//带锁存功能的串入并出芯片。这里给出74hc595的c51驱动程序。
//定时器晶体振荡器11.0592M.
＃i nclude<reg51.h>
＃i nclude <INTRINS.H>
#define uint unsigned int
#define uchar unsigned char
#define nop() _nop_();_nop_();
sbit CLK=P2^0;
sbit DAT=P2^1;
sbit RCLK=P2^2;
//sbit CS=P2^3;
uchar code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};//0-9,-,全灭
void sendbyte(uchar byte)
{
uchar num,c;
num=tab[byte];
for(c=0;c<8;c++)
{
CLK=0;
DAT=num&0x80;
num=num<<1;
CLK=1;
}
// RCLK=0;
// nop();
// nop();
// RCLK=1;
}
void out595(void)
{
RCLK=0;
nop();
RCLK=1;
}
void display(uchar word)
{
uchar i,j;
i=word/10;
j=word-10*i;
sendbyte(j);
sendbyte(i);
out595();
}
main()
{
while(1)
{
display(19);
display(86);
}
while(1);
}
|
楼主
