基于PCF8591的I_2C总线A_D_D_A转换的资料

for(x=z;x>

if(jylc>

if(jylc>

if(count>

for(x=z;x>

te_byte(address);

respons();

start();

write_byte(0x91);

respons();

date=read_byte();

stop();

return date;

}

void display(uchar ge,uchar shi,uchar bai)

{

P0=0xff;

LS138A=1; //第一位

LS138B=1;

LS138C=1;

P0=table[ge];

delay1ms(1);

P0=0xff;

LS138A=0; //第二位

LS138B=1;

LS138C=1;

P0=table[shi];

delay1ms(1);

P0=0xff;

LS138A=1; //第三位

LS138B=0;

LS138C=1;

P0=table[bai];

delay1ms(1);

}

void main()

{

init();

while(1)

{

num=read_address(0x40);

bai=num/100;

shi=num/10%10;

ge=num%10;

display(ge,shi,bai);

}

}