?? hd7279a.c
字號:
#include "P89C60X2.h"
#include "hicj6.h"
#include "hd7279.h"
void write7279(unsigned char cmd, unsigned char dta,unsigned char chip)
{ EA=0;
send_byte (cmd,chip);
send_byte (dta,chip);
cs1=cs2=1;
EA=1;
}
/*
unsigned char read7279(unsigned char command)
{
send_byte(command,1);
return(receive_byte());
cs1=1;
cs2=1;
}
*/
void send_byte(unsigned char out_byte, unsigned char chip)
{
unsigned char i;
// EA=0;
if (chip==0)
{
cs1=0;
cs2=1;
}
else
{
cs1=1;
cs2=0;
}
//long_delay();
for (i=0;i<8;i++)
{
if (out_byte&0x80)
{
dat=1;
}
else
{
dat=0;
}
clk=1;
short_delay();
clk=0;
short_delay();
out_byte<<=1;
}
dat=0;
// EA=1;
}
/*
void send_byte( unsigned char out_byte, unsigned char chip)
{
unsigned char i;
if (chip==0)
{
cs1=0;
cs2=1;
}
else
{
cs1=1;
cs2=0;
}
long_delay();
for (i=0;i<8;i++)
{
if (out_byte&0x80)
{
dat=1;
}
else
{
dat=0;
}
clk=1;
short_delay();
clk=0;
short_delay();
out_byte<<=2;
}
dat=0;
}
*/
/*
unsigned char receive_byte(void)
{
unsigned char i, in_byte;
cs1=1;
cs2=0;
dat=1; // set to input mode
long_delay();
for (i=0;i<8;i++)
{
clk=1;
short_delay();
in_byte=in_byte*2;
if (dat)
{
in_byte=in_byte|0x01;
}
clk=0;
short_delay();
}
dat=0;
return (in_byte);
}
*/
void long_delay(void)
{
unsigned char i;
for (i=0;i<0x25;i++);
}
void short_delay(void)
{
unsigned char i;
for (i=0;i<8;i++);
}
void delay10ms(unsigned char time)
{
unsigned char i;
unsigned int j;
for (i=0;i<time;i++)
{
for(j=0;j<0x390;j++)
{
;
}
}
}
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