（十万火急！）全部家当求购串口读写程序(so easy!come in!)(200分)

用WINAPI实现C中inportb(),outportb()功能，
最好是在Builder环境中实现。
要求：
1200Baud/s,8个数据位，一个停止位，无校验位。

Builder支持内嵌汇编,直接用In, Out指令，效率极高

不行的，我试过这种方法。
由于WINDOWS中系统全面接管了对硬件的管理，
为了实现资源共享，系统是不允许直接对硬件操作
尤其是调用中断。这样会破坏系统的多任务性。
读到的数据根本就不稳定。
下面是我实验过的程序，在DOS状态下可成功读数，
但WINDOWS下读到的数据不正确！
//---------------------------------------------------------------
//读端口
unsigned char inportb(unsigned short Addr)
{
unsigned char rv;
asm {
mov AX,Addr
mov DX,AX
in AL,DX
mov rv,AL
}
return rv;
}
}
//--------------------------------------------------------------------
//写端口
void outportb(unsigned short Addr, unsigned char Value)
{
asm {
mov AX,Addr
xor DX,DX
mov DL,Value
xchg AX,DX
out DX,AL
}
}
//----------------------------------------------------------------
//主程序
.....
//从指定端口读入一个数据,value为返回值,pbFlag标志读数是否成功
unsigned char __fastcall receive(bool *pbFlag)
{
bioscom(0,(SeriesPort-1));
time_t OldSec,CurSec;
OldSec=time(NULL);
unsigned char cValue;
do
{
CurSec=time(NULL);
if((CurSec-OldSec)>16) //超时(16妙)
{
*pbFlag=false;
//失败
return (unsigned char)255;
}
cValue=inportb((unsigned short int)(ComPort+5));
//读端口标志位
}while(!(cValue&0x01));
cValue=inportb(ComPort);

*pbFlag=true;
//成功
return cValue;
}
......

我一下子给你发了两个过来,请查收.

借花献佛!!!
文章如下:

用Builder C++如何对串行口COM1或COM2进行读写操作

一个通讯类（对串口的读写），可以不用做修改就用在程序中
TSerialPort.h
#ifndef __SERIALPORT_H__
#define __SERIALPORT_H__
#define WM_COMM_BREAK_DETECTED WM_USER+1 // A break was detected on input.
#define WM_COMM_CTS_DETECTED WM_USER+2 // The CTS (clear-to-sennd) sig
nal changed state.
#define WM_COMM_DSR_DETECTED WM_USER+3 // The DSR (data-set-reaady) si
gnal changed state.
#define WM_COMM_ERR_DETECTED WM_USER+4 // A line-status error ooccurre
d. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY.

#define WM_COMM_RING_DETECTED WM_USER+5 // A ring indicator was etec ted.
#define WM_COMM_RLSD_DETECTED WM_USER+6 // The RLSD (receive-lin
-sig
nal-detect) signal changed state.
#define WM_COMM_RXCHAR WM_USER+7 // A character w
s received and pl
aced in the input buffer.
#define WM_COMM_RXFLAG_DETECTED WM_USER+8 // The event character w
s
received and placed in the input buffer.
#define WM_COMM_TXEMPTY_DETECTED WM_USER+9 // The last character in
th
e output buffer was sent.

class TSerialPort
{
public:
// contruction and destruction
TSerialPort();

virtual ~TSerialPort();


// port initialisation
BOOL InitPort(TForm* pPortOwner, UINT portnr = 1, UINT baud =
19200,
char parity = 'N', UINT databits = 8, UINT stopsbits = 1, DWORD dwCom
mEvents = EV_RXCHAR | EV_CTS, UINT nBufferSize = 512);


// start/stop comm watching
BOOL StartMonitoring();

BOOL RestartMonitoring();

BOOL StopMonitoring();


DWORD GetWriteBufferSize();

DWORD GetCommEvents();

DCB GetDCB();


void WriteToPort(char* string);


protected:
// protected memberfunctions
void ProcessErrorMessage(char* ErrorText);

static DWORD _stdcall CommThread(LPVOID pParam);

static void ReceiveChar(TSerialPort* port, COMSTAT comstat);

static void WriteChar(TSerialPort* port);


// thread
HANDLE m_HThread;


// synchronisation objects
CRITICAL_SECTION m_csCommunicationSync;

BOOL m_bThreadAlive;


// handles
HANDLE m_hShutdownEvent;

HANDLE m_hComm;

HANDLE m_hWriteEvent;


// Event array.
// One element is used for each event. There are two event handles fo
r each port.
// A Write event and a receive character event which is located in th
e overlapped structure (m_ov.hEvent).
// There is a general shutdown when the port is closed.
HANDLE m_hEventArray[3];


// structures
OVERLAPPED m_ov;

COMMTIMEOUTS m_CommTimeouts;

DCB m_dcb;


// owner window
TForm* m_pOwner;


// misc
UINT m_nPortNr;

char* m_szWriteBuffer;

DWORD m_dwCommEvents;

DWORD m_nWriteBufferSize;

};


#endif __SERIALPORT_H__


TSerialPort.cpp

#include
#pragma hdrstop
#include "SerialPort.h"
#include
#include
#pragma package(smart_init)
//
// Constructor
//
TSerialPort::TSerialPort()
{
m_hComm = NULL;


// initialize overlapped structure members to zero
m_ov.Offset = 0;

m_ov.OffsetHigh = 0;


// create events
m_ov.hEvent = NULL;

m_hWriteEvent = NULL;

m_hShutdownEvent = NULL;


m_szWriteBuffer = NULL;


m_bThreadAlive = false;

}

//
// Delete dynamic memory
//
TSerialPort::~TSerialPort()
{
do

{
SetEvent(m_hShutdownEvent);

} while (m_bThreadAlive);


delete [] m_szWriteBuffer;

}

//
// Initialize the port. This can be port 1 to 4.
//
BOOL TSerialPort::InitPort(TForm* pPortOwner, // the owner (CWnd) of t
he port (receives message)
UINT portnr,
/ portnumber (1..4)
UINT baud,
/ baudrate
char parity,
/ parity
UINT databits,
/ databits
UINT stopbits,
/ stopbits
DWORD dwCommEvents, // EV_RX
HAR, EV_CTS etc
UINT writebuffersize)
/ size to the writebuffer
{
assert(portnr > 0 &&
portnr < 5);

assert(pPortOwner != NULL);


// if the thread is alive: Kill
if (m_bThreadAlive)
{
do

{
SetEvent(m_hShutdownEvent);

} while (m_bThreadAlive);

}

// create events
if (m_ov.hEvent != NULL)
ResetEvent(m_ov.hEvent);

m_ov.hEvent = CreateEvent(NULL, true, false, NULL);


if (m_hWriteEvent != NULL)
ResetEvent(m_hWriteEvent);

m_hWriteEvent = CreateEvent(NULL, true, false, NULL);


if (m_hShutdownEvent != NULL)
ResetEvent(m_hShutdownEvent);

m_hShutdownEvent = CreateEvent(NULL, true, false, NULL);


// initialize the event objects
m_hEventArray[0] = m_hShutdownEvent;
// highest priority
m_hEventArray[1] = m_ov.hEvent;

m_hEventArray[2] = m_hWriteEvent;


// initialize critical section
InitializeCriticalSection(&amp;m_csCommunicationSync);


// set buffersize for writing and save the owner
m_pOwner = pPortOwner;


if (m_szWriteBuffer != NULL)
delete [] m_szWriteBuffer;

m_szWriteBuffer = new char[writebuffersize];


m_nPortNr = portnr;


m_nWriteBufferSize = writebuffersize;

m_dwCommEvents = dwCommEvents;


BOOL bResult = false;

char *szPort = new char[50];

char *szBaud = new char[50];


// now it critical!
EnterCriticalSection(&amp;m_csCommunicationSync);


// if the port is already opened: close it
if (m_hComm != NULL)
{
CloseHandle(m_hComm);

m_hComm = NULL;

}

// prepare port strings
sprintf(szPort, "COM%d", portnr);

sprintf(szBaud, "baud=%d parity=%c data=%d stop=%d", baud, parity, da
tabits, stopbits);


// get a handle to the port
m_hComm = CreateFile(szPort,
/ communication port string (COMX)

GENERIC_READ | GENERIC_WRITE,
/ read/write types
0,
/ comm devices must be opened with exclusive acce
ss
ss
NULL,
/ no security attributes
OPEN_EXISTING,
/ comm devices must use OPEN_EXISTING
FILE_FLAG_OVERLAPPED,
/ Async I/O
0);

/ template must be 0 for comm devices

if (m_hComm == INVALID_HANDLE_VALUE)
{
// port not found
delete [] szPort;

delete [] szBaud;


return false;

}

// set the timeout values
m_CommTimeouts.ReadIntervalTimeout = 1000;

m_CommTimeouts.ReadTotalTimeoutMultiplier = 1000;

m_CommTimeouts.ReadTotalTimeoutConstant = 1000;

m_CommTimeouts.WriteTotalTimeoutMultiplier = 1000;

m_CommTimeouts.WriteTotalTimeoutConstant = 1000;


// configure
if (SetCommTimeouts(m_hComm, &amp;m_CommTimeouts))
{
if (SetCommMask(m_hComm, dwCommEvents))
{
if (GetCommState(m_hComm, &amp;m_dcb))
{
m_dcb.fRtsControl = RTS_CONTROL_ENABLE;

/ set RTS bit high!
if (BuildCommDCB(szBaud, &amp;m_dcb))
{
if (SetCommState(m_hComm, &amp;m_dcb))
;
// normal operation... continu

else

ProcessErrorMessage("SetCommStat
()");

}
else

ProcessErrorMessage("BuildCommDCB()");

}
else

ProcessErrorMessage("GetCommState()");

}
else

ProcessErrorMessage("SetCommMask()");

}
else

ProcessErrorMessage("SetCommTimeouts()");


delete [] szPort;

delete [] szBaud;


// flush the port
PurgeComm(m_hComm, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_RXABORT | PU
RGE_TXABORT);


// release critical section
LeaveCriticalSection(&amp;m_csCommunicationSync);


return true;

}

//
// The CommThread Function.
//
DWORD _stdcall TSerialPort::CommThread(LPVOID pParam)
{
// Cast the void pointer passed to the thread back to
// a pointer of TSerialPort class
TSerialPort *port = (TSerialPort*)pParam;


// Set the status variable in the dialog class to
// TRUE to indicate the thread is running.
port->m_bThreadAlive = true;


// Misc. variables
DWORD BytesTransfered = 0;

DWORD Event = 0;

DWORD CommEvent = 0;

DWORD dwError = 0;

COMSTAT comstat;

BOOL bResult = true;


// Clear comm buffers at startup
if (port->m_hComm) // check if the port is opened
PurgeComm(port->m_hComm, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_R
ABO
RT | PURGE_TXABORT);


// begin
forever loop. This loop will run as long as the thread is a
live.
for (;
{

// Make a call to WaitCommEvent(). This call will return immedi
tly

// because our port was created as an async port (FILE_FLAG_OVER
APP
ED
// and an m_OverlappedStructerlapped structure specified). This
cal
l will cause the
// m_OverlappedStructerlapped element m_OverlappedStruct.hEvent,
whi
ch is part of the m_hEventArray to
// be placed in a non-signeled state if there are no bytes avail
ble
to be read,
// or to a signeled state if there are bytes available. If this
eve
nt handle
// is set to the non-signeled state, it will be set to signeled
hen
a
// character arrives at the port.

// wedo
this for each port!

bResult = WaitCommEvent(port->m_hComm, &amp;Event, &amp;port->m_ov);


if (!bResult)
{
// If WaitCommEvent() returns FALSE, process the last er
or to dete
rmin
rmin
// the reason..
switch (dwError = GetLastError())
{
case ERROR_IO_PENDING:
{
// This is a normal return value if ther
are no bytes
// to read at the port.
//do
nothing and continue
break;

}
case 87:
{
// Under Windows NT, this value is retur
ed for some reason.
// I have not investigated why, but it i
also a valid reply
// Alsodo
nothing and continue.
break;

}
default:
{
// All other error codes indicate a seri
us error has
// occured. Process this error.
port->ProcessErrorMessage("WaitCommEvent
)");

break;

}
}
}
else

{
// If WaitCommEvent() returns TRUE, check to be sure the
e are
// actually bytes in the buffer to read.
//
// If you are reading more than one byte at a time from
he buffer

// (which this programdo
es notdo
) you will have the si
uation occ
ur
// where the first byte to arrive will cause the WaitFor
ultipleObj
ects()
// function to stop waiting. The WaitForMultipleObjects
) function

// resets the event handle in m_OverlappedStruct.hEvent
o the non-
signelead state
// as it returns.
//
// If in the time between the reset of this event and th
call to
// ReadFile() more bytes arrive, the m_OverlappedStruct.
Event hand
le will be set again
// to the signeled state. When the call to ReadFile() oc
urs, it wi
ll
// read all of the bytes from the buffer, and the progra
will
// loop back around to WaitCommEvent().
//
// At this point you will be in the situation where m_Ov
rlappedStr
uct.hEvent is set,
// but there are no bytes available to read. If you pro
eed and ca
ll
// ReadFile(), it will return immediatly due to the asyn
port setu
p, but
// GetOverlappedResults() will not return until the next
character
arrives.
//
// It is not desirable for the GetOverlappedResults() fu
ction to b
e in
// this state. The thread shutdown event (event 0) and
he WriteFi
le()
// event (Event2) will not work if the thread is blocked
by GetOver
lappedResults().
//
// The solution to this is to check the buffer with a ca
l to Clear
CommError().
// This call will reset the event handle, and if there a
e no bytes
to read
// we can loop back through WaitCommEvent() again, then

roceed.
// If there are really bytes to read,do
nothing and pro
eed.

bResult = ClearCommError(port->m_hComm, &amp;dwError, &amp;comst
t);


if (comstat.cbInQue == 0)
continue;

} // end if bResult

// Main wait function. This function will normally block the th
ead


// until one of nine events occur that require action.
Event = WaitForMultipleObjects(3, port->m_hEventArray, false, IN
INI
TE);


switch (Event)
{
case 0:
{
// Shutdown event. This is event zero so it wil
be
// the higest priority and be serviced first.

port->m_bThreadAlive = false;


// Kill this thread. break is not needed, but m
kes me feel bette
r.
ExitThread(100);

break;

}
case 1: // read event
{
GetCommMask(port->m_hComm, &amp;CommEvent);

if (CommEvent &amp;
EV_CTS)
::SendMessage(port->m_pOwner->Handle, WM
COMM_CTS_DETECTED, (WPAR
AM) 0, (LPARAM) port->m_nPortNr);

if (CommEvent &amp;
EV_RXFLAG)
::SendMessage(port->m_pOwner->Handle, WM
COMM_RXFLAG_DETECTED, (W
PARAM) 0, (LPARAM) port->m_nPortNr);

if (CommEvent &amp;
EV_BREAK)
::SendMessage(port->m_pOwner->Handle, WM
COMM_BREAK_DETECTED, (WP
ARAM) 0, (LPARAM) port->m_nPortNr);

if (CommEvent &amp;
EV_ERR)
::SendMessage(port->m_pOwner->Handle, WM
COMM_ERR_DETECTED, (WPAR
AM) 0, (LPARAM) port->m_nPortNr);

if (CommEvent &amp;
EV_RING)
::SendMessage(port->m_pOwner->Handle, WM
COMM_RING_DETECTED, (WPA
RAM) 0, (LPARAM) port->m_nPortNr);


if (CommEvent &amp;
EV_RXCHAR)
// Receive character event from port.
ReceiveChar(port, comstat);


break;

}
case 2: // write event
{
// Write character event from port
WriteChar(port);

break;

}

} // end switch

} // close forever loop

return 0;

}

//
//
// start comm watching
//
BOOL TSerialPort::StartMonitoring()
{
DWORD lpThreadId;

m_HThread =CreateThread(NULL,
0,
CommThread,
this,
0,
&amp;lpThreadId);

if(m_HThread==NULL)
{
ProcessErrorMessage("Create Thread Error");

return false;

}
return true;

}

//
// Restart the comm thread
//
//
BOOL TSerialPort::RestartMonitoring()
{
ResumeThread(m_HThread);

return true;

}

//
// Suspend the comm thread
//
BOOL TSerialPort::StopMonitoring()
{
SuspendThread(m_HThread);

return true;

}

//
// If there is a error, give the right message
//
void TSerialPort:rocessErrorMessage(char* ErrorText)
{
char *Temp = new char[200];



LPVOID lpMsgBuf;


FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &amp;lpMsgBuf,
0,
NULL
);


sprintf(Temp, "WARNING: %s Failed with the following error: /n%s/nPo
rt: %d/n", (char*)ErrorText, lpMsgBuf, m_nPortNr);

Application->MessageBox(Temp, "Application Error", MB_ICONSTOP);


LocalFree(lpMsgBuf);

delete[] Temp;

}

//
// Write a character.
//
void TSerialPort::WriteChar(TSerialPort* port)
{
BOOL bWrite = true;

BOOL bResult = true;


DWORD BytesSent = 0;


ResetEvent(port->m_hWriteEvent);


// Gain ownership of the critical section
EnterCriticalSection(&amp;port->m_csCommunicationSync);


if (bWrite)
{
// Initailize variables
port->m_ov.Offset = 0;

port->m_ov.OffsetHigh = 0;


// Clear buffer
PurgeComm(port->m_hComm, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_R
ABO
ABO
RT | PURGE_TXABORT);


bResult = WriteFile(port->m_hComm,
/ Handle to COMM Port
port->m_szWriteBuffer, /
/ Pointer to message buffer in call
ing finction
strlen((char*)port->m_sz
riteBuffer), // Length of message to s
end
&amp;BytesSent,
/ Where to store the number of bytes sent
&amp;port->m_ov);

/ Overlapped structure

// deal with any error codes
if (!bResult)
{
DWORD dwError = GetLastError();

switch (dwError)
{
case ERROR_IO_PENDING:
{
// continue to GetOverlappedResu
ts()
BytesSent = 0;

bWrite = false;

break;

}
default:
{
// all other error codes
port->ProcessErrorMessage("Write
ile()");

}
}
}
else

{
LeaveCriticalSection(&amp;port->m_csCommunicationSync);

}
} // end if(bWrite)

if (!bWrite)
{
bWrite = true;


bResult = GetOverlappedResult(port->m_hComm, // Handle to COM
port

&amp;port-
m_ov, // Overlapped structure
&amp;Bytes
ent, // Stores number of bytes sent
true);

// Wait flag

LeaveCriticalSection(&amp;port->m_csCommunicationSync);


// deal with the error code
if (!bResult)
{
port->ProcessErrorMessage("GetOverlappedResults() in Wri
eFile()");


}
} // end if (!bWrite)

// Verify that the data size send equals what we tried to send
if (BytesSent != strlen((char*)port->m_szWriteBuffer))
{
printf("WARNING: WriteFile() error.. Bytes Sent: %d;
Message Len
th:
%d/n", BytesSent, strlen((char*)port->m_szWriteBuffer));

}
}

//
// Character received. Inform the owner
//
void TSerialPort::ReceiveChar(TSerialPort* port, COMSTAT comstat)
{
BOOL bRead = true;

BOOL bResult = true;

DWORD dwError = 0;

DWORD BytesRead = 0;

unsigned char RXBuff;



for (;
{
// Gain ownership of the comm port critical section.
// This process guarantees no other part of this program
// is using the port object.

EnterCriticalSection(&amp;port->m_csCommunicationSync);


// ClearCommError() will update the COMSTAT structure and
// clear any other errors.

bResult = ClearCommError(port->m_hComm, &amp;dwError, &amp;comstat);


LeaveCriticalSection(&amp;port->m_csCommunicationSync);


// start forever loop. I use this type of loop because I
//do
not know at runtime how many loops this will have to
// run. My solution is to start a forever loop and to
// break out of it when I have processed all of the
// data available. Be careful with this approach and
// be sure your loop will exit.
// My reasons for this are not as clear in this sample
// as it is in my production code, but I have found this
// solutiion to be the most efficient way todo
this.

if (comstat.cbInQue == 0)
{
// break out when all bytes have been read
break;

}

EnterCriticalSection(&amp;port->m_csCommunicationSync);


if (bRead)
{
bResult = ReadFile(port->m_hComm, // Handl
to COMM port
&amp;RXBuff,
/ RX Buffer Pointer
1,
/ Read one byte
&amp;BytesRead,
/ Stores number of bytes read
&amp;port->m_ov);

/ pointer to the m_ov structure
// deal with the error code
if (!bResult)
{
switch (dwError = GetLastError())
{
case ERROR_IO_PENDING:
{
// asynchronous i/o is s
ill in progress
// Proceed on to GetOver
appedResults();

bRead = false;

break;

}
default:
{
// Another error has occ
red. Process this error.
port->ProcessErrorMessag
("ReadFile()");

break;

}
}
}
else

{
// ReadFile() returned complete. It is not neces
ary to call GetOv
erlappedResults()
bRead = true;

}
} // close if (bRead)

if (!bRead)
{
bRead = true;

bResult = GetOverlappedResult(port->m_hComm, // Handl
to COMM port


&amp;port->m_ov, // Overlapped structure

&amp;BytesRead, // Stores number of bytes read

true);
// Wait flag

// deal with the error code
if (!bResult)
{
port->ProcessErrorMessage("GetOverlappedResults(
in ReadFile()");


}
} // close if (!bRead)

LeaveCriticalSection(&amp;port->m_csCommunicationSync);


// notify parent that a byte was received
::SendMessage((port->m_pOwner)->Handle, WM_COMM_RXCHAR, (WPARAM)
RXB
uff, (LPARAM) port->m_nPortNr);

} // end forever loop

}


//
// Write a string to the port
//
void TSerialPort::WriteToPort(char* string)
{
assert(m_hComm != 0);


memset(m_szWriteBuffer, 0, sizeof(m_szWriteBuffer));

strcpy(m_szWriteBuffer, string);


// set event for write
SetEvent(m_hWriteEvent);

}

//
// Return the device control block
//
DCB TSerialPort::GetDCB()
{
return m_dcb;

}


//
// Return the communication event masks
//
DWORD TSerialPort::GetCommEvents()
{
return m_dwCommEvents;

}

//
// Return the output buffer size
//
DWORD TSerialPort::GetWriteBufferSize()
{
return m_nWriteBufferSize;

}

//----------------------------------------------------------------

thanks
let me try.

beta:
你给我寄的组件解压是老是出错,咋办?

又寄了一个过来,再不行就再告诉我一个信箱

到网站去找啊，这样的控件太多了
去delphi天空去找吧，有原码

sw:
你给的程序中子线程发出如下消息:
::SendMessage((port->m_pOwner)->Handle, WM_COMM_RXCHAR,
(WPARAM) RXBuff, (LPARAM) port->m_nPortNr);
其中参数RXBuff是主线程想要的数据.
请问如何处理这一消息,并得到数据?
谢谢!

beta:
收到了!
谢谢!

控件有spcomm(dephi深度历险）;
下面是我自已写过的：
function readbyte(fp:thandle):byte;
var
aa:byte;
ss:char;
buffersize:dword;
begin
buffersize:=4096;
readfile(hcom,aa,1,buffersize,overlapped);
ss:='T';
writefile(hcom,ss,1,buffersize,overlapped);
case aa of
176: aa:=45;
end;
readbyte:=aa;
end;

function readbyte1(fp:thandle):byte;
var
aa:byte;
ss:char;
buffersize:dword;
begin
buffersize:=4096;
readfile(hcom,aa,1,buffersize,overlapped);
ss:='T';
writefile(hcom,ss,1,buffersize,overlapped);
readbyte1:=aa;
end;


procedure TF_com.Button1Click(Sender: TObject);
var
lpdcb:tdcb;
datain,tt:byte;
dataout:char;
lc:array[0..76] of byte;
wylc:array[0..76] of byte;
buffersize:dword;
timeout:Tcommtimeouts;
well:array[0..76] of string;
i,j,rec_count,p,q,n:integer;
wy1,fh1,dl1:array[0..76,0..99] of byte;
zq1,zq1max,zq1min:array[0..76] of byte;
fm:array[0..76] of integer;
position:longint;
fz1,fz2:array[0..76] of single;
o,z:boolean;
dlip:array[0..200] of integer;
a,b,c:string;

jh:array[0..76] of string;
rq:array[0..76] of string;
zq:array[0..76] of single;
cc:array[0..76] of single;
fmax:array[0..76] of single;
fmin:array[0..76] of single;
wy:array[0..76,0..99] of single;
fh:array[0..76,0..99] of single;
dl:array[0..76,0..99] of single;
wy_string:string;
fh_string:string;
dl_string:string;
begin
try
label1.font.color:=clred;
label1.caption:='正在传输请稍候...！';
progressbar1.position:=0;
if radiobutton1.Checked=true then
hcom:=createfile('com1',generic_read or generic_write,0,nil,open_existing,
file_flag_overlapped,0);
if radiobutton2.Checked=true then
hcom:=createfile('com2',generic_read or generic_write,0,nil,open_existing,
file_flag_overlapped,0);

if hcom=invalid_handle_value then
else
begin
setupcomm(hcom,4096,4096);
getcommstate(hcom,lpdcb);
lpdcb.baudrate:=2400;
lpdcb.bytesize:=8;
lpdcb.parity:=noparity;
setcommstate(hcom,lpdcb);
getcommstate(hcom,lpdcb);
end;
timeout.readintervaltimeout:=10;
timeout.readtotaltimeoutmultiplier:=20;
timeout.readtotaltimeoutconstant:=30;
setcommtimeouts(hcom,timeout);
setevent(hcom);
dataout:='S';
buffersize:=4096;
writefile(hcom,dataout,1,buffersize,@overlapped);
readfile(hcom,datain,1,buffersize,@overlapped);
rec_count:=datain;
for i:=0 to rec_count-1do
begin
if check_2=40 then
begin
for j:=0 to check_2-1do
begin
tt:=readbyte(hcom);
//载荷量程标志
if j=32 then
lc:=tt;
//冲次
if j=34 then
cc:=60/(tt/10);
//位移最大
if j=35 then
begin
zq1:=tt;
zq1max:=tt;
end;
//位移最小
if j=36 then
begin
zq1:=zq1-tt;
end;
//负荷最大
if j=37 then
begin
if lc>127 then
fmax:=tt*120/256
else
fmax:=tt*65/256;
end;
//位移量程标志
if j=38 then
wylc:=tt;
//负荷最小
if j=31 then
begin
if lc>127 then
fmin:=tt*120/256
else
fmin:=tt*65/256;
end;
well:=well+char(tt);
end;
//end for j
end//end of if
else
begin
for j:=0 to check_2-1do
begin
tt:=readbyte(hcom);
//载荷量程标志
if j=14 then
lc:=tt;
//冲次
if j=16 then
cc:=60/(tt/10);
//位移最大
if j=17 then
zq1:=tt;
//位移最小
if j=18 then
begin
zq1:=zq1-tt;
end;
//负荷最大
if j=19 then
begin
if lc>127 then
fmax:=tt*120/256
else
fmax:=tt*65/256;
end;
//位移量程标志
wylc:=0;
//负荷最小
if j=13 then
begin
if lc>127 then
fmin:=tt*120/256
else
fmin:=tt*65/256;
end;
well:=well+char(tt);
end;
//end for j
end;

for j:=0 to 99do
fh1[i,j]:=readbyte1(hcom);
for j:=0 to 99do
wy1[i,j]:=readbyte1(hcom);
for j:=0 to 99do
dl1[i,j]:=readbyte1(hcom);
writefile(hcom,dataout,1,buffersize,@overlapped);
if check_2=40 then
begin
jh:=copy(well,1,14);
rq:=copy(well,17,8);
end
else
begin
jh:=copy(well,1,7);
rq:=copy(well,8,4);
end;
position:=i+1;
inc(position);
progressbar1.position:=0;
progressbar1.position:=position*100 div rec_count;
application.processmessages;
end;
//end for i
closehandle(hcom);

发一个给你.

用sw的方法搞定，
谢谢各位！

多人接受答案了。