ofdm_old.h

来自「完整的OFDM系统,含Matlab仿真代码和DSP源代码下载.平台Tms320C」· C头文件 代码 · 共 72 行

//ofdm.h
//Group Red 2002
//

#ifndef OFDM
#define OFDM

#define _TI_ENHANCED_MATH_H 1
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#include <dma.h>	/* TMS320C6x Peripheral Support Library DMA Support */
#include <intr.h>	/* TMS320C6x Peripheral Support Library Interrupt Support */
#include <mcbsp.h>	/* TMS320C6x Peripheral Support Library McBSP Support */
#include <regs.h>	/* TMS320C6x Peripheral Support Library CPU Register Support */
#include <board.h>	/* TMS320C6x Peripheral Support Library Board Support */
#include <codec.h>	/* Codec Library API Functions */

//Get data from host
#define FillHostBuffer1_MM	1
#define FillHostBuffer2_MM	2
#define HostBufferSize 10 //numbers of 32 bit segments in each HostBuffer
#define HostBufferBitLength (HostBufferSize*32) //numbers of bits in HostBuffer
extern volatile unsigned int HostBuffer1[HostBufferSize]; //buffer 1
extern volatile unsigned int HostBuffer2[HostBufferSize]; //buffer 2
extern volatile unsigned int *CurrentHostBuffer; //current buffer used

//codec
#define SAMPLING_FREQ	8000
#define MIC_SELECT		1	/* Input source: Mic-1, Line-0 */

//fft
#define FFT_SIZE		256
#define PREFIX_LENGTH	32

#define BUFFER_SIZE		FFT_SIZE
#define BLOCK_SIZE		BUFFER_SIZE * 2	/* Total number of both left and right short elements in a buffer */
#define NR_OF_CHANNELS	(FFT_SIZE/2 -1)		//Number of channels
#define FRAME_LENGTH	(PREFIX_LENGTH + BLOCK_SIZE)

#define N				FFT_SIZE	 		/* N point DFT */
#define n				16                  /* Size of index, calculate using formula in bitrev.asm */
#define PI				3.14159265358979323846264338327950288419716939937510
#define DELTA			2 * PI / N
#define ONE_OVER_SQRT_N	0.0625				/* 1/sqrt(N) */

//modulation
#define QAM_AMPLITUDE	1000	// bit amplitude

//extern short InBuffer1[BLOCK_SIZE];
//extern short InBuffer2[BLOCK_SIZE];
//extern short OutBuffer1[10*BLOCK_SIZE];
//extern short OutBuffer2[BLOCK_SIZE];

//extern short *InBufferPtr;
//extern short *OutBufferPtr;

extern volatile float signalf[BLOCK_SIZE];

extern float dft[N];	/* Number of coefficients needed for the DFT routine is N */
extern float idft[N];	/* Number of coefficients needed for the IDFT routine is N */

extern const short index[n];
extern int exponent2;

#define TRUE	1
#define FALSE	0

#endif