barcode scanner sdk vb.net This page intentionally left blank in Software

Drawer Quick Response Code in Software This page intentionally left blank

This page intentionally left blank
Reading Quick Response Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code Generator In None
Using Barcode generation for Software Control to generate, create QR Code 2d barcode image in Software applications.
Understanding a 16-CharaCterby-2-Line LCd dispLay
Scanning QR Code JIS X 0510 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Creating QR-Code In C#.NET
Using Barcode printer for .NET framework Control to generate, create QR Code image in .NET framework applications.
In general, this chapter is about interfacing an external device to the Propeller using a liquid crystal display (LCD) as the target device. Specifically, this chapter is about attaching various LCDs to your projects. Almost all the LCDs on the market with built-in controllers use the scheme we are about to investigate to communicate with them. Displays that go from 8 characters on one line to 40 characters on each of four lines are available. All these displays can be addressed with the techniques discussed in this chapter. We need some way to see what is going on in our programs as we develop them. We will focus our efforts on a 16-character-by-2-line LCD (see Figure 21-1). These LCDs can be purchased for between $4.50 and $6 on the Internet. They provide an inexpensive
Denso QR Bar Code Creation In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create QR image in ASP.NET applications.
QR Code ISO/IEC18004 Generator In .NET
Using Barcode drawer for VS .NET Control to generate, create QR image in VS .NET applications.
Figure 21-1 A 16-character-by-2-line LCD module
Encoding QR Code 2d Barcode In VB.NET
Using Barcode creation for VS .NET Control to generate, create QR Code 2d barcode image in .NET applications.
EAN-13 Supplement 5 Generator In None
Using Barcode creation for Software Control to generate, create EAN / UCC - 13 image in Software applications.
Understanding a 16-CharaCter-by-2-Line LCd dispLay
Data Matrix Generator In None
Using Barcode encoder for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
Creating Bar Code In None
Using Barcode creator for Software Control to generate, create barcode image in Software applications.
way of adding a display to our projects, and the 32 characters they display provide enough information for most simple experiments. We will develop the software to control this LCD in the following experiments, and we will use this LCD as the display for all our experiments. This being the case, we need a comprehensive set of routines to allow us to have complete control of this device. The basic routines will be developed as we proceed. You can add to them as your proficiency and needs increase.
Bar Code Maker In None
Using Barcode creation for Software Control to generate, create barcode image in Software applications.
Print USS-128 In None
Using Barcode creator for Software Control to generate, create UCC - 12 image in Software applications.
note A one- or two-line LCD can add a tremendous amount of utility to a project.
Creating Code 2/5 In None
Using Barcode maker for Software Control to generate, create 2 of 5 Standard image in Software applications.
EAN128 Encoder In None
Using Barcode creator for Online Control to generate, create EAN / UCC - 13 image in Online applications.
Our goal in this experiment is to get the LCD up and running from its most primitive first instructions. A number of very specific instructions have to be sent to the LCD to start it up. These are specified in the startup instruction set for the LCD specified in the manual for the Hitachi 44780 controller. This Integrated Circuit controls the internal workings of the LCD and almost all similar LCDs on the market. Our particular LCD can be controlled by sending data to it either 4 bits at a time or 8 bits at a time. We will cover both techniques, with the 8-bit protocol first. It is useful to have the full 40+ page data sheet on hand when you are doing anything more than sending text to the LCD. The Hitachi 44780 data sheet can be downloaded from the Internet by searching Hitachi 44780 and looking for a suitable PDF version of the datasheet. Datasheets can also be downloaded from the websites of most electronic component suppliers like Digikey, Mouser, and Avnet.
Encode Code 128C In Objective-C
Using Barcode generation for iPhone Control to generate, create Code 128 image in iPhone applications.
GTIN - 13 Generator In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create EAN13 image in ASP.NET applications.
8-Bit Mode
Make UPC-A In C#.NET
Using Barcode creation for .NET framework Control to generate, create Universal Product Code version A image in Visual Studio .NET applications.
Recognize Data Matrix ECC200 In Visual C#
Using Barcode scanner for .NET framework Control to read, scan read, scan image in VS .NET applications.
The circuitry needed to connect the LCD to the Propeller chip is shown in Figure 21-2. Although the LCD can be written to 4 bits at a time or all 8 bits at one time, the diagram shows all eight lines connected to the data bus so that we can experiment with either 4 or 8 bits. After all is said and done, we will use the 4-bit mode so that we can free up four lines on the Propeller. It is possible to write to the LCD by sending it the characters we want it to display as well as to read from the LCD to determine what is in the current LCD memory. These 16 2 LCDs can display only 32 characters, but they have enough memory to store 80 characters. The display can be scrolled left and right to see the hidden characters. If you are never going to read from the LCD (and reading is seldom necessary, except to read the Busy bit), you can tie the R/W line low and save one line on the Propeller for other uses. (The busy bit is then handled with a short delay to allow it to turn Figure 21-2 Connecting the LCD off.) Because using 4 bits for communications to the Propeller chip (8-bit mode)
Bar Code Generator In C#
Using Barcode maker for .NET Control to generate, create barcode image in Visual Studio .NET applications.
Barcode Creation In None
Using Barcode drawer for Microsoft Word Control to generate, create barcode image in Microsoft Word applications.
Copyright © OnBarcode.com . All rights reserved.