This is the presentation of ouc 18 ports

1. I/O Ports in PIC18
Microcontrollers
Understanding and Programming I/O
Ports in PIC18 MCU

2. Introduction to I/O Ports
• I/O ports in PIC18 microcontrollers allow
communication with external components like
sensors, LEDs, and motors.
• Each I/O port consists of multiple pins that can
be configured as input or output.

3. Understanding PORT Registers in
PIC18
• 1. TRISx Register: Configures direction (0 =
Output, 1 = Input)
• 2. LATx Register: Controls output values
• 3. PORTx Register: Reads input values

4. Example: Blinking LED using PORT
B
• #include <xc.h>
• #define _XTAL_FREQ 4000000 // 4MHz Crystal
• void main() {
• TRISBbits.TRISB0 = 0; // Set RB0 as output
• while(1) {
• LATBbits.LATB0 = 1; // Turn LED ON
• __delay_ms(500); // Delay for 500ms
• LATBbits.LATB0 = 0; // Turn LED OFF

5. Example: Reading a Button Press
on PORT B
• #include <xc.h>
• #define _XTAL_FREQ 4000000 // 4MHz Crystal
• void main() {
• TRISBbits.TRISB0 = 1; // Set RB0 as input
(Button)
• TRISBbits.TRISB1 = 0; // Set RB1 as output
(LED)
• while (1) {

6. Applications of I/O Ports in PIC18
• - LED Control
• - Motor Driving
• - Sensor Interfacing
• - Communication with External Devices