📄 单片机坐标简易电子琴的设计.htm
字号:
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将高位备份</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV A,22H<SPAN
style="mso-spacerun: yes">
</SPAN>;</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将</SPAN><SPAN
lang=EN-US>22H</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">里存放的按键号送给</SPAN><SPAN
lang=EN-US>A</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>RL A<SPAN
style="mso-spacerun: yes">
</SPAN>;</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">因为查表里都是字，所以得乘</SPAN><SPAN
lang=EN-US>2</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">查得数据</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>INC A<SPAN
style="mso-spacerun: yes">
</SPAN>;</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">取低位数据</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOVC A,@A+DPTR</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV TL0,A</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV 20H,A</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US>WAIT2: LCALL KEY</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>SETB EA</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>CJNE R3,#00H,WAIT1</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>JMP WAIT2</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US>KEY:<SPAN style="mso-spacerun: yes">
</SPAN>MOV R3,#00H<SPAN
style="mso-spacerun: yes">
</SPAN>; KEY</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">子程序，判断有键按下否？第几个键？</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV R1,#0FFH</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV R0,#00H</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV A,R1</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV P2,A</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV A,P2</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>CLR C</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>CPL C<SPAN
style="mso-spacerun: yes">
</SPAN>;</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">利用标志位</SPAN><SPAN
lang=EN-US>CY</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来判断是哪个键按下</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV R2,#08H</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US>WAIT3: RLC A<SPAN
style="mso-spacerun: yes">
</SPAN>;</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">移位判断</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>JNC STORE</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>INC R0<SPAN
style="mso-spacerun: yes">
</SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>DJNZ R2,WAIT3</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US>STORE: MOV 22H,R0 <SPAN
style="mso-spacerun: yes"> </SPAN>;
</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将按键号存</SPAN><SPAN
lang=EN-US>22H</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN
lang=EN-US>R3=0</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有键按下</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV R3,#00H</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>RET</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US>BREAK: PUSH ACC<SPAN
style="mso-spacerun: yes">
</SPAN>;<SPAN style="mso-spacerun: yes">
</SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中断产生方波，从</SPAN><SPAN
lang=EN-US>P1.0</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">口输出</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>PUSH PSW</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN
lang=EN-US><SPAN
style="mso-spacerun: yes">
</SPAN>MOV TL0,20H</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm⌨️ 快捷键说明
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