用AVR实现《祝你生日快乐》.docx

/*=程序说明=项目名称:祝你生日快乐作 者: 小混混要学习创建日期:修改说明:程序说明:(1)CPU 型号:mega16l(2)时钟频率:(3)实现功能:(4)程序概述:=*/=头文件加载=#include #include #define Fosc 7372800 /Hz#define uint8 unsigned char#define uint16 unsigned int#define uint32 unsigned long int#define sint8 char#define sint16 int/=端口声明=#define BeepIO PORTC.5 /#define BeepDDR DDRC.5 /=全局常量声明=uint16 flash FreTable = 1000,262,293,330,349,392,440,494,523;uint8 flash music =0x05,0x08, 0x05,0x08,0x06,0x04, 0x05,0x04, 0x11,0x04,0x07,0x02, 0x05,0x08, 0x05,0x08,0x06,0x04, 0x05,0x04, 0x12,0x04,0x11,0x02,0,0;/=全局变量声明=uint8 YQ = 0;/YQ = musici 4;uint8 YD = 0;/YD = musici & 0x0f;uint8 YF = 0;/YC = musici+1;uint32 OneYS = 2400; /ms 一个全音符的时间长度uint32 PlayTimeMax = 2;uint32 PlayTimeCount = 0;uint32 YYi=0;/=函数声明=void init(void);/函数初始化/=主函数=void main()/主函数 uint16 YYi = 0; /-系统初始化- init(); while(1) /=功能子函数=/*-函数名称：功 能：输 入：输 出：说 明：-*/void init(void) BeepIO = 1; / BeepDDR = 1; / /1、配置为CTC模式。 TCCR1B |= (0 WGM13) | (1 WGM12); TCCR1A |= (0 WGM11) | (0 WGM10); /2、选择合适的分频系数。/1分频 TCCR1B |= (0 CS12) | (0 CS11) | (1 CS10); /3、计算与赋初始值 TCNT1 = 0; OCR1A = 3; /逢3进中断 /4、开定时器1 CTC A中断。 TIMSK |= (1 4; YD = musicYYi & 0x0f; YF = musicYYi+1; OCR1A =( Fosc / FreTableYD ) YQ; PlayTimeMax = (OneYS * FreTableYD YQ)/ YF /1000; if(YD=0) BeepIO = 1; PlayTimeCount = 0; /5、开全局中断。 #asm(sei) YYi = YYi + 2