level0.c

USB Pad test source code with SL811 usb host ic

/* FileName: Level0.c */
#include	"io51.h"
#include        "usb_def.h"

/* the function defined in level0.c */
void	write_host_addr(unsigned char addr);
void    write_host_data(unsigned char datum);
unsigned char	read_host_data(void);
void	i_write_host_addr(unsigned char addr);
void    i_write_host_data(unsigned char datum);
unsigned char	i_read_host_data(void);
void	enable_tmr(void);
void	disable_tmr(void);
void 	delay ( unsigned int cnt);
void 	i_delay ( unsigned int cnt);

/* the external function defined in usb.c */
extern interrupt void T0_int(void);
extern interrupt void EX0_int(void);
extern void Dis_ver(void);

/**************************************************************************
 This function write SL11H memory address to SL11H
**************************************************************************/
void	write_host_addr(unsigned char addr)
{
	P3.4=0;		/* CS=0 */
	P0= addr;
	P1 &= 0xF9;	/* WR=0,A0=0,RD=1 */	
	P1 &= 0xF9; 
	P1 |= 0x06;	/* WR=1,A0=1,RD=1 */
}
/**************************************************************************
 This function write data byte to SL11H memory
**************************************************************************/
void    write_host_data(unsigned char datum)
{
	P3.4=0;		/* CS=0 */
        P0 = datum;
	P1 &= 0xFB;	/* WR=0,A0=1,RD=1 */		
	P1 &= 0xFB; 
	P1 |= 0x04;	/* WR=1,A0=1,RD=1 */
}
/**************************************************************************
 This function read a byte from SL11H. It returns the byte read
**************************************************************************/
unsigned char	read_host_data(void)
{
	unsigned char read_data;
	P0=0xFF;
	P3.4=0;		/* CS=0 */
	P1 &= 0xF7;  /* WR=1,A0=1,RD=0 */
	P1 &= 0xF7; 
	read_data = P0;
	P1 |= 0x08;   /* WR=1,A0=1,RD=1 */
	return read_data;
}
/**************************************************************************
 This function write SL11H memory address to SL11H
**************************************************************************/
void	i_write_host_addr(unsigned char addr)
{
	P3.4=0;		/* CS=0 */
	P0 = addr;
	P1.3=1;		/* RD=1 */
	P1 &= 0xF9;	/* WR=0,A0=0,RD=1 */	
	P1 &= 0xF9; 
	P1 |= 0x06;	 /* WR=1,A0=1,RD=1 */
}
/**************************************************************************
 This function write data byte to SL11H memory
**************************************************************************/
void    i_write_host_data(unsigned char datum)
{
	P3.4=0;		/* CS=0 */
        P0 = datum;
	P1.1=1;	P1.3=1;	/* A0=1,RD=1 */
	P1 &= 0xFB;	/* WR=0,A0=1,RD=1 */		
	/* P1 &= 0xFB; */
	P1 |= 0x04;	/* WR=1,A0=1,RD=1 */
}
/**************************************************************************
 This function read a byte from SL11H. It returns the byte read
**************************************************************************/
unsigned char	i_read_host_data(void)
{
	unsigned char read_data;
	P0=0xFF;
	P3.4=0;		/* CS=0 */
	P1.1=1; P1.2=1; /* A0=1,WR=1 */
	P1 &= 0xF7;  /* WR=1,A0=1,RD=0 */
	/* P1 &= 0xF7;  */
	read_data = P0;
	P1 |= 0x08;   /* WR=1,A0=1,RD=1 */
	return read_data;
}
/*************************************************************************
 This function enables the 1 ms timer for sending EOF
 The user should modify it according to the hardware
*************************************************************************/
void	enable_tmr(void)
{	
        TR0=1;  ET0 = 1;
}

/*************************************************************************
 This function disables the 1 ms timer for sending EOF
 The user should modify it according to the hardware
*************************************************************************/
void	disable_tmr(void)
{
        TR0=0;  ET0 = 0;
 }
/**************************************************************
  File Name : void delay ( unsigned char count)
 **************************************************************/
void delay ( unsigned int cnt) 
    {
       unsigned int j;
       for(j=0;j<cnt;j++);
    }
/**************************************************************
  File Name : void delay ( unsigned char count)
 **************************************************************/
void i_delay ( unsigned int cnt) 
    {
       unsigned int j;
       for(j=0;j<cnt;j++);
    }