hw_acces.c

usb host在ARM7上的实现

/****************************************************************************/
/*	includes																*/
/****************************************************************************/
#include "HostStack.h"


//****************************************************************************
// 函数名称：read_register_burst_char
// 输入参数：register_address，寄存器地址
//			 data，数据存放指针
//			 length，数据长度
// 输出参数：无
// 功能描述：突发读处理
//****************************************************************************
void read_register_burst_char( unsigned short register_address, unsigned char *data, unsigned short length  )
{
	unsigned short	tmp;
	int				i;
	int				odd;

	disable();
	odd		= length & 0x0001;
	if ( odd )		length	&= ~0x1;		
	outcommand( register_address );
	for ( i = 0; i < length; i += 2 )
	{	tmp		= indata();
		*(data + i + 1)		= tmp >> 8;
		*(data + i + 0)		= tmp & 0x00FF;
	}
	if ( odd )
	{	tmp	= indata();
		*(data + i + 0)		= tmp & 0x00FF;
	}
	enable();
}
	

//****************************************************************************
// 函数名称：write_register_burst_char
// 输入参数：register_address，寄存器地址
//				   data，数据存放指针
//				   length，数据长度
// 输出参数：无
// 功能描述：突发写处理
//****************************************************************************
void write_register_burst_char( unsigned short register_address, unsigned char *data, unsigned short length  )
{
	unsigned short	tmp;
	int				i;
	disable();
	register_address	|= 0x80;
	outcommand( register_address );
	for ( i = 0; i < length; i += 2 )
	{
		tmp		= (*(data + i + 1) << 8) | *(data + i);		/*  swap bytes  */
		outdata( tmp );		
	}
	enable();
}

/*
void read_register_burst_int( unsigned short register_address, unsigned char *data, unsigned short length  )
{
	int		i;

	outcommand( register_address );
	
	for ( i = 0; i < length; i++ )
		*data++		= indata();
}


void write_register_burst_int( unsigned short register_address, unsigned short *data, unsigned short length  )
{
	int		i;

	register_address	|= 0x80;

	outcommand( register_address );
	
	for ( i = 0; i < length; i++ )
		outdata(  *data++ );
}

*/

//****************************************************************************
// 函数名称：read_register32
// 输入参数：register_address
// 输出参数：tmp，读回的寄存器的值
// 功能描述：读ISP1160/ISP1161 32位寄存器
//***************************************************************************
unsigned long read_register32( unsigned short register_address )
{
	unsigned long		tmp;
	disable();
	outcommand( register_address );
	tmp		 = indata();
	tmp		|= ((unsigned long)indata() << 16);
	enable();
	return ( tmp );
}

//****************************************************************************
// 函数名称：write_register32
// 输入参数：register_address
//				   value，写入的值
// 输出参数：无
// 功能描述：写ISP1160/ISP1161 32位寄存器
//***************************************************************************
void write_register32( unsigned short register_address, unsigned long value )
{
	register_address	|= 0x80;
	disable();
	outcommand( register_address );
	outdata( (unsigned short)(value & 0x0000FFFF) );
	outdata( (unsigned short)(value >> 16)        );
	enable();
}

//****************************************************************************
// 函数名称：read_register16
// 输入参数：register_address，需要的寄存器地址
// 输出参数：读回的寄存器数值
// 功能描述：读ISP1160/ISP1161 16位寄存器
//****************************************************************************
unsigned short read_register16( unsigned short register_address )
{
	unsigned short	tmp;
	disable();
	outcommand( register_address );
	tmp	= indata();
	enable();
	return ( tmp );
}

//****************************************************************************
// 函数名称：write_register16
// 输入参数：register_address，需要的寄存器地址
//				   value，需写入的值
// 功能描述：写ISP1160/ISP1161 16位寄存器
//****************************************************************************
void write_register16( unsigned short register_address, unsigned short value )
{
	disable();
	register_address	|= 0x80;
	outcommand( register_address );
	outdata( value );
	enable();
}