利用80C51单片机和DAC0832 输出一个从0V开始逐渐升至5V再降至0V的可变...答:ORG 0000H LJMP SE13 ORG 00800H SE13:MOV SP,#53H mov p2,#0ffh MOV A,#43H MOV DPTR,#0FF20H MOVX @DPTR,A MOV 7EH,#00H MOV 7DH,#08H MOV 7CH,#03H MOV 7BH,#02H ;显示缓冲区 LO20:MOV R6,#00H LO21:MOV DPTR,#8000H MOV A,R6 MOVX @DPTR,A ;送0832转换...