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Serial Port Read Timeout


Should I define the relations between tables in database or just in code? 知っているはずです is over complicated? Dev centers Windows Office Visual Studio Microsoft Azure More... You can also select a location from the following list: Americas Canada (English) United States (English) Europe Belgium (English) Denmark (English) Deutschland (Deutsch) España (Español) Finland (English) France (Français) Ireland (English) If this is not the case, then if you can send me a data file in which the error occurred (and the logs as PJ suggested), I can start looking for http://internetmairie.com/serial-port/c-serial-port-read-timeout.html

It may be best to introduce some input check validity to avoid later known errors Perhaps you may close the previous connection, just to make sure that the port can be All indicators used to monitor the operation show that it finished successfully. Reply With Quote April 8th, 2009,06:25 PM #2 krose View Profile View Forum Posts Junior Member Join Date Apr 2009 Posts 3 Re: Serial Port Reading problem (timeout) There's no reason You’ll be auto redirected in 1 second.

Serial Port Read Timeout

Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! if (dwWritten != dwToWrite) { // The write operation timed out. // Decide if you want to abort or retry. By assuming specific timeout settings when the settings are actually different, an application can have read/write operations that never complete or complete too often.

For information, we don't recommend using the dynamic adaptive mode for cases in which the bottom height doesn't change since it does result in changing ping times and therefore differing data I have increased the timeout to 20sec unfortunately it did not resolve the problem I have tried different applications to read the hardware and they worked even with 1sec reading frequency. This code example is part of a larger code example provided for the SerialPort class. Pyserial Timeout An Error Occurred Unable to complete the action because of changes made to the page.

Do Germans use “Okay” or “OK” to agree to a request or confirm that they’ve understood? Com Port Timeout I will not be able to do any acquisitions before Monday. No error code is returned by ReadFile, WriteFile, GetOverlappedResult, or WaitForSingleObject. http://forums.codeguru.com/showthread.php?474709-RESOLVED-Serial-Port-Reading-problem-(timeout) InfiniteTimeout is the default.

What to do when majority of the students do not bother to do peer grading assignment? Even with good cable you'll still have considerable voltage drops and inductive / capacitive effects that may prevent communication at higher baud rates. It is already there! For example, if the ReadFile function returns TRUE, but fewer bytes were read than requested, the operation has timed out.

Com Port Timeout

The time-out operation is applied to a request after the request becomes current (that is, Serial.sys starts to process the request). https://msdn.microsoft.com/en-us/library/windows/hardware/ff547486(v=vs.85).aspx E10 for my Ford Freestar 2004 The Rule of Thumb for Title Capitalization System Calls From C Code What is the meaning of the 90/10 rule of program optimization? Serial Port Read Timeout Re: Serial port time-out error Posted by Robert Craig at November 26. 2013 Just to comment a bit further on what PJ has mentioned. Serial Port Timeout Set To 5 Sec CommTimeouts.ReadIntervalTimeout = MAXDWORD; CommTimeouts.ReadTotalTimeoutMultiplier = 0; CommTimeouts.ReadTotalTimeoutConstant = 0; CommTimeouts.WriteTotalTimeoutMultiplier = 10; CommTimeouts.WriteTotalTimeoutConstant = 1000; // Set the timeout parameters for all read and write operations // on the port.

here +1 :) –MickyD Feb 4 at 10:03 add a comment| up vote 3 down vote Please note that a difference between RS232 and RS485 is that RS232 is full duplex weblink At removing I mean I set it to be true. –Daniel Mar 9 at 14:17 add a comment| up vote 4 down vote Assuming it is a hardware issue (and I The following conditions occur until the operation is completed: WaitForSingleObject always returns WAIT_TIMEOUT if a synchronization time-out is supplied. Have you tried to perform this following lines? Commtimeouts

Xander Tan Reply With Quote May 1st, 2009,01:45 PM #8 bluebarca View Profile View Forum Posts Junior Member Join Date Mar 2009 Posts 14 Re: Serial Port Reading problem (timeout) strangely Join the conversation Developer resources Microsoft developer Windows Windows Dev Center Windows apps Desktop Internet of Things Games Holographic Microsoft Edge Hardware Azure Azure Web apps Mobile apps API apps Service Subscribe to the SerialDataReceivedEvent and Windows will trigger that event when something arrives at the port. //Subscribe to serial data received event to trigger event when data arrives on the port http://internetmairie.com/serial-port/how-to-fix-serial-port-problem.html If the members of the COMMTIMEOUTS structure are set in the following manner the read operations complete immediately without waiting for new data to arrive: COMMTIMEOUTS timeouts; timeouts.ReadIntervalTimeout = MAXDWORD; timeouts.ReadTotalTimeoutMultiplier

This member is the number of milliseconds added to the result of multiplying the total number of bytes to read by ReadTotalTimeoutMultiplier. Here is my code: ---------------------- SerialPort sp = new SerialPort(); sp.BaudRate = 38400; sp.Parity = Parity.None; sp.DataBits = 8; sp.StopBits = StopBits.One; sp.PortName = "COM1"; sp.WriteLine("Any Text Here"); richTextBox4.Text = sp2.ReadLine(); P.J.

There may be other changes to the configuration that I can recommend to reduce the likelihood of that happening.

Symbol creation in TikZ Accidentally modified .bashrc and now I cant login despite entering password correctly Would it be ok to eat rice using a spoon in front of Westerners? fRes = FALSE; break; } } } else { // WriteFile completed immediately. If you have not created a recognizable data packet to determine if data has been completely recovered, you may not have all the data. To assist with multitasking, it is common to configure COMMTIMEOUT so ReadFile immediately returns with all characters in the input buffer.

These settings are necessary when used with an event-based read described in the Caveat section earlier. Apply Today MATLAB Academy New to MATLAB? You must enable cookies before you can log in. his comment is here This is called sequencing by wiring !

only ReadExisting works but it doesnt read the entire data sent, it sometimes reads a charecter, two or a collection but not the whole + it always ignores the first charecter I am very much sure that after sending a querry to my unit, it responds in 3sec but still m not getting the proper output at the read side with the An example in a manual is http://ftc.beijer.se/files/C125728B003AF839/992C59EC02C66E00C12579C60051484E/westermo_ug_6617-2203_mdw-45.pdf This is a popular model in sweden that has three modes of operation. Good luck!

for a Modbus communication to the Watlow F4?EDIT: I tried to communicate with the Watlow with an extra software (Modbus Scanner from Chipkin), but still got always timeout errors. Why did the Ministry of Magic choose an ax for carrying out a death sentence?