R/W pin: R/W = 0 will write to the instruction register or data register as per the selection of RS pin. Positive edge-triggered when the pin is changed from the LOW state to HIGH state, LCD is prompted to read from the data pins. RS=0 will enable the Instruction register of the LCD.Įnable pin: Negative edge-triggered when the pin is changed from the HIGH state to LOW state, LCD is prompted to write to the data pins. RS Pin: RS=1 will enable the data register in the LCD, which is used to write the values to the data register in LCD. This LCD module is shown above versatile and uses minimum pins compared to other segmented LCDs. If you are curious to know how exactly all this works, you should check out the working of the 16x2 LCD display where we have already discussed how the LCD works in detail. 8 of which are data pins, 4 of them are supply pins for backlight LED and the whole LCD module, 3 for controlling the operation, and 1 pin for contrast adjustment. 16x2 Alphanumeric LCD DisplayĪ generic 16x2 Display has an inbuilt hd44780 IC (circled in red below), that can store the command and data passed to it. Here, the header file is modified to accommodate an 8-pin parallel configuration for data communication. It is a pretty expansive and comprehensive library and is configurable to the different connections. It also has provisions to display the data in different forms with leading, blanked, and deleted zeroes. It is very easy to use a library with separate functions to print different data types. The tutorial is based on the library created by Dennis Eichmann. It has an in-built IC hd44780 that can store the command and data passed to it. Interfacing LCD with PIC Microcontroller.To learn more about 16x2 LCD display and using it with other microcontrollers, please see below tutorials. Previously we have also interfaced LCD with MSP430 using Arduino IDE, in this tutorial, we will use the native Code Composer studio platform instead of using the Arduino IDE, this way as a designer, we get more flexibility. This tutorial is about interfacing a display with MSP430, when it comes to display the 16*2 LCD Display, it is the first choice for any electronic hobbyist. Last tutorial was based on external interrupts on MSP430 using GPIO pins. This article is the continuation of our tutorial series on programming MSP430 using Code Composer Studio.
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