lcd display pic microcontroller in stock

or use an adapter for other interfaces such as ICD2 RJ11. Then select target program by number or by scrolling and just press Program button. Programming progress and pass/errors are shown on LCD screen.

In this tutorial, you will learn to interface anLCD with a pic microcontroller. It is very simple and easy to understand the project for beginners and is commonly used in several electronic products. LCD (Liquid Crystal Display)provides a user-friendly interface and can be very useful for debugging purposes. After completion of this tutorial, you will be able to display data on an LCD using MPLAB XC8 Compiler and Mikro C compiler. We will provide examples with two Compilers such as MPLAB XC8 Compiler and Mikro C for PIC.

The reason LCD is more popular than LED, Seven Segment displays. Because we can display characters, numbers and custom characters with ease ( Just by easily programming a module).

First of all, to interface LCD with a pic microcontroller, we used GPIO pins.  GPIO pins are general-purpose input-output pins. Because we send control and data signals to LCD through these I/O pins.  Therefore, you should know how to use digital input-output pins of the pic microcontroller. To know about GPIO pins programming, check these tutorials:

It can work in two modes, 4-bit and 8-bit. In this tutorial, we have used the 4-bit mode which uses only 4 data lines, thus saving pins of the microcontroller. So It is recommended to use LCD in four bits mode to save pins of the microcontroller for other applications.

As you can see in this diagram, if we use 8-bit mode interfacing, we will need to use 11 pins of pic microcontroller. On the other hand, if we use 4-bit mode, we need only 6 GPIO pins. Therefore, it is recommended to use 4-bit mode interfacing.  The only difference between  4-bit and 8-bit is that data transfer speed is faster for 8-bit mode. However, it doesn’t make any major difference.

A variable resistor is used to adjust the contrast of 5×8 dot pixels according to background light. Therefore, if you are not able to see anything on LCD after programming, the maximum changes are that you need to adjust contrast with the variable resistor. This contrast register makes adjust to the voltage applied on the VEE pin.

For MPLAB XC8 Compiler, we will use the PIC18F4550 microcontroller. For MikroC Pro for PIC, we will use the PIC16F877A microcontroller. In the case of MPLAB XC8, we will develop our own LCD library. Because the XC8 compiler does not provide built-in libraries. In the contrary, MikroC Pro provides libraries for all modules such as LCD, Keypad, ADC Module, UART module.

In this section, we will see how to write example code for 16×2 LCD interfacing with PIC18F4550 microcontroller. Although, you can use see code with other Pic microcontrollers also.

As we mentioned earlier, we can use the 8-bit mode and 4-bit mode interfacing. But due to the efficient use of MCU pins, we will be using 4-bit Mode. To interface LCD, we follow these steps:

In this circuit, we used the PORTB of PIC18F4550. But you can use any PORT. To do this, we need to change the pin assignment inside the code. I will show you how to assign pins for LCD in the next section.

These lines define which pins of the pic microcontroller should connect with LCD. For instance, in this example, we used the PORTD of PIC18F4550 microcontroller. Connect RD0-RD3 pins with D4-D7 pins of LCD respectively and other pins with RW, EN, RS and Power pins. But you can change PORT to other PORT of PIC microcontroller also by changing the PORT name with these commands.

LCDWriteNibble() function is used to write a nibble. Nibble is basically a half a byte. Because we are using LCD in four bits mode. Therefore, we need to send 8-bit commands/data in four bits chunks. This function writes the specified nibble to the LCD.

Because we will use 4-bit mode, data and commands transfer in 4-bits format. Even it requires at least 8-bit to display a character. To resolve this issue, we send data in a 4-bits format two times.

void LCDPutChar(char ch): Writes a character to LCD at current cursor position. This function displays the specified ASCII character at the current position on the LCD.

LCDGoto(char pos, char ln): This function positions the cursor at the specified line and column. Column and line at which the cursor should be positioned between 0-15 for pos (column) and 0-1 for ln(row).

In last section, we have seen how to display ASCII characters or string. But in almost all practical projects, we need to display, integer, float values. This code displays the counter value which increments from 0-9 after every one second. This is the main function of code only. Because the rest of the code is same as the previous program example.

In this section, we will see how to interface LCD with pic microcontroller and programming examples using MikroC for pic. MikroC pro has a built-in library.

We have used 16×2 LCD which means there are 2 rows and 16 characters in each row. So we can display a total of 32 characters at a time in two rows with 16 characters in each row.

This is the main command which prints our text on LCD. It also gives the privilege to specify the position of the text. In the horizontal direction, we count rows number and in a vertical direction, we count the column number. In above command,

However if your string is longer than the number of characters that could be displayed in a row from the starting position, the last characters will not be displayed. E.g. Lcd_Out (1, 6 “LCD Interface”);will display text in row 1 starting from column position 6 and will display only LCD Interfacethe rest of the characters will not be displayed as there is no room for them.

void Lcd_Out_Cp(char *text);will start printing the text from the current cursor position. For example after printing Lcd_Out (1, 1, “LCD”);if you write Lcd_Out_Cp(“Hello”);it will display “Hello”at a position from column position of 4 in row 1.

void Lcd_Chr(char row, char column, char out_char);allows only single characters to be displayed at specified positions. E.g. Lcd_Chr(2, 5, ‘A’); will print only A on column 5 row 2.

void Lcd_Chr_Cp(char out_char); allows to print only single character from current cursor position like after Lcd_Chr(2, 5, ‘A’);if your writeLcd_Chr_Cp(‘B’);it will be printed at row 2 column 6.

To interface LCD withPIC16F877A and display the text ‘LCD INTERFACE’ on it. LCDs come in different sizes and shapes. For this project, we have selected a 16×2 character, alphanumeric LCD. It contains 2 rows of 16 character.

When using PIC microcontroller, the mikroC compiler has a built-in LCD library that supports the commands to carry out LCD initialization. The library consists of a number of functions to control LCDs with 4-bit data interface.

The main program first clears the LCD screen and then displays “LCD INTERFACE” in the first row of LCD. The LCD pin directions are all set as outputs. The RS pin of LCD is set to 1, which indicates that the information received from DB4-DB7 is a valid text to be printed on LCD screen. The EN pin is also set to 1 which indicates that data is send to the LCD.

Programmed LCDs are vastly used for industrial as well as commercial applications. LCDs are used in UPSs or inverters, where voltage and current readings are displayed on the screen. Instructions to be followed are displayed on an LCD screen in airports, banks, hospitals, etc. If you still have any issue after reading this article, feel free to comment on this post with your issues.

I have made below changes as per suggestion.But cant seen any changes . if i connect using arduino LCD display so there is no issue in Display if i connected to PIC18F24k40

Microchip"s LCD PIC microcontroller family is a Flash-based, power managed family of LCD-enabled microcontrollers. Microchips LCD PIC microcontroller family meets low power design requirements including driving the LCD display in sleep mode while maintaining desired functional features. With the ability to select from an array of available LCD PIC microcontrollers, a designer can provide additional value by creating scalable designs and products. This gives the designer flexibility to offer different solutions based on the demand of varying market segments all from a single design.

In this tutorial we will see How to Interface a 16×2 character LCD module with PIC 16F877A Microcontroller using MPLAB X IDE and MPLAB XC8 C Compiler. 16×2 Character LCD is a very basic and low cost LCD module which is commonly used in electronic products and projects. 16×2 means it contains 2 rows that can display 16 characters. Its other variants such as 16×1 and 16×4 are also available in the market. In these displays, each character is displayed using 5×8 or 5×10 dot matrix.

For controlling LCD using MPLAB XC8 compiler we need to know the hardware of LCD. These LCDs commonly uses HD44780 compliant controllers. So we need to learn HD44780 Dot Matrix LCD Controller Datasheet. Don’t worry we already developed an LCD library including commonly used functions, so you can use it without any hardware knowledge of LCD.

First two pins GND and VCC (VSS and VDD) are for providing power to LCD display. 3ed pin VEE is used to control the contrast of the LCD display. A 10KΩ preset whose fixed ends connected to VDD, VSS and variable end connected to VEE can be used to control contrast of the LCD. A microcontroller or microprocessor need to send 2 types of information for operating this LCD Module, Data Information and Command Information. Data Information is the ASCII value of the characters to be displayed in the LCD screen and Command Information determines other operations such as position to be displayed, clear screen, shift etc. Data and Command Information are send to LCD through same data lines (DB0 – DB7) which are multiplexed using RS (Register Select) pin of LCD. When RS is HIGH LCD treats DB0 – DB7 data pins information as Data to be displayed and when it is LOW LCD treats it as Command Information. Enable (E) input of the LCD is used to give Data Strobe. HIGH (5V) Voltage Level in the Enable (E) pin tells the LCD that DB0 – DB7 contains valid information. The input signal R/W (Read or Write) determines whether data is written to or read from the LCD. In normal cases we need only writing hence it is tied to GROUND in circuit shown below.

The interface between this LCD and Microcontroller can be 8 bit or 4 bit and the difference between them is in how the data or commands are send to LCD. In the 8 bit mode, 8 bit data and commands are send through the data lines DB0 – DB7 and data strobe is given through E input of the LCD. But 4 bit mode uses only 4 data lines. In this 8 bit data and commands are splitted into 2 parts (4 bits each) and are sent sequentially through data lines DB4 – DB7 with its own data strobe through E input. The idea of 4 bit communication is introduced to save pins of a microcontroller. You may think that 4 bit mode will be slower than 8 bit. But the speed difference is only minimal. As LCDs are slow speed devices, the tiny speed difference between these modes is not significant. Just remember that microcontroller is operating at high speed in the range of MHz and we are viewing LCD with our eyes. Due to Persistence of Vision of our eyes we will not even feel the speed difference.

Hope that you got rough idea about how this LCD Module works. Actually you need to read the datasheet of HD44780 LCD driver used in this LCD Module to write a MPLAB XC8 program for PIC. But we solved this problem by creating a header file lcd.h which includes all the commonly used functions using 4 bit mode. Just include it and enjoy.

Lcd_Set_Cursor(int row, int column) : This function is used to set row and column of the cursor on the LCD screen. By using this function we can change the position of the character or string displayed by following functions.

sprintf() can be used to write formatted string to a variable. It can be used with this LCD library to format displayed texts. This enables us to display integers and floating point numbers on the LCD very easily. You should include the header file stdio.h for using sprintf().

This is our sixth tutorial in our PIC Tutorial Series, in this tutorial we learn Interfacing of 16x2 LCD with PIC Microcontroller. In our previous tutorials we have learnt the basics of PIC using some LED blinking Programs and have also learnt How to use Timers in PIC Microcontroller. You can check here all the tutorials on Learning PIC Microcontrollers using MPLABX and XC8 compiler.

This tutorial will be an interesting one because we will learn How to Interface 16×2 LCD with PIC16F877A, check the detailed Video at the end this tutorial. Gone are the old days where we used LEDs for user indications. Let us see how we can make our projects look more cool and useful by using LCD displays. Also check our previous articles on Interfacing LCD with 8051, with Arduino, with Raspberry Pi, with AVR.

To make things easier we have made a small librarythat could make things easy while using this LCD with our PIC16F877A. The header file "MyLCD.h" is given here for download, which contains all the necessary function to drive the LCD using PIC MCU. Library code is well explained by comment lines but if you still have doubts reach us through the comment section. Also check this article for Basic LCD working and its Pinouts.

Now, there are two ways to add this code into your program. You can either copy all the above lines of code in MyLCD.h and paste them before the void main(). Or you can download the header file using the link and add them to the header file of your project (#include " MyLCD.h ";). This can be done by right clicking on the header file and selecting Add existing Item and browsing to this header file.

Here I have copied and pasted the header file code into my main C file. So if you are using our code, then you don’t need to download and add the header file into your program, just use the complete Code given at the end of this Tutorial. Also note that this library will only support PIC16F series PIC Microcontroller.

void Lcd_Start():This function should be the first function that has to be called to start working with our LCD. We should call this function only once to avoid lag in the program.

void Lcd_Set_Cursor(x pos, y pos):Once started, our LCD is ready to take commands, we can instruct the LCD to set its cursor in you preferred location by using this function.  Suppose if, we need out cursor at 5th character of 1st row. Then the function will be void Lcd_Set_Cursor(1, 5)

Each time the Lcd_Print_Char(char data)is called, its respective character values is sent to the data-lines of the LCD. These characters reach the HD44780U in form of bits. Now this IC relates the bits to the character to be displayed by using its ROM memory as shown the below table. You can find bits for all the characters in the datasheet of HD44780U LCD Controller.

The hardware for this project is very simple. We are going to reuse the same PIC module that we used last time and connect the LCD module to our PIC using jumper wires.

In this project i am going to interface 16×2 lcd display in 4-bit mode with Microchip Pic16f877 microcontroller. We can interface any size of character lcd display (8×1,8×2,10×1,10×2, 16×2,16×2,16×4,20×1,20×2,40×1,40×2 etc) in 4-bit mode with pic microcontrollers. In 4-bit interface mode only 4 lcd data lines are used to display data on lcd screen. Usually lcd is interfaced in 4-bit mode with microcontrollers to save I\O pins of microcontrollers. Before beginning any further i assume that you know difference between 4-bit and 8-bit lcd interfacing mode with microcntrollers. If not just take the below simple tutorial. Tutorial will help you in understating the basic difference, pros and cons of both the modes. It will also help you in understanding the code below easily.

In 4-bit mode only 4-bit data is send to lcd at a time. Since 8-bit microcontrollers contains data in 8-bit form so we divide our data in to two nibbles(1-nibble=4-bits). First higher 4-bits(nibble) is send to lcd and then the lower 4-bits(nibble) with enable stroke signal. Only D4,D5,D6,D7 data pins of 16×2 lcd are used in 4-bit interface mode. D1,D2,D3,D4 are left empty. D4 is our least significant bit and D7 is highest significant bit in 4-bit interface mode. A typical interfacing diagram is given at the right side.

Interfacing 16×2 lcd with Pic16f877 microcontroller is simple, if you have taken the above tutorial. The circuit of the project is also very simple. Port-B first 4 bits (RB0,RB1,RB2,RB3) of Pic16f877 microcontroller are used to send 4-bit data and commands to lcd. These four Pins(RB0,RB1,RB2,RB3) are Connected to four data pins of 16×2 lcd(D4,D5,D6,D7).Port-D pin# 5 is connected to rw(read-write) pin of lcd. Port-D pin# 6 is connected to rs(register select) pin of lcd. Port-D pin# 7 is connected to en(Enable) pin of 16×2 lcd. If you are newbie and have to idea about the working and pin configuration of lcd. Below is a good tutorial.

This function is separating four bits from our command and puts them on RB0,RB1,RB2,RB3 line and then sends them to lcd. The following instructions are separating four bits.

This function is separating four bits from our 8-bit data and puts the 4-bit data on RB0,RB1,RB2,RB3 pins and then sends them to lcd. Following instructions are separating four bits.

In the main function i first called lcdint() function. This function is initializing our lcd. Refer to the data sheet of lcd if you dont know what is lcd initialization. Then i am sending data to 16×2 lcd which i want to display on lcd screen. I am displaying word “Microcontroller” on lcd display screen.

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MCU, PIC32, 32BIT, 40MHZ, TQFP-100, Product Range:PIC32 Family PIC32MX Series Microcontrollers, Device Core:PIC32, Data Bus Width:32bit, Operating Frequency Max:40MHz, Program Memory Size:256KB, No. of Pins:100Pins RoHS Compliant: Yes

MCU, PIC32, 32BIT, 40MHZ, TQFP-100, Product Range:PIC32 Family PIC32MX Series Microcontrollers, Device Core:PIC32, Data Bus Width:32bit, Operating Frequency Max:40MHz, Program Memory Size:256KB, No. of Pins:100Pins RoHS Compliant: Yes

MCU, 32BIT, 50MHZ, TQFP-100, Product Range:PIC32 Family PIC32MX Series Microcontrollers, Architecture:PIC32, No. of Bits:32bit, CPU Speed:50MHz, Program Memory Size:512KB, RAM Memory Size:64KB, No. of Pins:100Pins RoHS Compliant: Yes

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MCU, 32BIT, PIC32, 40MHZ, SOIC-28, Product Range:PIC32 Family PIC32MX Series Microcontrollers, Architecture:PIC32, No. of Bits:32bit, CPU Speed:40MHz, Program Memory Size:64KB, RAM Memory Size:16KB, No. of Pins:28Pins RoHS Compliant: Yes

MCU, 32BIT, 50MHZ, TQFP-64, Product Range:PIC32 Family PIC32MX Series Microcontrollers, Architecture:PIC32, No. of Bits:32bit, CPU Speed:50MHz, Program Memory Size:128KB, RAM Memory Size:16KB, No. of Pins:64Pins, MCU Case Style:TQFP RoHS Compliant: Yes

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256Byte 4Kx14bit 2.3V5.5V -40+85 PIC 1x1ch/5bit 1x12ch/10bit Internal oscillator included 20MHz 17 SSOP-20208mil Microcontroller Units (MCUs/MPUs/SOCs) ROHS

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