簡介：SPI總線驅動程序 包括的普通封裝標準模式,特殊封裝標準模式 。

—————————————————————*/

/*通用93c06-93c86系列使用說明

93c06=93c4693c56=93c6693c76=93c86

dipx 可以自行定義*/

#include "reg51.h"

#include "intrins.h"

/*-----------------------------------------------------

SPI93cXX系列時序函數調用（普通封裝）

調用方式：自行定義

函數說明：私有函數，封裝各接口定義

-----------------------------------------------------*/

#define di_93 dip3

#define sk_93 dip2

#define cs_93 dip1

#define do_93 dip4

#define gnd_93 dip5

#define org_93 dip6

sbit cs_93=P1^0;

sbit sk_93=P1^1;

sbit di_93=P1^2;

sbit do_93=P1^3;

sbit org_93=P0^4;

/*-----------------------------------------------------

SPI93cXX系列時序函數調用（普通封裝）

調用方式：void high46(void) ---高8位函數調用

void low46(void) ---低8位函數調用

函數說明：私有函數，SPI專用93c46普通封裝驅動程序

-----------------------------------------------------*/

void high46(void)

{

di_93=1;

sk_93=1; _nop_();

sk_93=0;_nop_();

}

void low46(void)

{

di_93=0;

sk_93=1;_nop_();

sk_93=0;_nop_();

}

void wd46(unsigned char dd)

{

unsigned char i;

for (i=0;i<8;i++)

{

if (dd>=0x80) high46();

else low46();

dd=dd<<1;

}

}

unsigned char rd46(void)

{

unsigned char i,dd;

do_93=1;

for (i=0;i<8;i++)

{

dd<<=1;

sk_93=1;_nop_();

sk_93=0;_nop_();

if (do_93) dd|=1;

}

return(dd);

}

/*-----------------------------------------------------

SPI93cXX系列時序函數調用（特殊封裝）

調用方式：自行定義

函數說明：私有函數，特殊封裝各接口定義

-----------------------------------------------------*/

#define di_93a dip5

#define sk_93a dip4

#define cs_93a dip3

#define do_93a dip6

#define gnd_93a dip7

#define vcc_93a out_vcc(2)

sbit cs_93a=P1^0;

sbit sk_93a=P1^1;

sbit di_93a=P1^2;

sbit do_93a=P1^3;

/*-----------------------------------------------------

SPI93cXX系列時序函數調用（特殊封裝）

調用方式：void high46a(void) ---高8位函數調用

void low46a(void) ---低8位函數調用

函數說明：私有函數，SPI專用93c46特殊封裝驅動程序

-----------------------------------------------------*/

void high46a(void)

{

di_93a=1;

sk_93a=1;_nop_();

sk_93a=0;_nop_();

}

void low46a(void)

{

di_93a=0;

sk_93a=1;_nop_();

sk_93a=0;

_nop_();

}

void wd46a(unsigned char dd)

{

unsigned char i;

for (i=0;i<8;i++)

{

if (dd>=0x80) high46a();

else low46a();

dd=dd<<1;

}

}

unsigned char rd46a(void)

{

unsigned char i,dd;

do_93a=1;

for (i=0;i<8;i++)

{

dd<<=1;

sk_93a=1;_nop_();

sk_93a=0;_nop_();

if (do_93a) dd|=1;

}

return(dd);

}

/*-----------------------------------------------------

SPI93c46系列函數調用（舉例）

調用方式：bit write93c56_word(unsigned int address,unsigned int dat)

函數說明：私有函數，SPI專用

-----------------------------------------------------*/

void ewen46(void)

{

_nop_();

cs_93=1;

high46();

wd46(0x30);

cs_93=0;

}

unsigned int read93c46_word(unsigned char address)

{

unsigned int dat;

unsigned char dat0,dat1;

gnd_93a=0;

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;_nop_();

address=address>>1;

address=address|0x80;

address=address|0x80;

high46();

wd46(address);

dat1=rd46();

dat0=rd46();

cs_93=0;

dat=dat1*256+dat0;

return(dat);

}

bit write93c46_word(unsigned char address,unsigned int dat)

{

unsigned char e,temp=address;

e=0;

while (e<3)

{

gnd_93a=0;

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

ewen46();

_nop_();

cs_93=1;

_nop_();

high46();

address|=0x80;

address>>=1;//??

address|=0x40;

wd46(address);

wd46(dat/256);

wd46(dat%256);

cs_93=0;

_nop_();

cs_93=1;

time=0;do_93=1;

while (1)

{

if (do_93==1) break;

if (time>20) break;

}

cs_93=0;

if (read93c46_word(temp)==dat)

{

return(0);

}

e++;

}

return(1);

}

/*-----------------------------------------------------

SPI93c57系列函數調用（舉例）

調用方式：bit write93c57_word(unsigned int address,unsigned int dat)

函數說明：私有函數，SPI專用

-----------------------------------------------------*/

void ewen57(void)

{

_nop_();

cs_93=1;

dip7=0;

high46();

low46();

wd46(0x60);

cs_93=0;

}

unsigned int read93c57_word(unsigned int address)

{

unsigned int dat;

unsigned char dat0,dat1;

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

address=address>>1;

high46();

high46();

wd46(address);

dat1=rd46();

dat0=rd46();

cs_93=0;

dat=dat1*256+dat0;

return(dat);

}

bit write93c57_word(unsigned int address,unsigned int dat)

{

unsigned char e;

unsigned int temp=address;

e=0;

while (e<3)

{

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

ewen57();

cs_93=1;

_nop_();

high46();

low46();

address>>=1;

address|=0x80;

wd46(address);

wd46(dat/256);

wd46(dat%256);

cs_93=0;

_nop_();

cs_93=1;

time=0;

do_93=1;

while (1)

{

if (do_93==1) break;

if (time>20) break;

}

cs_93=0;

if (read93c57_word(temp)==dat)

{

return(0);

}

e++;

}

return(1);

}

/*-----------------------------------------------------

SPI93c56系列函數調用（舉例）

調用方式：bit write93c56_word(unsigned int address,unsigned int dat)

函數說明：私有函數，SPI專用

-----------------------------------------------------*/

void ewen56(void)

{

_nop_();

cs_93=1;

high46();

low46();

low46();

wd46(0xc0);

cs_93=0;

}

unsigned int read93c56_word(unsigned char address)

{

unsigned int dat;

unsigned char dat0,dat1;

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

address=address>>1;

high46();

high46();

low46();

wd46(address);

dat1=rd46();

dat0=rd46();

cs_93=0;

dat=dat1*256+dat0;

return(dat);

}

bit write93c56_word(unsigned char address,unsigned int dat)

{

unsigned char e;

unsigned int temp=address;

e=0;

while (e<3)

{

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

ewen56();

_nop_();

cs_93=1;

_nop_();

high46();

low46();

high46();

address>>=1;

wd46(address);

wd46(dat/256);

wd46(dat%256);

cs_93=0;

_nop_();

cs_93=1;

TH0=0;

time=0;

do_93=1;

while (1)

{

if (do_93==1) break;

if (time) break;

}

cs_93=0;

if (read93c56_word(temp)==dat)

{

return(0);

}

e++;

}

return(1);

}

/*-----------------------------------------------------

SPI93c76與SPI93c86系列函數調用（舉例）

調用方式：bit write93c76_word(unsigned int address,unsigned int dat)

函數說明：私有函數，SPI專用

-----------------------------------------------------*/

void ewen76(void)

{

_nop_();

cs_93=1;

dip7=1;

high46();

low46();

low46();

high46();

high46();

wd46(0xff);

cs_93=0;

}

unsigned int read93c76_word(unsigned int address)

{

unsigned char dat0,dat1;

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

address>>=1;

high46();

high46();

low46();

if((address&0x200)==0x200) high46();

else low46();

if ((address&0x100)==0x100) high46();

else low46();

wd46(address);

dat1=rd46();

dat0=rd46();

cs_93=0;

return(dat1*256|dat0);

}

bit write93c76_word(unsigned int address,unsigned int dat)

{

unsigned char e;

unsigned int temp=address;

e=0;

address>>=1;

while (e<3)

{

gnd_93=0;

cs_93=sk_93=0;

org_93=1;

cs_93=1;

ewen76();

_nop_();

cs_93=1;

high46();

low46();

high46();

if((address&0x200)==0x200) high46();

else low46();

if ((address&0x100)==0x100) high46();

else low46();

wd46(address);

wd46(dat/256);

wd46(dat%256);

cs_93=0;_nop_();cs_93=1;

time=0;do_93=1;

while (1)

{

if (do_93==1) break;

if (time>10) break;

}

cs_93=0;

e++;

}

return(1);

}

/*-----------------------------------------------------

主函數調用（舉例）

調用方式：main()

函數說明：私有函數，SPI專用

-----------------------------------------------------*/

main()

{ bit b;

unsigned int i;

unsigned int j[32],k;

for(i=0;i<32;i++)

j[i]=read93c56_word(i);

for(i=0;i<32;i++)

write93c56_word(i,0x0909);

i=0;

b=write93c56_word(i,0x0909);

j[i]=read93c56_word(i);

i=1;

b=write93c56_word(i,0x1111);

j[i]=read93c56_word(i);

i=2;

b=write93c56_word(i,0x2222);

j[i]=read93c56_word(i);

}