dz.rar_LED 动态扫描_点阵扫描

#include "reg51.h" //51头文件 #include "intrins.h" #include "string.h" sbit DZ_DINL=P1^4; //控制点阵列的595数据输入 sbit DZ_DINH=P1^5; //控制点阵行的595数据输入 sbit DZ_OE =P1^2; //所有595的输出使能 sbit DZ_LC =P0^4; //所有595的锁存信号 sbit DZ_SC =P1^7; //所有595的时钟信号 void DZ_SetValue_2595(unsigned char datl,unsigned char dath); void DZ_UpdateBuffer(unsigned char *pbuf); void DZ_Init(); void DZ_Enable(); void DZ_Disable(); void delay(unsigned int time); //延时函数 unsigned char dz_buf[8]; //定时器0中断处理中将访问此数组 //dz_buf在点阵部分定义，这里对外部变量声明，才可访问 void Timer0_Init(); void Timer0_Start(); void Timer0_Stop(); unsigned char h_sel=0; //此变量取值0~7，0x80>>h_sel 用以选中8X8点阵的某一行，使用详见中断服务函数 void delay(unsigned int time) { while(time--); } void Timer0_Init() { TMOD=0x01; //设置定时器0为模式1(16位定时器) TH0=0xfe; TL0=0x32; //TH0与TL0拼成了16位的计数寄存器 //这里设置其初值为 0xfe32，修改此值将改变定时器0中断的触发频率 //定时器启动后它以CPU频率自增至0xffff触发中断 ET0=1; //使能定时器0中断 EA=1; //使能全局中断(要使某中断真正使能，除了置位相应的中断使能位，还必须置位全局中断使能位) TR0=1; } void Timer0_Start() { TR0=1; //启动定时器0，定时器0启动后[TH0-TL0]立即从其初始值开始自增 } void Timer0_Stop() { TR0=0; //停止定时器0，定时器0停止后[TH0-TL0]立即停止自增 } void Timer0_Int() interrupt 1 { Timer0_Stop(); //进入中断后，首先停止定时器0，防止服务函数运行时，中断再被触发，影响代码执行 TH0=0xfe; TL0=0x32; //为了使定时器0中断以一定频率重复触发，将[TH0-TL0]恢复为初值 //中断服务代码添加在这里 DZ_SetValue_2595(dz_buf[h_sel],0x80>>h_sel); //将行与并上的两个字节同时写到两片595中 h_sel++;h_sel%=8; //h_sel自增，在0~7不断变化 //以上是中断服务代码 Timer0_Start(); //中断服务代码运行完后，退出中断时，重新启动定时器0 } void DZ_SetValue_2595(unsigned char datl,unsigned char dath) { unsigned char i; datl=~datl; DZ_OE=1; //向595写入数据前，先将输出使能关闭 for(i=0;i<8;i++) //向两路(行与列)上的595同时写入数据 { DZ_DINL=(datl&1); DZ_DINH=(dath&1); DZ_SC=0; DZ_SC=1; //时钟上升沿时数据被写入 datl>>=1;dath>>=1; } DZ_LC=0; DZ_LC=1; //写入595的数据，需要进行锁存才能输出到输出端，上升沿数据被锁存 DZ_OE=0; //打开所有595的输出使能 } void DZ_Init() { Timer0_Init(); } void DZ_Enable() { Timer0_Start(); } void DZ_Disable() { Timer0_Stop(); } void DZ_UpdateBuffer(unsigned char *pbuf) { unsigned char i=0; DZ_Disable(); for(i=0;i<8;i++) { dz_buf[i]=pbuf[i]; } DZ_Enable(); } unsigned char code eng_buf[26][8]= //26个英文字母的8X8字符的字模数据 { {0x00,0x91,0x9A,0xBA,0x7A,0x24,0x24,0x00},/*"W",0*/ {0x00,0x18,0x18,0x24,0x7E,0x42,0x81,0x00},/*"A",1*/ {0x00,0x62,0x62,0x52,0x4A,0x46,0x46,0x00},/*"N",2*/ {0x00,0x3C,0x62,0x40,0x4E,0x62,0x3E,0x00},/*"G",3*/ {0x00,0xC2,0x64,0x38,0x10,0x10,0x10,0x00},/*"Y",4*/ {0x00,0x18,0x18,0x24,0x7E,0x42,0x81,0x00},/*"A",5*/ {0x00,0x3C,0x66,0x42,0x42,0x66,0x3C,0x00},/*"O",6*/ {0x00,0x7C,0x46,0x42,0x42,0x46,0x7C,0x00},/*"D",7*/ {0x00,0x18,0x18,0x24,0x7E,0x42,0x81,0x00},/*"A",8*/ {0x00,0x3C,0x42,0x1C,0x02,0x42,0x3C,0x00},/*"3",9*/ {0x00,0x3C,0x42,0x3C,0x42,0x42,0x3C,0x00},/*"8",10*/ {0x00,0x46,0x48,0x50,0x68,0x44,0x42,0x00},/*"K",11*/ {0x00,0x42,0x42,0x42,0x42,0x42,0x3C,0x00},/*"U",12*/ {0x00,0x18,0x18,0x24,0x7E,0x42,0x81,0x00},/*"A",13*/ {0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x00},/*"I",14*/ {0x00,0x40,0x40,0x40,0x40,0x40,0x7E,0x00},/*"L",15*/ {0x00,0x7E,0x40,0x7E,0x40,0x40,0x7E,0x00},/*"E",16*/ {0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x00},/*"I",17*/ {0x00,0x40,0x40,0x40,0x40,0x40,0x7E,0x00},/*"L",18*/ {0x00,0x3C,0x66,0x42,0x42,0x66,0x3C,0x00},/*"O",19*/ {0x00,0x81,0x42,0x44,0x24,0x38,0x10,0x00},/*"V",20*/ {0x00,0x7E,0x40,0x7E,0x40,0x40,0x7E,0x00},/*"E",21*/ {0x00,0xC2,0x64,0x38,0x10,0x10,0x10,0x00},/*"Y",22*/ {0x00,0x3C,0x66,0x42,0x42,0x66,0x3C,0x00},/*"O",23*/ {0x00,0x42,0x42,0x42,0x42,0x42,0x3C,0x00},/*"U",24*/ }; void main() { unsigned int index=0; DZ_Init(); //初始化点阵，启动点阵动态扫描 while(1) { DZ_UpdateBuffer(eng_buf[index++]); //更新显示缓冲数组的内容 index%=25; delay(5000);delay(10000); //延时 delay(5000);delay(10000); delay(5000);delay(10000); } while(1); }