serial port communication in linux using c
Serial port programming for Windows and Linux
Ngày tải lên :
05/11/2013, 20:15
... needed.
3.2.1 Windows
In Windows, setting up 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 ... that contains the functions necessary to success-
fully communicate with the serial port. With a single
header file that contains all the functions necessary to
communicate over a serial port, ... 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,...
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The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System
Ngày tải lên :
12/09/2012, 15:05
... that task.
3.2. Inter-Process Communication
Inter-process communication (IPC) in Mach is defined in terms of ports and messages. These constructs provide
for location independence, security and data ... to accommodate large numbers of communicating
processors, they add the characteristic NUMA remote memory access delay. The difficulties in keeping cache
contents consistent through such switches ... a time cost greater than that
for local memory access. The typical CPU-to-CPU interconnect is a communication switch with several levels of
internal switching nodes. While such switches can be...
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Writing device drivers in Linux: A brief tutorial
Ngày tải lên :
23/10/2013, 22:15
... application: flashing lights 18
#include < ;linux/ init.h>
#include < ;linux/ config.h>
#include < ;linux/ module.h>
#include < ;linux/ kernel.h> /* printk() */
#include < ;linux/ slab.h> ... < ;linux/ errno.h> /* error codes */
#include < ;linux/ types.h> /* size_t */
#include < ;linux/ proc_fs.h>
#include < ;linux/ fcntl.h> /* O_ACCMODE */
#include < ;linux/ ioport.h>
#include <asm/system.h> ... < ;linux/ config.h>
#include < ;linux/ module.h>
#include < ;linux/ kernel.h> /* printk() */
#include < ;linux/ slab.h> /* kmalloc() */
#include < ;linux/ fs.h> /* everything */
#include < ;linux/ errno.h>...
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Serial Port Complete
Ngày tải lên :
06/11/2013, 08:15
... 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 ... you’re interested
in a particular topic, you can skip right to it.
The first chapters focus on hardware and interfacing. Chapters 1–2 are an
introduction to asynchronous serial communications. Chapter ... codes are defined in the Unicode code chart
C0
Controls and Basic Latin
.
For characters with code points of 80h and higher, UTF-8 uses multi-byte
encodings of 2 to 4 code units each. If a code...
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Tài liệu Writing device drivers in Linux: A brief tutorial docx
Ngày tải lên :
13/12/2013, 11:15
... more #include lines are added: ioport.h and io.h.
<parlelport initial> =
/* Necessary includes for drivers */
#include < ;linux/ init.h>
#include < ;linux/ config.h>
#include < ;linux/ module.h>
#include ... < ;linux/ kernel.h> /* printk() */
#include < ;linux/ slab.h> /* kmalloc() */
#include < ;linux/ fs.h> /* everything */
#include < ;linux/ errno.h> /* error codes */
#include < ;linux/ types.h> ... =
Writing device drivers in Linux: A brief tutorial
The “memory” driver: removing the driver 7
#include < ;linux/ init.h>
#include < ;linux/ config.h>
#include < ;linux/ module.h>
#include...
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Tài liệu Adding Users in Linux pdf
Ngày tải lên :
21/12/2013, 19:15
... Instructor,
Windows
Computer
B2 studentB2 studentB2
B3 studentB3 studentB3
B4 studentB4 studentB4
C1 instructorC1 instructorC1 Instructor,
Linux Computer
C2 studentC2 studentC2
C3 studentC3 ... Systems, Inc.
Lab 10.2.2: Adding Users in Linux
Estimated Time: 20 minutes
Objective
In this lab, the student will learn how to create user accounts using the Linux Red Hat 7.X
operating system. ... verify that the accounts were created correctly in step 4 by using the finger
command.
To learn about the finger command type:
man finger
Experiment with the finger command, type:
finger root...
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Tài liệu COMMUNICATION IN LANGUAGE AND CULTURE doc
Ngày tải lên :
16/01/2014, 23:20
... Disability Resource Center (SDRC) and 2) bring a letter to the
instructor from the SDRC indicating that the student needs academic
accommodation and specifying the type(s) of accommodation needed. ... in Spanish, discuss contributions made by Spanish-speaking
peoples to literature, art, music, performance, science, and commerce, and
talk critically about historical events that deal directly ... on a scale of 100% by five
(5) percentage points. Excused absences include the following: (a)
participation in a scheduled event as a member of a university-sponsored
athletic/scholastic team...
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Tài liệu Creating Groups in Linux docx
Ngày tải lên :
18/01/2014, 05:20
... Eng directory is the root user. The group is called Engineer
because Linux can only display eight characters, otherwise Engineering would appear.
Both the root account and the Engineering group ... grep command:
grep Engineers /etc/group
Troubleshooting
To create accounts in Linux, the user must be logged onto the server as the root user. If
problems are encountered while creating these ... creating these accounts, verify that the user has the
necessary administrative privileges by logging off of the server and logging on again
using the root account.
Reflection
Why is it important...
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Tài liệu Creating Directories in Linux pdf
Ngày tải lên :
18/01/2014, 05:20
... screen.
2. Next, create another directory in the chemistry directory, type:
cd chemistry
This will change the current working directory to the chemistry directory. From the
chemistry directory, ... Lab 10.3.1 Copyright 2002, Cisco Systems, Inc.
Step 3: Creating Directories
1. The following command sequence will not work unless the user is in the home
directory. Type:
cd
Verify that ...
cd
Verify that the user is in the home directory by using the pwd command. Next, create the
directory structure by typing in the following command:
mkdir –p chemistry/experiments/week3
Example...
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Tài liệu Configuring FTP Services in Linux ppt
Ngày tải lên :
18/01/2014, 05:20
... 10.4.4 Copyright 2002, Cisco Systems, Inc.
Lab 10.4.4: Configuring FTP Services in Linux
Estimated Time: 25 minutes
Objective
In this lab, the student will configure a Linux Red Hat 7.2 computer ... 2002, Cisco Systems, Inc.
/etc/rc.d/init.d/xinetd start
3. Check the status of the xinetd daemon:
/etc/rc.d/init.d/xinetd status
In the space below, write down the status of the xinetd ... anymore.
If having difficulties with the Linux FTP client, try a windows computer. A Windows
system can easily connect to a Linux FTP server by using a popular program called
WS_FTP. If familiar...
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Tài liệu Configuring Telnet in Linux ppt
Ngày tải lên :
18/01/2014, 05:20
... 10.4.5 Copyright 2002, Cisco Systems, Inc.
Troubleshooting
Configuring services like Telnet for a Linux operating system can be somewhat confusing
to the inexperienced user. Editing the configuration ... the command prompt, type:
/etc/rc.d/init.d/xinetd stop
2. Next, start the xinetd daemon:
/etc/rc.d/init.d/xinetd start
3. Check the status of the xinetd daemon:
/etc/rc.d/init.d/xinetd ... 10.4.5 Copyright 2002, Cisco Systems, Inc.
Lab 10.4.5: Configuring Telnet in Linux
Estimated Time: 25 Minutes
Objective
In this lab, the student will learn how to configure Telnet services...
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Tài liệu Writing a Script File in Linux pptx
Ngày tải lên :
18/01/2014, 05:20
... executable? How can this be verified?
1 - 4 IT Essentials II v2.0 - Lab 10.4.10 Copyright 2002, Cisco Systems, Inc.
Lab 10.4.10: Writing a Script File in Linux
Estimated Time: 25 minutes ... A lab computer with Linux installed and running.
Scenario
The members of the Engineering Department are working on some important documents
that need to be backed up frequently. This involves ... Lab 10.4.10 Copyright 2002, Cisco Systems, Inc.
_______________________________________________________________
Step 3: Executing the Script
1. At the command prompt, execute the script:
...
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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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Tài liệu Parallel Port Complete: Programming, Interfacing, & Using the PC''''s Parallel Printer Port ppt
Ngày tải lên :
22/01/2014, 11:20
... access
ports.
LPT Access in Visual Basic
Accessing Ports
Although Visual Basic has no built -in ability for simple port I/O
it
does include
ways to access LPT ports, including the
Printer object, the
PrintForm
method, ... 4
Addressing
Interrupts
DMA Channels
Finding Existing Ports
Configuring 6
Port Options
Drivers
Adding a Port
Port Hardware 9
Connectors
The Circuits Inside
Cables
Multiple Uses for One Port 11
Security ... 203
Definitions
Communication modes
Detecting Port Types 207
Using the New Modes
Port Detecting in Software
Disabling the Advanced Modes
Negotiating a Mode 210
Protocol
Controller Chips 212
Host Chips
Peripheral...
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Tài liệu Checking Resource Usage in Linux pptx
Ngày tải lên :
24/01/2014, 19:20
... 11.4.6 Copyright 2002, Cisco Systems, Inc.
4. In the space below, write in information determined from the top output:
CPU idle time in %
Number of users
Number of processes
Number of processes ... directory?
7. The du command can useful in determining the size of any directory or file within a
directory. To go to the /etc directory and determine the size of the directory and the
size ... within the studentA5 home directory, type:
du
Next type:
du –hs
What is the difference in the commands when the –hs switches are added? How
much space is being used in studentA5’s home directory?...
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