c programming parallel port

... { serialPortsChoice.setEnabled(true); serialPortsChoice.addItem(cpi.getName()); } else if (cpi.getPortType() == CommPortIdentifier .PORT _PARALLEL) { parallelPortsChoice.setEnabled(true); parallelPortsChoice.addItem(cpi.getName()); } ... javax.comm.PortInUseException: Port currently owned by DarwinSys DataComm at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337) at CommPortOpen.main(CommPortOpen.java:41) C: \javasrc\commport> To ... */ CommPortIdentifier thePortID; /** The chosen Port itself */ CommPort thePort; public static void main(String[] argv) throws IOException, NoSuchPortException, PortInUseException, UnsupportedCommOperationException...

Ngày tải lên: 27/10/2013, 14:15

... Some popular latch ICs. Name Description 74HCT373 Octal D-type latch 74HCT573 Octal D-type latch Page 24 Counters Counters, as the name suggests, count. The counter has a clock input pin, a reset ... popular counter ICs. Name Description 74LS90 Decade counter 74HCT4024 Six-stage binary counter 74HCT4040 12-Stage binary counter 74HCT190 Synchronous decade up/down counters with mode control 74HCT191 ... The choice of a communication link also depends on the digital circuit, so the question becomes a sort of a chicken and egg problem. Options for the digital circuit include: • The digital circuit...

Ngày tải lên: 04/11/2013, 18:15

Ngày tải lên: 22/01/2014, 11:20

... used in comparisons with other characters. Certain characters can be represented in character and string constants by escape sequences like \n (newline); these sequences look like two characters, ... the other is specifically called for. For instance, consider the function squeeze(s ,c) , which removes all occurrences of the character c from the string s. /* squeeze: delete all c from s */ ... A character constant is an integer, written as one character within single quotes, such as 'x'. The value of a character constant is the numeric value of the character in the machine's character...

Ngày tải lên: 16/08/2012, 11:09

... • Mỗi c u lệnh viết trên một dòng. C c câu lệnh c ng c p viết trên c ng một c t, c c câu lệnh c c p nhỏ hơn viết thụt vào trong, c ch lệnh c p trên bằng một khoảng Tab ... project : chọn menu Project/Close Project. 2. Một số nguyên t c khi kết nối dữ liệu trong Project. • C c tập tin .H thường dùng để khai báo c c biến dữ liệu và hàm dùng chung (export data). C c ... hiện c a chúng chỉ khai báo một lần duy nhất trong tập tin .CPP tương ứng. • Tập tin project thường chứa c c tập tin c i đặt .CPP, thư viện đối tượng .OBJ, … • C c tập tin trong c ng một project...

Ngày tải lên: 22/08/2012, 09:26

... Bottom; }RECT; 2. C ch trình bày • Đầu mỗi chương trình hay tập tin đều c một số dòng mô tả. C c thông tin thường đề c p trong phần này thường là : tên tập tin, tóm tắt m c đích c a chương trình, ... lpEvent là biến kiểu con trỏ • Tên hàm : thường bắt đầu bằng một động từ. Thứ tự c c tham số trong hàm đư c qui ư c theo thứ tự : c c dữ liệu trả về, c c dữ liệu vào, … • Ví dụ : void CopyArray(int ... để thuận tiện cho vi c theo dõi chương trình, người ta thường thêm trư c tên biến một số kí tự viết thường để chỉ kiểu dữ liệu c a biến đó. C c kí tự thường đư c dùng trong qui ư c này thường...

Ngày tải lên: 05/09/2012, 15:09

... in comparisons with other characters. Certain characters can be represented in character and string constants by escape sequences like \n (newline); these sequences look like two characters, ... A character constant is an integer, written as one character within single quotes, such as 'x'. The value of a character constant is the numeric value of the character in the machine's ... delimit it. The same escape sequences used in character constants apply in strings; \" represents the double-quote character. String constants can be concatenated at compile time: "hello,...

Ngày tải lên: 14/11/2012, 17:10

... of objects absorb characteristics from existing classes –Objects • Encapsulate data and functions • Information hiding – Communicate across well-defined interfaces  2003 Prentice Hall, Inc. All ... cout instead of std::cout  2003 Prentice Hall, Inc. All rights reserved. 4 C+ + Standard Library C+ + programs – Built from pieces called classes and functions • C+ + standard library – Rich collections ... Prentice Hall, Inc. All rights reserved. 25 Introduction to Object Technology • User-defined types (classes, components) – Data members • Data components of class – Member functions • Function components...

Ngày tải lên: 25/04/2013, 19:12

Ngày tải lên: 13/09/2013, 09:23

... c = getchar(); the variable c contains the next character of input. The characters normally come from the keyboard; input from files is discussed in Chapter 7. The function putchar ... function putchar prints a character each time it is called: putchar (c) ; prints the contents of the integer variable c as a character, usually on the screen. Calls to putchar and printf may ... automatic henceforth to refer to these local variables. ( Chapter 4 discusses the static storage class, in which local variables do retain their values between calls.) Because automatic variables...

Ngày tải lên: 20/10/2013, 17:15

Ngày tải lên: 29/10/2013, 00:48

... PC http://www.senet.com.au/~cpeacock http://www.geocities.com/SiliconValley/Bay/8302/ Copyright February 1998 Craig Peacock. Any errors, ideas, criticisms or problems, please contact the author at cpeacock@senet.com.au Interfacing ... pin Centronics Connector found on most printers. IEEE 1284 Type C however, is a 36 conductor connector like the Centronics, but smaller. This connector is claimed to have a better clip latch, ... Interfacing the Standard Parallel Port http://www.senet.com.au/~cpeacock Interfacing the Standard Parallel Port Page 3 has power. 1284 Type C connectors are recommended for new designs, so we can...

Ngày tải lên: 12/12/2013, 04:15

... Turbo C+ + under MS-DOS Borland International makes a low-cost MS-DOS C+ + compiler called Turbo C+ +. This compiler will compile both C and C+ + code. We will describe only how to compile C code. ... their offerings is a C compiler called gcc. To compile a program using the gcc compiler use the following command line: % gcc -g -Wall -ohello hello .c The additional switch -Wall turns on the ... is: C: > bcc -ml -v -N -P -w -ehello hello .c The command-line options are the same for both Turbo C+ + and Borland C+ +. 2.3.3.5 Microsoft Visual C+ + Microsoft Visual C+ + is another C+ + /C compiler...

Ngày tải lên: 12/12/2013, 22:15

... Foundation's gcc compiler. For MS-DOS/Windows users, instructions are included for Borland C+ +, Turbo C+ +, and Microsoft Visual C+ +. (These compilers compile both C and C+ + code.) The book ... and Functions Scope and Class Functions Functions with No Parameters Structured Programming Recursion Answers Programming Exercises 10. C Preprocessor #define Statement Conditional ... to anyone who can send electronic mail to, and receive electronic mail from, Internet sites. Any company or service provider that allows email connections to the Internet can access FTPMAIL....

Ngày tải lên: 12/12/2013, 22:15

... Communications 305 A PC-to-PC Cable 305 Dos and Windows Tools 306 MS-DOS's Interlnk Direct Cable Connection A PC-to-PC Application 311 Appendices A  Resources 323 B  Microcontroller Circuit ... setting=_ Conflicting device list: I nterrupt Request 03 used by Communications Port (CCiM'2) Direct Memory Access 01 used by: Media Vision Thunder Board Select a port and click OK, or Cancel to ... Older Port Bidirectional 100 Cautions The Circuits The Changes 6 I nterfacing 105 Parallel Port Complete Port Variations 105 Drivers and Receivers Level 1 Devices Level 2 devices Interfacing Guidelines...

Ngày tải lên: 15/12/2013, 13:15

... the new, compact, 36-contact IEEE 1284 -C connec- tor described in Chapter 6. The connector on the computer is female, where the individual contacts are sock- ets, or receptacles. The cable has ... 36-contact connector as the Centronics connector, because it's the same type formerly used on Centronics printers. Other names are parallel- interface connector or just printer connector. IEEE ... other devices usually has a 50-contact connector, but some SCSI devices use a 25-con- tact D-sub that is identical to the parallel- port& apos;s connector. If you're unsure about which is the parallel- port...

Ngày tải lên: 15/12/2013, 13:15

... that accesses a parallel port is much like writing any application. Two programming topics that are especially relevant to paral- lel -port programming are where to place the code that communicates ... to a parallel port. The signal that controls the timing is BCLK. One BCLK cycle equals one T-cycle, and a normal read or write to a port takes six T-cycles. During T1, the CPU places the port ... Limits The circuits in the PC and peripheral are one limiting factor for port accesses. Bus speed The clock rate on the PC's expansion bus limits the speed of parallel- port accesses. This...

Ngày tải lên: 15/12/2013, 13:15

Ngày tải lên: 22/12/2013, 02:17