51单片机信号发生器单缓冲的，想改成双缓冲代码和原来图都在资料里了 -

标题: 51单片机信号发生器单缓冲的，想改成双缓冲代码和原来图都在资料里了 [打印本页]

作者: brant965 时间: 2020-6-23 14:02
标题: 51单片机信号发生器单缓冲的，想改成双缓冲代码和原来图都在资料里了
这是单缓冲的，想改成双缓冲，但是改了好多次都不行，就是两个函数可以分别在两个示波器上，求大家帮忙看看！谢谢大家啦！

单片机源程序如下:
ORG    0000H       ;程序开始
   MOV    DPTR,#0FEFFH ;0832的地址
   MOV    SP,#60H    ;设置堆栈

START:
   JNB    P1.1,SJB    ;输出三角波程序
         JNB    P1.4,ZXB    ;输出正弦波程序
         SJMP START       ;循环检测开关情况
         RET
         /**************三角波************/
SJB: MOV    R6,#00H    ;给R6初值
DA1: MOV    A,R6       ;R6送A
   MOVX    @DPTR,A    ;初值给地址
         INC    R6       ;R6的内容既初值+1
         CJNE    R6,#0FFH,DA1;初值到最大
DA2: DEC    R6       ;R6内容既初值-1
   MOV    A,R6       ;R6送A
   MOVX    @DPTR,A    ;初值给地址
   CJNE    R6,#00H,DA2 ;初值到最小
   JB    P1.1,START  ;开关断开了既退出
   AJMP    SJB       ;跳转到SJB处

/*************正弦波************/
ZXB: MOV    R1,#00H    ;取表格初值
LOOP1: MOV    A,R1       ;在表格里取数送到指定地址
   MOV    DPTR,#TAB ;把DPTR指针指向表格TAB的所在的地址。
         MOVC    A,@A+DPTR ;将DPTR的地址加上累加器A存的偏移量，形成的新地址中的数取出给A
         MOV    DPTR,#0FEFFH;建立数据指针地址为0FEFFH
         MOVX    @DPTR,A    ;传送数据时先把地址给DPTR，然后用MOVX指令把累加器A的内容传送给@DPTR
         INC    R1       ;加一
         JB       P1.4,START  ;开关断开了既退出
         AJMP    LOOP1    ;循环
TAB: DB 080H,083H,086H,089H,08DH,090H,093H,096H
         DB 099H,09CH,09FH,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
         RET
         END

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