windows serial port programming example c
Serial port programming for Windows and Linux
Ngày tải lên :
05/11/2013, 20:15
... initialized
DCB object using the function SetCommState().
3. Set the size of the serial port read and write
buffers using SetupComm().
Code to accomplish this can be found below.
DCB dcb; //create the dcb
//first, ... 2003
Abstract
While devices that use RS−232 and the serial port to
communicate are becoming increasingly rare, it is still
an important skill to have. Serial port programming,
at its most basic level, consists ... to be changed
//CREAD says to enable the receiver
options .c_ cflag |= (CLOCAL | CREAD);
//apply the settings to the serial port
//TCSNOW means apply the changes now
//other valid options include:
//...
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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. ... system’s CPU. Any PC with a free expansion slot can add this type of
port on an expansion card.
ã RS-232 ports on PC Cards (also called PCMCIA cards). Any PC with a free
PC-Card slot can use these.
ã ... 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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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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Tài liệu chương 5: Hoạt động của port nối tiếp (Serial Port) pptx
Ngày tải lên :
20/01/2014, 19:20
... Xóa c ngắt thu (RI=0)
⇒
Vi c thu dữ
liệu bắt ñầu: C c xung clock dịch bit ñư c gởi ra chân TxD và dữ liệu từ thiết bị bên ngoài
ñư c dịch vào chân RxD bởi c c xung clock dịch bit này (vi c ...
SM0: Serial Mode 0
Bit 0 chọn chế độ c a port noái tieáp.
C c chế ñộ c a port nối tiếp:
Trư c khi sử dụng port nối tiếp c n phải:
Chương 5: Hoạt ñộng c a port nối tiếp (Serial Port) . ... KHIỂN PORT NỐI TIẾP (SCON):
Thanh ghi SCON (Serial Control Register): chứa c c bit dùng ñể ñiều khiển chế ñộ hoạt ñộng
và báo trạng thái c a port nối tiếp.
C u tr c của thanh ghi SCON:
SCON: Serial...
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VHDL Programming by Example 4th Edition
Ngày tải lên :
16/08/2012, 08:46
... 183
Generics in Configurations 185
Generic Value Specification in Architecture 188
Generic Specifications in Configurations 190
Board-Socket-Chip Analogy 195
Block Configurations 199
Architecture Configurations ...
mux
device. There is an inverter component, an
andgate
component and an
orgate
component. Each of these components is declared
in the architecture declaration section, which is between the architecture
statement ... std_logic);
END test;
ARCHITECTURE test_arch OF test IS
COMPONENT and2
GENERIC(rise, fall : TIME := 10 NS;
GENERIC(load : INTEGER := 0);
PORT ( a, b : IN std_logic;
PORT ( c : OUT std_logic);
END COMPONENT;
BEGIN
U1:...
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Foreword và Predace của VHDL Programming by Example 4th Edition_01
Ngày tải lên :
29/09/2013, 19:20
... description capability of
VHDL. Chapter 1 discusses how VHDL design relates to schematic based
design, and introduces the basic terms of the language. Chapter 2 describes
some of the basic concepts ... advanced VHDL
features to the reader. Chapter 7 discusses how VHDL configurations
can be used to construct and manage complex VHDL designs. Each of
the different configuration styles are discussed ... VHDL, including the different delay mecha-
nisms available, how to use instance specific data, and defines VHDL dri-
vers. Chapter 2 discusses concurrent statements while Chapter 3 introduces
the...
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Programming Serial and Parallel Ports
Ngày tải lên :
27/10/2013, 14:15
... ");
switch (thePortID.getPortType()) {
case CommPortIdentifier .PORT _SERIAL:
thePort = thePortID.open("DarwinSys DataComm",
TIMEOUTSECONDS * 1000);
SerialPort myPort = (SerialPort) thePort;
Example ... {
new CommPortOpen(null).converse();
System.exit(0);
}
/* Constructor */
public CommPortOpen(Frame f)
throws IOException, NoSuchPortException, PortInUseException,
UnsupportedCommOperationException ... */
CommPortIdentifier thePortID;
/** The chosen Port itself */
CommPort thePort;
public static void main(String[] argv)
throws IOException, NoSuchPortException, PortInUseException,
UnsupportedCommOperationException...
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Web Client Programming with Perl-Chapter 6: Example LWP Programs-P1
Ngày tải lên :
28/10/2013, 15:15
... different resource in a predictable
manner. For example, a client may request 0100.gif at 1 a.m., 0200.gif
at 2 a.m, etc. A periodic client might check some data and perform
action when a condition ...
$opt _c )) {
print_help( );
exit(0);
}
#
my $tracker = new FedEx $cgi, $opt_e, $opt_ p;
my $keep_checking = 1;
First, we declare local variables, call all necessary modules, get command-
line ... reviewed the important parts of the FedEx package, let's
take a look at the complete example. Note how one creates a FedEx object
and calls it. We'll come back to this example and redo...
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Web Client Programming with Perl-Chapter 6: Example LWP Programs-P2
Ngày tải lên :
28/10/2013, 15:15
... we keep track of which documents don't exist,
what their content types are, which ones are local to the web server, which
are not local, and which are not HTTP-based. After scan( ) finishes, ... extracted from that page and
pushed on the queue. To keep track of which URLs have already been
visited (and not to push them back onto the queue), we use an associative
array called %touched ... associate any URL that has been visited with a
value of 1. There are other useful variables that are also used, to track which
document points to what, the content-type of the document, which...
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Programming the Parallel Port
Ngày tải lên :
04/11/2013, 18:15
... 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:
ã The digital circuit...
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Tài liệu Programming Microsoft Windows with C# pptx
Ngày tải lên :
10/12/2013, 14:16
... 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 ... output.
ConsoleAdder.cs
//
// ConsoleAdder.cs â 2001 by Charles Petzold
Chapter 1: Console Thyself
Overview
In that succinct and (perhaps consequently) much-beloved classic tutorial The C Programming ...
version of the program.
CsDateConstructors.cs
//
// CsDateConstructors.cs â 2001 by Charles Petzold
//
using System;
class CsDateConstructors
{
public static void Main()
{
try
...
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Tài liệu Windows PowerShell Programming P2 pptx
Ngày tải lên :
13/12/2013, 02:16
... Page 24
Chapter 2: Extending Windows PowerShell
public override Collection
<
CmdletConfigurationEntry
>
Cmdlets
{
get
{
if (cmdlets == null)
{
cmdlets = new Collection
<
CmdletConfigurationEntry
>
();
cmdlets.Add(
new ... this location:
C:
\
Windows
\
Microsoft.NET
\
Framework64
\
v2.0.50727
\
csc.exe
C:
\
Windows
\
Microsoft.NET
\
Framework64
\
v2.0.50727
\
installutil.exe
The path to
csc.exe
on your machine could ... implement cmdlet Write-Hi
[Cmdlet(VerbsCommunications.Write, "Hi")]
public class SayHi : Cmdlet
{
protected override void ProcessRecord()
{
WriteObject("Hi, World!");
}
}
// Code...
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Tài liệu Windows PowerShell Programming P1 ppt
Ngày tải lên :
13/12/2013, 02:16
... [
Cmdlet Get-PSSnapin Get-PSSnapin [[-
Cmdlet Get-Runspace Get-Runspace [[-
Cmdlet Get-Service Get-Service [[-N
Cmdlet Get-TraceSource Get-TraceSource
Cmdlet Get-UICulture Get-UICulture [-
Cmdlet ... Get-ItemProperty
Cmdlet Get-Location Get-Location [-P
Cmdlet Get-Member Get-Member [[-Na
Cmdlet Get-PfxCertificate Get-PfxCertifica
Cmdlet Get-Process Get-Process [[-N
Cmdlet Get-PSDrive Get-PSDrive [[-N
Cmdlet ... 29
PSObject 29
Constructing a PSObject 30
PSObject(Object) 31
PSObject() 31
PSObject.AsPSObject(someObject) 32
ImmediateBaseObject and BaseObject 33
Members 34
PSMemberInfoCollection 35
ReadOnlyPSMemberInfoCollection...
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Tài liệu Programming by Example docx
Ngày tải lên :
19/01/2014, 09:20
... 2-6. This circuit could be part of
a clocking scheme in a complex device being modeled. It probably would
not be the entire circuit, but only a part of the circuit used to generate
the clock to the ... FOR;
END muxcon1;
The function of the configuration statement is to spell out exactly
which architecture to use for every component instance in the model. This
occurs in a hierarchical fashion. ... description capability of
VHDL. Chapter 1 discusses how VHDL design relates to schematic based
design, and introduces the basic terms of the language. Chapter 2 describes
some of the basic concepts...
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Tài liệu Parallel Port Complete: Programming, Interfacing, & Using the PC''''s Parallel Printer Port ppt
Ngày tải lên :
22/01/2014, 11:20
... autorrnatic 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 ... OK,
or
Cancel
to make no changes.
Cancel
Figure 1-1: In Windows 95, you can select a port configuration in the Device
Manager's Resources Window. A message warns if Windows detects any system
conflicts ... 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...
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