📄 rs232.c
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rc_buf[loop01] = getchar();
loop01 ++;
}
//检查是否站地址,记录数据开始标志
if(begin_flag1 == 0)
{
rc_buf[loop01] = getchar();
if( rc_buf[loop01] == address() )//站地址判断
{
rc_buf[0] = rc_buf[loop01];
loop01 = 1;
begin_flag1 = 1;//指示已找到数据头
}
}//end of if(begin_flag1 == 0)
if(loop01 == 2)
{
function_code1 = rc_buf[1];
}
}//end of if(!rc_buf_empty())
if(loop01 == 7 )
{
if( ( function_code1 == 0x03 ) || (function_code1 == 0x16 ) || ( function_code1 == 0x17 )
|| (function_code1 == 0x7f ) )
data_num1 = 8; //读指令
else if(function_code1 == 0x10 )
{
data_num1 = rc_buf[6] + 9; //写指令
if( data_num1 > 40 )
end_flag1 = 1;
}
}//end of if(loop01 == 7 )
if( loop01 >= 7 && loop01 >= data_num1 )
{
end_flag1 = 1;//数据接收完,结束
}//end of if()
}//end of while( ( loop01 < 50 ) && ( !rc_buf_empty() ) && ( !end_flag1 ) )
}
//数据校验
if( end_flag1 )
{
crc_temp.add16 = CRC_16(rc_buf,data_num1 - 2);
if( (crc_temp.add8[0] == rc_buf[loop01-1] ) && ( crc_temp.add8[1] == rc_buf[loop01-2] ) )
{
data_ok1 = 1;
}
else
{
data_ok1 = 0;
//接收到一祯错误数据
//命令处理完,初始化变量和寄存器
loop01 = 0;
begin_flag1 = 0;
end_flag1 = 0;
data_num1 = 0;
function_code1 = 0;
begin_address.add16 = 0;//要求读取的寄存器起始地址
register_num.add16 = 0;//要求读取的寄存器个数
//初始化变量和寄存器完成
}
}
//命令识别和处理
if( data_ok1 )
{
if(function_code1 == 0x03)
{
pComData = &rwdata;//将指针指向电参量存储区
pOffset = 0;
begin_address.add8[0] = rc_buf[2];
begin_address.add8[1] = rc_buf[3];
register_num.add8[0] = rc_buf[4];
register_num.add8[1] = rc_buf[5];
if( !bWorkModel )
{
tran_buf_size = sizeof( rwdata );//95 + 12
rwdata.working.com_head.local_add = address();
rwdata.working.com_head.funtion_code = function_code1;
rwdata.working.com_head.reg_num = tran_buf_size - 5;
crc_temp.add16 = CRC_16( pComData , tran_buf_size - 2 );
rwdata.working.com_crc.data8[0] = crc_temp.add8[1];//交换高低字节
rwdata.working.com_crc.data8[1] = crc_temp.add8[0];
}
else
{
tran_buf_size = sizeof( struct adjust_datar );//41
pComData = pComData + sizeof( struct adjust_dataw );//
rwdata.adjusting.read_data.com_head.local_add = address();
rwdata.adjusting.read_data.com_head.funtion_code = function_code1;
rwdata.adjusting.read_data.com_head.reg_num = tran_buf_size - 5;
crc_temp.add16 = CRC_16( pComData , tran_buf_size - 2 );
rwdata.adjusting.read_data.com_crc.data8[0] = crc_temp.add8[1];//交换高低字节
rwdata.adjusting.read_data.com_crc.data8[1] = crc_temp.add8[0];
}
send_data();//send data
}//end of if(function_code1 == 0x03)
else if(function_code1 == 0x10)//收到读取的数据,将数据区更新
{
if( bWorkModel )
{//只有在校准模式下写指令才起作用
begin_address.add8[0] = rc_buf[2];
begin_address.add8[1] = rc_buf[3];
register_num.add8[0] = rc_buf[4];
register_num.add8[1] = rc_buf[5];
pOffset = 0;
for(i = 0; i < 3 ; i++)
{
crc_temp.add8[0] = rc_buf[7 + 0 + i*2 ];
crc_temp.add8[1] = rc_buf[7 + 1 + i*2 ];
if( crc_temp.add16 < 0x1000 )//4096
{
rwdata.adjusting.write_data.voltage[i].data16 = crc_temp.add16;
}
}//end of for(i)
for(i = 0; i < 3 ; i++)
{
crc_temp.add8[0] = rc_buf[7 + 0 + i*2 + 6];
crc_temp.add8[1] = rc_buf[7 + 1 + i*2 + 6];
if( crc_temp.add16 < 0x1000 )//4096
{
rwdata.adjusting.write_data.current[i].data16 = crc_temp.add16;
}
}//end of for(i)
for(i = 0; i < 3 ; i++)
{
crc_temp.add8[0] = rc_buf[7 + 0 + i*2 + 12];
crc_temp.add8[1] = rc_buf[7 + 1 + i*2 + 12];
if( crc_temp.add16 < 0x1000 )//4096
{
rwdata.adjusting.write_data.watt[i].data16 = crc_temp.add16;
}
}//end of for(i)
for(i = 0; i < 3 ; i++)
{
crc_temp.add8[0] = rc_buf[7 + 0 + i*2 + 18];
crc_temp.add8[1] = rc_buf[7 + 1 + i*2 + 18];
if( crc_temp.add16 < 0x1000 )//4096
{
rwdata.adjusting.write_data.var[i].data16 = crc_temp.add16;
}
}//end of for(i)
for(i = 0; i < 3 ; i++)
{
crc_temp.add8[0] = rc_buf[7 + 0 + i*2 + 24];
crc_temp.add8[1] = rc_buf[7 + 1 + i*2 + 24];
if( crc_temp.add16 < 0x1000 )//4096
{
rwdata.adjusting.write_data.va[i].data16 = crc_temp.add16;
}
}//end of for(i)
////////////////////////////////////////////
write_to7758();
save_set_to_e2prom();//
////////////////////////////////////////////
rc_buf[0] = address();
rc_buf[1] = function_code1;
rc_buf[2] = begin_address.add8[0];
rc_buf[3] = begin_address.add8[1];
rc_buf[4] = register_num.add8[0];
rc_buf[5] = register_num.add8[1];
crc_temp.add16 = CRC_16(rc_buf,6);
rc_buf[6] = crc_temp.add8[0];
rc_buf[7] = crc_temp.add8[1];
pComData = rc_buf;
tran_buf_size = 8;
send_data();
}//end of if()
//bit_write_order = 0;
}//end of else if(function_code1 == 0x10)
else if(function_code1 == 0x16)//保存电参量校准参数
{
save_set_to_e2prom();
//将收到的数据发回给上位机
pComData = rc_buf;
tran_buf_size = 8;
pOffset = 0;
send_data();
}//end of else if()
else if(function_code1 == 0x17)//清除历史电参量
{
clean_energy();
//将收到的数据发回给上位机
pOffset = 0;
pComData = rc_buf;
tran_buf_size = 8;
send_data();
}//end of else if()
else if( function_code1 == 0x7f )//地址探测指令,收到后什么也不做，只将原数据帧返回给上位机
{
pComData = rc_buf;
tran_buf_size = 8;
pOffset = 0;
send_data();
}//end of else if( function_code1 == 0x7f )
data_ok1 = 0;
//命令处理完,初始化变量和寄存器
loop01 = 0;
begin_flag1 = 0;
end_flag1 = 0;
data_num1 = 0;
function_code1 = 0;
begin_address.add16 = 0;//要求读取的寄存器起始地址
register_num.add16 = 0;//要求读取的寄存器个数
//初始化变量和寄存器完成
}//end of if(data_ok1)
}
/***************************************************************************************************
CRC校验码计算程序
注：在此改为BCH校验码计算（各数据相异或，结果存入低字节，高字节补零）
****************************************************************************************************/
/*
unsigned int BCH_16(unsigned char * p,unsigned char len)
{
unsigned char i = 0;
unsigned char nResult_temp = 0;
unsigned int nResult = 0;
nResult_temp = *(p + i);
i = 1;
while( i < len)
{
nResult_temp = nResult_temp ^ *(p + i);
i++;
}//end of while( i < len)
nResult = (int)nResult_temp & 0x00ff;
return nResult;
}
*/
unsigned int CRC_16(unsigned char * p,unsigned char len)
{
unsigned char i = 0;
unsigned char j = 0;
unsigned char c;
unsigned int nResult=0xFFFF;
unsigned int b=0xA001;
//unsigned int nCount=0;
EA = 0;
for( i = 0; i < len; i++ )
{
c=p[i];
nResult=nResult^c;
for( j=0; j<8; j++ )
{
if( nResult & 0x0001 )
{
nResult = nResult >> 1;
nResult = nResult ^ b;
}
else
{
nResult = nResult >> 1;
}
}
}
EA = 1;
return nResult;
}
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