Hello everyone, I hope you all are doing great. Today, I am going to share a very basic tutorial on PIC Microcontroller, which is Interfacing of Keypad with PIC Microcontroller. I have designed this simulation of Keypad with PIC Microcontroller in Proteus ISIS and the simulation along with code is given below for download. But I would suggest you to read it first and then design it on your own so that you learn most out of it.In today’s tutorial, I am not gonna discuss the details of How keypad works because I have discussed it in detail in my old tutorial Interfacing of Keypad with Arduino so if you don’t have much idea about working of keypad then I would recommend you to read that tutorial first, before proceeding with today’s tutorial. I have also interface this Keypad with 8051 Microcontroller, so today we are gonna interface this keypad with PIC Microcontroller. I have written programming code for this project in MikroC Pro For PIC. So, let’s get started with Interfacing of Keypad with PIC Microcontroller:
Interfacing of Keypad with PIC Microcontroller
- First of all, you can download the Simulation for this project along with programming code by clicking the below button:
- Now, let’s design it step by step.
- I have used LCD Library for Proteus so download it first and then run this simulation.
- First of all, design a simple simulation in Proteus software as shown in below figure:
- Now paste the below programming code in MikroC Pro For PIC.
- In this Programming code, the key pressed on keypad will be displayed on the LCD.
- So, when you press any button on the keypad, it will appear on the LCD.
- Here’s the code which you need to use in MikroC Pro For PIC:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | unsigned short kp, cnt, oldstate = 0; char txt[6]; char keypadPort at PORTD; sbit LCD_RS at RB0_bit; sbit LCD_EN at RB1_bit; sbit LCD_D4 at RB2_bit; sbit LCD_D5 at RB3_bit; sbit LCD_D6 at RB4_bit; sbit LCD_D7 at RB5_bit; sbit LCD_RS_Direction at TRISB0_bit; sbit LCD_EN_Direction at TRISB1_bit; sbit LCD_D4_Direction at TRISB2_bit; sbit LCD_D5_Direction at TRISB3_bit; sbit LCD_D6_Direction at TRISB4_bit; sbit LCD_D7_Direction at TRISB5_bit; void main() { cnt = 0; Keypad_Init(); Lcd_Init(); Lcd_Cmd(_LCD_CLEAR); Lcd_Cmd(_LCD_CURSOR_OFF); Lcd_Out(3, 2, "The Engineering"); Lcd_Out(4, 5, "Projects"); Lcd_Out(1, 1, "Key Pressed:"); do { kp = 0; do kp = Keypad_Key_Click(); while (!kp); switch (kp) { case 10: kp = 42; break; // '*' case 11: kp = 48; break; // '0' case 12: kp = 35; break; // '#' case 1: kp = 49; break; // 1 case 2: kp = 50; break; // 2 case 3: kp = 51; break; // 3 case 4: kp = 65; break; // A case 5: kp = 52; break; // 4 case 6: kp = 53; break; // 5 case 7: kp = 54; break; // 6 case 8: kp = 66; break; // B case 9: kp = 55; break; // 7 case 10: kp = 56; break; // 8 case 11: kp = 57; break; // 9 case 12: kp = 67; break; // C case 13: kp = 42; break; // * case 14: kp = 48; break; // 0 case 15: kp = 35; break; // # case 16: kp = 68; break; // D } Lcd_Chr(1, 14, kp); } while (1); } |
- Now get your hex file and upload it in your Proteus Simulation.
- Run your simulation and if everything goes fine then you will get results as shown in below figure:
- So, in the above figure, I have pressed button 5 on the keypad and it is shown on the LCD.
- Here’s the video demonstration which will help you better in understanding this project:
