[问答]

简易波形发生器

2041 发生器

问答对人有帮助，内容完整，我也想知道答案 0 #include *it key0 = P3^0; it key1 = P3^1; it key2 = P3^2; it key3 = P3^3; **it key4 = P3^4; code unsigned char sin_tab[] = { 0x7F,0x82,0x85,0x88,0x8B,0x8F,0x92,0x95,0x98,0x9B,0x9E,0xA1,0xA4,0xA7,0xAA,0xAD ,0xB0,0xB3,0xB6,0xB8,0xBB,0xBE,0xC1,0xC3,0xC6,0xC8,0xCB,0xCD,0xD0,0xD2,0xD5,0xD7 ,0xD9,0xDB,0xDD,0xE0,0xE2,0xE4,0xE5,0xE7,0xE9,0xEB,0xEC,0xEE,0xEF,0xF1,0xF2,0xF4 ,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFB,0xFC,0xFD,0xFD,0xFE,0xFE,0xFE,0xFE,0xFE ,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFD,0xFD,0xFC,0xFB,0xFB,0xFA,0xF9,0xF8,0xF7,0xF6 ,0xF5,0xF4,0xF2,0xF1,0xEF,0xEE,0xEC,0xEB,0xE9,0xE7,0xE5,0xE4,0xE2,0xE0,0xDD,0xDB ,0xD9,0xD7,0xD5,0xD2,0xD0,0xCD,0xCB,0xC8,0xC6,0xC3,0xC1,0xBE,0xBB,0xB8,0xB6,0xB3 ,0xB0,0xAD,0xAA,0xA7,0xA4,0xA1,0x9E,0x9B,0x98,0x95,0x92,0x8F,0x8B,0x88,0x85,0x82 ,0x7F,0x7C,0x79,0x76,0x73,0x6F,0x6C,0x69,0x66,0x63,0x60,0x5D,0x5A,0x57,0x54,0x51 ,0x4E,0x4B,0x48,0x46,0x43,0x40,0x3D,0x3B,0x38,0x36,0x33,0x31,0x2E,0x2C,0x29,0x27 ,0x25,0x23,0x21,0x1E,0x1C,0x1A,0x19,0x17,0x15,0x13,0x12,0x10,0x0F,0x0D,0x0C,0x0A ,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00 ,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08 ,0x09,0x0A,0x0C,0x0D,0x0F,0x10,0x12,0x13,0x15,0x17,0x19,0x1A,0x1C,0x1E,0x21,0x23 ,0x25,0x27,0x29,0x2C,0x2E,0x31,0x33,0x36,0x38,0x3B,0x3D,0x40,0x43,0x46,0x48,0x4B ,0x4E,0x51,0x54,0x57,0x5A,0x5D,0x60,0x63,0x66,0x69,0x6C,0x6F,0x73,0x76,0x79,0x7C }; //void delay_ms(unsigned int ms) //{ // unsigned char i; // while(ms--) // for(i = 0;i<120;i++); //} #define duan P0 #define wei P2 unsigned char code duan_ma[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92, 0x82,0xf8,0x80,0x90,};//黄板共阳 unsigned char code wei_ma[]= {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; void led_show_delay_us(unsigned int us)//微秒级的延时 { while(us--); } void led_show_number(unsigned char len,unsigned long int num) { unsigned char n; unsigned char temp[8]; temp[7] = num%100000000/10000000; temp[6] = num%10000000/1000000; temp[5] = num%1000000/100000; temp[4] = num%100000/10000; temp[3] = num%10000/1000; temp[2] = num%1000/100; temp[1] = num%100/10; temp[0] = num%10; if(len>8) len =8; for(n = 0;n { wei = wei_ma[n]; duan = duan_ma[temp[n]]; led_show_delay_us(100); } } void main() { unsigned char n,us,vol = 1,sta = 0; while(1) { if(key0 == 0) { while(!key0); vol--; if(vol<1)vol = 1; } if(key1 == 0) { while(!key1); vol++; if(vol>3)vol = 3; } if(key2 == 0) { while(!key2); us--; } if(key3 == 0) { while(!key3); us++; } if(key4 == 0) { while(!key4); sta++; if(sta>4) sta =0; } switch(sta) { case 0: n++; P1 = sin_tab[n]/vol; //正玄波 led_show_delay_us(us); break; case 1: n++; P1 = n/vol; led_show_delay_us(us); //锯齿波 break; case 2: for(n = 0;n<255;n++) { P1 = n/vol; led_show_delay_us(us); } //三角波 for(n = 255;n>0;n--) { P1 = n/vol; led_show_delay_us(us); } break; case 3: P1 = n/vol; led_show_delay_us(us); //方波 P1 = ~n/vol; led_show_delay_us(us); break; } } }为什么到方波时就不得了啊？会出现失真的现象啊？ 1
2014-12-18 11:56:27　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × 谢新貌该类别下有 43 个回答。邀请回答新星之火12138 该类别下有 39 个回答。邀请回答 911119qianhao 该类别下有 35 个回答。邀请回答 hgimtk 该类别下有 32 个回答。邀请回答 wang21cj 该类别下有 31 个回答。邀请回答独孤辉二该类别下有 27 个回答。邀请回答 wuli北该类别下有 25 个回答，其中被选为最佳答案 1 次。邀请回答 hy381 该类别下有 24 个回答。邀请回答周鹏生该类别下有 24 个回答。邀请回答修罗君该类别下有 24 个回答，其中被选为最佳答案 1 次。邀请回答 butterflydw 该类别下有 24 个回答。邀请回答牛牛爱吃草该类别下有 24 个回答。邀请回答 horayte 该类别下有 24 个回答，其中被选为最佳答案 1 次。邀请回答大洼球王该类别下有 23 个回答。邀请回答 32949523596693 该类别下有 23 个回答。邀请回答蔡甸一角该类别下有 23 个回答。邀请回答 hisysteeoke 该类别下有 23 个回答。邀请回答名士流该类别下有 23 个回答。邀请回答 a732538 该类别下有 22 个回答。邀请回答 testd27 该类别下有 22 个回答，其中被选为最佳答案 1 次。邀请回答举报爱的意义相关推荐 • 如何实现简易正弦信号发生器的设计？ 1504 • 如何利用stm32mini设计制作简易示波器和简易函数发生器？ 1030 • 简易函数信号发生器 7615 • 波形发生器带不动负载 2650 • 波形发生器如何正确设计？ 1945 • 如何实现波形发生器的软硬件系统设计？ 1314 • “字发生器”是什么意思？ 3311 • 波形发生器原理图 4186 • 信号发生器的基础知识介绍 3490 • 混合波形信号发生器的波形采集问题 1194