单片机课程设计-波形发生器.doc

XXXXXXXXX学院机电工程系课程设计报告单片机原理及应用题目：波形发生器班级： 姓名：XXX 成绩：_课程设计报告波形发生器设计要求：设计一个可以发生锯齿波形、三角波形、正弦波形的波形发生器，可以实现动态移动显示。电气原理图：原理说明：波形发生器是一种常用的信号源，广泛地应用于电子电路、自动控制系统和教学实验等领域。其中，AT89C51单片机构成的发生器可以产生锯齿波、三角波、正弦波等多种波形，波形的周期可以用程序改变，并可根据需要选择单极性输出或双极性输出。具有线路简单、结构紧凑等优点。本设计加上控制按钮和LED显示器，则可以通过按钮设定所需要的波形频率，并在LED上显示频率、幅值电压，波形可用示波器显示。波形的产生是通过AT89C51执行某一波形发生程序，向D/A转换器的输入端按一定的规律发生数据，从而在D/A转化电路的输出端得到相应的波形。程序： ORG0000H LJMPSTART ORG0030HSTART: movr4,#0;R4=0锯齿波；R4=1三角波；R4=2正弦波 juchi: mova,#0jcnext: cjner4,#0,sanjiao movp2,alcall delayincajbp1.0,jcp11movr4,#0jcp11: jbp1.1,jcp12movr4,#1jcp12: jbp1.2,jcnextmovr4,#2sjmp jcnextsanjiao: mova,#0sjn1:cjne r4,#1,zhengxianmovp2,alcall delayincajb p1.0,sj1p11movr4,#0sj1p11: jbp1.1,sj1p12movr4,#1sj1p12: jbp1.2,sjp1movr4,#2sjp1: cjne a,#255,sjn1sjn2: cjne r4,#1,zhengxianmovp2,alcall delaydecajb p1.0,sj2p11movr4,#0sj2p11: jbp1.1,sj2p12movr4,#1sj2p12: jbp1.2,sjp2movr4,#2sjp2: cjne a,#0,sjn2sjmp sjn1 zhengxian: MOVR0,#0 zxNEXT: cjne r4,#2,juchiMOVA,R0MOVDPTR,#TABMOVC A,A+DPTRMOVP2,ALCALL DELAYINCR0jb p1.0,zxp11movr4,#0zxp11: jbp1.1,zxp12movr4,#1zxp12： jbp1.2,zxnextmovr4,#2SJMP zxNEXTDELAY: MOVR6,#2 D1: MOVR7,#20DJNZ R7,$DJNZ R6,D1RETTAB: DB 80H,83H,86H,89H,8DH,90H,93H,96H DB 99H,9CH,9FH,0A2H,0A5H,0A8H,0ABH,0AEH DB 0B1H,0B4H,0B7H,0BAH,0BCH,0BFH,0C2H,0C5H DB 0C7H,0CAH,0CCH,0CFH,0D1H, 0D4H,0D6H,0D8H DB 0DAH,0DDH,0DFH,0E1H,0E3H, 0E5H,0E7H,0E9H DB 0EAH,0ECH,0EEH,0EFH,0F1H, 0F2H,0F4H,0F5HDB 0F6H,0F7H,0F8H,0F9H,0FAH, 0FBH,0FCH,0FDHDB 0FDH,0FEH,0FFH,0FFH,0FFH, 0FFH,0FFH,0FFHDB 0FFH,0FFH,0FFH,0FFH,0FFH, 0FFH,0FEH,0FDHDB 0FDH,0FCH,0FBH,0FAH,0F9H, 0F8H,0F7H,0F6HDB 0F5H,0F4H,0F2H,0F1H,0EFH, 0EEH,0ECH,0EAHDB 0E9H,0E7H,0E5H,0E3H,0E1H, 0DEH,0DDH,0DAHDB 0D8H,0D6H,0D4H,0D1H,0CFH, 0CCH,0CAH,0C7HDB 0C5H,0C2H,0BFH,0BCH,0BAH, 0B7H,0B4H,0B1HDB 0AEH,0ABH,0A8H,0A5H,0A2H, 9FH, 9CH, 99HDB 96H, 93H, 90H, 8DH, 89H, 86H, 83H, 80HDB 80H, 7CH, 79H, 78H, 72H, 6FH, 6CH, 69HDB 66H, 63H, 60H, 5DH, 5AH, 57H, 55H, 51HDB 4EH, 4CH, 48H, 45H, 43H, 40H, 3DH, 3AHDB 38H, 35H, 33H, 30H, 2EH, 2BH, 29H, 27HDB 25H, 22H, 20H, 1EH, 1CH, 1AH, 18H, 16HDB 15H, 13H, 11H, 10H, 0EH, 0DH, 0BH, 0AHDB 09H, 08H, 07H, 06H, 05H, 04H, 03H, 02HDB 02H, 01H, 00H, 00H, 00H, 00H, 00H, 00HDB 00H, 00H, 00H, 00H, 00H, 00H, 01H, 02HDB 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09HDB 0AH, 0BH, 0DH, 0EH, 10H, 11H, 13H, 15HDB 16H, 18H, 1AH, 1CH, 1EH, 20H, 22H, 25HDB 27H, 29H, 2BH, 2EH, 30H, 33H, 35H, 38HDB 3AH,