数码管多位计数程序和原理(比如从00--99)答:define k1 P1_7//开始定义p1_7时出错 unsigned char i,b,count=0;unsigned char code table[]={0x3F,0x6,0x5B,0x4F,0x66,0x6D,0x7D,0x7,0x7F,0x6F};void delay (){ for(i=4;i>0;i--)for(b=248;b>0;b--);//第一次忘了打都逗号要多注意 } void js (){ P2=0xfe;P0=...
用C51单片机带存储播放功能的简易电子琴设计 要求如图答:0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,} ;// 音阶频率表 低八位 code unsigned char FREQL[]={ 0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i 0xEE,0x44, 0x6B,...
这是一个利用89C52RC单片机蜂鸣器演奏生日快乐歌。请高手帮我解释一下...答:code unsigned char FREQH[]={0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8, 0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i 0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,} ;// 音阶频率表 低八位,也就是发...