arm9_hpi.c

DSP DM642的HPI接口应用

/***************************************************/
/****************arm9与雷达处理部分通信模块BOB=0*********/
/***************************************************/
//*********接口部分数据定义************//

//待定
//***************************************//
#include "ARM9_HPI.h"

//针对相应CPU的字节读写函数，此处用宏定义实现
//Uint Addr_Read(Uint addr);
//void Addr_Write(Uint addr,Uint d);


//******************************底层接口函数定义***************************//
//写控制HPIC
void HPIC_Write(INT32U w)
{   
	INT32U t1,t2;
	t1 = (0xffff0000 & w) >>16 ;
	t2 = (0x0000ffff & w);
	Addr_Write(HPI_ADDR_HPIC_LW,t1);
	Addr_Write(HPI_ADDR_HPIC_HW,t2);   /*  hpic, write */
}
//读控制HPIC
INT32U HPIC_Read(void)
{
	INT32U t1=0,t2=0;                                             																																																				
	t1=Addr_Read(HPI_ADDR_HPIC_LR);                                     																																																				
	t2=Addr_Read(HPI_ADDR_HPIC_HR);      /*  readback of HPIC  */       																																																				
	return( (t1<<16) | t2);                                      																																																				
}                         
//读数据,地址不变模式
INT32U HPID_Read(void)
{   
	INT32U t1=0,t2=0;
	t1=Addr_Read(HPI_ADDR_HPID_LR);
	t2=Addr_Read(HPI_ADDR_HPID_HR);      /*  readback of HPID, HPIA auto ++  */
	return( (t1<<16) | t2);
}
//写数据,地址不变模式
void HPID_Write(INT32U w)    /* write HPID, HPIA auto ++  */
{  
	INT32U t1,t2;
	t1 = (0xffff0000 & w) >>16 ;
	t2 = (0x0000ffff & w);
	Addr_Write(HPI_ADDR_HPID_LW,t1);
	Addr_Write(HPI_ADDR_HPID_HW,t2);

}
//读数据,地址自动增加模式
INT32U HPID_Read_Auto(void)
{   
	INT32U t1=0,t2=0;
	t1=Addr_Read(HPI_ADDR_HPID_ALR);
	t2=Addr_Read(HPI_ADDR_HPID_AHR);      /*  readback of HPID, HPIA auto ++  */
	return( (t1<<16) | t2);
}
//写数据,地址自动增加模式
void HPID_Write_Auto(INT32U w)    /* write HPID, HPIA auto ++  */
{  
	INT32U t1,t2;
	t1 = (0xffff0000 & w) >>16 ;
	t2 = (0x0000ffff & w);
	Addr_Write(HPI_ADDR_HPID_ALW,t1);
	Addr_Write(HPI_ADDR_HPID_AHW,t2);

}
//读地址
INT32U HPIA_Read(void)
{   
	INT32U t1=0,t2=0;
	t1=Addr_Read(HPI_ADDR_HPIA_LR);
	t2=Addr_Read(HPI_ADDR_HPIA_HR);      /*  readback of HPIA  */
	return( (t1<<16) | t2);

}
//写入地址
void HPIA_Write(INT32U w)
{  
	INT32U t1,t2;
	t1 = (0xffff0000 & w) >>16 ;
	t2 = (0x0000ffff & w);
	Addr_Write(HPI_ADDR_HPIA_LW,t1);
	Addr_Write(HPI_ADDR_HPIA_HW,t2);
}
//产生DSP端的中断
void Set_DSPint()
{
	INT32U k;
	k=HPIC_Read()|(1<<DSPINT)|(1<<DSPINT_H);
	HPIC_Write(k);
}
//收到发送的中断后清除标志
void Clear_HPIint()
{
	INT32U k;
	k=HPIC_Read()|(1<<HINT)|(1<<HINT_H);
	HPIC_Write(k);
}
//******************************上层接口函数定义******************************//
//初始化HPIC,设置之后不再改变，b=0/BOB=0;b=1/BOB=1;
void Init_HPIC(INT32U bob)
{
	INT32U k,j;
	k=0x00040004|(bob<<BOB_H)|bob; //清除HINT，并且设置BOB位。
	HPIC_Write(k);	
/*	j=HPIC_Read();	
	k=0x00040004|(1<<BOB_H)|1; //清除HINT，并且设置BOB位。	
	*(volatile unsigned short *)0x30000000 = 0x05;
	*(volatile unsigned short *)0x30000002 = 0x05;	
	//HPIC_Write(k);
	j=HPIC_Read();		
	HPIA_Write(0x00002000);
	j=HPIA_Read();
	HPIA_Write(0x12345678);
	j=HPIA_Read();
	
	k=0x00040004; //清除HINT，并且设置BOB位。
	HPIC_Write(k);	
	j=HPIC_Read();
*/	
}

//向DSP写入数据
void Write_DSP_Data(INT32U addr,INT32U *p ,INT32U len)
{
	INT32U i;
	HPIA_Write(addr); 
     
	for(i=0;i<len;i++)		 /*  when write data, should first hpia++  */
	{
		HPID_Write_Auto(*p++);    
	   	asm("nop"); 
		asm("nop");    
		asm("nop");  
		asm("nop");    
		asm("nop");   
		asm("nop"); 
		asm("nop");    
		asm("nop");  
		asm("nop");    
		asm("nop");   
	}
	Set_DSPint();		//设置DSP端中断
}
//向DSP写入数据,地址数据方式
void Write_DSP_Data_AD(INT32U addr,INT32U *p ,INT32U len)
{
	INT32U i;
	for(i=0;i<len;i++)		 /*  when write data, should first hpia++  */
	{
		HPIA_Write(addr); 
		HPID_Write(*p++);  
		addr=addr+4;  
 
	} 
	Set_DSPint();		//设置DSP端中断
}
//读取HPI数据
void  Read_DSP_Data(INT32U addr,INT32U *p ,INT32U len)
{
	INT32U i;
	Clear_HPIint();		//清除中断标志
	HPIA_Write(addr);   
	for(i=0;i<len;i++)		 /*  when write data, should first hpia++  */
	   *p++=HPID_Read_Auto();     
}
//读取HPI数据,地址数据方式
void  Read_DSP_Data_AD(INT32U addr,INT32U *p ,INT32U len)
{
	INT32U i,j;
	Clear_HPIint();		//清除中断标志
	for(i=0;i<len;i++)		 /*  when write data, should first hpia++  */
	{	HPIA_Write(addr);
			 
	    /* */		asm("nop");    
		asm("nop"); 
		asm("nop");    
		asm("nop");  
		asm("nop");    
		asm("nop");  
		 
	   *p++=HPID_Read();   
	   addr=addr+4;   
	}
}