課題9波形發(fā)生器設(shè)計(jì)報(bào)告(完整版)
【正文】 eq/=10。 if(wavefreq[waveform]1) wavefreq[waveform]=10。0xf0。 else if(waveform==1) triangle_out()。 //開(kāi)定時(shí)器中斷 EX0=1。 DA_S2=0。 delay(5)。 //在第二行顯示 /*for(num=0。 //使液晶顯示點(diǎn)陣，為下面做準(zhǔn)備 write_(0x0c)。num16。 delay(5)。 lcd_ports=。 else DAdata=0x00。 if(wavecount64) wavecount=0。uchar code sine_tab[256]={ 0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc, 0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec, 0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef, 0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2, 0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99 ,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80, 0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43, 0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16 ,0x15,0x13, 0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02 ,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10, 0x11,0x13,0x15 ,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d, 0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80}。uchar idata lcd_hang2[16]={f= Hz }。抽點(diǎn)39。這就要求我們對(duì)硬件系統(tǒng)中各組件部分有充分透徹的理解和研究，并能對(duì)之靈活應(yīng)用。 if(wavecount64) wavecount=0。 //關(guān)閉8位輸入寄存器}按K1鍵選擇出波形（方波），可按K2來(lái)加頻率，K3減頻率了來(lái)調(diào)節(jié)波的形狀，按K4則是復(fù)位。K1控制各種波形改變，實(shí)現(xiàn)一個(gè)按鍵多種波形。先利用采樣定理對(duì)各波形進(jìn)行抽樣，然后把各采樣值進(jìn)行編碼，的到的數(shù)字量存入各個(gè)波形表，執(zhí)行程序時(shí)通過(guò)查表方法依次取出，經(jīng)過(guò)D/A轉(zhuǎn)換后輸出就可以得到波形。IOUT1：電流輸出端1，其值隨DAC寄存器的內(nèi)容線(xiàn)性變化；IOUT2：電流輸出端2，其值與IOUT1值之和為一常數(shù)；Rfb：反饋信號(hào)輸入線(xiàn)，改變Rfb端外接電阻值可調(diào)整轉(zhuǎn)換滿(mǎn)量程精度；Vcc：電源輸入端，Vcc的范圍為+5V～+15V；VREF：基準(zhǔn)電壓輸入線(xiàn)，VREF的范圍為10V～+10V；AGND：模擬信號(hào)地DGND：數(shù)字信號(hào)地D、 DAC0832的工作方式：根據(jù)對(duì)DAC0832的數(shù)據(jù)鎖存器和DAC寄存器的不同的控制方式，DAC0832有三種工作方式：直通方式、單緩沖方式和雙緩沖方式4．D/A電路 功能：將波形樣值的編碼轉(zhuǎn)換成模擬值，完成雙極性的波形輸出。 2．74LS22兩個(gè)與門(mén)對(duì)控制鍵進(jìn)行兩次與通過(guò)控制一次可以實(shí)現(xiàn)一次改變波形3. DAC0832芯片進(jìn)簡(jiǎn)述： A、DAC0832是8分辨率的D/A轉(zhuǎn)換集成芯片?！钇渌δ?。2）設(shè)計(jì)一個(gè)功能鍵，用于切換輸出波形的類(lèi)型，并用虛擬示波器顯示輸出波形?！秵纹瑱C(jī)原理及接口技術(shù)》課程設(shè)計(jì)報(bào)告 課題名稱(chēng)課題9波形發(fā)生器學(xué)院自動(dòng)控制與機(jī)械工程學(xué)院專(zhuān)業(yè)電氣工程專(zhuān)業(yè)班級(jí)電氣（3）班姓名學(xué)號(hào)王文武20090417123時(shí)間2011年12月27日目 錄一、內(nèi)容提要……………………………………………………………………….3(1
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