将16*16点阵看作四个8*8点阵，分别点亮，快速扫描实现字幕显示
数组指针右移实现字幕向左滚动的显示效果
硬件连接：74HC595四片级联，点阵屏的行输入连接HC595第一，二级输出，列输入连接第三，四级输出。74HC595的输入，大家可以根据各自的喜好和习惯连接，然后改掉端口定义。
//定义 74HC595 在电路连接中对应的 STC89C51 I/O口/*-- 当后续电路改变时，只需在此处更换IO口的定义即可，无需再回到函数中改变内容--*/sbit SER = P0^0; //74HC595 字符输入端 SERsbit SCK = P0^1; //74HC595 移位寄存器钟控端 SCKsbit RCK = P0^2; //74HC595 并行输出钟控端 RCK
以下是我写的源码，可供大家参考
初学单片机，16*16点阵是昨天学的，还有很多理解不深刻的地方，或许有跟简单的方法，欢迎各位提出更好的意见或建议
#include <REGX52.H>//定义一个数组存放需要显示的字符内容unsigned char code Matrix_led[] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*-- 文字: 计 --*//*-- 宋体12; 此字体下对应的点阵为：宽x高=16x16 --*/0x02,0x02,0x42,0x33,0x00,0x02,0x02,0x02,0x02,0xFF,0x02,0x02,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0xFE,0x04,0x08,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,/*-- 文字: 算 --*//*-- 宋体12; 此字体下对应的点阵为：宽x高=16x16 --*/0x10,0x20,0xCF,0x4A,0x6A,0x4A,0x4A,0x0A,0x2A,0xCA,0x4A,0x6A,0x4F,0x40,0x40,0x00,0x08,0x08,0xE9,0xAA,0xBC,0xA8,0xA8,0xA8,0xA8,0xA8,0xBF,0xA8,0xE8,0x08,0x08,0x00,/*-- 文字: 机 --*//*-- 宋体12; 此字体下对应的点阵为：宽x高=16x16 --*/0x08,0x08,0x0B,0xFF,0x09,0x08,0x00,0x7F,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,0x00,0x20,0xC0,0x00,0xFF,0x00,0xC1,0x06,0xF8,0x00,0x00,0x00,0xFC,0x02,0x02,0x1E,0x00,/*-- 文字: 学 --*//*-- 宋体12; 此字体下对应的点阵为：宽x高=16x16 --*/0x02,0x0C,0x88,0x69,0x09,0x09,0x89,0x69,0x09,0x09,0x19,0x28,0xC8,0x0A,0x0C,0x00,0x20,0x20,0x20,0x20,0x20,0x22,0x21,0x7E,0x60,0xA0,0x20,0x20,0x20,0x20,0x20,0x00,/*-- 文字: 院 --*//*-- 宋体12; 此字体下对应的点阵为：宽x高=16x16 --*/0x00,0x7F,0x44,0x5A,0x61,0x08,0x30,0x24,0x24,0xA4,0x64,0x24,0x24,0x28,0x30,0x00,0x00,0xFF,0x20,0x10,0xE0,0x01,0x82,0x8C,0xF0,0x80,0x80,0xFC,0x82,0x82,0x8E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,};//定义 74HC595 在电路连接中对应的 STC89C51 I/O口/*-- 当后续电路改变时，只需在此处更换IO口的定义即可，无需再回到函数中改变内容--*/sbit SER = P0^0; //74HC595 字符输入端 SERsbit SCK = P0^1; //74HC595 移位寄存器钟控端 SCKsbit RCK = P0^2; //74HC595 并行输出钟控端 RCK//控制四级级联 74HC595 的RCK端unsigned char _74HC595_RCK_CTRI = 0;//数组长度unsigned char length = sizeof(Matrix_led) / sizeof(Matrix_led[0]);/*------------------------------------------------------------------------------*///函数声明: 用户调用函数/*------------------------------------------------------------------------------*/void Delay1ms (unsigned char xms);void Delay10us(unsigned int xus);void Matrix_Led_Init( void );void Matrix_Led_Show(unsigned char* Matrix_led_code);void Matrix_Led_Column(unsigned char col, unsigned char led_code_col, unsigned char k);void _74HC595_WriteByte(unsigned char led_code_col);/*------------------------------------------------------------------------------*///函数定义/*------------------------------------------------------------------------------*//*** @brief 点阵屏初始化* @param 无* @retval 无*/void Matrix_Led_Init( void ){SCK = 1;RCK = 1;}/*** @brief 在16*16点阵屏上显示字符内容* @param 无* @retval 无*/void Matrix_Led_Show(unsigned char* Matrix_led_code){unsigned char k;unsigned char m = 0, //检测字符序列s = 0; //防止指针越界访问for(;s <= length - 129; Matrix_led_code++, s++){m++;if(m == 17){m = 1;Matrix_led_code += 16; //数组指针右移，每当连续显示完16帧时，跳过16个字符，跳到下一个字}for(k = 1; k <= 4; k++){unsigned char i, i2;for(i = 0; i <= 7;i ++) //循环，依次显示第一列到第八列{if((i + 8*(k - 1)) % 16 >= 16 - m){i2 = i + 8*(k - 1) + 16;//当某一列显示到某个字的最后一列时，跳过16个字节，跳到下一个字}else{i2 = i + 8*(k - 1);}Matrix_Led_Column(i, Matrix_led_code[i2], k);}}}}/*** @brief 在点阵屏指定的一列上显示一个8位字符数据* @param led_cdoe_col 要显示的一个字符数据* @param col 说明了字符要显示在哪一列的位置上* @retval 无* @explain 将16*16点阵看作四个8*8点阵，依次分别显示一个屏幕上的内容，并快速刷新*/void Matrix_Led_Column(unsigned char col, unsigned char led_code_col, unsigned char k){unsigned char i;if(k == 1){i = 0x00;} //显示左上角if(k == 2){i = 0x01;}//显示右上角if(k == 3){i = 0x10;}//显示左下角if(k == 4){i = 0x11;}//显示右下角//选列if(i == 0x00 || i == 0x10){_74HC595_WriteByte(~0x00);_74HC595_WriteByte(~(0x80 >> col));}else{_74HC595_WriteByte(~(0x80 >> col));_74HC595_WriteByte(~0x00);}//选行if(i == 0x00 || i == 0x01){_74HC595_WriteByte(0x00);_74HC595_WriteByte(led_code_col);}else{_74HC595_WriteByte(led_code_col);_74HC595_WriteByte(0x00);}}/*** @brief 利用74HC595四级级联，将四个字符并行输出。每次调用此函数时led_code_col传进一个字符，_74HC595_RCK_CTRI累加计数每当函数中传入四个字符时并行输出，_74HC595_RCK_CTRI置0，重新计数* @param led_cdoe_col 一个字符数据* @retval 无*/void _74HC595_WriteByte(unsigned char led_code_col){unsigned char i;for(i = 0; i <= 7; i++) //将led_code_col传入的字符按位(从低位到高位)放入移位寄存器{SER = led_code_col & ( 0x01 << i ); //从低位到高位依次读取位数值SCK = 0;;; //控制移位寄存器时钟，将数据送入移位寄存器SCK = 1; //将 SCK 钟控端复位}_74HC595_RCK_CTRI ++; //是全局变量//控制四级级联的74HC595 RCK端 //其初值为0，SER端每进入一个字符时，74HC595_RCK_CTRI ++//当74HC595_RCK_CTRI == 4 时（进入四个字符）//将RCK 置1，并行输出所有数据//并将74HC595_RCK_CTRI置0，重新计数if(_74HC595_RCK_CTRI >= 4) //当有4个字符数据时{RCK = 0;;;//通过 RCK 控制74HC595并行输出数据RCK = 1; //RCK复位_74HC595_RCK_CTRI = 0;}}void main(){Matrix_Led_Init();//点阵屏初始化while(1){Matrix_Led_Show(Matrix_led);}}
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