Question Write a code on the pic using the following MODULE (CCP) MODULE + (MSSP) with no more than 300 instructions exactly explaining how these terminals work, meaning that examples are applied to them by writing code that is loaded on the pic . .

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 Question

Write a code on the pic using the following MODULE (CCP) MODULE + (MSSP) with no more than 300 instructions exactly explaining how these terminals work, meaning that examples are applied to them by writing code that is loaded on the pic . .

embedded systems , microprocessors ....

Answer

Step 1

Write a code on the pic using the following MODULE (CCP) MODULE + (MSSP) with no more than 300 instructions exactly explaining how these terminals work, meaning that examples are applied to them by writing code that is loaded on the pic . .

embedded systems , microprocessors ....

Step 2

Soln:-

#include <stdio.h>

#include <stdlib.h>

#include <p18f4550.h>

#include "osc_config.h"

#include "LCD_8bit_file.h"

#include <string.h>

 

#define f_timer 2000000

 

void main()

{

    unsigned long signal_period,data1,data2;

    unsigned long frequency_Hz[20];

    float Frequency;

    TRISCbits.TRISC2=1;

    OSCCON=0x72;        /* set internal clock to 8MHz */

    LCD_Init();

    memset(frequency_Hz,0,20);

    LCD_String_xy(0,1,"Pulse");

 

    PIE1bits.CCP1IE=1;

    PIR1bits.CCP1IF=0;    

    CCP1CON=0x05;       /* Capture mode is selected for detecting Rising edge */

    CCPR1=0x00;         /*CCPR1 is capture count Register which is cleared initially*/

    TMR1IF=0;          

    T1CON=0x80;         /* Enable 16-bit TMR1 Register,No pre-scale,use internal clock,Timer OFF */

    TMR1=0;

            TMR1ON=1; /* Turn-On Timer1 */  

    while(1)       

    {   

        while(!(PIR1bits.CCP1IF));  /*Wait for Interrupt flag which is generated when edge is detected*/

        PIR1bits.CCP1IF=0;

        data1 = CCPR1;              /*Copy count of 1st edge detected*/       

           

        while(!(PIR1bits.CCP1IF));  /*Wait for Interrupt flag which is generated when edge is detected*/

        PIR1bits.CCP1IF=0;

        data2 = CCPR1;              /*Copy count of 2nd edge detected*/

 

        if(data1 < data2)

           {

 

            /*Calculation for Frequency Measurement*/

            signal_period = data2 - data1;

            Frequency = ((float)f_timer / (float)signal_period); /*Count for 1 cycle*0.5us gives period */

            sprintf(frequency_Hz,"%.3f  ",Frequency);

 

            LCD_String_xy(2,0,frequency_Hz);

           

            }

        TMR1=0;

        memset(frequency_Hz,0,20);

    }                             

}