linux serial port programming c example

... 16 == 0)) { lcdcmd(0xC0); //NEW LINE lcddat(c); Trang 1916 lcdcmd(0x01); //CLEAR SCREEN c=""; continue; } if(c=='#'){continue;} if (i % 32 == 0) { lcdcmd(0x01); //CLEAR SCREEN } else ... Timers and Counters 4 10 Interrupts 4 11 Oscillator 5 12 I/O Ports 5 13 Serial Communication port 5 III PROGRAMMING COMPUTER COMMUNICATION VIA SERIAL PORT 6 1 Serial communication 6 2 ... and Data Communication Equipment (DCE) A COM port is simply an I/O interface that enables the connection of a serial device to a computer You may also hear COM ports referred to as serial ports

Ngày tải lên: 08/11/2022, 13:43

... register• SCON SFR used to control serial operationTIEU LUAN MOI download : skknchat123@gmail.com moi nhatPROGRAMMING COMPUTER COMMUNICATION VIA SERIAL PORTSerial communication- Serial communication ... download : skknchat123@gmail.com moi nhatCPUMicrocontroller 8051 has a central processing unit which is also called ALU (Arithmetic Logic Unit) which performs all arithmetic and logical operation.RAM ... thus enhancing communication efficiency and reliability.INTRODUCTION TO 8051ApplicationThe 8051 microcontroller has numerous important applications across various industries It plays a crucial role

Ngày tải lên: 08/11/2022, 16:02

... (i % 16 == 0)) { lcdcmd(0xC0); //NEW LINE lcddat(c); Trang 20lcdcmd(0x01); //CLEAR SCREENc="";continue; }if(c=='#'){continue;} if (i % 32 == 0) { lcdcmd(0x01); //CLEAR SCREEN} else if ((i ... status of 16x2 (write/change cursor/new line/ ) o VDD: connect to ground / VCC: connect to VCC (5V) / VEE: change the saturation of LCD • To communicate serially to 8051, we connect RXD on DP9 to ... 4 9 Timers and Counters 4 10 Interrupts 4 11 Oscillator 5 12 I/O Ports 5 13 Serial Communication port 5 III. PROGRAMMING COMPUTER COMMUNICATION VIA SERIAL PORT 6 1 Serial communication 6 2 Tranmission

Ngày tải lên: 07/12/2022, 09:51

... Trang 1Linux Socket Programming by ExampleWarren W Gay Part I: Basic Socket Concepts 6 Chapter 1 Introducing Sockets 7 A Brief Historical Introduction 7 Understanding Sockets 8 Comparing ... Socket Concepts Introducing Sockets Domains and Address Families Address Conversion Functions Socket Types and Protocols Binding Addresses to a Socket Connectionless-Oriented Protocols Connection-Oriented ... received If the local process closes its socket, this much will be accomplished However, if it needs to receive a confirmation from the remote end, it cannot, because its socket is now closed

Ngày tải lên: 12/08/2014, 21:20

... full coverage of all address families supported by Linux The list of supported protocols is growing longer with each new year If you are looking for a fast track to TCP/IP programming, you can ... ifconfig bpq0 hw ax25 VE3WWG-5 up Then, you can check the status of the interface, as shown in Listing 2.14 Listing 2.14 Checking the Interface Status of bpq0 # /sbin/ifconfig bpq0 Link encap:AMPR ... as follows: #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> unsigned long inet_addr(const char *string); This function accepts an input C string argument

Ngày tải lên: 12/08/2014, 21:20

... af_ipx.c: if(sock->type == SOCK_DGRAM ) af_spx.c: case SOCK_SEQPACKET: af_spx.c: if(sock->type != SOCK_SEQPACKET) Trang 14af_spx.c: if(sock->type != SOCK_SEQPACKET)af_spx.c: /* route ... SOCK_INODE(s->socket)->i_uid); af_ipx.c: case SOCK_DGRAM: af_ipx.c: case SOCK_SEQPACKET: af_ipx.c: case SOCK_STREAM: /* Allow higher levels to piggyback */ af_ipx.c: if(sock->type == SOCK_DGRAM) ... Family $ cd /usr/src/linux $ cd /net $ ls -F 802/ decnet/ netsyms.c socket.o Changes econet/ netsyms.o sunrpc/ Config.in ethernet/ network.a sysctl_net.c Makefile ipv4/ packet/ sysctl_net.o

Ngày tải lên: 12/08/2014, 21:20

... They are connection and connectionless modes of communication In the last chapter, you also saw how the UDP protocol could be used to communicate in a connectionless fashion In this chapter, ... is not used on the client's sending socket. What's Next This chapter introduced you to the concept of connectionless- and connection-oriented communication The UDP protocol was used to explore ... put the TCP/IP protocol to use, using a connection-oriented form of communication. This chapter will introduce you to • The advantages of connection-oriented protocols • The /etc/services file

Ngày tải lên: 12/08/2014, 21:20

... recall that a socket uses a file descriptor and that one socket is required for each connected client Server capacity is often restricted by the number of file descriptors that the server can ... standard I/O calls instead, because they will offer you the convenience of getting a line or character at a time, according to your application needs The read(2) call, for example, cannot return ... fdopen(3) call in this example established a stream for input and output After this open call has been successfully accomplished, the other standard I/O functions such as fgetc(3), for example, can

Ngày tải lên: 12/08/2014, 21:20

... client: > Trang 20gcc -c -D_GNU_SOURCE -Wall -Wreturn-type rpnsrv.cgcc -c -D_GNU_SOURCE -Wall -Wreturn-type rpneng.c gcc -c -D_GNU_SOURCE -Wall -Wreturn-type mkaddr.c gcc rpnsrv.o rpneng.o mkaddr.o ... the client. 3 Close its copy of the connected client's socket. 4 Repeat step 1. The servicing of the connected client is simple, because the server child process only has to worry about one connected ... because the parent server process simply accepts new connections The parent server process performs the following steps: 1 Accept a connection from a client. 2 Fork a new process to service

Ngày tải lên: 12/08/2014, 21:20

... broadcast IP address To compile this program, use the following command: $ make stksrv gcc -c -D_GNU_SOURCE -Wall -Wreturn-type -g stksrv.c gcc -c -D_GNU_SOURCE -Wall -Wreturn-type -g mkaddr.c gcc ... this concept, you can then apply the preceding procedure if it becomes necessary to broadcast out of every interface. Enhancing the mkaddr.c Subroutine One of the limitations of the mkaddr.c subprogram ... pending data and successful close occur before the timeout occurs, a successful return takes place Otherwise, an error return occur and errno is set to the value of EWOULDBLOCK. 3 Setting l_onoff

Ngày tải lên: 12/08/2014, 21:20

... Out-of-band data notifications arrive as exceptions for the select(2) function call You will recall in Chapter 11, "Concurrent Client Servers," that the select(2) call will block until one or ... field within the /etc/inetd.conf record is simply an Internet service name from the /etc/services file, which was covered in Chapter 7, "Connection-Oriented Protocols for Clients." Refer ... for example) This chapter will introduce you to • How the inetd daemon can be used with the TCP wrapper concept to provide screening of clients • How the TCP wrapper concept works • How the TCP

Ngày tải lên: 12/08/2014, 21:20

... by our example programs The recv_cred() function centralizes much of the work of receiving data and user credentials. Listing 17.4 recvcred.c— The recvcred.c source module 11: * s Socket to ... misc.c— The misc.c Module 9: * This function reports the error to 10: * the log file and calls exit(1). 11: */ Trang 24The recvcred.c ModuleListing 17.4 shows the source module recvcred.c, which ... cmsg_level=SOL_SOCKET SCM_RIGHTS The ancillary data object is a file descriptor. SCM_CREDENTIALS The ancillary data object is a structure containing credential information. Due to the complexity of structuring

Ngày tải lên: 12/08/2014, 21:20

... load.c Loads the stock market ticker symbols from file tickers.rc. misc.c Small miscellaneous functions. mkaddr.c The Internet address convenience function. mktwatch.c The market watch client ... msgf( 111: char type,const char *format,…); 112: extern int Connect(const... #include Linux Socket Programming by Example - Warren W Gay 488 int connect(int sockfd, struct sockaddr *serv_addr, ... Glossary Linux Socket Programming by Example - Warren W Gay 487 Index Appendix A Socket Function Quick Reference Socket- Specific Functions Socket Addressing Reading of Sockets Writing

Ngày tải lên: 12/08/2014, 21:20

... động cơ DC o gồm nam châm vĩnh cữu có từ thông không đ t vào phần ứng để thay đổi tốc độ động cơ n áp là điều chế độ rộng xung PWM ng trong các linh vực khác ng trong việc chế tạo các c sử dụng ... 35V, với dòng điện cực đại lên đến 2A Mô-đun này có hai nhóm chân cho động cơ A và B, và một chân ở giữa cho chân Ground, VCC cho động cơ và chân 5V có thể là đầu vào hoặc đầu ra Chân IN1, IN2 điều ... kết nối Serial port •Mạch cầu L293N: là trình điều khiển động cơ H-Bridge kép cho phép điều khiển tốc độ và hướng của hai động cơ DC cùng một lúc Mô-đun có thể điều khiển động cơ DC có điện

Ngày tải lên: 20/10/2021, 21:42

... – 485 M i PC có th có các d ng khác nhau c a các c ng ỗ ể ạ ủ ổ n i ti p nh USB, Firewire, và I2C nh ng chúng ố ế ư ư dùng các giao th c khác nhau và yêu c u các thành ứ ầ ph n khác nhau ầ Trang ... truy n cao qua cáp đều có chu n này T c truy n cao qua cáp ẩ ố độ ề c ng d ng v i các máy quét, các thi t b l u Trang 6không ng b đồ ộ đượ đ ềc i u khi n b i các ể ởUART M i c ng Com có th có giao ... n các thi t ề ừ ồ ồ ạ đế ế b không giây Giao di n này r t là có ích cho các liên ị ệ ấ Trang 4SERIAL PORTChu n MIDI( Musical instrument digital ẩ interface): giao di n s hóa các d ng c âm nh c

Ngày tải lên: 29/06/2014, 15:20

... Philips Corporation Trang 2PICmicro MID-RANGE MCU FAMILYThe Basic Synchronous Serial Port (BSSP) module is a serial interface useful for communicatingwith other peripheral or microcontroller devices ... Microchip Technology Inc DS31016A-page 16-5Section 16 BSSP 16 bit 3:0 SSPM3:SSPM0: Synchronous Serial Port Mode Select bits 0000 = SPI master mode, clock = FOSC/4 0001 = SPI master mode, clock ... FOSC/16 0010 = SPI master mode, clock = FOSC/64 0011 = SPI master mode, clock = TMR2 output/2 0100 = SPI slave mode, clock = SCK pin SS pin control enabled 0101 = SPI slave mode, clock = SCK

Ngày tải lên: 29/07/2014, 10:20

... it Example 3-42 Static state public class MyClassWithAStaticProperty Trang 37 // Create two objects MyClassWithAStaticProperty object1 = new MyClassWithAStaticProperty(); MyClassWithAStaticProperty ... write a specialconstructor that only runs once for the whole class We could add the constructor inExample 3-43 to our Plane class to illustrate this Example 3-43 Static constructor In case you’re ... visibleinside the class, unless you explicitly choose to make them more widely accessible.When different layers specify different protection, the effective accessibility is the low-est specified For example,

Ngày tải lên: 06/08/2014, 09:20

... do the quick check foreach( ActionCheckPair process in processes) { if (process.QuickCheck != null && !process.QuickCheck(doc)) Figure 5-3 Document processor with checking Trang ... Exam-Generic Actions with Action<T> | 157 Trang 17Example 5-13 Adding quick checking to the document processorclass DocumentProcessor { class ActionCheckPair { public Action<Document> Action ... public Check QuickCheck { get; set; } } private readonly List<ActionCheckPair> processes = new List<ActionCheckPair>(); public void AddProcess(Action<Document> action)

Ngày tải lên: 06/08/2014, 09:20

... that case Without thischeck, our code would crash with a NullReferenceException if null were passed tobe-CompareTo Example 7-17 Making a type comparable class CalendarEvent : IComparable<CalendarEvent> ... the spellchecker in Word) and that rectangular was more usefully descriptive, despite not being technically correct Pragmatism beat pedantry here because C# is fundamentally a practical language. ... subtle difference between array element access and list element access thatcan cause problems with custom value types (structs) You may recall that Chapter 3warned that when writing a custom value

Ngày tải lên: 06/08/2014, 09:20

... You can also create a CultureInfo object for a specific culture, by providing that ture’s canonical name to the CreateSpecificCulture method on the CultureInfo object.But what are the canonical ... the C to indicate the number of decimal places we want to use, as Example 10-8 shows Example 10-8 Specifying decimal places with currency format Trang 12This will produce three decimal places ... data they’ve not touched lately.CPUs have caches that provide faster access to data than a computer’s main memorycan support, and these caches typically operate a policy where recently used data

Ngày tải lên: 06/08/2014, 09:20