看妳的程序,妳的電路圖應該是這樣的吧(用P2.0做片選)
鋸齒波源程序如下:
ORG?0000HAJMP?START
ORG?0050H
START:MOV?DPTR,#0FEFFH?LP:MOV?A,#00H
LP1:MOVX?@DPTR,A
INC?A AJMP?LP1?END
三角波源程序如下:
ORG?0000HAJMP?START
ORG?0050H
START:MOV?DPTR,#0FEFFH?
TRI:MOV?A,#00H?UP:MOVX?@DPTR,A
INC?A?
CJNE?A,#0FFH,UPDOWN:?MOVX?@DPTR,A
DEC?A? CJNE?A,#00H,DOWN LJMP?UP END