102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
|
/*
|
|||
|
|
****************************************************************************
|
|||
|
|
* Audio FFT Demo
|
|||
|
|
*
|
|||
|
|
*Description : Audio FFT使用范例
|
|||
|
|
*Notes :
|
|||
|
|
*(1)本demo为开发测试范例，请不要修改该demo， 如有需求，请自行复制再修改
|
|||
|
|
*(2)FFT输入数据位宽
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
* FFT模式 FFT点数 最大输入位宽
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
* 复数 64 [21:0]
|
|||
|
|
* 128 [20:0]
|
|||
|
|
* 256 [19:0]
|
|||
|
|
* 512 [18:0]
|
|||
|
|
* 1024 [17:0]
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
* 实数 64 [20:0]
|
|||
|
|
* 128 [18:0]
|
|||
|
|
* 256 [17:0]
|
|||
|
|
* 512 [18:0]
|
|||
|
|
* 1024 [16:0]
|
|||
|
|
*----------------------------------------------------------------------
|
|||
|
|
*(3)IFFT输入位宽：[29:0]
|
|||
|
|
****************************************************************************
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#include "audio_demo.h"
|
|||
|
|
#include "hw_fft.h"
|
|||
|
|
|
|||
|
|
// For 128 point Real_FFT test
|
|||
|
|
void hw_fft_demo_real()
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
int tmpbuf[130]; // 130 = (128/2+1)*2
|
|||
|
|
unsigned int fft_config;
|
|||
|
|
|
|||
|
|
printf("********* test start **************\n");
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 128; i++) {
|
|||
|
|
tmpbuf[i] = i + 1;
|
|||
|
|
printf("tmpbuf[%d]: %d \n", i, tmpbuf[i]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Do 128 point FFT
|
|||
|
|
fft_config = hw_fft_config(128, 7, 1, 0, 1);
|
|||
|
|
|
|||
|
|
hw_fft_run(fft_config, tmpbuf, tmpbuf);
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 130; i++) {
|
|||
|
|
printf("tmpbuf_[%d]: %d \n", i, tmpbuf[i]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Do 128 point IFFT
|
|||
|
|
fft_config = hw_fft_config(128, 7, 1, 1, 1);
|
|||
|
|
|
|||
|
|
hw_fft_run(fft_config, tmpbuf, tmpbuf);
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 128; i++) {
|
|||
|
|
printf("tmpbuf_[%d]: %d \n", i, tmpbuf[i]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// For 128 point Complex_FFT test
|
|||
|
|
void hw_fft_demo_complex()
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
int tmpbuf[280]; // 280 = (128/2+1)*2*2
|
|||
|
|
unsigned int fft_config;
|
|||
|
|
|
|||
|
|
printf("********* test start **************\n");
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 128; i++) {
|
|||
|
|
tmpbuf[2 * i] = i + 1;
|
|||
|
|
tmpbuf[2 * i + 1] = i + 1;
|
|||
|
|
printf("tmpbuf[%d]: %d \n", 2 * i, tmpbuf[2 * i]);
|
|||
|
|
printf("tmpbuf[%d]: %d \n", 2 * i + 1, tmpbuf[2 * i + 1]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Do 128 point FFT
|
|||
|
|
|
|||
|
|
fft_config = hw_fft_config(128, 7, 1, 0, 0);
|
|||
|
|
|
|||
|
|
hw_fft_run(fft_config, tmpbuf, tmpbuf);
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 128; i++) {
|
|||
|
|
printf("tmpbuf[%d]: %d \n", 2 * i, tmpbuf[2 * i]);
|
|||
|
|
printf("tmpbuf[%d]: %d \n", 2 * i + 1, tmpbuf[2 * i + 1]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Do 128 point IFFT
|
|||
|
|
fft_config = hw_fft_config(128, 7, 1, 1, 0);
|
|||
|
|
|
|||
|
|
hw_fft_run(fft_config, tmpbuf, tmpbuf);
|
|||
|
|
|
|||
|
|
for (int i = 0; i < 128; i++) {
|
|||
|
|
printf("tmpbuf[%d]: %d \n", 2 * i, tmpbuf[2 * i]);
|
|||
|
|
printf("tmpbuf[%d]: %d \n", 2 * i + 1, tmpbuf[2 * i + 1]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|