Error Writing Dcb 1
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RS232 Hardware Interface RS232C History RS232C Likely problems Hardware Hardware Properties Bit Rates DTE/DCE Speeds Flow control The UART Types of UARTs buildcommdcb Null modems Loop Back Plug Registers Port Addresses Table of registers DLAB
Setcommstate Example
IER IIR FCR LCR LSR MCR Scratch Register Interfacing devices Waveforms Level converters 8250 UARTs Microcontrollers Programming setcommstate function failed About Programming Open port Setup COM-port TimeOuts Purge COM-port Work with DCB Read and Write Event Adding Enumports Structure DCB COMSTAT OVERLAPPED COMMTIMEOUTS PORT_INFO_* Work with DCB
C++ Dcb
The port setting is carried out with the help of the DCB (Device-Control Block) structure.By filling this structure with needed values you can change the connection parameters to those needed at the moment. To initially create the DCB structure with necessary general settings (baud rates, patity, number of bits, number of stop bits and flow control) setcommtimeouts is carried out by the BuildCommDCB function. Function syntax: BOOL BuildCommDCB (LPCTSTR lpDef, LPDCB lpDCB); This function is very useful as it sets the parameters of DCB structure which can be transmitted to the port just like *mode* command. If you remember MS DOS, null modem cable and connection between two computers: sending a string returns the DCB structure. String example: baud=1200 parity=N data=8 stop=1 Function example: DCB dcb; ZeroMemory(&dcb,sizeof(DCB)); char buffer[100]; strcpy(buffer,"baud=1200 parity=N data=8 stop=1"); if (BuildCommDCB((char*)&buffer,&dcb)) { if (dcb.BaudRate == CBR_1200) cout << "Yes " << endl; } else cout << " error config DCB"; In case of successful termination BuildCommDCB() returns any value but zero, otherwize zero. This function replaces only explicit members with some exceptions. For 9600,n,8,1strings (not ending in x or p characters): fInX, fOutX,fOutXDsrFlow, fOutXCtsFlow are set to FALSE fDtrControl is set to DTR_CONTROL_ENABLE fRtsControl is set to RTS_CONTROL_ENABLE For 9600,n,8,1,x strings (ending in ő character): fInX, fOutX are set to TRUE fOutXDsrFlow,fOutXCtsFlow are set to FALSE fDtrControl is set to DTR_CONTROL_
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Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers writefile Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > Calling SetCommState on a DCB results in Returned (1) Incorrect function. Want to Advertise Here? Solved Calling http://www.lookrs232.com/com_port_programming/api_work_with_dcb.htm SetCommState on a DCB results in Returned (1) Incorrect function. Posted on 2005-10-18 Visual C++.NET 1 Verified Solution 6 Comments 1,708 Views Last Modified: 2010-05-18 Here is the code for SetCommState if (!SetCommState(hCom, &dcb)) { // Handle the error CloseHandle(hFile); CloseHandle(hCom); https://www.experts-exchange.com/questions/21598746/Calling-SetCommState-on-a-DCB-results-in-Returned-1-Incorrect-function.html RegCloseKey(hKey); SendMessage(hDlg, LPSTATUS_END, (WPARAM)GetLastError(), (LPARAM)PRINTERR_OUT_SET); return PRINTERR_OUT_SET; } only legal values seem to have been applied to the DCB prior to this call, and an earlier call to GetCommState succeeds. I have hundreds of clients running fine, but one is reporting this problem on multiple pcs. GetLastError() returns Returned (1) Incorrect function. Googling this error has only turned up that it is a constant for INVALID_FUNCTION, but thats obviously worthless. Any ideas? I have additional code to post, if necessary. 0 Question by:neverrealm Facebook Twitter LinkedIn Google LVL 15 Best Solution bylakshman_ce Please check to see these.. The SetCommState function fails if the XonChar member of the DCB structure is equal to the XoffChar member. To set only a few members of the DCB structure, you should Go to Solution 6 Comments LVL 15 Overall: Level 15 Visual C++.NET 11 Message Accepted Solution by:lakshman_ce2005-10-18 Please check to see these.. The SetCommState function fails if the XonChar member of the
SQL Server 2014 Express resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired https://social.msdn.microsoft.com/Forums/en-US/ad18e2a1-c25b-43e7-8b8d-019073db2c6f/why-setcommstate-error-87-?forum=vssmartdevicesnative content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove http://forums.informationbuilders.com/eve/forums/a/tpc/f/7971057331/m/4751090262 From My Forums Answered by: why SetCommState error 87 ? Smart Device Development > Visual Studio Smart Device Development - Native C++ Project Question 0 Sign in to vote Is anyone familiar with error writing error 87 - invalid parameter from the SetCommState function ? Here's what I have :  BOOL gs2 = GetCommState(hCOM2, &dcb2);  dcb2.BaudRate = 312500;  dcb2.ByteSize = BIT;  dcb2.Parity = PARITY;  dcb2.StopBits = STOP;  bStatus2 = SetCommState(hCOM2, &dcb2);  DWORD dw = GetLastError(); I open the first serial port (which is a USB) & the handle is valid, GetCommState returns OK, & error writing dcb SetCommState returns OK. I open the second serial port hCOM2 (which is a RS232) & the handle is valid, GetCommState returns OK, but SetCommState returns error 87 ! I can't figure out what the problem is ! Any suggestions ? ak Tuesday, February 21, 2006 4:48 PM Reply | Quote Answers 0 Sign in to vote Hi ak It seems you might have handshaking enabled on the port and a timeout set to about 90 seconds. If timeout is set the function exits with return value 1 after the timeout period has expired, and the bytestransmitted will contain no. of bytes actually transmitted. Check if handshaking is enabled and if so make sure the device on the other end is keeping the handshaking high. otherwise disable handshaking in the DCB structure. Regards Mathew Sunday, February 26, 2006 5:49 PM Reply | Quote All replies 0 Sign in to vote I've realized that my baud rate is to high. I've switched to 115200 & now SetCommState works fine. But now I have an issue with WriteFile. The intent is to pass through data : reading it in thru one port & writing it onto another port, byte by
User Edition * Higher Education Technical Forum Forum Guidelines FAQ's | Best Practices | Updating your signature Do your search first | Tag your topic with keywords Contact Us Let's Get Social! | | | IB Bloggers Advanced Technical Search Focal PointFocal Point ForumsWebFOCUS/FOCUS Forum on Focal Point FOC$HOLD error FOC350 (out of space)Go New Search Notify Tools Reply Admin New PM! Personal Zone»Member DirectoryFocal Point Forums»ProfileBuddiesIgnore ListGroupsPermissionsPrivate MessagingNotificationsKarmaPreferencesFavoritesMore...DiscussionPollPrivate MessageKeyword SearchSearch current forum only Advanced SearchNew Since your Last VisitActive Topics in this CategoryAdd to My FavoritesPrinter Friendly FormatHelpManage TopicManage Content in This TopicManage MembersOnline NowControl PanelFOC$HOLD error FOC350 (out of space)Login/JoinWelcome, [Logout]RonnSilver Member posted December 17, 2007 05:01 PMI am getting the following message when creating a hold file:0 ERROR AT OR NEAR LINE 177 IN PROCEDURE OCEACCESFOCEXEC * (FOC350) ERROR WRITING OUTPUT FILE: FOC$HOLD 1 0 NUMBER OF RECORDS IN TABLE= 687347 LINES= 147744 0 I noticed that when I use a RECORDMILIT of 1000, this works fine.I run the focexec through the ff simple JCL://IBATCH1 EXEC PROC=IRUNBATT //TSCOM300.EDAPARM DD * -T //TSCOM300.EDAENV DD // DD * TRMIN=//DD:INPUT TRMOUT=//DD:OUTPUT *EDACURDIR=/U/IADMIN/IBI/SRV71/WFM/EDATEMP//TSCOM300.INPUT DD * EX OCEACCES //* //TSCOM300.OUTPUT DD SYSOUT=* // I have tried using bigger space allocation for FOCSORT, INT, and INT1 in both JCL and my PROC IRUNBATT, but it appears that it is not using those substitutions.Then I tried...DYNAM SET TEMP FOR FOC$HOLD CYLS 100,20 DSORG PS NEW REUSEDYNAM SET TEMP FOR FOCSORT SPACE CYLS 100,20 DSORG PS NEW REUSEDYNAM SET TEMP FOR HOLDMAST SPACE CYLS 100,20 DSORG PO DIR 36 NEW REUSEbut I keep getting a syntax error, even after using the exact example in the book.Please he