This contrast register makes adjust to the voltage applied on the VEE pin. 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. However, it doesn’t make any major difference.Ī variable resistor is used to adjust the contrast of 5×8 dot pixels according to background light. The only difference between 4-bit and 8-bit is that data transfer speed is faster for 8-bit mode. Therefore, it is recommended to use 4-bit mode interfacing. On the other hand, if we use 4-bit mode, we need only 6 GPIO pins. So It is recommended to use LCD in four bits mode to save pins of the microcontroller for other applications.Īs you can see in this diagram, if we use 8-bit mode interfacing, we will need to use 11 pins of pic microcontroller. In this tutorial, we have used the 4-bit mode which uses only 4 data lines, thus saving pins of the microcontroller. It can work in two modes, 4-bit and 8-bit. Its pin configuration is given as follows: Pin Number Name Use 1 Vss Ground 2 Vdd Power 3 Vee To adjust the contrast 4 RS 1=Data inputĠ=Instruction input 5 R/W 1=Read from LCDĠ=Write to LCD 6 Enable (EN) From 1 to 0 = Data is written to the LCD 7 DB0 Data Bus Lines 8 DB1 9 DB2 10 DB3 11 DB4 12 DB5 13 DB6 14 DB7 15 LED+ Backlight 16 LED- How to interface/Connect LCD with PIC Microcontroller

LED+ and LED- pins are used to control the backlight LED. There are 8 data pins from D0-D7 and three control pins such as RS, RW, and E. Now let’s first understand the pinout diagram and commands of 16×2 Liquid Crystal display.

LED Blinking Examples using Pic Microcontroller.How to use Input/Output pins of PIC Microcontroller.To know about GPIO pins programming, check these tutorials: Therefore, you should know how to use digital input-output pins of the pic microcontroller. Because we send control and data signals to LCD through these I/O pins. GPIO pins are general-purpose input-output pins. Applications How to Interface 16X2 LCD with PIC Microcontroller?įirst of all, to interface LCD with a pic microcontroller, we used GPIO pins.LCD Connections with pic microcontroller.LCD Interfacing with PIC16F877A MikroC Pro.LCD Display Commands in Mikro c for pic.LCD Interfacing Code MPLAB XC8 Compiler.LCD Interfacing Programming MPLAB XC8 Compiler.PIC Microcontroller LCD Interfacing Programming.How to interface/Connect LCD with PIC Microcontroller.How to Interface 16X2 LCD with PIC Microcontroller?.

Mplab xc8 pic18f4321 header files