C5505 hwaFFT死活通不了，真怀疑TI的这款DSP本身就是有错误

详细说下你是怎么做的？

是否有参考sprabb6b这篇文档.

参考过

1、CMD文件的配置，如下：

-stack 0x1000 /* PRIMARY STACK SIZE */
-sysstack 0x1000 /* SECONDARY STACK SIZE */
-heap 0x3F80 /* HEAP AREA SIZE */
MEMORY
{
PAGE 0:
MMR: o = 0x000000 l = 0x0000c0 /* 192B Memory Mapped Registers */
DARAM0: o = 0x0000C0 l = 0x001F40 /* 8kB Dual Access RAM 0 */
DARAM1: o = 0x002000 l = 0x006000 /* 8kB Dual Access RAM 1 */
DARAM2: o = 0x008000 l = 0x008000 /* 8kB Dual Access RAM 2 */
// DARAM3: o = 0x00C000 l = 0x002000 /* 8kB Dual Access RAM 5 */
// DARAM4: o = 0x00E000 l = 0x002000 /* 8kB Dual Access RAM 5 */
PAGE 1:
SARAM0: o = 0x010000 l = 0x002000 /* 8kB Single Access RAM 0 */
SARAM1: o = 0x012000 l = 0x002000 /* 8kB Single Access RAM 1 */
SARAM2: o = 0x014000 l = 0x002000 /* 8kB Single Access RAM 2 */
SARAM3: o = 0x016000 l = 0x002000 /* 8kB Single Access RAM 3 */
SARAM4: o = 0x018000 l = 0x004000 /* 8kB Single Access RAM 4 */
//SARAM5: o = 0x01A000 l = 0x002000 /* 8kB Single Access RAM 5 */
SARAM6: o = 0x01C000 l = 0x002000 /* 8kB Single Access RAM 6 */
SARAM7: o = 0x01E000 l = 0x002000 /* 8kB Single Access RAM 7 */
SARAM8: o = 0x020000 l = 0x002000 /* 8kB Single Access RAM 8 */
SARAM9: o = 0x022000 l = 0x002000 /* 8kB Single Access RAM 9 */
SARAM10: o = 0x024000 l = 0x002000 /* 8kB Single Access RAM 10 */
SARAM11: o = 0x026000 l = 0x002000 /* 8kB Single Access RAM 11 */
SARAM12: o = 0x028000 l = 0x002000 /* 8kB Single Access RAM 12 */
SARAM13: o = 0x02A000 l = 0x002000 /* 8kB Single Access RAM 13 */
SARAM14: o = 0x02C000 l = 0x002000 /* 8kB Single Access RAM 14 */
SARAM15: o = 0x02E000 l = 0x002000 /* 8kB Single Access RAM 15 */
SARAM16: o = 0x030000 l = 0x002000 /* 8kB Single Access RAM 16 */
SARAM17: o = 0x032000 l = 0x002000 /* 8kB Single Access RAM 17 */
SARAM18: o = 0x034000 l = 0x002000 /* 8kB Single Access RAM 18 */
SARAM19: o = 0x036000 l = 0x002000 /* 8kB Single Access RAM 19 */
SARAM20: o = 0x038000 l = 0x002000 /* 8kB Single Access RAM 20 */
SARAM21: o = 0x03A000 l = 0x002000 /* 8kB Single Access RAM 21 */
SARAM22: o = 0x03C000 l = 0x002000 /* 8kB Single Access RAM 22 */
SARAM23: o = 0x03E000 l = 0x002000 /* 8kB Single Access RAM 23 */
SARAM24: o = 0x040000 l = 0x002000 /* 8kB Single Access RAM 24 */
SARAM25: o = 0x042000 l = 0x002000 /* 8kB Single Access RAM 25 */
SARAM26: o = 0x044000 l = 0x002000 /* 8kB Single Access RAM 26 */
SARAM27: o = 0x046000 l = 0x002000 /* 8kB Single Access RAM 27 */
SARAM28: o = 0x048000 l = 0x002000 /* 8kB Single Access RAM 28 */
SARAM29: o = 0x04A000 l = 0x002000 /* 8kB Single Access RAM 29 */
SARAM30: o = 0x04C000 l = 0x002000 /* 8kB Single Access RAM 30 */
SARAM31: o = 0x04E000 l = 0x002000 /* 8kB Single Access RAM 31 */

CS0: o = 0x050000 l = 0x7B0000 /* 8MB CS0 external memory space */
CS2: o = 0x800000 l = 0x400000 /* 4MB CS2 external memory space */
CS3: o = 0xC00000 l = 0x200000 /* 2MB CS3 external memory space */
CS4: o = 0xE00000 l = 0x100000 /* 1MB CS4 external memory space */
CS5: o = 0xF00000 l = 0x0E0000 /* 1MB CS5 external memory space */
ROM: o = 0xFE0000 l = 0x01FE00 /* 128kB ROM (MPNMC=0) or CS5 (MPNMC=1) */
VECS: o = 0xFFFE00 l = 0x000200 /* reset vector */
}

SECTIONS
{
.vectors > VECS PAGE 1 /* If MPNMC = 1, remove the NOLOAD directive */
.cinit > DARAM0 PAGE 0
.text > DARAM1 PAGE 0
// .stack > SARAM0 PAGE 1
// .sysstack > SARAM3 PAGE 1
.sysmem > SARAM4 PAGE 1
.data > SARAM6 PAGE 1
.cio > DARAM0 PAGE 0
.bss > SARAM1 PAGE 1
.const > DARAM0 PAGE 0
.switch > DARAM0 PAGE 0
data_br_buf : > DARAM2 PAGE 0/* hwafft Output–bit-reversed data memory allocation */
data_buf : > DARAM2 PAGE 0/* hwafft Input/output static memory allocation */
scratch_buf : > DARAM2 PAGE 0 /* hwafft Intermediate/output static memory allocation */

//data_buf : >DARAM2 PAGE 0
//scratch_buf : >DARAM2 PAGE 0
//data_br_buf : >DARAM2 PAGE 0
}
/* HWAFFT Routines ROM Addresses */
/* (PG 2.0) */
_hwafft_br = 0x00ff6cd6;
_hwafft_8pts = 0x00ff6cea;
_hwafft_16pts = 0x00ff6dd9;
_hwafft_32pts = 0x00ff6f2f;
_hwafft_64pts = 0x00ff7238;
_hwafft_128pts = 0x00ff73cd;
_hwafft_256pts = 0x00ff75de;
_hwafft_512pts = 0x00ff77dc;
_hwafft_1024pts = 0x00ff7a56;

2、HWAFFT相关变量及函数的的定义，如下：

Int32 *data;
Int32 *data_br;
Uint16 fft_flag;
Uint16 scale_flag;
Int32 *scratch;
Uint16 out_sel;
Int32 *result;

#define ALIGNMENT 2*1024
#pragma DATA_SECTION(data_buf, "data_buf");
#pragma DATA_ALIGN (data_buf, ALIGNMENT);
Int32 data_buf[1024];
Int32 *data = data_buf;

#pragma DATA_SECTION(scratch_buf, "scratch_buf");
#pragma DATA_ALIGN (scratch_buf, ALIGNMENT);
Int32 scratch_buf[1024];
Int32 *scratch =scratch_buf;

#pragma DATA_SECTION(data_br_buf, "data_br_buf");
#pragma DATA_ALIGN (data_br_buf, ALIGNMENT);
Int32 data_br_buf[1024];
Int32 *data_br =data_br_buf;

void fft();

void fft(){
fft_flag = FFT_FLAG;
scale_flag = SCALE_FLAG;
data =data_buf;
/* Bit-Reverse 1024-point data, Store into data_br, data_br aligned to
12-least significant binary zeros*/
hwafft_br(data, data_br, DATA_LEN_1024); /* bit-reverse input data,
Destination buffer aligned */
//data = data_br;
//memcpy(data_buf,data_br,sizeof(data_br_buf));
//data = data_buf;
/* Compute 1024-point FFT, scaling enabled. */
// out_sel = hwafft_1024pts(data_br, scratch, fft_flag, scale_flag);
out_sel = hwafft_1024pts(data_br, scratch, fft_flag, scale_flag);
if (out_sel == OUT_SEL_DATA) {
result = data_br;
}else {
result = scratch;
}
}

3、主要代码如上，数据的接收及处理在SAR接收中断里处理：

interrupt void sarISR(void)
{

SAR_readData(SarHandle, &readBuffer[i]);
// printf("SAR ADC read data 0x%x\n",readBuffer);
data_buf[i]=readBuffer[i];
i++;
if(i==1024){
fft();
i=0;
}

4、外部给出正谐波信号，由SAR直接采集。通过观察输入数据，readBuffer[1024]接收正常。时钟配置PLL，sysclock=100MHZ.

您看一下我做得过程，相关的代码都贴出来了