a7279.h

基于c51单片机的7279显示程序

#ifndef __A7279_H__
#define __A7279_H__


sbit cs=P1^0;    // cs at P1.0
sbit clk=P1^1;   // clk at P1.1
sbit dat=P1^2;   // dat at P1.2
sbit key=P3^3;   // key at P3.3

void long_delay(void);    // 
void short_delay(void); // h..1
void delay10ms(unsigned char); // .110MS
void write7279(unsigned char, unsigned char);// ù)fHD7279
unsigned char read7279(unsigned char);// ;HD7279N9
void send_byte(unsigned char); // .Cu￡HI
unsigned char receive_byte(void); // #eu￡HI

void write7279(unsigned char cmd, unsigned char dta)
{
send_byte (cmd);
send_byte (dta);
}
unsigned char read7279(unsigned char command)
{
send_byte(command);
return(receive_byte());
}
void send_byte( unsigned char out_byte)
{
unsigned char i;
cs=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=out_byte*2;
}
dat=0;
}
unsigned char receive_byte(void)
{
unsigned char i, in_byte;
dat=1; // jV()WX
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<0x30;i++);
}
void short_delay(void)
{
unsigned char i;
for (i=0;i<8;i++);
}
// ********************* .1 n*10ms **********************
void delay10ms(unsigned char time)
{
unsigned char i;
unsigned int j;
for (i=0;i<time;i++)
{
for(j=0;j<0x390;j++)
{
if (!key)
{
//key_int()
;
}
}
}
}


#endif