南邮基于8255的8LED显示语音播放机设计..

1、设计名称：基于8255的8显示语音播放机设计一、设计要求 实验中需要的信源，可以通过处理一段WAV文件，将其变为一段数据表进行实验。基本要求：1 将处理过的数据通过单片机进行存储（信号固化）。2 用D/A转换器回放存储的信号。3 通过模拟示波器显示回放的波形。4 在数码管或LCD上显示回放波形的参数（最大/最小幅值，波形播放时间）。发挥部分：1 在实验允许的条件下，采用更灵活的存放方法。2 多段信源管理和播放。动态显示格式：自定二、设计原理声音文件已经放在程序里面，一开始运行，首先将程序里面的声音数据转存储到SRAM里，也就是6264里，显示的话，可以显示出播放时间，和数据的最大值和最小值，最

2、大值和最小值是自动进行切换的，1秒为间隔，从SRAM读取数据，进行DA转换就可以看出波形了。三、设计过程流程图如下：开始显示分钟显示10ms显示秒钟显示“：”显示“：”结束显示流程图开始系统初始化键盘扫描显示时间储存数据读取数据A/D转换Flag1 = = 1YNFlag2 = = 1D/A转换YN开始初始化有键按下？Key1按下？Flag1=1YKEY1按下？延时消抖Flag2=1开始D/A结束NNNYY开始A/D时间清零时间清零系统主流程图 键盘流程图对应的C语言程序如下：/*基于8255的8LED显示语音播放机设计程序*/#include<reg52.h>#include&l

3、t;absacc.h>/*宏定义*/#define uint unsigned int#define uchar unsigned char/*芯片端口地址定义*/#define COM8255 XBYTE0X7FFF /8255的命令口#define PA8255 XBYTE0X1FFF /8255的PA#define PB8255 XBYTE0X3FFF /8255的PB#define PC8255 XBYTE0X5FFF /8255的PC#define DAC0832 XBYTE0XEFFF /DAC0832口uchar dis_buf=0xc0,0x40,0xc0,0xff,0x

4、c0,0x40,0xc0,0xc0; /数码管显示缓存，格式为MM-NN-SSuchar code du_code=0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90, ; /8段共阳极数码管显示码值 uchar code bit_code=0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80;/数码管显示的位值 /*系统引脚定义*/sbit key1=P30; /key1sbit key2=P31; /key2sbit CON=P33; /74HC573的锁存端/*定义系统变量*/uchar num=0,second=

5、0; /定义时间变量bit flag1=0,flag2=0; /定义状态标志位uchar count;uchar max=0,min=0; /定义幅值的最大值和最小值uint m_x=0xe000;uchar code music=0x0F,0x01, 0x15,0x02, 0x16,0x02, 0x17,0x66, 0x18,0x03, 0x17,0x02, 0x15,0x02, 0x16,0x01, 0x15,0x02, 0x10,0x02, 0x15,0x00, 0x0F,0x01, 0x15,0x02, 0x16,0x02, 0x17,0x02, 0x17,0x03, 0x18,0x0

6、3, 0x19,0x02, 0x15,0x02, 0x18,0x66, 0x17,0x03, 0x19,0x02, 0x16,0x03, 0x17,0x03, 0x16,0x00, 0x17,0x01, 0x19,0x02, 0x1B,0x02, 0x1B,0x70, 0x1A,0x03, 0x1A,0x01, 0x19,0x02, 0x19,0x03, 0x1A,0x03, 0x1B,0x02, 0x1A,0x0D, 0x19,0x03, 0x17,0x00, 0x18,0x66, 0x18,0x03, 0x19,0x02, 0x1A,0x02, 0x19,0x0C, 0x18,0x0D,

7、0x17,0x03, 0x16,0x01, 0x11,0x02, 0x11,0x03, 0x10,0x03, 0x0F,0x0C, 0x10,0x02, 0x15,0x00, 0x1F,0x01, 0x1A,0x01, 0x18,0x66, 0x19,0x03, 0x1A,0x01, 0x1B,0x02, 0x1B,0x03, 0x1B,0x03, 0x1B,0x0C, 0x1A,0x0D, 0x19,0x03, 0x17,0x00, 0x1F,0x01, 0x1A,0x01, 0x18,0x66, 0x19,0x03, 0x1A,0x01, 0x10,0x02, 0x10,0x03, 0x1

8、0,0x03, 0x1A,0x0C, 0x18,0x0D, 0x17,0x03, 0x16,0x00, 0x0F,0x01, 0x15,0x02, 0x16,0x02, 0x17,0x70, 0x18,0x03, 0x17,0x02, 0x15,0x03, 0x15,0x03, 0x16,0x66, 0x16,0x03, 0x16,0x02, 0x16,0x03, 0x15,0x03, 0x10,0x02, 0x10,0x01, 0x11,0x01, 0x11,0x66, 0x10,0x03, 0x0F,0x0C, 0x1A,0x02, 0x19,0x02, 0x16,0x03, 0x16,0

9、x03, 0x18,0x66, 0x18,0x03, 0x18,0x02, 0x17,0x03, 0x16,0x03, 0x19,0x00, 0x00,0x00; /两只蝴蝶 /*延时子程序*/void delayms(uchar x) /ms延时函数uchar y;for(;x>0;x-)for(y=110;y>0;y-) ;/*键盘扫描程序*/void keyscan()if(key1=0)/判断key1是否被按下delayms(20); /延时消抖if(key1=0)/判断key2是否被按下if(flag1=1)if(m_x<0xFffe)TR0=TR0;/计时开关取反

10、while(!key1);/等待key1松开if(key2=0)/判断key2是否被按下 delayms(20); /延时消抖if(key2=0) /判断key2是否被按下 flag1=flag1; /状态标志位取反if(flag1=1) TR0=1;else TR0=0; /计时开关num=0;second=0;max=0;min=0;m_x=0xe000;while(!key2); /等待key2松开void trans_data() if(flag2=0) dis_buf0=du_codemax/100;dis_buf1=du_codemax%100/10;dis_buf2=du_cod

11、emax%10;else dis_buf0=du_codemin/100;dis_buf1=du_codemin%100/10;dis_buf2=du_codemin%10;dis_buf4=du_codesecond/10;dis_buf5=du_codesecond%10&0x7f;dis_buf6=du_codenum/10;dis_buf7=du_codenum%10; /*系统初始化程序*/void Initial()uint i=0;for(i=0;i<8192;i+)XBYTEm_x=musici;m_x+;m_x=0xE000;CON=1; /锁存器地址锁存COM

12、8255=0x89; /定义8255的A口为输出，B口和C口为输入CON=0;TMOD=0x11; /定义定时器的工作方式TH0=(65536-10000)/256;TL0=(65536-10000)%256; /给T0装初值TH1=(65536-500)/256;TL1=(65536-500)%256; /给T1装初值ET0=1; /开T0的中断ET1=1; /开T1的中断EA=1; /开总中断TR0=0; /关闭T0TR1=1;/*主程序*/void main()uchar temp;Initial(); /系统初始化while(1)keyscan(); trans_data();whil

13、e(flag1=1)/判断状态标志位if(TR0=1)/判断计时是否开始temp=XBYTEm_x; /读取SRAM的值CON=1;DAC0832=temp; /D/A转换CON=0;delayms(1); /延时m_x+; /地址值加1if(m_x=0xfffe)m_x=0xe000; /RAM地址越界，初始化 if(temp>max)max=temp;/提取幅值最大值if(temp<min)min=temp;/提取幅值最小值keyscan(); trans_data();/*定时器0中断程序*/void timer0() interrupt 1TH0=(65536-10000)/256;TL0=(65536-10000)%256; /给定时器0装初值，定义时间精度为0.01snum+; /计数器加1if(num=100)/判断1s时间是否到num=0; /计数器清零second+; /秒加1if(second%2)flag2=1;elseflag2=0;if(second=60) /判断1分钟是否到second=0; /秒清零void timer1() interrupt 3TH1=(65536-500)/256;TL1=(65536-