📄 lpc2129-ps2keyboard.htm
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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">键盘发送到主机的数据当且仅当时钟线为高时改变。主机发送到键盘的数据在当且仅当时钟线为低时改变，应答位例外；</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo4"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>(4)</FONT><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">不管通讯的方向怎样，键盘总是产生时钟信号，如果主机要发送数据</SPAN><FONT
face=Calibri> </FONT><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">它必须首先告诉设备开始产生时钟信号。</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo4"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>(5)</FONT><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">时钟频率控制在</SPAN><SPAN
lang=EN-US><FONT face=Calibri>10 -20kHz</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">，可以是</SPAN><SPAN
lang=EN-US><FONT face=Calibri>80US</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">一个周期；</SPAN></FONT></P>
<P class=MsoNormal
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size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>(6)</FONT><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">主机发送数据给键盘时，键盘必须发送一个应答位；</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT
face=Calibri size=2> </FONT></o:p></SPAN></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l1 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"><FONT face=Calibri>2.</FONT><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">键盘到主机的通信：</SPAN></FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l4 level1 lfo5"><FONT
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>（1）</FONT><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">当键盘等待发送数据时，它首先检查时钟以确认它是否是高电平，如果不是，那么是主机抑制了通讯，设备必须缓冲任何要发送的数据，直到重新获得总线的控制权，如果时钟线是高电平，设备就可以开始传送数据；</SPAN></FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l4 level1 lfo5"><FONT
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>（2）</FONT><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">发送一个单一字节从仿真键盘到主机流程图</SPAN><SPAN
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l4 level1 lfo5"><SPAN
lang=EN-US><SPAN lang=EN-US
style="FONT-SIZE: 10.5pt; FONT-FAMILY: ''''Calibri'''',''''sans-serif'' mso-bidi-font-family: ''''Times New Roman'' mso-bidi-font-size: 11.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><v:shapetype
id=_x0000_t75 coordsize="21600,21600" o:spt="75" o:preferrelative="t"
path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"><FONT
size=2> <IMG style="WIDTH: 289px; HEIGHT: 404px" alt=""
src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806030951401.bmp"
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<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l4 level1 lfo5"><SPAN
lang=EN-US><SPAN lang=EN-US
style="FONT-SIZE: 10.5pt; FONT-FAMILY: ''''Calibri'''',''''sans-serif'' mso-bidi-font-family: ''''Times New Roman'' mso-bidi-font-size: 11.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><v:shapetype
coordsize="21600,21600" o:spt="75" o:preferrelative="t"
path="m@4@5l@4@11@9@11@9@5xe" filled="f"
stroked="f"></v:shapetype></SPAN></SPAN><FONT size=2> </FONT></P><SPAN
lang=EN-US><SPAN lang=EN-US
style="FONT-SIZE: 10.5pt; FONT-FAMILY: ''''Calibri'''',''''sans-serif'' mso-bidi-font-family: ''''Times New Roman'' mso-bidi-font-size: 11.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><v:shapetype
coordsize="21600,21600" o:spt="75" o:preferrelative="t"
path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"><SPAN lang=EN-US
style="mso-bidi-font-family: 宋体"><SPAN style="mso-list: Ignore">
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><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">发送一个单个位从仿真键盘到主机流程图</SPAN><SPAN
lang=EN-US>:</SPAN></FONT></P>
<P class=MsoListParagraph
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> <IMG alt=""
src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806030945382.bmp"
border=0></FONT></SPAN></P><SPAN lang=EN-US>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2><SPAN lang=EN-US style="mso-bidi-font-family: 宋体"><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">时序图：</SPAN></FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 54pt; TEXT-INDENT: -36pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><FONT
size=2> <IMG style="WIDTH: 441px; HEIGHT: 119px" height=30 alt=""
src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806030952533.bmp" width=174
border=0></FONT></SPAN></P><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><FONT
face=Calibri>３．</FONT>主机发送数据到</SPAN><SPAN lang=EN-US><FONT face=Calibri> PS/2
</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">设备</SPAN><SPAN
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P><SPAN lang=EN-US>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 44.25pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>(1)</FONT><SPAN
style="FONT: 7pt ''''Times New Roman''''">
</SPAN></SPAN></SPAN><SPAN lang=EN-US><FONT face=Calibri>PS/2
</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">设备总是产生时钟信号</SPAN><SPAN
lang=EN-US><FONT face=Calibri>,</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">如果主机要发送数据</SPAN><SPAN
lang=EN-US><FONT face=Calibri>,</FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">它必须首先把时钟和数据线设置为</SPAN><FONT
face=Calibri> </FONT><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">请求发送状态：</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 39pt"><FONT size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">通过下拉时钟线至少</SPAN><SPAN
lang=EN-US><FONT face=Calibri> 100 </FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">微秒来抑制通讯；</SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 39pt"><FONT size=2><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">通过下拉数据线来应用“请求发送</SPAN><FONT
face=Calibri> </FONT><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">”，然后释放时钟</SPAN><FONT
face=Calibri> </FONT><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">；</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 44.25pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
size=2><SPAN lang=EN-US
style="mso-bidi-font-family: Calibri; mso-fareast-font-family: Calibri"><SPAN
style="mso-list: Ignore"><FONT face=Calibri>(2)</FONT><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">主机往键盘发送数据流程图</SPAN><SPAN
lang=EN-US><FONT face=Calibri>:</FONT></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 44.25pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
lang=EN-US><FONT size=2><IMG style="WIDTH: 224px; HEIGHT: 384px" alt=""
src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806030955194.bmp"
border=0></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 44.25pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
lang=EN-US><FONT size=2></FONT></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 44.25pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
lang=EN-US><FONT size=2>（３）时序图：</FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt 44.25pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
lang=EN-US><FONT size=2> <IMG style="WIDTH: 480px; HEIGHT: 160px" height=224
alt="" src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806030957155.bmp" width=654
border=0></FONT></SPAN></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2> </FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2>４．从键盘读入数据：</FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2>（１）</FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2> <IMG alt="" src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806031000346.bmp"
border=0></FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><FONT
size=2>（２）<SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">键盘从主机读入一个位的数据（</SPAN><SPAN
lang=EN-US><FONT face=Calibri>8 </FONT></SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">个数据位</SPAN><FONT
face=Calibri> </FONT><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri">，检验位和停止位）</SPAN></FONT></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><FONT
size=2> <IMG alt="" src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806031002257.bmp"
border=0></FONT></SPAN></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><FONT
size=2>（３）<SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: ''''Times New Roman'' mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt">键盘往主机发送应答位</SPAN></FONT></SPAN></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: ''''Times New Roman'' mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt"><FONT
size=2> <IMG alt="" src="（原创）用周立功LPC2129模拟PS2接口键盘.files/200806031003468.bmp"
border=0></FONT></SPAN></SPAN></P>
<P class=MsoListParagraph
style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; mso-list: l0 level1 lfo1"><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri"><SPAN
style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-family: ''''Times New Roman'' mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-bidi-font-size: 11.0pt"><FONT
size=2></FONT></SPAN></SPAN> </P><SPAN lang=EN-US
style="FONT-SIZE: 18pt"><o:p></o:p></SPAN></SPAN></SPAN></SPAN>
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