These connections must be defined for the proper working of the LCD library. Lcd8_Init() & Lcd4_Init() : These function will initialize the LCD module which is connnected to pins defined by following bit addressable variables.įor 4 Bit Mode : //LCD Module Connections
Thus 4 bit mode data transfer is most commonly used. 4 bit communication is a bit slower than 8 bit communication but this speed difference can be neglected since LCDs are slow speed devices. The idea of 4 bit communication is used save pins of microcontroller. In this mode 8 bit character ASCII data and command data are divided into two parts and send sequentially through data lines. LCD commands which are also 8 bit are written to LCD in similar way.īut 4 Bit Mode uses only 4 data lines D4 – D7. In 8 bit mode to write a character, 8 bit ASCII data is send through the data lines D0 – D7 and data strobe is given through E of the LCD. These differs in how data is send to LCD. LCD can be interfaced with microcontroller in 4 Bit or 8 Bit mode. You can download the header file at the bottom of this article. To solve this problem we have developed a LCD library which includes commonly used features, you just need to include our header file and use it. Interfacing 16×2 LCD with 8051 using Keil C is bit complex because there is no powerful libraries in Keil C. Each character is displayed using 5×7 or 5×10 pixel matrix. 16×2 character lcd display is very basic module which is commonly used in electronics devices and projects. Liquid Crystal Display ( LCD) is very commonly used electronic display module and having a wide range of applications such as calculators, laptops, mobile phones etc.
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