基于單片機(jī)的信號產(chǎn)生電路的設(shè)計(jì)(文件)
【正文】 下時(shí)，函數(shù)發(fā)生器就輸出正弦波；當(dāng)按鍵4按下時(shí)，函數(shù)發(fā)生器就輸出方波。2 三角波程序流程圖如圖43所示。4 方波程序流程圖如圖45所示。除了語法差錯(cuò)和邏輯差錯(cuò)外，當(dāng)確認(rèn)程序沒問題時(shí)，通過直接加載到protues軟件電路中進(jìn)行仿真。仿真圖如圖52所示。仿真圖如圖54所示。對于上述問題的解決辦法是：改變仿真電路的參數(shù)或著換用版本較高的仿真軟件。當(dāng)仿真時(shí)，由于存在一定的系統(tǒng)誤差，波形效果不是很好。波形圖如圖56所示。波形圖如圖58所示。但是基本上是符合設(shè)計(jì)要求的。總結(jié)論文首先簡要信號發(fā)生器現(xiàn)狀、單片機(jī)，分析了信號發(fā)生器實(shí)現(xiàn)技術(shù)，包括Proteus軟件仿真技術(shù)。在將電路和實(shí)物連接的情況下再將程序下載至單片機(jī)中進(jìn)行實(shí)際電路的測試時(shí)，電路輸出的四種波形基本上都可以看到，其中鋸齒波、三角波以及正弦波的輸出誤差較大，方波波形較為理想。還可以從多個(gè)方面進(jìn)一步完善。她平日里工作繁多，但在我做畢業(yè)設(shè)計(jì)的每個(gè)階段，從實(shí)習(xí)到查閱資料，設(shè)計(jì)草案的確定和修改，中期檢查，后期詳細(xì)設(shè)計(jì)等整個(gè)過程中都給予了我悉心的指導(dǎo)。此次畢業(yè)設(shè)計(jì)才會順利完成。 ORG 0000H LJMP MAIN ORG 0030HMAIN:MOV SP,50HMOV DPTR,7FFFHMOV P2,00HMOV A,00HMOVX DPTR,ASCAN_KEY1:MOV A,P1 ANL A,0FH CJNE A,0EH,SCAN_KEY2 LJMP B1SCAN_KEY2:MOV A,P1 ANl A,0FH CJNE A,0DH,SCAN_KEY3 LJMP B2SCAN_KEY3:MOV A,P1 ANl A,0FH CJNE A,0BH,SCAN_KEY4 LJMP B3SCAN_KEY4:MOV A,P1 ANl A,0FH CJNE A,07H,SCAN_KEY1 LJMP B4。B2: CLR SETB SETB SETB UP: MOV A,00HUP1: INC A MOV P2,A NOP NOP CJNE A,0F0H,UP1DOWN:DEC A MOV P2,A NOP NOP CJNE A,00H,DOWN LJMP SCAN_KEY2。在表格里取數(shù)送到指定地址///////////////////// LOOP1:CLR SETB SETB SETB MOV A,R1 MOV DPTR,SETTAB MOVC A,A+DPTR MOV DPTR,4000H MOVX DPTR,A MOV P2,A INC R1。B4: CLR SETB SETB SETB MOV A,0FFH MOV P2,A LCALL DELY MOV A,00H MOV P2,A LCALL DELY LJMP SCAN_KEY4DELY:MOV R6,10H MOV R7,0EDH NOPDL1:DJNZ R7,DL1DL2:DJNZ R6,DL2 RETEND。正弦表格///////////////////////////////////// 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,0F5H DB 0F6H,0F7H,0F8H,0F9H,0FAH, 0FBH,0FCH,0FDH DB 0FDH,0FEH,0FFH,0FFH,0FFH, 0FFH,0FFH,0FFH DB 0FFH,0FFH,0FFH,0FFH,0FFH, 0FFH,0FEH,0FDH DB 0FDH,0FCH,0FBH,0FAH,0F9H, 0F8H,0F7H,0F6H DB 0F5H,0F4H,0F2H,0F1H,0EFH, 0EEH,0ECH,0EAH DB 0E9H,0E7H,0E5H,0E3H,0E1H, 0DEH,0DDH,0DAH DB 0D8H,0D6H,0D4H,0D1H,0CFH, 0CCH,0CAH,0C7H DB 0C5H,0C2H,0BFH,0BCH,0BAH, 0B7H,0B4H,0B1H DB 0AEH,0ABH,0A8H,0A5H,0A2H, 9FH, 9CH, 99H DB 96H, 93H, 90H, 8DH, 89H, 86H, 83H, 80H DB 80H, 7CH, 79H, 78H, 72H, 6FH, 6CH, 69H DB 66H, 63H, 60H, 5DH, 5AH, 57H, 55H, 51H DB 4EH, 4CH, 48H, 45H, 43H, 40H, 3DH, 3AH DB 38H, 35H, 33H, 30H, 2EH, 2BH, 29H, 27H DB 25H, 22H, 20H, 1EH, 1CH, 1AH, 18H, 16H DB 15H, 13H, 11H, 10H, 0EH, 0DH, 0BH, 0AH DB 09H, 08H, 07H, 06H, 05H, 04H, 03H, 02H DB 02H, 01H, 00H, 00H, 00H, 00H, 00H, 00H DB 00H, 00H, 00H, 00H, 00H, 00H, 01H, 02H DB 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H DB 0AH, 0BH, 0DH, 0EH, 10H, 11H, 13H, 15H DB 16H, 18H, 1AH, 1CH, 1EH, 20H, 22H, 25H DB 27H, 29H, 2BH, 2EH, 30H, 33H, 35H, 38H DB 3AH, 3DH, 40H, 43H, 45H, 48H, 4CH, 4EH DB 51H, 55H, 57H, 5AH, 5DH, 60H, 63H, 66H DB 69H, 6CH, 6FH, 72H, 76H, 79H, 7CH, 80H LJMP SCAN_KEY3。B3: MOV R1,00H 。B1:CLR SETB SETB SETB LP: MOV A,00H MOV DPTR,4000H MOVX DPTR,A LP1: INC A MOV P2,A CJNE A,0FFH,LP1 LJMP SCAN_KEY1。按鍵KEY1:鋸齒波 按鍵KEY2:三角波 按鍵KEY3: 正弦波 。除了敬佩李老師的專業(yè)水平外，她的治學(xué)嚴(yán)謹(jǐn)
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