MAX7219非编码模式.zip_MAX7219_MAX7219非编码模式_around5qn_max7219编码

#include<reg52.h> #include<intrins.h> #define SHUTDOWN 0x0c //是否关机 #define DECODE_MODE 0x09 //编码模式 开启0x09 关0x00 #define INTENSITY 0x0a //亮度变化 #define SCAN_LIMIT 0x0b //开启哪些位 #define DISPLAYTEST 0x0f //显示测试 sbit DIN=P3^4; sbit LOAD=P3^5; sbit CLK=P3^6; sbit ACC0=ACC^0; sbit ACC7=ACC^7; unsigned char code table[10]={ 0x7E,0x30,0x6D,0x79,0x33,0x5B,0x5F,0x70,0x7F,0x7B // 0x7e,0x30,0x6d,0x79,0x33,0x5b,0x5f,0x70,0x7f,0x7b,0x77,0x1f,0x4e,0x3d,0x4f,0x47,0x01,0x37,0x0e,0x67,0x1d,0x15,0x3e,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; unsigned char code seg[10]={ 0x7E,0x30,0x6D,0x79,0x33,0x5B,0x5F,0x70,0x7F,0x7B }; unsigned char numbers[8]; /*void WriteMAX7219_bit(bit dat) //写入一位 { CLK=0; DIN=dat; CLK=1; } */ void MAX_write(unsigned char ch) // 非BCD码模试 以8位字节进行写值 { unsigned char j,ads; for(j=0;j<8;j++) //8位 { ads=ch&0x80; //取最高值 CLK = 0; //时钟线置低 if(ads) DIN = 1; else DIN = 0; ch=ch<<1; //左移1位 CLK=1; //上升沿,DIN的数据写入7219 } } void MAX7219(unsigned char addr, unsigned char num) // 非BCD码模试 写地址写数据 { LOAD = 0; _nop_(); MAX_write(addr); _nop_(); MAX_write(num); _nop_(); LOAD = 1; //锁存 } void WriteByte7219(unsigned char Dat) ///////////////////////////////////////////// { unsigned char i; ACC=Dat; for(i=8;i>0;i--) { DIN=ACC7; CLK=1; _nop_(); _nop_(); CLK=0; ACC=ACC<<1; } } void WriteMAX7219_2bytes(unsigned char dat1,unsigned char dat2) //连续写入两个字节////////////////////////// { unsigned char temp; temp=0x80; CLK=0; DIN=0; LOAD=0; // WriteByte7219(dat1); // WriteByte7219(dat2); MAX_write(dat1); MAX_write(dat2); LOAD=1; } void InitMax7219() //初始化 { WriteMAX7219_2bytes(DECODE_MODE,0x00); //设置所有数码管为B CODE编码模式 0xff 非BCD码模试 WriteMAX7219_2bytes(INTENSITY,0x08); //设置亮度为最大 WriteMAX7219_2bytes(SCAN_LIMIT,0x07); //设置7个数码管全开 WriteMAX7219_2bytes(DISPLAYTEST,0); WriteMAX7219_2bytes(SHUTDOWN,0x01); //设置为开机 } void display() { unsigned char i; for(i=0;i<8;i++) { WriteMAX7219_2bytes(seg[i],i); } } void delay() { unsigned int n; n=40000; while(n--); } void main() { unsigned char t,NS,NS_S,NS_G; NS=18; NS_S=NS/10; //????,?? NS_G=NS%10; InitMax7219(); MAX7219(0x01,0x47); MAX7219(0x02,seg[NS_S]); MAX7219(0x03,seg[NS_G]); MAX7219(0x04,seg[3]); MAX7219(0x05,seg[4]); MAX7219(0x06,seg[5]); MAX7219(0x07,seg[6]); MAX7219(0x08,seg[7]); // display(); t=0x80; while(1) { P0=t; P1=t; P2=t; t=_cror_(t,1); delay(); } }