杰理之打开mic，获取mic数据，分析mic频谱【篇】

//使用头文件
#include “spectrum/Spectrum_fft.h”
//数据定义
#define mic_spectrum_fft 1
int get_spectrum;
spectrum_fft_hdl *fft_hdl = NULL;

//开mic,获取mic数据：
extern void mic_spectrum_get_demo(void *p);
int audio_adc_mic_open_demo(u16 sr)
{ printf(“KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKL\n”);
u8 ladc_mic_gain = 5;
ASSERT(ladc_mic == NULL);
ladc_mic = zalloc(sizeof(struct ladc_mic_demo));
if (ladc_mic) {
audio_adc_mic_open(&ladc_mic->mic_ch, AUDIO_ADC_MIC_CH, &adc_hdl);
audio_adc_mic_set_sample_rate(&ladc_mic->mic_ch, sr);
audio_adc_mic_set_gain(&ladc_mic->mic_ch, ladc_mic_gain);
audio_adc_mic_set_buffs(&ladc_mic->mic_ch, ladc_mic->adc_buf, LADC_MIC_IRQ_POINTS * 2, LADC_MIC_BUF_NUM);
audio_adc_mic_start(&ladc_mic->mic_ch);
ladc_mic->adc_output.handler = adc_mic_open_demo_output; //回调函数
ladc_mic->adc_output.priv = &adc_hdl;
audio_adc_add_output_handler(&adc_hdl, &ladc_mic->adc_output);
#if mic_spectrum_fft //频谱部分
spectrum_fft_open_parm parm = {0};
parm.sr = sr;
parm.channel = 1;
parm.attackFactor = 0.9;
parm.releaseFactor = 0.9;
parm.mode = 2;
fft_hdl = audio_spectrum_fft_open(&parm);
get_spectrum = sys_timer_add(fft_hdl, mic_spectrum_get_demo, 500);//频谱值获取测试 */
printf(“spectrum_open_demo\n”);
clock_add(SPECTRUM_CLK);
#endif
return 0;
} else {
return -1;
}
}