📄 单片机c51编程几个有用的模块--祥子的天空.htm
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接收4个字节长的数据包<BR>}<BR>}<BR><BR>// 在中断外部响应时钟中断事件<BR>void
OnTimerEvent() <BR>{<BR> // do
nothing<BR>}<BR><BR>// 控制外部灯<BR>static void
TriggerLamp(BIT bEnable) <BR>{<BR> P10 =
~bEnable; // 需要反相控制<BR>}<BR><BR>//
键扫描回调函数<BR>BYTE KBScan() <BR>{<BR> BIT b;<BR> P11 =
1; // 读之前拉高引脚电平<BR> b =
P11; // 读入引脚状态<BR> return
~b; // 数据反相做扫描码<BR>}<BR><BR>//
计算校验和<BR>static BYTE CalcCheckSum(BYTE* pbyBuf, BYTE
byLen)<BR>{<BR> BYTE by, bySum = 0;<BR> for(by = 0; by
< byLen; by++)<BR> bySum +=
pbyBuf[by];<BR> return 0 – bySum;<BR>}<BR><BR>//
接收到键盘消息回调函数<BR>void onKeyPressed(BYTE byValue, BYTE
byState)<BR>{<BR> BYTE by[4];<BR> if(byState ==
0)<BR> {<BR> switch(byValue)<BR> {<BR> case
0x01:<BR> gbitLampState = ~g bitLampState; //
灯状态取反<BR> TriggerLamp(gbitLampState); //
执行控制<BR> by[0] = 0xff; //
构造数据包<BR> by[1] = 0x12;<BR> by[2] =
(BYTE)gbitLampState;<BR> by[3] = CalcCheckSum(by,
3); // 求校验和<BR> SendPackage(by, 4); //
发送数据包<BR> break;<BR> //
处理其它扫描码<BR> default:<BR> break;<BR> }<BR>}<BR><BR>//
接收到数据包回调函数<BR>void OnRecePackage(BYTE* pbyBuf, BYTE
byBufLen)<BR>{<BR> BYTE by[4];<BR> by[0] =
0xff;<BR> by[1] = 0x11;<BR> if(byBufLen != 4 ||
pbyBuf[3] != CalcCheckSum(pbyBuf,
3))<BR> {<BR> by[2] = 0;<BR> by[3] =
CalcCheckSum(by, 3);<BR> SendPackage(by, 4);
//
处理长度或校验和不正确<BR> }<BR><BR> switch(pbyBuf[1])<BR> {<BR> case
0x10:<BR> gbitLampState =
(BIT)pbyBuf[2];<BR> TriggerLamp(gbitLampState);<BR> by[2]
= 1;<BR> by[3] = CalcCheckSum(by,
3);<BR> SendPackage(by, 4); //
发送成功执行通知<BR> break;<BR><BR> default: //
不知道的命令<BR> by[2] = 0;<BR> by[3] = CalcCheckSum(by,
3);<BR> SendPackage(by, 4); //
发送没有成功执行通知<BR> break;<BR></FONT></SPAN></SPAN></DIV></SPAN></TD></TR></TBODY></TABLE>
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<TD class=content9
vAlign=center><STRONG>Re:单片机C51编程几个有用的模块<A
name=10764></A></STRONG></TD></TR>
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<DIV align=right><SPAN class=textbox-label>[ <SPAN
id=t_10764>2007-12-8 20:07:46</SPAN> | By: <SPAN
class=style3><SPAN id=n_10764>sky411615400</SPAN></SPAN>
]</SPAN></DIV></TD></TR></TBODY></TABLE>
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<TD><SPAN class=oblog_text><A
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width=48 align=absMiddle></A><SPAN
id=c_10764>非常好的东西,谢谢,希望有时候咄咄指教</SPAN>
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