serial port programming using c linux
Serial port programming for Windows and Linux
Ngày tải lên :
05/11/2013, 20:15
... 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)...
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Tài liệu Linux IO Port Programming pptx
Ngày tải lên :
22/12/2013, 10:15
... 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...
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Questions to .NET and Programming in C#
Ngày tải lên :
21/08/2012, 15:55
... 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...
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Questions to .NET and Programming in C#
Ngày tải lên :
29/08/2012, 16:37
... 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...
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Question Bank Introduction to .NET and Programming in C#
Ngày tải lên :
09/04/2013, 09:10
... 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...
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6.087: Practical Programming in C
Ngày tải lên :
25/04/2013, 08:07
... 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...
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DSP applications using C and the TMS320C6X DSK (P3)
Ngày tải lên :
17/10/2013, 19:15
... 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...
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DSP applications using C and the TMS320C6X DSK (P4)
Ngày tải lên :
24/10/2013, 09:15
... 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...
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Database Programming with C#
Ngày tải lên :
27/10/2013, 07:15
... 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...
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DSP applications using C and the TMS320C6X DSK (P5)
Ngày tải lên :
28/10/2013, 16:15
... 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 ...
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0
1
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1
Hz
az
bz
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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,...
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Serial Port Complete
Ngày tải lên :
06/11/2013, 08:15
... Framework class library can use the SerialPort class to
access COM ports. Some USB devices function as virtual COM ports, which
applications can access in the same way as physical serial ports. ... is typi-
Chapter 2
20
Software uses the code point to obtain the encoded character, which represents
a character using a specific coding method. The code point and encoded char-
acter can have ... networks.
On PCs, ports that applications can access as COM ports include these:
ã RS-232 ports on older motherboards or on expansion cards.
ã Ports that connect to a PC via a USB converter that...
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