Question

c51 怎么给8155引脚赋值 格式怎么样

c51 怎么给8155引脚赋值
格式怎么样

Answer 1

/*************** writer:shopping.w ******************/
#include <reg52.h>
#include <absacc.h>
#define uint unsigned int
#define uchar unsigned char
#define PA XBYTE[0x0000] \\PA口地址
#define PB XBYTE[0x0001]\\PB口地址
#define PC XBYTE[0x0002]\\PC口地址
#define COM XBYTE[0x0003]\\控制寄存器地址

uchar code DSY_CODE_Queue[]=
{
0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xa4,0xc0,0xc0,0x80,0xc0,0x80,0xf9,0x80,
0xff,0xff,0xff,0xff,0xff,0xff,0xff
};

uchar code DSY_Index[]=
{
0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80
};

void Delay(uint x)
{
uchar i;
while(x--)
{
for(i=0;i<120;i++);
}
}

void main()
{
uchar i,j,k;
COM = 0x80;\\PA,PB,PC均为普通I/O口输出
while(1)
{
for(j=0;j<40;j++)
{
for(k=0;k<8;k++)
{
PB = DSY_Index[k];//送位选
PA = DSY_CODE_Queue[k+i];//送段码
Delay(1);
}
}
i = (i+1)%15;
}
}