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