新图文基本通信协议

最新推荐文章于 2025-04-27 14:22:16 发布

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最新推荐文章于 2025-04-27 14:22:16 发布

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原文链接：http://www.cnblogs.com/chenzuoyou/p/3469000.html

本文详细介绍了针对不同通信类型的指令构造方法，包括RS232串口、网络及服务器通信方式。通过具体的代码示例展示了如何为每种通信类型生成对应的查询亮度指令，并涉及了校验和计算及字节序列组装过程。

if ( m_nComType == COMMDATA_TYPE_RS232 )
{
bybuf[nLen++] = 0x68;
bybuf[nLen++] =0x32;
bybuf[nLen++]= 0xff;
bybuf[nLen++]= 0x46;//亮度查询

bybuf[nLen++]= 0x01;

bybuf[nLen++]= 0x01;

wdCheckNum = CheckNum( bybuf , nLen );
ushort2buf( bybuf + nLen , wdCheckNum );
nLen += 2;
}
else if( m_nComType == COMMDATA_TYPE_NetWork ) 
{
 bybuf[ nLen++] =0xff; 
bybuf[ nLen++] = 0xff;
 bybuf[ nLen++ ] = 0xff;
 bybuf[ nLen ++] = 0xff;
int nPos = nLen;
 bybuf[ nLen++] = 0;//长度

 bybuf[ nLen++ ] = 0;//长度； 
bybuf[ nLen++ ] = 0;//这里应该也是长度 
bybuf[ nLen++ ] = 0;//这里应该也是长度 

int nLenBegin = nLen;
 bybuf[nLen++] = 0x68; 
bybuf[nLen++] =0x32;
 bybuf[nLen++]=0xff;//控制卡ID 

 bybuf[nLen++]= 0x46;//亮度查询 

 bybuf[nLen++]= 0x01;
 bybuf[nLen++]= 0x01;
 wdCheckNum = CheckNum( bybuf +nLenBegin , nLen - nLenBegin );
 ushort2buf( bybuf + nLen , wdCheckNum ); 
nLen += 2;
 ushort2buf( bybuf + nPos , nLen - nLenBegin );
}

else if(m_nComType == COMMDATA_TYPE_LMSERVER)

{

int nLen = 0;
byBuf[ nLen++ ] =0x00;//长度，低字节在前；len(2bytes)+DeviceID(6bytes)+原協議包. len包括“DeviceID(6bytes)+原協議包”的長度,低位在前，

byBuf[ nLen++] = 0x00;//长度；高字节在后
memset( &byBuf[ nLen ] , 0x01, 6 ); //服务器ID，我随便填的
nLen +=6;
int nLenPos = nLen;
//byBuf[ nLen ++] = 0xa5;//开始码
byBuf[ nLen ++] = 0x68;//包类型
byBuf[ nLen ++] = 0x32;//卡类型
byBuf[ nLen ++] = atoi( pPSign->GetID() );//卡ID
byBuf[ nLen ++] = 0x46;//命令码(CMD)
byBuf[ nLen ++] = 0x01;//返回标记

byBuf[ nLen ++] = 0x00;//设置亮度信息
int i = m_Arraylight->GetAt( 1 );
memset( &byBuf[nLen] , m_Arraylight->GetAt( 1 ) , 24 );
nLen +=24;
unsigned short unCheck = 0;
for ( int i = nLenPos ; i < nLen ; i ++ )
unCheck += byBuf[i];

byBuf[ nLen++ ] = (BYTE)unCheck;
byBuf[ nLen++ ] = unCheck>>8;
byBuf[ 0 ] = (BYTE)( nLen -2 );
byBuf[ 1 ] =(BYTE)( ( nLen -2 )>>8);
return nLen;

转载于:https://www.cnblogs.com/chenzuoyou/p/3469000.html