【正文】 A,28H CLR C CJNE A,0AH,FUN01 FUN01: JC FUN01OUT MOV 28H,00H FUN01OUT: MOV A,29H XRL A,01H JNZ F01OUT MOV 28H,00H AJMP F001OUT F01OUT: MOV A,28H XRL A,08H JZ F001OUT MOV A,28H XRL A,09H JZ F001OUT MOV 28H,08H F001OUT: LCALL DISPUPDAT RET 。02號(hào)鍵功能程序KEYFUN02: INC 27H MOV A,27H 。 CJNE A,0AH,FUN02 FUN02: JC FUN02OUT MOV 27H,00H FUN02OUT: LCALL DISPUPDAT RET 。 MOV A,26H 。 CJNE A,0AH,FUN03 FUN03: JC FUN03OUT MOV 26H,00H FUN03OUT: LCALL DISPUPDAT RET 。04號(hào)鍵功能程序KEYFUN04: MOV 29H,01H MOV 28H,00H MOV 27H,09H MOV 26H,00H LCALL DISPUPDAT RET。05號(hào)鍵功能程序KEYFUN05: MOV 29H,01H 。 RET。06號(hào)鍵功能程序KEYFUN06: MOV 29H,01H MOV 28H,00H MOV 27H,05H MOV 26H,00H LCALL DISPUPDAT RET。07號(hào)鍵功能程序KEYFUN07: MOV 29H,01H MOV 28H,00H MOV 27H,00H MOV 26H,00H LCALL DISPUPDAT RET。08號(hào)鍵功能程序KEYFUN08: MOV 29H,00H MOV 28H,09H MOV 27H,08H MOV 26H,00H LCALL DISPUPDAT RET。09號(hào)鍵功能程序KEYFUN09: MOV 29H,00H MOV 28H,09H MOV 27H,06H MOV 26H,00H LCALL DISPUPDAT RET。10號(hào)鍵功能程序KEYFUN10: MOV 29H,00H MOV 28H,09H MOV 27H,04H MOV 26H,00H LCALL DISPUPDAT 。11號(hào)鍵功能程序KEYFUN11: MOV 29H,00H MOV 28H,09H MOV 27H,02H MOV 26H,00H LCALL DISPUPDAT RET。12號(hào)鍵功能程序KEYFUN12: MOV 29H,00H MOV 28H,09H MOV 27H,00H MOV 26H,00H LCALL DISPUPDAT RET。13號(hào)鍵功能程序KEYFUN13: MOV 29H,00H MOV 28H,08H MOV 27H,08H MOV 26H,00H LCALL DISPUPDAT RET。14號(hào)鍵功能程序 KEYFUN14: MOV 29H,00H MOV 28H,08H MOV 27H,07H MOV 26H,08H LCALL DISPUPDAT RET。15號(hào)鍵功能程序KEYFUN15: CPL 03H JNB 03H,MONO CLR LCALL PUTBIT RET MONO: SETB LCALL PUTBIT RET 。 將BCD碼轉(zhuǎn)為十六進(jìn)制數(shù)，與5位控制碼合成操作碼，寫入控制芯片DISPUPDAT: LCALL BCDB LCALL CONCOMMAND LCALL PUTBIT RET 。 將BCD碼轉(zhuǎn)為十六進(jìn)制數(shù)程序BCDB: MOV CONBITL,00H 。 控制字清0 MOV CONBITL,26H MOV A,27H 。 LCALL MULLOOP 。十位數(shù)乘100操作 MOV B,100 LCALL MULLOOP 。 JNZ ADD3E8 RET 。清進(jìn)位檔標(biāo)志 MOV A,0E8H 。累加 MOV CONBITL,A 。 高8位加法 ADDC A,CONBITH 。放回CONBITH RET 。乘法 CLR C 。積低8位與CONBITL相加 MOV CONBITL,A 。 ADDC A,B MOV CONBITH,A 。返回。頻率控制數(shù)據(jù)與5位控制碼合成BH1415控制字CONCOMMAND: ANL CONBITH,07H ?？刂谱址湃階 ORL A,CONBITH 。放回CONBITH RET 。 顯示程序 。顯示首址 MOV R5,0FEH 。放入A MOV P2,A 。取顯示數(shù)據(jù) MOV DPTR,TAB 。查段碼 MOV P0,A 。讀入掃描字 JB ,PLAY1 。是十位,顯示小數(shù)點(diǎn)PLAY1: LCALL DL1MS 。指向下一顯示數(shù)據(jù) JNB ,ENDOUT 。不是，左移一位 MOV R5,A 。關(guān)小數(shù)點(diǎn) AJMP PLAY 。顯示結(jié)束，關(guān)顯示輸出口 MOV P0,0FFH 。返回。09共陽(yáng)段碼表TAB: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0FFH,0FFH。PUTBIT: MOV A,CONBITL 。BH1415使能（允許寫） LCALL PUT 。 高8位控制字入A LCALL PUT 。 BH1415寫禁止 CLR 。復(fù)位 RET 。發(fā)送8位控制 CLR C 。帶進(jìn)位位右移（先發(fā)低位） MOV ,C 。延時(shí)4微秒 NOP 。 NOP 。鎖存數(shù)據(jù)（上升沿時(shí)鎖存數(shù)據(jù)） NOP 。 NOP 。 CLR 。8位未發(fā)完轉(zhuǎn)PUT1再發(fā) RET 。程序結(jié)束附錄3：英文原文Modulating Direct Digital Synthesizer In the pursuit of more plex phase continuous modulation techniques, the control of the output waveform bees increasingly more difficult with analog circuitry. In these designs, using a nonlinear digital design eliminates the need for circuit board adjustments over yield and temperature. A digital design that meets these goals is a Direct Digital Synthesizer DDS. A DDS system simply takes a constant reference clock input and divides it down a to a specified output frequency digitally quantized or sampled at the reference clock frequency. This form of frequency control makes DDS systems ideal for systems that require precise frequency sweeps such as radar chirps or fast frequency hoppers. With control of the frequency output derived from