#include <def21489.h>
#include <cdef21489.h>
#include <stdio.h>
#include <signal.h>
#include <config.h>
#include "drv/fft_drv.h"
#include "fft.h"

//static volatile int fft_channel;
volatile fft_state  fft_status = fft_idle ;  //fftÓ²¼þ×ÊÔ´Õ¼ÓñêÖ¾,Á½ÖÖfft_idle, fft_busy

//real, imag,real,imag...real,imag
#pragma align 1024
static  dm float fft_input[2*N];	
static  pm float fft_output[2*N];

//static fn_fft_completely pfft_notify =0 ;
//static void* pfft_context=0;

static int fft_count=0;

void fft_isr(int sig)
{	
	if(*pFFTDMASTAT & ODMACHIRPT) {	
		fft_count++;	
		fft_status = fft_completed; 
	}
}

void fft_monitor(void)
{
	static int old_fft_count =0;
	static int  fft_stop_count =0;
	
	if(old_fft_count == fft_count){
		fft_stop_count ++ ;	
	}
	else{
		old_fft_count = fft_count;
		fft_stop_count = 0;
	}
	
	if(fft_stop_count > (N/64)){
		//reset fft
		fft_status = fft_idle;
		fft_stop_count =0;	
	}
}


 float* fft_channel_inptr()
{
	return fft_input;
}

void fft_reset()
{
	int timeout =0 ;

	while(fft_status == fft_progress){
		timeout++;
		if(timeout>0xffff)	{
			break;
		}
	}
	
	fft_status = fft_idle;
}

 float* fft_channel_outptr()
{
	//µ÷ÓôνӿÚ×Ô¶¯Çå³ý״̬
	fft_status = fft_idle;
	return fft_output;
}

void fft_start()
{
	fft_startup((int)fft_input,(int)fft_output);	
	fft_status = fft_progress;
}


void fft_init()
{
	int i;
	fft_coeff_calculation();
	fft_config(true,15); //15±íʾӳÉäÖжϵ½SIG_P15
	
	interrupts(SIG_P15,fft_isr);
	fft_status = fft_idle;
}