubframe[subFrameIndex];
        }
    }

    MMW_ALLOC_BUF(pRangeProfileCplx, cmplx16ReIm_t,
                  prevL3_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->numRangeBins);

    MMW_ALLOC_BUF(pVitalSigns_Breath_CircularBuffer, float,
                  pRangeProfileCplx_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->circularBufferSizeBreath);

    MMW_ALLOC_BUF(pVitalSigns_Heart_CircularBuffer, float,
                  pVitalSigns_Breath_CircularBuffer_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->circularBufferSizeHeart);

    MMW_ALLOC_BUF(pMotionCircularBuffer, float,
                  pVitalSigns_Heart_CircularBuffer_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->motionDetection_BlockSize);

    MMW_ALLOC_BUF(pDopplerWindow, float,
                  pMotionCircularBuffer_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  DOPPLER_WINDOW_SIZE);

    MMW_ALLOC_BUF(pVitalSignsSpectrumTwiddle32x32, cmplx32ReIm_t,
                  pDopplerWindow_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->breathingWfm_Spectrum_FftSize);

    MMW_ALLOC_BUF(pVitalSignsBuffer_Cplx, cmplx32ReIm_t,
                  pVitalSignsSpectrumTwiddle32x32_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->breathingWfm_Spectrum_FftSize);

    MMW_ALLOC_BUF(pVitalSigns_SpectrumCplx, cmplx32ReIm_t,
                  pVitalSignsBuffer_Cplx_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->breathingWfm_Spectrum_FftSize);

    MMW_ALLOC_BUF(pVitalSigns_Breath_AbsSpectrum, float,
                  pVitalSigns_SpectrumCplx_end, SYS_MEMORY_ALLOC_DOUBLE_WORD_ALIGN_DSP,
                  obj->breathingWfm_Spectrum_FftSize);

在Memory Brower查看obj->pVitalSignsBuffer_Cplx中的數據, .imag項出現被DSP_fft32x32更改的問題: