barcode reader asp.net web application PROJECTS in Software

Maker Quick Response Code in Software PROJECTS

PROJECTS
QR-Code Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Paint QR Code JIS X 0510 In None
Using Barcode generation for Software Control to generate, create QR image in Software applications.
You also will see that I put the serial input and LCD output code in two different pages in the source code. The reason for doing this was that there was not enough space for both to reside in the same page. Even though the actual application is just a few instructions longer than 512 (the low-end PIC microcontroller s page size), it cannot be placed in one page. To simplify its application, I placed the code for each type of polarity in its own page. Normally, when I am creating an application, I would consider placing the code all together and putting in the comparisons between positive and negative incoming serial data. I didn t in this case because there is no 512-instruction PIC16F505, and I had more than enough program memory space to implement the application this way. Many serial LCD interfaces on the market today have the capability to accept LCD instructions as well as LCD data. The project given here has this capability as well. To send an LCD instruction, the data byte 0x0FE has to be sent rst. The next byte received will be written to the LCD as an instruction rather than a data byte. The most signi cant problem I had with getting this application running (once I had gured out the switch problem) was at 1,200 bps with the busy ag polling. I incorrectly left the state of the R/S ag set after a data byte write to the LCD, and when polling the value back, a data read was initiated accidentally. This was a very confusing problem to nd because there was no problem at 9,600 bps. I eventually found the problem by looking at the state of the LCD pins when the E strobe was active. In each data transfer, the rst action was correct, the data byte was being written to the LCD, but when I went through all the LCD s bits, I discovered that RS was in the wrong state for polling the busy ag. ULTRA: ULTRASONIC LCD RANGING With the serial LCD interface completed, I wanted to try to interface with it using a PIC microcontroller to see how useful it would be. The project that I came up with is a distance-measuring tool using the Polaroid 6500 module and transducer (which can be seen in Fig. 21.8). The resulting project can measure distances using the same ultrasonic transducer as many cameras use to set their lenses. The Polaroid 6500 is very easy to work with, although there are a couple of things to watch out for. The PIC microcontroller used with this project is the PIC12C509. This application also was an experiment to nd out how well two PIC microcontrollers with internal RC oscillators could be used to communicate with each other. The positive NRZ signal input to the serial LCD interface presented as the previous project was used without any type of signal conditioning. The actual communications were not perfect, but they did give me some insight into how the internal oscillators of the PIC microcontrollers work and their relative accuracy. The ultrasonic transducer I chose for this application is the Polaroid 6500, which was rst developed in the mid-1970s for use with Polaroid autofocusing cameras. The operation of the device is quite simple. A controller outputs a pulse to the module (which can be up to 100 ms long) and then measures the time for the echo to come back. The interface normally is accomplished using two wires connected to a microcontroller. The black disk that can be seen in Fig. 21.8 is the ultrasonic transducer that both outputs the ultrasonic signal (which can be heard as a click) and receives the echo when
QR Code 2d Barcode Reader In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Drawing QR Code JIS X 0510 In Visual C#.NET
Using Barcode drawer for .NET framework Control to generate, create QR Code image in Visual Studio .NET applications.
Denso QR Bar Code Encoder In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
QR-Code Creation In VS .NET
Using Barcode generation for .NET Control to generate, create QR Code image in VS .NET applications.
Denso QR Bar Code Creator In Visual Basic .NET
Using Barcode maker for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications.
UCC-128 Generation In None
Using Barcode printer for Software Control to generate, create UCC-128 image in Software applications.
Printing Code 128 Code Set A In None
Using Barcode drawer for Software Control to generate, create Code 128B image in Software applications.
UPC - 13 Printer In None
Using Barcode maker for Software Control to generate, create EAN / UCC - 13 image in Software applications.
Encode Barcode In None
Using Barcode creator for Software Control to generate, create barcode image in Software applications.
Barcode Creation In None
Using Barcode printer for Software Control to generate, create bar code image in Software applications.
Create Bookland EAN In None
Using Barcode printer for Software Control to generate, create ISBN - 10 image in Software applications.
Decoding DataMatrix In .NET Framework
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Recognize Bar Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Bar Code Scanner In C#.NET
Using Barcode Control SDK for .NET Control to generate, create, read, scan barcode image in VS .NET applications.
Encoding EAN 128 In Objective-C
Using Barcode generation for iPad Control to generate, create GTIN - 128 image in iPad applications.
Make UPC-A In Java
Using Barcode maker for Java Control to generate, create UPC-A Supplement 2 image in Java applications.
UPCA Creation In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create UPC-A Supplement 2 image in VS .NET applications.
Creating EAN / UCC - 13 In None
Using Barcode generator for Excel Control to generate, create USS-128 image in Excel applications.
Copyright © OnBarcode.com . All rights reserved.