AVR CH451驱动程序

AVR CH451驱动程序头文件

#ifndef _CH451_H 
#define _CH451_H 
#include  
//CH451命令宏定义 
#define CH451_RESET     0x0201             //复位

#define CH451_LEFT MOV    0x0300             //设置移动方式-左移 
#define CH451_LEFTCYC   0x0301             //设置移动方式-左循 
#define CH451_RIGHT MOV   0x0302             //设置移动方式-右移 
#define CH451_RIGHTCYC  0x0303             //设置移动方式-右循  
#define CH451_SYSOFF    0x0400             //关显示、键盘、看门狗 
#define CH451_SYSON1    0x0401             //开显示 
#define CH451_SYSON2    0x0403             //开显示、键盘 
#define CH451_SYSON3    0x0407             //开显示、键盘、看门狗功能 
#define CH451_DSP       0x0500             //设置默认显示方式 
#define CH451_BCD       0x0580             //设置BCD译码方式 
#define CH451_TWINKLE   0x0600             //设置闪烁控制 
#define CH451_KEY       0x0700             //读键盘代码 
#define CH451_DIG0      0x0800             //数码管位0显示 
#define CH451_DIG1      0x0900             //数码管位1显示  
#define CH451_DIG2      0x0A00             //数码管位2显示 
#define CH451_DIG3      0x0B00             //数码管位3显示 
#define CH451_DIG4      0x0C00             //数码管位4显示 
#define CH451_DIG5      0x0D00             //数码管位5显示  
#define CH451_DIG6      0x0E00             //数码管位6显示  
#define CH451_DIG7      0x0F00             //数码管位7显示 
//端口宏定义 
#define DCLK (1<<;PA3) 
#define DIN (1<<;PA5) 
#define LOAD (1<<;PA7) 
#define DOUT (1<<;PE5) 
#define CH451_DCLK_HIGH PORTA|=DCLK        //时钟信号 
#define CH451_DCLK_LOW  PORTA&=~DCLK  
#define CH451_DIN_HIGH  PORTA|=DIN        //数据输入 
#define CH451_DIN_LOW   PORTA&=~DIN  
#define CH451_LOAD_HIGH PORTA|=LOAD        //命令加载信号，上升延激活 
#define CH451_LOAD_LOW  PORTA&=~LOAD  
#define CH451_DOUT      PINE&DOUT          //键盘中断和键值数据输出 
extern  uchar KeyValue;                    //键值全局声明 
//函数申明 
void CH451_WriteCommand(uint Command);     //CH451写命令函数 
void CH451_Init();                         //CH451初始化函数 
void CH451_GetKeyValue();                  //CH451键盘代码读取函数 
void CH451_DisplayDig(uchar DIG,uchar Data,uchar Point);//CH451显示一位数码管函数 
#endif 

AVR CH451驱动程序文件

#include "CH451.h" 
uchar KeyValue;//键值 
//共阴数码管编码表 
const uchar DSYCode[18]={0x3F,0x06,0x5B,0x4F,//0,1,2,3 
                         0x66,0x6D,0x7D,0x07,//4,5,6,7 
                         0x7F,0x6F,0x77,0x7C,//8,9,A,b 
                         0x39,0x5E,0x79,0x71,//C,d,E,F 
                         0x40,0x00};//-,全灭 
const uint DigCode[8]={CH451_DIG0,CH451_DIG1,CH451_DIG2,CH451_DIG3, 
                       CH451_DIG4,CH451_DIG5,CH451_DIG6,CH451_DIG7}; 
//键盘编码表 
const uchar KeyCode[16]={0x40,0x41,0x42,0x43,//0,1,2,3 
                         0x48,0x49,0x4A,0x4B,//4,5,6,7 
    0x50,0x51,0x52,0x53,//8,9,A,B 
    0x58,0x59,0x5A,0x5B};//C,D,E,F 
//CH451写命令函数 
void CH451_WriteCommand(uint Command){ 
    uchar i; 
    CH451_LOAD_LOW;                       //命令开始 
    for(i=0;i<12;i++){                    //送入12位数据，低位在前 
        if(Command&0x0001) CH451_DIN_HIGH;//输出低位数据 
        else CH451_DIN_LOW; 
        CH451_DCLK_LOW; 
        Command>>=1;                      //数据右移一位 
        CH451_DCLK_HIGH;                  //上升沿有效 
    } 
    CH451_LOAD_HIGH;                      //加载数据 
}   
//CH451初始化函数 
void CH451_Init(){ 
    CH451_DIN_LOW;                   //低电平使能串行接口 
    CH451_DIN_HIGH; 
    CH451_WriteCommand(CH451_RESET); //复位CH451 
    CH451_WriteCommand(CH451_SYSON2);//开显示、键盘 
    DDRE&=~DOUT;                     //PE5输入方向 
    EICRB|=(1<    EIMSK|=(1<
} 
//CH451键值读取函数 
void CH451_GetKeyValue(){ 
    uchar i; 
    uchar GetKeyValue=0x00;           //键盘代码 
    CH451_WriteCommand(CH451_KEY);    //发送读取键值命令 
    for(i=0;i<7;i++){ 
        GetKeyValue<<=1; 
        if(CH451_DOUT) GetKeyValue|=1;//从高到低读入451的数据 
        else GetKeyValue|=0; 
        CH451_DCLK_LOW;               //下降沿有效 
        CH451_DCLK_HIGH; 
    } 
    if(GetKeyValue==0x00) return;     //读出键码为0跳过 
    for(i=0;i<16;i++){                //查找键盘代码对应的键值 
        if(GetKeyValue==KeyCode){ 
     KeyValue=i; 
     break; 
} 
    } 
} 
//CH451显示一位数码管，DIG选择数码管，Data要显示的数字，Point是否显示小数点 
void CH451_DisplayDig(uchar DIG,uchar Data,uchar Point){ 
    if(Point==1) CH451_WriteCommand(DigCode[DIG]|(DSYCode[Data]|0x80)); 
    else CH451_WriteCommand(DigCode[DIG]|DSYCode[Data]); 
}