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DMA 的代码
dma.c
/*****************************************
NAME: dma.c
DESC: DMA memory2memory test
HISTORY:
2001.03.31:purnnamu: draft ver 0.0
*****************************************/
#include
dma.err
"dma.c", line 125: Warning: C2892E: signed constant overflow: '
dma.h
#ifndef __DMA_H__
#define __DMA_H__
void Test_DMA(void);
#endif /*__DMA_H__*/
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_H__
#define __DMA_H__
void Test_Zdma0(void);
void Test_Zdma1(void);
//void Test_Zdma0Xdreq(void);
#endif /*__DMA_H__*/
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.sct
; *************************************************************
; *** Scatter-Loading Description File generated by uVision ***
; *************************************************************
LR_
dma范例.txt
/*
* 声明：本范例源于书籍‘NiosII软件架构解析’
* 作者：蔡伟纲
* 博客地址： http://NiosII.cublog.cn
*
* 一、功能: <mark>DMA</mark>(Memory to Memory)驱动演示代码.
* 二、运行前提: 本范例需要硬件开发板的支持,
* 要求NiosII系统包含名为”<mark>dma</mark>”的<mark>DMA</mark>模块,
* 且<mark>DMA</mark>的长度寄存 ...
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