windows serial port programming c

... the serial port one calls the functions } Provided that the serial port is successfully opened at which the serial port can send and receive data the next step is to configure it to the speci c ... // connected (some devices // don’t explicitly connect) Create a DCB object and initialize it using the O_RDWR | O_NOCTTY | O_NDELAY function BuildCommDCB() ); if(fd == -1) { Set the serial port ... device file As can be seen, if the open() function call fails, the device handle is set Code to accomplish this can be found below to −1 and by checking the handle against this value DCB dcb; //create...

Ngày tải lên: 05/11/2013, 20:15

... inexpensive cables and small connectors In PCs, applications access most serial ports as COM ports Applications that use Microsoft’s NET Framework class library can use the SerialPort class to access COM ... uses checksums on ASCII Hex data The cyclic redundancy check (CRC) method uses more complex calculations to obtain checksum values Protocols that use CRC values include the file-transfer protocols ... this type of port on an expansion card • RS-232 ports on PC Cards (also called PCMCIA cards) Any PC with a free PC-Card slot can use these • Serial ports that connect to PCs via USB converter modules...

Ngày tải lên: 06/11/2013, 08:15

... %ax,0 i386 clock cycles 3 2 i486 clock cycles 1 1 Clock cycles for Pentiums should be the same as for i486, except that on Pentium Pro/II, add %ax, may take only 1/2 clock cycles It can sometimes ... x86 architecture rdtsc for Pentiums For Pentiums, you can get the number of clock cycles elapsed since the last reboot with the following C code (which executes the CPU instrution named RDTSC): ... or Pentium processors (or 12 clock cycles on an i386) asm() is translated into inline assembler code by gcc, so there is no function call overhead Shorter delays than one clock cycle are impossible...

Ngày tải lên: 22/12/2013, 10:15

... t đ u: C c xung clock d ch bit đư c g i chân TxD d li u t thi t b bên ngồi đư c d ch vào chân RxD b i xung clock d ch bit (vi c d ch d li u vào chân RxD x y c nh lên c a xung clock d ch bit) ... lý Trong ch đ này, bit d li u đư c thu bit th đưa đ n RB8 Port c th đư c l p trình cho bit stop đư c nh n, ng t port n i ti p ch đư c tích c c n u RB8=1 ð c trưng c th đư c b ng c ch set bit ... M t ng d ng kh thi c a ch đ (ch đ ghi d ch bit) m r ng thêm ngõ cho chip 8051 M t vi m ch ghi d ch n i ti p – song song c th đư c n i v i chân TxD RxD c a chip 8051 đ cung c p thêm đư ng xu t...

Ngày tải lên: 20/01/2014, 19:20

... Sonbui1903 II: C c ví dụ C c câu lệnh sử dụng với Serialport xem tại: http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx#Y3078 1: Chat hai máy tính sử dụng c ng Com đơn giản ... Sonbui1903 Code: Private Sub SerialPort1_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived Control.CheckForIllegalCrossThreadCalls ... lòng chọn c ng kết nối " & ComboBox1.Text End If Catch ex As Exception MsgBox(ex.ToString) End Try End Sub Nhận: Chọn kiện nhận Chọn serialport -> DataReceived Chat hai máy tính qua c ng Com TUT...

Ngày tải lên: 09/03/2014, 20:20

... Processor Architecture Smartphone Hardware Components Accessing the Microphone Accessing the Microphone on iOS Accessing the Microphone on Android Accessing the Microphone on WP7 Accessing the Camera ... top of the Windows CE 3.0 kernel and supported multiple processor architectures, including Acorn RISC Machine (ARM), where RISC stands for Reduced Instruction Set Computer, Microprocessor without ... 242 Accessing the Camera on iOS Accessing the Camera on Android Accessing the Camera on WP7 Using Sensors 242 243 244 245 Accessing the Sensors on iOS Accessing the Sensors on Android Accessing...

Ngày tải lên: 05/05/2014, 12:42

... pc c chuẩn T c độ truyền cao qua c p Đư c ứng dụng với máy qt, thiết bị lưu trữ mở rộng đĩa c ng, nhiều thiết bị ngoại vi đ c biệt kh c SERIAL PORT C ng nối tiếp phần PC đời Với c ng Com Comm ... PC PC kh c, thiết bị ngoại vi SERIAL PORT Ethernet chuẩn mạng gần gũi thường dùng nhiều mạng T c độ cao u c u phần c ng phần mềm ph c tạp, đắt nhiều so với chuẩn kh c Chuẩn máy in Cenntronics(IEEE-1284) ... Comm (communications) PC c ng nối tiếp khơng đồng điều khiển UART Mỗi c ng Com c giao diện RS232, RS – 485 Mỗi PC c dạng kh c cổng nối tiếp USB, Firewire, I 2C chúng dùng giao th c kh c u c u...

Ngày tải lên: 29/06/2014, 15:20

... PICmicro MID-RANGE MCU FAMILY 16.1 Introduction The Basic Synchronous Serial Port (BSSP) module is a serial interface useful for communicating with other peripheral or microcontroller devices ... low level In I 2C mode: SCK release control = Enable clock = Holds clock low (clock stretch) (Used to ensure data setup time) DS31016A-page 16-4 © 1997 Microchip Technology Inc Section 16 BSSP ... Interfacing a Microchip PIC1 6C9 2x to Microchip SPI Serial EEPROM AN668 © 1997 Microchip Technology Inc DS31016A-page 16-25 BSSP This section lists application notes that are related to this section...

Ngày tải lên: 29/07/2014, 10:20

... the code protection feature on PICmicro® MCUs • • • • • • The PICmicro family meets the specifications contained in the Microchip Data Sheet Microchip believes that its family of PICmicro microcontrollers ... dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, ... received Please check the Microchip BBS for the latest version of the source code Microchip’s Worldwide Web Address: www.microchip.com; Bulletin Board Support: MCHIPBBS using CompuServe® (CompuServe...

Ngày tải lên: 11/01/2016, 11:50

... map.put(cpi.getName(), cpi); if (cpi.getPortType() == CommPortIdentifier .PORT _SERIAL) { serialPortsChoice.setEnabled(true); serialPortsChoice.addItem(cpi.getName()); } else if (cpi.getPortType() == CommPortIdentifier .PORT_ PARALLEL) ... C: \javasrc\commport>java CommPortOpen Exception in thread "main" javax.comm.PortInUseException: Port currently owned by Unknown Windows Application at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337) ... IOException, NoSuchPortException, PortInUseException, UnsupportedCommOperationException { new SerialLogger(); } /* Constructor */ public SerialLogger() throws IOException, NoSuchPortException, PortInUseException,...

Ngày tải lên: 27/10/2013, 14:15

... parallel data acquisition A CCD camera is an electronic imaging device The camera is composed of a CCD chip and associated electronics The CCD chip converts incident light into packets of charge distributed ... the CCD chip is done using various clock signals called horizontal and vertical shift clocks The electronics onboard the CCD controller generates these clock signals Subsequently, the voltage corresponding ... play_cport(void) { static unsigned char c; while(!kbhit()) { outportb(0x37a, c) ; printf("\nCONTROL port = %X" ,c) ; c+ +; sleep(1); } getch(); } void dout_cin(void) { static unsigned char dout, cin;...

Ngày tải lên: 04/11/2013, 18:15

... Language (Microsoft-Centric View) Year Introduced Language Interface 1985 C Windows application programming interface (API) 1992 C+ + Microsoft Foundation Class (MFC) Library 2001 C# or C+ + Windows ... represent each character in strict ASCII, or the bits per character that have become common in extended ASCII character sets on computers, Unicode uses a full 16 bits for character encoding This ... amusingly obscure code C# also supports a goto in the switch and case construction to branch to another case: switch (a) { case 1: b = 2; goto case 3; case 2: c = 7; goto default; case 3: c = 5; break;...

Ngày tải lên: 10/12/2013, 14:16

... to obtain access to photographed images, perhaps for some image processing • Accelerometer An accelerometer detects acceleration, which in physics is a change in velocity When the camera is still, ... on the screen; SizeChanged is supported by elements to indicate when they’ve changed size; LayoutUpdated is useful when you want notification that a layout cycle has occurred, such as occurs when ... or dark text on a light background Most user input to a Windows Phone program will come through multi-touch The screens incorporate capacitance-touch technology, which means that they respond...

Ngày tải lên: 10/12/2013, 14:20

... this custom PowerShell snap-in private Collection cmdlets; 23 Page 23 Kumaravel c0 2.tex Chapter 2: Extending Windows PowerShell public override Collection ... Framework Csc.exe is a C# compiler I have the NET Framework 2.0 installed on my 32-bit machine, and csc.exe and installutil.exe can be found at the following location: C: \Windows\ Microsoft.NET\Framework\v2.0.50727\csc.exe ... C: \Windows\ Microsoft.NET\Framework\v2.0.50727\csc.exe C: \Windows\ Microsoft.NET\Framework\v2.0.50727\installutil.exe On a 64-bit operating system, you can find them at this location: C: \Windows\ Microsoft.NET\Framework64\v2.0.50727\csc.exe...

Ngày tải lên: 13/12/2013, 02:16

... 01/07/2008 Chapter 1: Introduction to PowerShell Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet ... get-command cmdlet helps you with that: PS C: \> get-command CommandType Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Cmdlet Name -Add-Content ... Interaction 303 Drive-Speci c Cmdlets Item-Speci c Cmdlets Container-Speci c Cmdlets Property-Speci c Cmdlets Dynamic Property Manipulation Cmdlets Content-Related Cmdlets Security Descriptor–Related...

Ngày tải lên: 13/12/2013, 02:16

... ECP Modes 296 Fast Centronics Test Mode Configuration Mode An ECP Application 298 16 PC-to-PC Communications 305 A PC-to-PC Cable 305 Dos and Windows Tools 306 MS-DOS's Interlnk Direct Cable Connection ... then click Connect to view the available ports Select a port and click OK, or Cancel to make no changes In Windows 95, the Control Panel lists available ports under System Properties, Device Manager, ... just D connector The IEEE 1284 standard for the parallel port calls it the IEEE 1284-A connector Newer parallel ports may use the new, compact, 36-contact IEEE 1284 -C connector described in Chapter...

Ngày tải lên: 22/01/2014, 11:20

... this rectangle is used to determine the width of a monitor: BScreen BRect int32 mainScreen(B_MAIN_SCREEN_ID); screenRect; screenWidth; screenRect = mainScreen->Frame(); screenWidth = screenRect.right ... clicks that occur when the window is the frontmost, or active, window Workspace The BWindow constructor has an optional fifth parameter, workspaces, that specifies which workspace or workspaces ... million microseconds, or one second, while the second call pauses execution for fifty thousand microseconds, or one-twentieth of one second: bigtime_t microseconds = 1000000; snooze(microseconds);...

Ngày tải lên: 26/01/2014, 07:20

... (Virtual Address Space) C c hàm xử lý nhớ ảo (Virtual Memory Functions) Về hàm xử lý nhớ chuẩn C/ C++ Chương 4: Thư viện đồ họa GDI (Graphics Device Interface) Giới thiệu Một chương trình minh họa ... Bitmap In ấn (Printing) Chương 5: Xử lý Clipboard Giới thiệu C c kiểu định dạng liệu (data format) dùng Clipboard C c kỹ thuật thao t c Clipboard Xây dựng Clipboard Viewer Chương 6: Multi-Media ... Kruglinski and Scott Wingo and George Shepherd - Programming Microsoft Visual C+ + 5th Edition - Microsoft Press, 1998 MSDN www.codeguru.com 10 www.codeproject.com VI Qui định th c hành: - Ngôn...

Ngày tải lên: 27/01/2014, 02:20

... 1994 CE 1.0 Windows CE 1.0 1997 CE 2.0 Windows CE 2.0 2000 CE 3.1 Pocket PC 2000 2002 CE 3.2 Pocket PC 2002 2003 CE 4.2 Windows Mobile 2003 2004 CE 4.2 Windows Mobile 2003 SE 2005 CE 5.0 Windows ... (Visual C# ) Windows Phone Databound Application (Visual C# ) Windows Phone Class Library (Visual C# ) Windows Phone Panorama Application (Visual C# ) Windows Phone Pivot Application (Visual C# ) Windows ... Acceleration Combining simulated gravity with acceleration gives us code that can cause objects to affect each other realistically in space www.it-ebooks.info Resource Files 24 The Black Hole Game...

Ngày tải lên: 06/03/2014, 09:22