demo451.c

这是一个源码程序包

/////////////////////////////////////
//  Generated Initialization File  //
/////////////////////////////////////

#include "C8051F330.h"
#include "CH451C54.C"
#define  USE_KEY  1
//须主程序定义的参数
sbit   ch451_dclk=P0^3;                          //串行数据时钟上升延激活
sbit   ch451_din=P1^1;		                // 串行数据输出，接CH451的数据输入
sbit   ch451_load=P1^0;                        //串行命令加载，上升延激活
sbit   ch451_dout=P0^7;                        //INT1，键盘中断和键值数据输入，接CH451的数据输出
uchar  ch451_key;		                // 存放键盘中断中读取的键值

// Peripheral specific initialization functions,
// Called from the Init_Device() function

void Port_IO_Init()
{
    // P0.0  -  Unassigned,  Open-Drain, Digital
    // P0.1  -  Unassigned,  Open-Drain, Digital
    // P0.2  -  Unassigned,  Open-Drain, Digital
    // P0.3  -  Unassigned,  Open-Drain, Digital
    // P0.4  -  Unassigned,  Open-Drain, Digital
    // P0.5  -  Unassigned,  Open-Drain, Digital
    // P0.6  -  Unassigned,  Open-Drain, Digital
    // P0.7  -  Unassigned,  Open-Drain, Digital

    // P1.0  -  Unassigned,  Open-Drain, Digital
    // P1.1  -  Unassigned,  Open-Drain, Digital
    // P1.2  -  Unassigned,  Open-Drain, Digital
    // P1.3  -  Unassigned,  Open-Drain, Digital
    // P1.4  -  Unassigned,  Open-Drain, Digital
    // P1.5  -  Unassigned,  Open-Drain, Digital
    // P1.6  -  Unassigned,  Open-Drain, Digital
    // P1.7  -  Unassigned,  Open-Drain, Digital

    XBR1      = 0x40;
}

void Interrupts_Init()
{
    IE        = 0x81;
    IT01CF    = 0x07;
}

// Initialization function for device,
// Call Init_Device() from your main program
void Init_Device(void)
{
    Port_IO_Init();
    Interrupts_Init();
}







//*************************************************
 //延时程序
 void delay(){					//在12P下延时十毫秒
   uchar i,j,k;
   for(i=0;i<10;i++)
     for(j=0;j<40;j++)
       for(k=0;k<120;k++);
  }

//************************************************
void main(){
   uchar a,b,c,d;
   d=0;
   ch451_init();                                  //调用初始化
   ch451_write(0x403);
   ch451_write(0x580);                           //测试送入命令
   ch451_write(CH451_DIG0|0X01);                 //最低位显示1
   EA=1;
   ch451_key=0x0ff;
   while(1){
    while(ch451_key==0xff);	                //等待中断
    a=ch451_key;
    d=a;
    ch451_key=0x0ff;
    ch451_write(0x300);		              //左移两位
    ch451_write(0x300);
    a&=0x3f;			             //显示十进制数据
    b=a;
    a/=10;
    ch451_write(CH451_DIG1|a);
    b%=10;
    ch451_write(CH451_DIG0|b);
     delay();
     c=ch451_read();
     while(c==d)		           //测试按键是否释放
     {
      ch451_write(CH451_DIG0|b|0x80);
      delay();
      c=ch451_read();
     }
    ch451_write(CH451_DIG0|b);
 }
}