Software is freely available to download from my site plus a pdf document explaining in detail how the software works. In this section of the tutorial, lcd interfacing with microcontroller, i will explain you that how to interface an lcd with 8051 microcontroller and the step by step procedure to design a simple program for 8051 microcontroller in order to display the messages on the lcd interfaced with it in the tutorial, i have given a detailed discussion about. Interfacing pic12f1822 microcontroller with i2c lcd. Programming with pic microcontroller research design lab. Pic 16f877a is a microcontroller manufactured by microchip inc. Aim to interface lcd displaytech 162a with pic16f877microcontroller and to display iitk in the liquid crystal display lcd. A temperature sensor converts temperature into an equivalent voltage output, so here we use lm35 to do the task. In this tutorial we will see how to write data to an lcd with pic microcontroller using hitech c compiler. The lcd module interface with a microcontroller is simple and it is a primitive means of adding a visual appeal to your embedded application. Before we begin with the lesson of keypad interfacing, it is assumed that you know how to interface an lcd with pic16f877a microcontroller. For executing lcd commands we should add this lcd library file to the program code. Functions for interfacing lcd with pic microcontroller.
We will use few push buttons to set the alarm time whenever required. Character lcds are the some of the cheapest means lcd. The software will need to control communicaton speed and timing to ensure the slow lcd and fast microcontroller can stay synchronized. Interfacing lcd and keypad with pic16f877a microcontroller. This powerful 200 nanosecond instruction execution yet easytoprogram only 35 single word instructions cmos flashbased 8bit microcontroller packs microchips powerful pic architecture into an 40 or 44pin package and is upwards compatible with the pic16c5x, pic12cxxx and pic16c7x. The circuit is simple, there is the microcontroller pic16f877a, dht11 sensor and 1602 lcd to display humidity and temperature results.
Learn to control an lcd with pic microcontroller studentcompanion. To make things easier we have made a small library that could make things easy while using this lcd with our pic16f877a. This project describes a simple temperature measurement and display system based on lm35 sensor and pic16f877a microcontroller. This microcontroller is very convenient to use, the coding or programming of this controller is also easier. Lcd is controlled by display controller which determines its features. The following image shows project circuit schematic. As per the name the 2x16 has 2 lines with 16 chars on each lines. During the initializing sequence and other commands this pin should low. Pic16f877a sample c ir sensor counter program pic16f877a connect to 16 pin lcd pic16f877a projects embedded c books in pic16f877a pic16f877a pic16f877a manual vending machine schematic diagram projects and circuits for data logger pic16f877a programmer circuit. Control lines rs, rw, e are connected to port pins rc0rs, rc1e and data lines d0d7 to port pins rd0rd7 whereas rw is directly grounded. Each character is displayed using 5x8 or 5x10 dot matrix. It can be easily interfaced with pic microcontroller by using only one inputoutput pin. In this tutorial we are going to see how to interface a 2x16 lcd with pic16f877a in 8bit mode.
Interfacing pic12f1822 microcontroller with i2c lcd this topic shows an example for connecting lcds with hd44780 or complaint controller with microchip pic12f1822 8bit microcontroller, this microcontroller has only 8 pins of which 5 can be used as outputs, therefore an i2c lcd. Introduction to pic microcontroller a microcontroller has 3 basic parts. Lcd interfacing with pic microcontroller pic16f877a. Pic16f877a datasheet pdf microcontrollers microchip. Pic microcontroller pic16f877a based digital alarm clock. The process of measuring is performed by a sensor that converts temperature into voltage. In the first half of the c program i have set first four pins to input from lsbrd0 and others to output and store the value in a variable and in other half i have set last four pins to input and others to output and stored its value into another variable i have called this function in a continuous loop to get a pressed key. To interface lcd with pic16f877a and display the text lcd interface on it. It features all the components which modern microcontrollers normally have. Keypad interfacing with pic microcontroller,in this tutorial, you will learn a very simple method of interfacing a keypad with pic microcontroller. The commands and the data to be displayed are sent to the lcd module in the nibble mode from port d of the microcontroller. The board has a potentiometer to adjust lcd contrast. Interfacing picmicro mcus to an lcd module microchip. Pic18f4550 belongs to the pic18f family and is an 8bit.
Read this post to know about interfacing 16x2 lcd to pic18f4550 microcontroller. I am interfacing a 3x4 keypad to pic16f877a uc on portd as. Learn to interface an lcd with pic microcontroller, display characters and send commands to lcd using lcd library with mcc and pic18f peripheral libraries. Pic16f877 based projects pic microcontroller pdf pic.
Interfacing lcd with pic16f877a 8bit mode tutorials. The 16f877a is a capable microcontroller that can do many tasks because it has a large enough programming memory large in terms of sensor and control projects 8k words and 368 bytes of ram. The microcontroller clock is generated by an external 10mhz crystal. The control lines en, rw and rs of the lcd module are connected to pins ra1, ra2 and ra3 of port a of the microcontroller, respectively. Care must be taken from having communication occur too quickly. In the previous chapter, we discussed how a character lcd is interfaced with a pic microcontroller in 8bit mode. Pic16f877a microcontroller based projects list pic. Pic18f4550 is an 8bit microcontroller and uses risc architecture. Interfacing lcd display with pic microcontroller mikroc.
Pic16f877a microcontroller pic16f877a specifications pic16f877a pin diagram pic16f877a block diagram pwm using pic16f877a c code pwm inverter using pic microcontroller control dc motor speed using pic16f877a pic16f877a circuit diagram pic16f877a connect to 16 pin lcd. One important thing to notice in the program is the pin definitions of lcd. Lcd interfacing with pic microcontroller mplab xc8 and. The capacitor c2 and c3 will act filters to the crystal oscillator. Interfacing lcd module with microcontroller embedjournal. Youll learn how to connect the lcd to pic, send characters, numbers to be displayed, clear. The pic16f887 is one of the latest products from microchip. Lcd interfacing with pic microcontroller pic16f877a using. The shift register data line is connected to rb0 pin and the clock line is connected to rb1 pin. This is enough to do many different projects see links at. One of the main advantages is that it can be writeerase as many times as possible because it uses flash memory technology. Piclcd is simple but powerful board which uses microchips pic18f8490 microcontroller.
This video describes how to interface the popular 16 x 2 lcd with pic16f877a. Accordingly, the program is divided in four parts that you have to go through as per the following order. The cpu core memory both rom and ram digital io microcontroller s basic parts c p u m e m o r y io b u s. Lcd type hd44780 interfacing tutorial with microcontroller pic, 8051 and avr. Functional description of pic16f877a functions and. As a keen programmer and picmicro enthusiast i have developed both and lcd interface module and and lcd programmer to help others learn how to use an lcd. Below is the circuit diagram for interfacing 16x2 lcd with pic microcontroller i have not shown the power supply or icsp connection in the above circuit, since we are using the same board which we have used in previous tutorial, check here.
Its old and microchip itself is not recommending it for new designs but its features and price make it still a popular microcontroller. Microchip, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The flashbased, powermanaged, lcd pic microcontroller family meets low power design requirements including driving the lcd display in. The resistor r1 is used for giving the contrast to the lcd. You can see its specifications and download the datasheet here. However the operating speed of microcontroller is very high so the flashing frequency will also be very fast to be detected by human eye. Mplabx with xc8 compiler is used to create the hex file. Do you know of any good tutorials of how to do this in assembly. Lcd are used in microcontroller applications requiring information to be displayed to users. Determine the number of segments necessary to achieve the desired display on the lcd and reference the pic microcontroller lcd matrix for. Lcd s drivers are slow devices when compared to microcontrollers. Learn to interface an lcd with pic microcontroller. Alarm clock using atmega32 microcontroller this alarm clock will have an 16x2 lcd display which will display the current time and set time. The crystal oscillator of 12 mhz is connected to the osc1 and osc2 pins of pic microcontroller pic18f4550 for system clock.
Pic16f877a datasheet pdf microcontrollers microchip, pic16f877a pdf, pic16f877a pinout, pic16f877a data, circuit, output, ic, pic16f877a schematic. Lcd tutorial for interfacing with microcontrollers. It can be easily interfaced with a microcontroller. Interfacing lcd with pic microcontroller hi tech c electrosome. Piclcd is equipped with lcd display, three user buttons. Pic16f877a microcontroller introduction and features. Pin diagrams 10 pic16f873a876a 11 2 3 4 5 6 1 8 7 9 12 14 15 16 17 18 19 20 23 24 25 26 27 28 22 21 mclr. Pic16f87xa ds39582bpage 2 2003 microchip technology inc. For reliable performance, lcd has to be initialized with certain commands. The program ash memory can be programmed in the circuit through pins 36, 39, and 40 using the ccs icds40 incircuit programmer. Basic block diagram structure cpu io p o r t s adc rom serial port watch dog t i m e r ram. There are two basic types of lcd modules in the market they are, character lcd and graphics lcd. Interfacing lcd and keypad are one of the important interfacing concepts of pic microcontroller since both the input and output element can form a complete embedded system design.
How to interface 16x2 lcd with pic microcontroller electronics hub. For its low price, wide range of application, high quality and easy availability, it is an ideal solution in applications such as. Pic microcontrollers with integrated lcd driver module. Pic18f4550 has 40 pins in pdip dual in line package and 44 pin in tqfp qua. Top 20 pic microcontroller projects pic microcontroller. Lcd interfacing with microcontrollers the engineering. The pic microcontroller pic16f877a is one of the most renowned microcontrollers in the industry. Microcontroller a beginners guide introduction and interfacing an lcd liquid crystal display the microcontroller is a wonderful piece of engineering and it can do many things with the help of some great programming, but it is still an opaque black box. Interfacing dht11 sensor with pic16f877a ccs c compiler.
It supports all the ascii chars and is basically used for displaying the alpha numeric characters. A character lcd can be configured in 8 bit or 4bit mode in which 8 data pins and 4 data pins are used respectively this feature allows efficient use of the digital i0 pins of the microcontroller. In this tutorial, i will show you how to interface dht11 humidity sensor with pic microcontroller and how to measure temperature and humidity with dht11 sensor. The microcontroller uses its ad converter to convert this voltage analogue value to a number digital value which is then sent to the lcd display via several conductors. Dht11 sensor interfacing with pic16f877a microcontroller. Interfacing 16x2 lcd with pic microcontroller instructables. Hi all, i want to interface an lcd with an 18f4550 pic using assembly. The pic16f877a is a 40pin dip microcontroller which microchip describes as powerful based on having a 200 nanosecond instruction speed. This produces a single instruction cycle time of 0.
The core architecture is highperformance risc cpu with only 35 single word1 instructions. Pic 16f877 architecture pic 16f877 is a 40pin 8bit cmos flash microcontroller from microchip. This tutorial is about teaching you how to get input input values from keypad by polling method and display the input into a 16. For the love of physics walter lewin may 16, 2011 duration. Pic microcontrollers the basics of c programming language. In this tutorial we will learn how to interface 16. Interfacing pic16f877a microcontroller with 3wire lcd. This is the first time that im going to interface an lcd with a pic. The mikro c pro for pic offers a library for communication with lcdss over the 4bit interface. The timing requirements of the lm032l are shown in appendix a.
1528 1326 647 1180 1058 1556 1609 1321 1609 896 1055 879 970 527 1509 181 320 134 551 784 853 284 620 410 665 330 1091 677 514 1457 148 328 532 406