簡(jiǎn)易低頻信號(hào)源設(shè)計(jì)-資料下載頁(yè)
2025-08-16 16:01本頁(yè)面
【導(dǎo)讀】信號(hào)發(fā)生器是指產(chǎn)生所需參數(shù)的電測(cè)試信號(hào)的儀器。按信號(hào)波形可分為正弦信號(hào)，函。數(shù)信號(hào)，脈沖信號(hào)和隨機(jī)信號(hào)發(fā)生器等四大類。信號(hào)發(fā)生器又稱信號(hào)源或振蕩器。實(shí)踐和科技領(lǐng)域中有著廣泛的應(yīng)用。各種波形曲線均可以產(chǎn)生三角函數(shù)方程式來(lái)表示。夠產(chǎn)生多種波形，如三角波、鋸齒波，正弦波等。該設(shè)計(jì)方案提出的是利用單片機(jī)作為控。制器，用中斷查表法完成波形數(shù)據(jù)的輸出，再用D/A轉(zhuǎn)換器輸出規(guī)定的波形信號(hào)。號(hào)直接由單片機(jī)的端口輸出。結(jié)合功能要求情況，使用單片機(jī)作為控制器，使用DAC0832. 使能輸出頻率有較好的穩(wěn)定性，元器。件比較常見，價(jià)格低廉，電路設(shè)計(jì)方便。
【正文】 0xAA,0xA7, 0xA5,0xA3,0xA0,0x9E,0x9B,0x99,0x97,0x94, 0x92,0x8F,0x8D,0x8A,0x88,0x85,0x83,0x80, 0x7D,0x7B,0x78,0x76,0x73,0x71,0x6E,0x6C, 0x69,0x67,0x65,0x62,0x60,0x5D,0x5B,0x59, 0x56,0x54,0x52,0x4F,0x4D,0x4B,0x49,0x47, 0x45,0x43,0x41,0x3F,0x3D,0x3B,0x39,0x37, 0x35,0x34,0x32,0x30,0x2F,0x2D,0x2C,0x2A, 0x29,0x28,0x26,0x25,0x24,0x23,0x22,0x21, 0x20,0x1F,0x1E,0x1D,0x1D,0x1C,0x1C,0x1B, 0x1B,0x1A,0x1A,0x1A,0x19,0x19,0x19,0x19, 0x19,0x19,0x19,0x19,0x1A,0x1A,0x1A,0x1B, 0x1B,0x1C,0x1C,0x1D,0x1D,0x1E,0x1F,0x20, 0x21,0x22,0x23,0x24,0x25,0x26,0x28,0x29, 0x2A,0x2C,0x2D,0x2F,0x30,0x32,0x34,0x35, 簡(jiǎn)易低頻信號(hào)源的 設(shè)計(jì) 17 0x37,0x39,0x3B,0x3D,0x3F,0x41,0x43,0x45, 0x47,0x49,0x4B,0x4D,0x4F,0x52,0x54,0x56, 0x59,0x5B,0x5D,0x60,0x62,0x65,0x67,0x69, 0x6C,0x6E,0x71,0x73,0x76,0x78,0x7B,0x7D}。 // /***************************三角波數(shù)據(jù)表 ****************************/ uchar code thr_tab[256]= {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97, 0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7, 0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7, 0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, 0xBF,0xBE,0xBD,0xBC,0xBB,0xBA,0xB9,0xB8, 0xB7,0xB6,0xB5,0xB4,0xB3,0xB2,0xB1,0xB0, 0xAF,0xAE,0xAD,0xAC,0xAB,0xAA,0xA9,0xA8, 0xA7,0xA6,0xA5,0xA4,0xA3,0xA2,0xA1,0xA0, 0x9F,0x9E,0x9D,0x9C,0x9B,0x9A,0x99,0x98, 0x97,0x96,0x95,0x94,0x93,0x92,0x91,0x90, 0x8F,0x8E,0x8D,0x8C,0x8B,0x8A,0x89,0x88, 0x87,0x86,0x85,0x84,0x83,0x82,0x81,0x80, 0x7F,0x7E,0x7D,0x7C,0x7B,0x7A,0x79,0x78, 0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70, 0x6F,0x6E,0x6D,0x6C,0x6B,0x6A,0x69,0x68, 0x66,0x66,0x65,0x64,0x63,0x62,0x61,0x60, 0x5F,0x5E,0x5D,0x5C,0x5B,0x5A,0x59,0x58, 0x55,0x55,0x55,0x54,0x53,0x52,0x51,0x50, 0x4F,0x4E,0x4D,0x4C,0x4B,0x4A,0x49,0x48, 0x44,0x44,0x45,0x44,0x43,0x42,0x41,0x40, 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47, 0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F, 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57, 0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F, 0x60,0x61,0x62,0x63,0x66,0x65,0x66,0x67, 0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F, 0x70,0x71,0x72,0x73,0x77,0x75,0x76,0x77, 0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F}。 // /*******************************************************************/ uint data THHL=65535。 //T1的 16為定時(shí)器初值 uchar data keyword,n=0。 //鍵值存放，查表指針 bdata sinthr。 沈陽(yáng)工程學(xué)院課程設(shè)計(jì)（論文） 18 sbit sin_thr=sinthr^0。 //正弦波 /三角波標(biāo)志（ 1為正弦波） sbit ww=key^7。 //方波輸出口 // /******************************************* 鍵掃描子函數(shù)**********************************/ keyscan() { keyword=keyamp。0x07。 if(keyword!=0x07) { while((keyamp。0x07)!=0x07)。 switch(keyword) { case6:{if(THHL=65235)THHL=65535。else{THHL=THHL+255。}break。} case5:{if(THHL=500)THHL=0。else{THHL=THHL255。}break。} case3:{sin_thr=~sin_thr。break。} default:{break。} } } } // /******************************************** 初始化函數(shù)***********************************/ clearmen() { key=0xff,dataout=0x00。THHL=65535。 //按鍵輸入狀態(tài)，波形輸出為 0 TH1=THHL/256。TL1=THHL%256。 //裝定時(shí)初始值（ T1用） TMOD=0x11。ET1=1。TR1=1。EA=1。 //16位定時(shí)模式， T1中斷允許，開定時(shí)器， } // /******************************************** 主函數(shù)**************************************/ main() { clearmen()。 while(1) { keyscan()。 } } //********************************************T1 中斷函數(shù)*********************************/ void time_intt1(void) interrupt 3 簡(jiǎn)易低頻信號(hào)源的 設(shè)計(jì) 19 { EA=0。TR1=0。TH1=THHL/256。TL1=THHL%256。TR1=1。 if(sin_thr){dataout=sin_tab[n]。} else{dataout=thr_tab[n]。} if(n=255){n=0。}else{n++。} ww=~ww。 EA=1。 } //***************************************** 結(jié)束*****************************************、
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