serial port programming using c linux
Serial port programming for Windows and Linux
... the serial port requires three steps. 1. Create a DCB object and initialize it using the function BuildCommDCB(). 2. Set the serial port settings using the initialized DCB object using the function ... each operating system. The actual application can then use the common header file as its interface to the serial port. This creates a cross-platform serial inter- face allowing the creation of code ... { //error code goes here } 3.4.2 Linux Closing the serial port on Linux involves a single call to the close() system function, as the following code demonstrates. //close the serial port if(close(fd)...
Ngày tải lên: 05/11/2013, 20:15
Tài liệu Linux IO Port Programming pptx
... of clock cycles taken; e.g., for a 50 MHz processor (e.g. 486DX−50 or 486DX2−50), one clock cycle takes 1/50000000 seconds (=200 nanoseconds). Instruction i386 clock cycles i486 clock cycles xchg ... 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): ... For more accurate times, gettimeofday() is accurate to about a microsecond (but see above about scheduling). For Pentiums, the rdtsc code fragment above is accurate to one clock cycle. If you...
Ngày tải lên: 22/12/2013, 10:15
Programming Fundamentals - A Modular Structured Approach using C++ docx
Ngày tải lên: 08/03/2014, 11:20
Kenneth leroy busbee programming fundamentals a modular structured approach using c++
Ngày tải lên: 19/03/2014, 14:10
Questions to .NET and Programming in C#
... static constructor for a class is called automatically when the object is accessed. c) A static constructor can have public as a accessibility modifiers 74. class A { public static ... Static constructors can be called explicitly or implicitly. b) Static constructors can have accessibility modifiers. e) Static constructors are called when the class is loaded. c) ... “Object” that is used to create an object? a) void object(){} c) Object Object(){} b) object(){} d) Object(){} 70. Which of the following methods can act as a constructor for the class...
Ngày tải lên: 21/08/2012, 15:55
Questions to .NET and Programming in C#
... implementing an abstract class. [1.0] a) public abstract void class ClassA c) abstract public ClassA b) public abstract class ClassA 105. Which of the following methods can be called as an “operation”? ... class can be invoked. 193. using System.Reflection; using System; class Reflect { public int i=20; public char ch='a'; public float f1=10; public void GetFloat(){ Console.WriteLine(f1); ... Space1.MyClass() c) Space1.Space2.MyCl ass() b) Space2.MyClass() d) Space2.Space1.MyCla ss() 141. namespace College.Library{ namespace Shelf{ class Book{ } } } The fully qualified name of class...
Ngày tải lên: 29/08/2012, 16:37
Question Bank Introduction to .NET and Programming in C#
... the object is accessed. c) A static constructor can have public as a accessibility modifiers 74. class A { public static int X = B.Y + 1; } class B { public static int Y = A.X + 1; static void ... initialize a class. d) A static constructor cannot have accessibility modifiers. b) Static constructors may or may not take parameters. e) A static constructor for a class is called automatically ... Static constructors ? [2.0] a) A constructor-declaration may include a set of attributes. d) A class has no other constructors than those that are actually declared in the class b) A constructor-declaration...
Ngày tải lên: 09/04/2013, 09:10
6.087: Practical Programming in C
... space characters. 5 main .c: dict .c: dict.h: #include <stdio.h> #include "dict.h" /* data structure #include <stdlib.h> for the dictionary */ #include "dict.h" ... other source file and still be able to access or modify the dictionary directly. In order to prevent direct access, the dictionary should be declared with the static keyword in dict .c. (c) Congratulations! ... to compile your code. Write the command line that you should use to compile this code (using gcc). Let’s call the desired output program dictionary.o. Answer: gcc -g -O0 -Wall main .c dict.c...
Ngày tải lên: 25/04/2013, 08:07
DSP applications using C and the TMS320C6X DSK (P3)
... 3.5 cover the essential background for this project. Support files for this project include factclasm .c, factclasmfunc.sa, vectors, rts6701.lib, and C6 xdsk.cmd. Build and run this project as fact- clasm. ... find the factorial of a number (factorial .c) . ;Factfunc.asm Assembly function called from C to find factorial .def _factfunc ;asm function called from C _factfunc: MV A4,A1 ;setup loop count in ... 1.3. Example 3.6: Factorial Using C Calling a Linear Assembly Function (factclasm) Figure 3.18 shows a listing of the C program factclasm .c, which calls the linear ASM function factclasmfunc.sa (Figure...
Ngày tải lên: 17/10/2013, 19:15
DSP applications using C and the TMS320C6X DSK (P4)
... with C Program Calling ASM Function Using Circular Buffer (FIRcirc) The C program FIRcirc .c (Figure 4.33) calls the ASM function FIRcirc- func.asm (Figure 4.34), which implements an FIR filter using ... Nyquist frequency and (4.41) Since the impulse response coefficients h i = C Q-i , C n = C -n , and Q = 5, the impulse response coefficients are (4.42) These coefficients can be calculated with a ... Response Filters ;FIRCASMfuncfast.asm C- called faster function to implement FIR .def _fircasmfunc _fircasmfunc: ;ASM function called from C MV A6,A1 ;setup loop count MPY A6,2,A6 ;since dly buffer data...
Ngày tải lên: 24/10/2013, 09:15
Database Programming with C#
... the modification has occurred. However, this doesn’t mean that a change can’t be rolled back, because the trigger has direct access to the modified row and as such can roll back any modification. ... the connection 23 cnnUserMan = new SqlConnection(STR_CONNECTION_STRING); 24 cnnUserMan.Open(); 25 26 // Instantiate and initialize command 27 cmmUser = new SqlCommand(“SELECT * FROM viwUser”, cnnUserMan); 28 ... constraint in some situations, because a trigger can access columns in other tables, unlike a constraint, which can only access columns in the current table or row. If your code is to handle your business...
Ngày tải lên: 27/10/2013, 07:15
DSP applications using C and the TMS320C6X DSK (P5)
... Applications Using C and the TMS32 0C6 x DSK. Rulph Chassaing Copyright â 2002 John Wiley & Sons, Inc. ISBNs: 0-471-20754-3 (Hardback); 0-471-22112-0 (Electronic) Programming Examples Using C Code 175 //two_tones .c ... () = - = - ÂÂ 0 1 1 1 Hz az bz i i i N j j j M () = - = - - = - Â Â 0 1 1 1 Programming Examples Using C Code 179 H 2 (z), can be either first- or second-order functions. As with the cascade struc- ture, the parallel form can be efficiently represented in terms of second-order ... or second-order transfer functions. The cascade (or series) struc- ture is shown in Figure 5.4. An overall transfer function can be represented with cascaded transfer functions. For each section,...
Ngày tải lên: 28/10/2013, 16:15