#define pllclk (int*)0x7018
#define wdcr (int*)0x7029
#define iomux (int*)0x7092
#define spiccr (int*)0x7040
#define spictl (int*)0x7041
#define spibrr (int*)0x7044
#define spipri (int*)0x704f
#define spidat (int*)0x7049
#define spists (int*)0x7042
#define spirxbuf (int*)0x7047
#include <ioports.h>
ioport unsigned port6;
int endspi();
int busy();
int endspi()
{
int i;
do {i=*spists;}
while((i&0x40)==0);
return 0;
}
int busy()
{
int flag;
*spiccr=0x8f; /*16*/
port6=4; /*low eep cs*/
*spidat=0x0500;
endspi();
port6=0; /*high eep cs*/
flag=*spirxbuf;
flag&=0x0001;
return flag;
}
void eep_write(int start_add,int * data,int num)
{int i,page,j,a;
page=start_add>>5;/*caculate current page*/
while(busy());
*spiccr=0x8f; /*16*/
port6=4; /*low cs*/
*spidat=0x0100; /* wrsr */
endspi(); /*require send is over*/
port6=0; /*high cs*/
while(busy());
*spiccr=0x87; /*8*/
port6=4;
*spidat=0x0600; /*send wren command*/
endspi();
port6=0;
while(busy());
if(num<=16){
*spiccr=0x87; /*8*/
port6=4;
*spidat=0x0200; /*send write command*/
endspi();
*spiccr=0x8f; /*16*/
*spidat=start_add; /*send address*/
endspi();
for (i=0;i<num;i++) {
*spidat=data[i];
endspi();
}
port6=0;
}
else {
*spiccr=0x87; /*8*/
port6=4;
*spidat=0x0200; /*send write command*/
endspi();
*spiccr=0x8f; /*16*/
*spidat=start_add; /*send address*/
endspi();
for (i=0;i<16;i++) {
*spidat=data[i];
endspi();
}
port6=0;
num=num-16;
a=16;
while(num>0){
start_add+=32;
if(num>16) j=16;
else j=num;
*spiccr=0x87; /*8*/
port6=4;
while(busy());
*spidat=0x0200; /*send write command*/
endspi();
*spiccr=0x8f; /*16*/
*spidat=start_add; /*send address*/
endspi();
for (i=0;i<j;i++) {
*spidat=data[i+a];
endspi();
}
port6=0;
num=num-16;
a=a+16;
}
}
}
void eep_read(int start_add,int *data, int num)
{ int i;
while(busy());
*spiccr=0x87; /*8bit send read command*/
port6=4;
*spidat=0x0300;
endspi();
*spiccr=0x8f; /*16 bit send address*/
*spidat=start_add;
endspi();
data[0]=*spirxbuf;
*spiccr=0x8f; /*16*/
for(i=0;i<=num;i++) {
*spidat=0x0000;
endspi();
data[i]=*spirxbuf;
}
port6=0;
}
main()
{
int data[32],i,j,data1[32];
for(i=0;i<32;i++) {
data[i]=i+10;
}
*wdcr=0x006f; /*Disable WD*/
*iomux=0x01ff;
*pllclk=0x007c; /*open spi set clk pll*/
*spiccr=0x0f; /*reset spi*/
*spibrr=20; /*set baud=2M*/
*spipri=0x10; /*free run*/
*spictl=0x0e; /*set mode=2*/
*spiccr=0x8f;
eep_write(0,data,15);
eep_read(0,data1,15);
i=0;
}
