1、程序功能通過用DAC0832產(chǎn)生三角波。（DAC0832的數(shù)字信號(hào)輸入端接P0口，/CS接P27，/XFER接地，/WR1、/WR2接單片機(jī)的/WR，ILE接電源5V。）DA0832IFORI255I0IFORI0IINCLUDE/存放絕對(duì)地址宏定義的函數(shù)原型INCLUDEDEFINEUCHARUNSIGNEDCHARDEFINEUINTUNSIGNEDINTDEFINEDA0832XBYTE0X7FFFVOIDDELAY_1MSTH10XFCTL10X18TR11WHILETF1/等待1MS定時(shí)時(shí)間到TF10VOIDMAINUCHARITMOD0X10WHILE1FORI0I0IDA0832I/D/A轉(zhuǎn)換輸出DELAY_1MS2、程序功能通過DAC0832產(chǎn)生鋸齒波。（DAC0832的數(shù)字信號(hào)輸入端接P0口，/CS接P27，/XFER接地，/WR1、/WR2接單片機(jī)的/WR，ILE接電源5V。）選擇項(xiàng)DELAY_1MSDA0832IFORI0I源程序INCLUDE/存放絕對(duì)地址宏定義的函數(shù)原型INCLUDEDEFINEUCHARUNSIGNEDCHARDEFINEUINTUNSIGNEDINTDEFINEDA0832XBYTE0X7FFFVOIDDELAY_1MSTH10XFCTL10X18TR11WHILETF1TF10VOIDMAINUCHARITMOD0X10WHILE1FORI0I23IFTIME159IFTIME059P0DISPCODETIMEI/10P0DISPCODETIMEI10FORI0I0KVOIDDISPLAYVOID/顯示函數(shù)UCHARI,KK0X01/設(shè)置位選線初值FORI0I59/秒是否超過59TIME00/秒清0TIME1/分加1IFTIME159/分是否超過59TIME10/分清0TIME2/小時(shí)加1IFTIME223/小時(shí)是否超過23TIME20/小時(shí)清0VOIDMAIN（）/主函數(shù)UCHARIWHILE1/無(wú)限循環(huán)FORI0I3I0DELAY10/一曲結(jié)束，重新開始播放VOIDTIMEINTERRUPT3/T1中斷服務(wù)程序TH1TH/定時(shí)器重置初值（高位）TL1TL/定時(shí)器重置初值（低位）P1_3P1_3/輸出取反5、程序功能設(shè)置八個(gè)電子琴鍵（從P1口接入），能夠通過按鍵發(fā)出相應(yīng)的聲音（彈奏）。利用單片機(jī)的定時(shí)器T0實(shí)現(xiàn)聲音頻率的產(chǎn)生（P33引腳接蜂鳴器）。選擇項(xiàng)CASE0X7FCASE0XFESWITCHIWHILE1TCON0X10TMOD0X01MAINP3_3P3_3VOIDINTTOINTERRUPT1SBITP3_3P33源程序INCLUDE“REG52H“/頭文件SBITP3_3P33/定義蜂鳴器輸出引腳UNSIGNEDCHARIDATAI,TL0_TEMP0,TH0_TEMP0/定義全局變量VOIDINTTOINTERRUPT1/T0服務(wù)程序TH0TH0_TEMP/定時(shí)器重置初值（高位）TL0TL0_TEMP/定時(shí)器重置初值（低位）P3_3P3_3/輸出取反MAIN/主函數(shù)P10XFF/端口初始化TMOD0X01/定時(shí)器工作方式設(shè)置ET01/T0中斷允許設(shè)置EA1/中斷總允許設(shè)置TH00/定時(shí)初值高位設(shè)置TL00/定時(shí)初值低位設(shè)置TCON0X10/定時(shí)器啟動(dòng)設(shè)置WHILE1/無(wú)限循環(huán)IP1/讀端口值SWITCHICASE0XFFTR00BREAK/無(wú)鍵按下CASE0XFETH0_TEMP0XFCTL0_TEMP0X43TR01BREAK/1鍵按下CASE0XFDTH0_TEMP0XFCTL0_TEMP0XABTR01BREAK/2鍵按下CASE0XFBTH0_TEMP0XFDTL0_TEMP0X08TR01BREAK/3鍵按下CASE0XF7TH0_TEMP0XFDTL0_TEMP0X32TR01BREAK/4鍵按下CASE0XEFTH0_TEMP0XFDTL0_TEMP0X81TR01BREAK/5鍵按下CASE0XDFTH0_TEMP0XFDTL0_TEMP0XC7TR01BREAK/6鍵按下CASE0XBFTH0_TEMP0XFETL0_TEMP0X05TR01BREAK/7鍵按下CASE0X7FTH0_TEMP0XFETL0_TEMP0X21TR01BREAK/8鍵按下DEFAULTTR00BREAK/多鍵按下6、程序功能單片機(jī)控制兩個(gè)共陽(yáng)數(shù)碼管實(shí)現(xiàn)計(jì)數(shù)顯示（P0口接段碼，P20口接十位數(shù)碼管的位碼，P21口接個(gè)位數(shù)碼管的位碼）。外中斷0每觸發(fā)一次，計(jì)數(shù)值加1；外中斷1每觸發(fā)一次，計(jì)數(shù)值減1。選擇項(xiàng)IFA99VOIDINT0VOIDINTERRUPT0DIAPLAYA/10A10P20X02P20X01VOIDDIAPLAYVOID源程序INCLUDE/頭文件UNSIGNEDCHARTABLE100XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90/定義共陽(yáng)數(shù)碼管09顯示碼數(shù)組UNSIGNEDCHARDATA_L,DATA_H/定義全局變量顯示個(gè)位、十位CHARA0/定義全局變量計(jì)數(shù)初值VOIDDELAYUNSIGNEDCHARK/延時(shí)函數(shù)UNSIGNEDCHARM,NFORM0M99A0/計(jì)數(shù)值過大，清零ELSEA/計(jì)數(shù)值加1VOIDINT1VOIDINTERRUPT2/外部中斷1函數(shù)IFAUNSIGNEDCHARAUNSIGNEDCHARM,NIE0X85TCON0X05WHILE1P0AVOIDINT0VOIDINTERRUPT0VOIDINT1VOIDINTERRUPT2A_CROR_A,1源程序INCLUDE/頭文件INCLUDE/包含循環(huán)移位函數(shù)的頭文件UNSIGNEDCHARA/定義全局變量VOIDDELAYUNSIGNEDCHARK/延時(shí)函數(shù)UNSIGNEDCHARM,NFORM0M/頭文件UNSIGNEDCHARMOTO_PAI80XF1,0XF3,0XF2,0XF6,0XF4,0XFC,0XF8,0XF9/單雙相正轉(zhuǎn)UNSIGNEDCHARPAI_NUM/狀態(tài)號(hào)SBITCFP30/開關(guān)設(shè)置VOIDTIMERVOIDINTERRUPT1USING1/T0中斷服務(wù)程序TH06553660000/256/定時(shí)器重置初值（高位）TL06553660000256/定時(shí)器重置初值（低位）IFCF0/開關(guān)閉合PAI_NUM/狀態(tài)號(hào)加1IFPAI_NUM8PAI_NUM0/若狀態(tài)號(hào)過大，回零ELSE/開關(guān)斷開IFPAI_NUM0I源程序INCLUDE/頭文件DEFINEUCHARUNSIGNEDCHARUCHARCODETAB10X01,0X02,0X04,0X08/單相正轉(zhuǎn)加電代碼UCHARCODETAB20X03,0X06,0X0C,0X09/雙相正轉(zhuǎn)電代碼UCHARCODETAB30X01,0X03,0X02,0X06,0X04,0X0C,0X08,0X09/單雙相正轉(zhuǎn)VOIDDELAY/延時(shí)函數(shù)LONGIFORI0I0IP2TAB1IDELAYBREAK/單步4拍反走CA