Lesson Microcontroller Course # Explanation of TRIS

First, we must know the legs that we can control in the pick

For example pic16f84a

 

In this microcontroller, we can control 13 men RA AND RB

RA0 RA1 RA2 RA3 RA4

RB0 RB1 RB2 RB3 RB4 RB5 RB6 RB7

I mean, we can enter information and get it out of 13 men into the controller by programming it in C or Microsi language

The condition is that the legs that will be the entrances and the legs that will be the exits are determined, and we cannot use a leg that acts as an entrance and an exit at the same time.

Example :

I want when I press a button or button to turn on the lamp

I mean, inside the program, we will program a pin to be an input input and a pin to be an output

 The input man will be the one who will know that we have pressed the button, and the exit man will be the one who will take out v5 volts to turn on the lamp.

 

Now we will explain what TRIS is

It is simply a function that tells the microcontroller about the inputs and outputs that you will use in your project

We mark the entries with the number 1 and the exits with the number 0

input = 1

output = 0

for example

I want to use all legs of RA as inputs

As we know we have 5 legs in RA

 TRISA=0b11111;

0b = means that the number is written in binary

There is also 0x means that the number is written Hexadecimal HEX

 Brown is the man RA0

RA1

RA2

RA3

Yellow is the man RA4

Example 2

 

TRISA=0b11000;

 

This code means that we told the controller that the legs RA0 RA1 will act as inputs and the rest of the legs RA2 RA3 RA4 will act as outputs

 

Write the complete code as follows

void main(){

; TRISA=0b110000

}

 

Any questions, you are welcome + I did not go into much depth so as not to make it difficult for you, good luck