parallel port tester

COM means the serial port, while LPT (not the LTP) means the parallel port. The serial port is a port provided by the computer bus for data transmission. In the serial port, data is transmitted in a bitwise stream, LPT is another

(UInt16 i)//Delay Function{UCHAR8 J; for(; i>0; i--) for(j=0;j the; j + +) ;} Main () {SCON=0x00; EA=1;//Total interrupt allowedes=1;//allow serial total interruptsNsendbyte=1;//light data initialized to 0000 0001 fed into nsendbyteSbuf=nsendbyte;//write to Sbuf buffer to light data, start serial sendp1_0=0; while(1) { ; }}voidSerial_port () Interrupt4 using 0 { if(T1)//If the t1=1;1 byte is sent in a serial{p1_0=1;//that is 0x90=1;??? allow 74ls164 chip

With the continuous development of single-chip microcomputer applications, there are more and more multi-chip systems composed of multiple single-chip microcomputer, and information exchange between multiple single-chip microcomputer is a whole. The work of a single-chip microcomputer is divided into multiple single-chip microcomputer. On the one hand, the performance of the system can be improved, and on the other hand, the hardware design of the system can be simplified.Asynchronous serial por

PC parallel port register This article is excerpted from Wang honghui's book "Practical Guide for developing embedded Linux kernel (ARM platform )". On PCProgramAccess and control the pin signals of the parallel port by accessing the I/O port registers of the

Parallel port for short, it has 3 ports: Data port, State port, control port, commonly used and port is LPT1, its 3 ports address are: 378H, 379H and 37AH respectively. First, the same mouth read and write In assembly language,

C # Only the class for direct serial port operation is provided. If you operate the parallel port directly, you need to call the API function: Using system. runtime. interopservices; String senddata = "^ XA ^ fo50, 80 ^ ADN, 36,20 ^ fdtrw eol2 ^ FS ^ xz"; // zebra printer Command Format [Dllimport ("kernel32.dll")] Private Static extern int createfile ( String

control whether the data ports are high or low, the regular high/low level conversion constitutes a pulse signal, which can be directly output to the steering gear if properly controlled.LPT parallel pin definition: D0 ~ D7: data interface. The parallel port transmits one byte at a time. When the parallel

Debug windbg dual-host Kernel through the parallel port, windbgkernel Preface: Windows kernel mode debug is available in two ways: 1. windbg dual-host kernel debugging 2. traceview capture wpp log debugging This section describes how to use the parallel port for windbg dual-host kernel debugging. Preparation: 1.

7 parallel port service (parallel port service -- int 17 h) 00 h-output characters to the printer 01 H-initialize the printer port 02 h-read printer status (1) function 00 h Function Description: output characters to the printer Entry parameter: Ah = 00 h Al = output chara

Boot up an error window to view the Event Viewer. Found a red fork record: The Parallel port driver service failed to start because of the following error: The service could not be started because the device that has been disabled or associated with it has not started. "Don't know how to solve, search a bit, fix." Chongwen as follows: Some people say that finding system services can turn this off, but I sus

Boot up an error window to view the Event Viewer. Found a red fork record: The Parallel port driver service failed to start because of the following error: The service could not be started because the device that has been disabled or associated with it has not started. "Don't know how to solve, search a bit, fix." Chongwen as follows: Some people say that finding system services can turn this off, but I sus

static void Main (string[] args) { Console.WriteLine ("Please enter IP"); String ip = Console.ReadLine (); Parallel.For (1, 65535, i = Scan (IP, I, +)); Console.WriteLine ("Scan Complete"); } public static void Scan (string ip, int port, int timeout) { TcpClient tc = new TcpClient (); Tc. ReceiveTimeout = timeout; Try { TC

An error was recently found in the Event Viewer: "Parallel Port driver service failed to start due to the following error",I searched the internet for a bit and found that many of the pages said the solution:Put the Hkey_local_machine\system\controlset001\services\parport, change "start=3" to "start=0" canI just follow this method to operate a bit, and then restart the computer, but the result is: The compu

The following is an example of Telnet to port 22 Station91:~/shell/telnet_port # pwd /root/shell/telnet_port Station91:~/shell/telnet_port # Cat Telnet_port.sh #!/bin/bash RM telnet_result.txt >/dev/null 2>1 Port_22=22 For I in $ (cat ip.list) Do (telnet $i $PORT _22 >telnet_result.txt ) >/dev/null 2>1 #加 Let it execute in parallel, >>telnet_resul

C # parallel port thermal invoice printer print bitmap including chip writing, The following is the code to be called: Class LptControl {private string LptStr = "lpt1"; public LptControl (string l_LPT_Str) {LptStr = l_LPT_Str;} [StructLayout (LayoutKind. sequential)] private struct OVERLAPPED {int Internal; int InternalHigh; int Offset; int OffSetHigh; int hEvent;} // Call DLL. [DllImport ("kernel32.dll")

Monolithic microcomputer Internal structure analysis: In order to know how the delay program is working, we must first understand some of the symbols appearing in the delay program, starting from R1, R1 is called the work register. What is a work register? let's look for answers in real life. If a math problem: 123+567, let you answer the result is how much, you will immediately answer is 690, and then see the following topic: 123+567+562, to let you have to answer, it is not so easy? What are w