anjian.c

cf初始化程序（包括串口初始化和端口初始化）

#include<c8051f340.h>
#include <stdio.h>
sbit TXD=P0^4;
sbit RXD=P0^5;
sbit line=P0^0;
sbit row=P0^1;
#define uchar unsigned char
char code tab[]={0xFC,0x60,0xDA,0xF2,0x66,0xB6,0xBE,0xE0,0xFE,0xF6};

void portInitiate(void)
{
  unsigned int i;
  XBR0=0X01;      //输入输出端口功能选择寄存器
  XBR1=0X40;
  XBR2=0X00;
  P0SKIP=0XCF;   
  P1SKIP=0XCE;
  P2SKIP=0Xff;
  P3SKIP=0Xff; 
  EMI0CF=0x05;    
  EMI0TC=0X6D;    //外部存储器控制器  
  VDM0CN=0X80;    //VDD寄存器
  RSTSRC=0X01;    //复位源寄存器
  PCA0MD=0X88;    //关闭看门狗
    OSCXCN=0xE7;
    for (i=0;i<3000;i++);  // Wait 1ms for initialization
    while ((OSCXCN & 0x80) == 0);
	{
    //OSCICN    = 0x00;
    OSCICL=0X00;
    CLKMUL=0x02;
    CLKSEL=0x20;
	}
  P0MDIN=0XFE;
  P0MDOUT=0XD3;   //输出方式寄存器
  P1MDOUT=0XCE;
  P2MDOUT=0XFF;
  P4MDOUT=0Xff;
  P3MDOUT=0XFF;
}
void delay(uchar n)
{
  uchar i;
  unsigned int j;
  for(i=0;i<n;i++)
  {
    for(j=0;j<1000;j++);
  }
}

void main(void)
{
  unsigned int i_data;
  portInitiate();
  P4=0x00;
  delay(3);
  while(1)
  {
  line=0;
  row=1;
  i_data=P2;
  if(P2!=0xff)
  {
    delay(3);
    if(P2!=0xff)
    switch(i_data)
	{
	  case 0xfe:P4=0xf0;break;
      case 0xfd:P4=0x70;break;
      case 0xfb:P4=0xb0;break;
      case 0xf7:P4=0x30;break;
	  case 0xef:P4=0xd0;break;
	  case 0xdf:P4=0xa0;break;
	  case 0xbf:P4=0x70;break;
	  case 0x7f:P4=0x80;break;
	  default:break;
	} 
  }
  else P4=0xff;
}
}