点阵流动广告模拟_单片机C语言实例(纯C语言源代码).zip

/*----------------------------------------------- 名称：双色点阵 论坛：www.doflye.net 编写：shifang 修改：无 内容：使用hc595驱动双色点阵 ------------------------------------------------*/ #include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义 #include <intrins.h> unsigned char segout[8]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //8列 unsigned char code tab[]={ 0x00,0x38,0x04,0x38,0x04,0x38,0x00,0x00, // w 0x00,0x38,0x04,0x38,0x04,0x38,0x00,0x00, // w 0x00,0x38,0x04,0x38,0x04,0x38,0x00,0x00, // w 0x00,0x06,0x06,0x00,0x00,0x00,0x00,0x00, // . 0x00,0x00,0x0C,0x12,0x12,0x7E,0x00,0x00, // d 0x00,0x00,0x1C,0x22,0x22,0x1C,0x00,0x00, // o 0x00,0x10,0x3E,0x50,0x40,0x00,0x00,0x00, // f 0x00,0x00,0x00,0x7E,0x02,0x04,0x00,0x00, // l 0x00,0x00,0x71,0x09,0x09,0x7E,0x00,0x00, // y 0x00,0x00,0x3C,0x52,0x52,0x32,0x00,0x00, // e 0x00,0x06,0x06,0x00,0x00,0x00,0x00,0x00, // . 0x00,0x00,0x1C,0x22,0x22,0x22,0x00,0x00, // c 0x00,0x00,0x1C,0x22,0x22,0x1C,0x00,0x00, // o 0x00,0x00,0x1E,0x20,0x3E,0x20,0x1E,0x00, // m 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 // 空格 }; /*------------------------------------------------ 硬件端口定义 ------------------------------------------------*/ sbit LATCH = P1^0; sbit SRCLK= P1^1; sbit SER = P1^2; sbit LATCH_B = P2^2; sbit SRCLK_B= P2^1; sbit SER_B= P2^0; /*------------------------------------------------ uS延时函数，含有输入参数 unsigned char t，无返回值 unsigned char 是定义无符号字符变量，其值的范围是 0~255 这里使用晶振12M，精确延时请使用汇编,大致延时 长度如下 T=tx2+5 uS ------------------------------------------------*/ void DelayUs2x(unsigned char t) { while(--t); } /*------------------------------------------------ mS延时函数，含有输入参数 unsigned char t，无返回值 unsigned char 是定义无符号字符变量，其值的范围是 0~255 这里使用晶振12M，精确延时请使用汇编 ------------------------------------------------*/ void DelayMs(unsigned char t) { while(t--) { //大致延时1mS DelayUs2x(245); DelayUs2x(245); } } /*------------------------------------------------ 发送字节程序 带有方向参数，可以选择从高位节写入或者低位写入 ------------------------------------------------*/ void SendByte(unsigned char dat,bit direction) { unsigned char i,temp; if(direction==0) temp=0x80; else temp=0x01; for(i=0;i<8;i++) { SRCLK=0; SER=dat&temp; if(direction==0) dat<<=1; else dat>>=1; SRCLK=1; } } /*------------------------------------------------ 发送双字节程序 ------------------------------------------------*/ void Send2Byte(unsigned char dat1,unsigned char dat2,bit direction) { SendByte(dat1,direction); SendByte(dat2,direction); } /*------------------------------------------------ 595锁存程序 ------------------------------------------------*/ void Out595(void) { LATCH=0; _nop_(); LATCH=1; } /*------------------------------------------------ 发送位码字节程序 使用另外一片单独595 ------------------------------------------------*/ void SendSeg(unsigned char dat) { unsigned char i; for(i=0;i<8;i++) //发送字节 { SRCLK_B=0; SER_B=dat&0x80; dat<<=1; SRCLK_B=1; } LATCH_B=0; //锁存 _nop_(); LATCH_B=1; } /*------------------------------------------------ 主程序 ------------------------------------------------*/ void main() { unsigned char i,k,l; while(1) { for(k=0;k<=112;k++) //所有的字符个数 for(l=20;l>0;l--) //延时长度,改变此值可以改变流动速度 for(i=0;i<=7;i++) //8列显示 { SendSeg(segout[7-i]); Send2Byte(~(*(tab+i+k)),0xff,1); //写入字节方向改变 Out595(); DelayMs(1); Send2Byte(0xff,0xff,0);//delay(10); //防止重影 Out595(); } } }