www.pudn.com > armexamples.rar > main.c
/* 包含文件 */
#include "def.h"
#include "2410lib.h"
#include "option.h"
#include "2410addr.h"
#include "interrupt.h"
/* 函数声明 */
static void Dma0Done() __attribute__ ((interrupt("IRQ")));
static void Dma1Done() __attribute__ ((interrupt("IRQ")));
static void Dma2Done() __attribute__ ((interrupt("IRQ")));
static void Dma3Done() __attribute__ ((interrupt("IRQ")));
void DMA_M2M(int ch,int srcAddr,int dstAddr,int tc,int dsz,int burst);
void Test_DMA(void);
/* DMA特殊功能寄存器 */
typedef struct tagDMA
{
volatile U32 DISRC; //0x0 DMA初始源寄存器
volatile U32 DISRCC; //0x4 DMA初始源控制寄存器
volatile U32 DIDST; //0x8 DMA初始目的寄存器
volatile U32 DIDSTC; //0xc DMA初始目的控制寄存器
volatile U32 DCON; //0x10 DMA控制寄存器
volatile U32 DSTAT; //0x14 DMA状态寄存器
volatile U32 DCSRC; //0x18 当前源寄存器
volatile U32 DCDST; //0x1c 当前目的寄存器
volatile U32 DMASKTRIG; //0x20 DMA掩码触发寄存器
}DMA;
static volatile int dmaDone;
/********************************************************************
// Function name : Main
// Description : JXARM9-2410 DMA操作实验主程序
// 实现功能：
// 实现DMA方式内存到内存的拷贝动作，修改DMA设置
// 并比较其工作效率，实验包括：
// DMA0-DMA3
// Return type : void
// Argument : void
*********************************************************************/
void Main(void)
{
/* 配置系统时钟 */
ChangeClockDivider(1,1); // 1:2:4
ChangeMPllValue(0xa1,0x3,0x1); // FCLK=202.8MHz
/* 中断初始化 */
Isr_Init();
/* 初始化端口 */
Port_Init();
/* 初始化串口 */
Uart_Init(0,115200);
Uart_Select(0);
/* 打印提示信息 */
PRINTF("\n---DMA操作实验主程序---\n");
PRINTF("\n请将UART0与PC串口进行连接，然后启动超级终端程序(115200, 8, N, 1)\n");
PRINTF("\n开始DMA测试\n");
/* 开始DMA测试 */
Test_DMA();
PRINTF("\nDMA测试结束\n");
while(1)
{
}
}
void Test_DMA(void)
{
//DMA Ch 0
DMA_M2M(0,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x80000,0,0); //byte,single
DMA_M2M(0,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x40000,1,0); //halfword,single
DMA_M2M(0,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,2,0); //word,single
DMA_M2M(0,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,0,1); //byte,burst
DMA_M2M(0,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x10000,1,1); //halfword,burst
DMA_M2M(0,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000, 0x8000,2,1); //word,burst
//DMA Ch 1
DMA_M2M(1,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x80000,0,0); //byte,single
DMA_M2M(1,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x40000,1,0); //halfword,single
DMA_M2M(1,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,2,0); //word,single
DMA_M2M(1,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,0,1); //byte,burst
DMA_M2M(1,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x10000,1,1); //halfword,burst
DMA_M2M(1,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000, 0x8000,2,1); //word,burst
//DMA Ch 2
DMA_M2M(2,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x80000,0,0); //byte,single
DMA_M2M(2,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x40000,1,0); //halfword,single
DMA_M2M(2,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,2,0); //word,single
DMA_M2M(2,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,0,1); //byte,burst
DMA_M2M(2,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x10000,1,1); //halfword,burst
DMA_M2M(2,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000, 0x8000,2,1); //word,burst
//DMA Ch 3
DMA_M2M(3,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x80000,0,0); //byte,single
DMA_M2M(3,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x40000,1,0); //halfword,single
DMA_M2M(3,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,2,0); //word,single
DMA_M2M(3,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x20000,0,1); //byte,burst
DMA_M2M(3,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000,0x10000,1,1); //halfword,burst
DMA_M2M(3,_NONCACHE_STARTADDRESS,_NONCACHE_STARTADDRESS+0x800000, 0x8000,2,1); //word,burst
}
/********************************************************************
// Function name : DMA_M2M
// Description : DMA方式内存拷贝
// Return type : void
// Argument : int ch:DMA通道 0-DMA0, 1-DMA1, 2-DMA2, 3-DMA3
// Argument : int srcAddr:源地址
// Argument : int dstAddr:目的地址
// Argument : int tc:初始传输计数值
// Argument : int dsz:传输数据宽度 0-1字节 1-2字节 2-3字节
// Argument : int burst:自动传输的传输宽度 0-单元传输（一个字节） 1-突发模式传输（四个字节）
*********************************************************************/
void DMA_M2M(int ch,int srcAddr,int dstAddr,int tc,int dsz,int burst)
{
int i,time;
volatile U32 memSum0=0,memSum1=0;
DMA *pDMA;
int length;
length=tc*(burst ? 4:1)*((dsz==0)+(dsz==1)*2+(dsz==2)*4);
PRINTF("[DMA%d MEM2MEM Test]\n",ch);
switch(ch)
{
case 0:
Irq_Request(IRQ_DMA0, Dma0Done);
Irq_Enable(IRQ_DMA0);
pDMA=(void *)0x4b000000;
break;
case 1:
Irq_Request(IRQ_DMA1, Dma1Done);
Irq_Enable(IRQ_DMA1);
pDMA=(void *)0x4b000040;
break;
case 2:
Irq_Request(IRQ_DMA2, Dma2Done);
Irq_Enable(IRQ_DMA2);
pDMA=(void *)0x4b000080;
break;
case 3:
Irq_Request(IRQ_DMA3, Dma3Done);
Irq_Enable(IRQ_DMA3);
pDMA=(void *)0x4b0000c0;
break;
}
PRINTF("DMA%d %8xh->%8xh,size=%xh(tc=%xh),dsz=%d,burst=%d\n",ch,
srcAddr,dstAddr,length,tc,dsz,burst);
PRINTF("Initialize the src.\n");
for(i=srcAddr;i<(srcAddr+length);i+=4)
{
*((U32 *)i)=i^0x55aa5aa5;
memSum0+=i^0x55aa5aa5;
}
PRINTF("DMA%d start\n",ch);
dmaDone=0;
pDMA->DISRC=srcAddr;
pDMA->DISRCC=(0<<1)|(0<<0); // inc,AHB
pDMA->DIDST=dstAddr;
pDMA->DIDSTC=(0<<1)|(0<<0); // inc,AHB
pDMA->DCON=tc|(1<<31)|(1<<30)|(1<<29)|(burst<<28)|(1<<27)|\
(0<<23)|(1<<22)|(dsz<<20)|(tc);
//HS,AHB,TC interrupt,whole, SW request mode,relaod off
pDMA->DMASKTRIG=(1<<1)|1; //DMA on, SW_TRIG
Timer_Start(3);//128us resolution
while(dmaDone==0);
time=Timer_Stop();
PRINTF("DMA transfer done. time=%f, %fMB/S\n",(float)time/ONESEC3,
length/((float)time/ONESEC3)/1000000.);
Irq_Disable(IRQ_DMA0);
Irq_Disable(IRQ_DMA1);
Irq_Disable(IRQ_DMA2);
Irq_Disable(IRQ_DMA3);
for(i=dstAddr;i