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DMA 的代码
dma.c
/**********************************************************************
CAUTION: DMA operation is being done in cache-on state NOW.
So,some read value may be not same with real memory value
dma.h
#ifndef DMA_ADMIN_H
#define DMA_ADMIN_H
#define MAX_DMA_CHANNEL 4
//#define DMA_IS_USED 1
#define DMA_IS_HWTRIG 2
#define DMA_IS_SWTRIG 1
#define DMA_IS_FREE 0
// request source
#define R
dma.c
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
#include "dma.h"
#define DMA_CHECK_ATTR 1
typedef struct{ //can't use __packed???
dma.h
#ifndef DMA_ADMIN_H
#define DMA_ADMIN_H
#define MAX_DMA_CHANNEL 4
//#define DMA_IS_USED 1
#define DMA_IS_HWTRIG 2
#define DMA_IS_SWTRIG 1
#define DMA_IS_FREE 0
// request source
#define R
dma.c
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
#include "dma.h"
#define DMA_CHECK_ATTR 1
typedef struct{ //can't use __packed???
dma.h
/*****************************************************************************
* dma.h: Header file for NXP LPC23xx/24xx Family Microprocessors
*
* Copyright(C) 2006, NXP Semiconductor
*
dma.c
/*****************************************************************************
* dma.c: DMA module file for NXP LPC23xx/24xx Family Microprocessors
*
* Copyright(C) 2006, NXP Semiconductor
dma.c
/*
* ======== dma.c ========
*/
#include "AudioDMA.h"
extern int dataReadyFlag;
int ping_rx_flag = 1;
int ping_tx_flag = 0;
unsigned int dst, src;
/*
* ======= DMA_rxStart ===