read com port in winapi

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10-14-2002
balle

read com port in winapi

Hi

I am making some hardware to a pc were i need some software to get all info that the com 2 ( $2f8 ) sends into the pc collected in a text file and in the same time being viewed on the screen while running.
the buffer needs to be read every sec. the signal that is comming in is 8 bit.

now i hoped that some of the clever guys in programming could help me out with an with an exsample that does this. i got the dev c++ compiler. or is willing to give me a big hand with this since i am new to this

brgrds

Glenn
10-14-2002
kuphryn

Here is an algorithm to one solution.

-----
ifstream input;
input.open("COM2", ios::in);
read();
input.close();

ofstream output;
output.open("COM2", ios::out);
write();

// Another solution running in Win32.

HANDLE hFile = CreateFile("COM2",...);
-----

You will need to implement a non-blocking I/O model for serial-port communication. Read this article at MSDN.

http://msdn.microsoft.com/library/de...sdn_serial.asp

Kuphryn
10-16-2002
master5001

I may be wrong here and certainly too lazy to look it up myself but I believe you would use DeviceIoControl().
10-17-2002
balle

hmmm

I think this is to complicated todo myself.
10-17-2002
Sebastiani

Quote:

I think this is to complicated todo myself.

Then perhaps you should choose a project that you can handle, right :confused:
10-17-2002
balle

:O) yaa But

I don`t know any who do c++ and i really need this for my hardware i created....if any of you know someone ( or yourself maybe ) who is good at this ( really good i guess ) and want to earn some money i would be happy to pay for this.

Glenn
10-17-2002
kuphryn

I assure you that the design and implementation of non-blocking I/O for serial communication is not difficult. I believe the article at MSDN caused you to think different. Look at the article and you will notice there are many lines of comments. The actual design and implementation code is quite simple.

I highly recommend you read it over and try to code it. Afterward, modify it to fit your design.

Kuphryn
10-17-2002
balle

:O) yaa But

I don`t know any who do c++ and i really need this for my hardware i created....if any of you know someone ( or yourself maybe ) who is good at this ( really good i guess ) and want to earn some money i would be happy to pay for this.

Glenn
10-17-2002
balle

i will give it a chance more

if you say it is not that hard i believe you
10-17-2002
Davros

Mercenary

> ...and want to earn some money i would be happy to pay for this

I wrote a C++ class to do this a while back. Check out the public section of class below. I guess you want it documenting, which I could do over the weekend. We would need to agree a price & other details. If you're interested, drop me a mail.

[email protected]

Code:

class CommPort { private: // Private stuff cut from here public: CommPort(); virtual ~CommPort(); HANDLE getPortHndl(); bool active(); void open(); void open(int portNum); void setPortDefaults(); int readBlock(void * block, int blkSize); char readChar(); int peekBlock(void * block, int blkSize); char peekChar(int count); int writeBlock(const void * block, int blkSize); bool writeChar(char c); int writeString(const AnsiString& str); void flushRxBuf(); void flushTxBuf(); void close(); int getPortNum(); void setPortNum(int portNum); CommBaud getBaud(); void setBaud(CommBaud baud); int getDataBits(); void setDataBits(int dbts); CommStopBits getStopBits(); void setStopBits(CommStopBits stopBits); CommParity getParity(); void setParity(CommParity parity); int getRxBufSize(); void setRxBufSize(int bufSize); int getTxBufSize(); void setTxBufSize(int bufSize); int getRxBufUsed(); int getTxBufUsed(); bool getRxBufEmpty(); CommSwFlow getSwFlow(); void setSwFlow(CommSwFlow flowCntrl); int getRxBufXOn(); void setRxBufXOn(int xOnLim); int getRxBufXOff(); void setRxBufXOff(int xOffLim); char getXOnChar(); void setXOnChar(char XOn); char getXOffChar(); void setXOffChar(char XOff); bool getTxCtsFlow(); void setTxCtsFlow(bool cts); bool getTxDsrFlow(); void setTxDsrFlow(bool dsr); CommDtrFlow getDtrFlow(); void setDtrFlow(CommDtrFlow dtr); CommRtsFlow getRtsFlow(); void setRtsFlow(CommRtsFlow rts); void clearBreak(); void setBreak(); bool getCtsState(); bool getDsrState(); bool getRingState(); bool getRlsdState(); int getRxTimeout(); void setRxTimeout(int millisec); int getRxTimeoutMult(); void setRxTimeoutMult(int millisec); int getRxTimeoutConst(); void setRxTimeoutConst(int millisec); int getTxTimeoutMult(); void setTxTimeoutMult(int millisec); int getTxTimeoutConst(); void setTxTimeoutConst(int millisec); bool showConfigDlg(); bool showDefConfigDlg(); AnsiString getConfigStr(); AnsiString getSettableStr(); };
10-17-2002
Sebastiani

Very impressive class, Davros. Looks like money well spent!
10-17-2002
golfinguy4

balle, what do you need? If it isn't too complicated, I'm sure someone might do it quickly for free.
10-20-2002
Nor

lol programs made for programmers
10-21-2002
balle

needs

what i need is a full screen window with 3 pages ( tabs ). each window need to be splittet into 4 windows .

now tab one need to have one window ( window 1, page 1 ) where the is 2 checkboxes and a textfield showing the content of a file ( this file will have max. 10 letters in upper left frame .)
The second tab page need to show all input streaming in from comport 2 ( port adress $2f8-3ff ) an update live all the timer when focus on that tab.
3 tab is for a big picure in the first uppper left frame. The upper right fram is some simple text. the below left frame is showing content of a small textfile too. and the last below right frame is used to enter some text into a textfile for saving it when pushing "save" button.

hope it is just a bit understandable :)
and one of you could help me out.
10-21-2002
balle

needs

what i need is a full screen window with 3 pages ( tabs ). each window need to be splittet into 4 windows .

now tab one need to have one window ( window 1, page 1 ) where the is 2 checkboxes and a textfield showing the content of a file ( this file will have max. 10 letters in upper left frame .)
The second tab page need to show all input streaming in from comport 2 ( port adress $2f8-3ff ) an update live all the timer when focus on that tab.
3 tab is for a big picure in the first uppper left frame. The upper right fram is some simple text. the below left frame is showing content of a small textfile too. and the last below right frame is used to enter some text into a textfile for saving it when pushing "save" button.

hope it is just a bit understandable :)
and one of you could help me out.