barcode reader application in asp.net SIMULATE YOUR APPLICATION in Software

Drawer QR in Software SIMULATE YOUR APPLICATION

SIMULATE YOUR APPLICATION
QR Code Scanner In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code JIS X 0510 Creation In None
Using Barcode creator for Software Control to generate, create QR-Code image in Software applications.
Simulation of the application code should be done twice in the debugging of a problem with the application. The rst time is when you characterize the problem. This process is repeated in order to con rm that the problem was xed. The simulator will help you
QR Code ISO/IEC18004 Reader In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Print QR-Code In Visual C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create QR Code image in Visual Studio .NET applications.
DEBUGGING YOUR APPLICATIONS
Make QR Code JIS X 0510 In Visual Studio .NET
Using Barcode creation for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
QR Creation In VS .NET
Using Barcode maker for VS .NET Control to generate, create QR image in VS .NET applications.
to close the failure analysis circle and will provide you with a tool that will allow you to see the problem in operation as well as the x to ensure that it addresses the original problem properly and doesn t cause any new ones on its own. As will be shown in this section, the simulator can be used to characterize the errors, help you to develop hypotheses as to the cause of the problem, along with different corrective actions, and nally help you to verify that the x does indeed work correctly. An aspect of simulating an application is deciding where to put breakpoints. By ef ciently selecting where a breakpoint is placed, errors can be observed quickly and with a minimum of overhead. I nd that correctly placing breakpoints is something of an art, with the goal of placing breakpoints in such a way that problems are identi ed quickly. Once the problem has been found, the same breakpoints can be used to con rm that the x has been made before another PIC microcontroller is burned with the corrected code. Problems that can affect the placement of breakpoints are interrupt handlers, subroutines, and macros. Subroutines and interrupts are a problem because they generally execute multiple times, and their execution can be part of the failure mechanism of the application. A good example of this is a bit banging UART serial receiver that polls an input line three times per bit period. In the example interrupt handler presented below, when a character is received, data is passed to the mainline without any problem, but it is always followed by the byte 0xFF, or if a byte immediately follows it, it is in error:
Creating QR Code In Visual Basic .NET
Using Barcode creation for .NET framework Control to generate, create QR Code image in .NET applications.
UPC-A Supplement 5 Maker In None
Using Barcode generation for Software Control to generate, create UPC A image in Software applications.
interrupt serin() { // // 3x Sample USART Serial Input Processor
Code128 Creation In None
Using Barcode drawer for Software Control to generate, create Code 128 image in Software applications.
Data Matrix 2d Barcode Creation In None
Using Barcode generator for Software Control to generate, create ECC200 image in Software applications.
TMRO = 1/3 bit; // Reset the Interrupt INTCON = 1 << TOIE; switch (Rx state) { case 0: // Nothing Active if (SerialInput == 0) // Check for Start Bit RXState = 1; // Set up Byte Read case 1: // Con rm Start Bit RXState = 2; BitCount = 8; // Read in 8 bits BitDelay = 3; // Delay 3 Interrupts per bit break; case 2: // Check a Bit For Valid BitDelay = BitDelay 1; if (BitDelay == 0) { // Save the bit RXData = (RXData << 1) + SerialInput; BitDelay = 3; BitCount = BitCount 1; if (BitCount == 0) { // Eight Bits Read in DataAvailable = 1; // Yes RXState = 0; // Restart the polling }
Barcode Maker In None
Using Barcode encoder for Software Control to generate, create barcode image in Software applications.
Create Bar Code In None
Using Barcode encoder for Software Control to generate, create bar code image in Software applications.
TEST FIXES
Create MSI Plessey In None
Using Barcode maker for Software Control to generate, create MSI Plessey image in Software applications.
Encoding GS1 128 In None
Using Barcode generation for Font Control to generate, create EAN / UCC - 13 image in Font applications.
} break; } // end switch } // end serin
EAN-13 Generation In Java
Using Barcode encoder for Android Control to generate, create GS1 - 13 image in Android applications.
DataMatrix Scanner In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
When you walk through the code manually, it seems to be good and should not have any problems. To understand the problem, you can create a stimulus le with incoming data and then try to look for the problem. The rst place to look is in the mainline code to see if you can repeat the problem. Chances are that you have a mainline poll of the bit banging RS-232 interface that looks like
Painting EAN13 In Java
Using Barcode printer for Java Control to generate, create EAN-13 Supplement 5 image in Java applications.
Draw 2D Barcode In .NET
Using Barcode maker for ASP.NET Control to generate, create Matrix 2D Barcode image in ASP.NET applications.
while (1 == 1) { while (DataAvailable == 0); byte o/p DataByte = RXData; DataAvailable = 0; : } // end while forever // Loop For Each Incoming Character // // // // Wait for ag to indicate a new Save Input Byte Reset Flag Process Data
UCC-128 Creation In VS .NET
Using Barcode creator for Reporting Service Control to generate, create EAN / UCC - 13 image in Reporting Service applications.
Generate Barcode In Java
Using Barcode drawer for Java Control to generate, create bar code image in Java applications.
A breakpoint could be put at the
DataByte = RXData;
statement, and you could single-step through it to see the data in RXData to con rm the problem. In a case like this, I would suggest that you put a breakpoint at the start of the serin interrupt handler and start single-stepping through the code to see what happens during the good data save. I placed the breakpoint at the RXState = 1 statement which executes when the incoming data goes low, indicating a start bit. After moving to state 1 in the next TMR0 over ow, the interrupt handler will move on and receive the next 8 bits properly. This can be shown graphically as Fig. 14.1. The three times sample bit banging receive works to place the sample as close to the middle of a bit as possible. This is done by waiting one one-third bit interrupt period after a low start bit is found. Unfortunately in this case, if bit 7 is a 0 (which is the case for ASCII characters), then the next three times bit sample will detect the still-low bit and start reading what is interpreted as a new data packet coming in. There are a number of different ways to x this depending on the applications requirements. Probably the simplest way is to add a glitch detect in state 1 of the serin interrupt handler:
case 1: if (SerialInput == 0) RXState = 0;
// //
Copyright © OnBarcode.com . All rights reserved.