📄 lpc2129-ps2keyboard.htm
字号:
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><SPAN
lang=EN-US><FONT size=2> </FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1"><FONT
size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><FONT
face=Calibri>四．</FONT>键盘初始化与</SPAN><SPAN lang=EN-US>PC</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">的数据交换</SPAN><SPAN
lang=EN-US>:</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt"><SPAN lang=EN-US><FONT
size=2>P->H: 0xAA<SPAN style="mso-spacerun: yes"> </SPAN>997757us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0xEC<SPAN
style="mso-spacerun: yes"> </SPAN>380us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xFE<SPAN
style="mso-spacerun: yes"> </SPAN>125us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0xFF<SPAN
style="mso-spacerun: yes"> </SPAN>250us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xFA<SPAN
style="mso-spacerun: yes"> </SPAN>387526us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xAA<SPAN
style="mso-spacerun: yes"> </SPAN>71us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0xF0<SPAN
style="mso-spacerun: yes"> </SPAN>398us P->H: 0xFA<SPAN
style="mso-spacerun: yes"> </SPAN>8538us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0x02<SPAN
style="mso-spacerun: yes"> </SPAN>441us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xFA<SPAN
style="mso-spacerun: yes"> </SPAN>82us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0xED 381us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xFA<SPAN
style="mso-spacerun: yes"> </SPAN>64us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0x06<SPAN
style="mso-spacerun: yes"> </SPAN>434us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xFA<SPAN
style="mso-spacerun: yes"> </SPAN>996921us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0xEC<SPAN
style="mso-spacerun: yes"> </SPAN>381us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H: 0xFE<SPAN
style="mso-spacerun: yes"> </SPAN>998176us<SPAN
style="mso-spacerun: yes"> </SPAN>H->P: 0xEC<SPAN
style="mso-spacerun: yes"> </SPAN>380us<SPAN
style="mso-spacerun: yes"> </SPAN>P->H:
0xFE</FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt"><FONT size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">以上的数据是开始此项目之前做的一个</SPAN><SPAN
lang=EN-US>PS2</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">数据监视仪获得的数据</SPAN><SPAN
lang=EN-US>.</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt"><FONT size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">分析如下</SPAN><SPAN
lang=EN-US>:</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(1)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">键盘刚接上时键盘必须发送</SPAN><SPAN
lang=EN-US>0xAA</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">给主机</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">告诉主机它已经准备好可以工作了</SPAN><SPAN
lang=EN-US>;</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(2)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机发送</SPAN><SPAN
lang=EN-US>0XEC</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">过来键盘必须回</SPAN><SPAN
lang=EN-US>0XFE;</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(3)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">除了</SPAN><SPAN
lang=EN-US>0XEC</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">外键盘每接收到主机发送过来的一个字节字符时必须回一个</SPAN><SPAN
lang=EN-US>0XFA;</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(4)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机发送</SPAN><SPAN
lang=EN-US>0XFF</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">给键盘要求其重启</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">键盘回发</SPAN><SPAN
lang=EN-US>0XFA </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">和</SPAN><SPAN
lang=EN-US> 0XAA;</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(5)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机发送</SPAN><SPAN
lang=EN-US>0XF0</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">给键盘</SPAN><SPAN
lang=EN-US>, </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机在这个命令后发送一个字节的参数是定键盘使用哪套扫描码集参数字节可以是</SPAN><SPAN
lang=EN-US>0x01 0x02 </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">或</SPAN><SPAN
lang=EN-US>0x03 </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">分别选择扫描码集第一套第二套或第三套</SPAN><SPAN
lang=EN-US>;</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(6)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机发送</SPAN><SPAN
lang=EN-US>0XED</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">给键盘</SPAN><SPAN
lang=EN-US>, </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机在本命令后跟随一个参数字节用于指示键盘上</SPAN><SPAN
lang=EN-US>Num Lock, Caps Lock,and Scroll Lock LED </SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">的状态</SPAN><SPAN
lang=EN-US>;</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l2 level1 lfo2"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(7)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">初始化完成之后</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">如果键盘没有往主机发送数据</SPAN><SPAN
lang=EN-US>(</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">没有按按键</SPAN><SPAN
lang=EN-US>),</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机会每隔一段时间就往键盘发送</SPAN><SPAN
lang=EN-US>OXEC,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">确定键盘是否还处于工作状态</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">如果大约</SPAN><SPAN
lang=EN-US>1</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">秒左右键盘没回</SPAN><SPAN
lang=EN-US>0XFE</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">的话</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">主机就会认为键盘工作不正常了</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">又会发送</SPAN><SPAN
lang=EN-US>0XFF</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">过来</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">要求键盘重启</SPAN><SPAN
lang=EN-US>.</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT
size=2> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT
size=2> </FONT></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1"><FONT
size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">五．实现的总体思路</SPAN><SPAN
lang=EN-US>:</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo3"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(1)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">因为主机要往键盘发送数据时必须先把时钟线拉低</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">所以只要不是键盘把时钟线拉低的话就产生中断</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">进而判断主机是要发送数据给键盘还是要抑制键盘往主机发送数据</SPAN><SPAN
lang=EN-US>.</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo3"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore">(2)<SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">那么怎么判断主是要准备发送数据还是要抑制键盘数据的发送呢</SPAN><SPAN
lang=EN-US>?</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">我的方法是这样的</SPAN><SPAN
lang=EN-US>:</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">时钟线被拉低后进入中断</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">等待时钟线高电平的到来</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">时钟线高电平到来时</SPAN><SPAN
lang=EN-US>,</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">如果数据线为高的话就是主机抑制键盘往主机发送数据</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">如果数据线电平为低就是主机是要往键盘发送数据了</SPAN><SPAN
lang=EN-US>.</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">这是</SPAN><SPAN
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -