单片机实验平台.ppt

单片机实验平台 原理图 PCB图 单片机 显示驱动 电源模块 串口通信 音频电路 复位电路 程序代码 /***************************************************************************/ #ifndef __SOUNDPLAY_H_REVISION_FIRST__ #define __SOUNDPLAY_H_REVISION_FIRST__ #includereg51.h //************************************************************************** #define SYSTEM_OSC //定义晶振频Z #define SOUND_SPACE 4/5 //定义普通音符演奏的长度分率,//每4分音符间隔 sbit BeepIO = P1^3; //定义输出管脚 unsigned int code FreTab[12] = { 262,277,294,311,330,349,369,392,415,440,466,494 }; //原始频率表 unsigned char code SignTab[7] = { 0,2,4,5,7,9,11 }; //1~7在频率表中的位置 unsigned char code LengthTab[7]= { 1,2,4,8,16,32,64 }; unsigned long Sound_Temp_TH0,Sound_Temp_TL0; //音符定时器初值暂存 unsigned long Sound_Temp_TH1,Sound_Temp_TL1; //音长定时器初值暂存 unsigned char code ch[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};/*0--9*/ unsigned char ii,jj; //unsigned char i,j; //************************************************************************** /*void daley1(void) { unsigned char i,j,k; for(i=0;i5;i++) for(j=0;j255;j++) for(k=0;k255;k++); } */ //**************************************************************************** void InitialSound(void) { BeepIO = 1; Sound_Temp_TH1 = (65535-(1/1200)*SYSTEM_OSC)/256; // 计算TL1应装入的初值 (10ms的初装值) Sound_Temp_TL1 = (65535-(1/1200)*SYSTEM_OSC)%256; // 计算TH1应装入的初值 TH1 = Sound_Temp_TH1; 程序代码 TL1 = Sound_Temp_TL1; TMOD |= 0x11; ET0 = 1; ET1 = 0; TR0 = 0; TR1 = 0; EA = 1; } void BeepTimer0(void) interrupt 1 //音符发生中断 { BeepIO = !BeepIO; TH0 = Sound_Temp_TH0; TL0 = Sound_Temp_TL0; } //************************************************************************** void Play(unsigned char *Sound,unsigned char Signature,unsigned Octachord,unsigned int Speed) { unsigned int NewFreTab[12]; //新的频率表 unsigned char i,j; unsigned long Point,LDiv,LDiv0,LDiv1,LDiv2,LDiv4,CurrentFre,Temp_T,SoundLength; unsigned long Tone,Length,SL,SH,SM,SLen,XG,FD; for(i=0;i12;i