Using 16F887 microcontroller to count external pulses using T0, the counting results are displayed on 3 leds directly connected to 3 ports

• Requirements: Using microcontroller 16F887 to count external pulses using T0, counting results displayed on 3 leds directly connected to 3 ports, counting limit from 000 to 255, when equal to 255, return to 0
•  Circuit diagram on Proteus simulation software:

Figure 1. Counting external pulses using counter T0

• Main program:

Use PIC16F887 to count external pulses using T0.c

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#INCLUDE<TV_16F887.C>

UNSIGNED INT8 T0, MATRAM, MACHUC;

VOID MAIN()

{

   SET_TRIS_B(0x00); SET_TRIS_C(0x00); SET_TRIS_D(0x00);

   SETUP_TIMER_0(T0_EXT_L_TO_H | T0_DIV_1);

   SET_TIMER0(0);

   WHILE(TRUE)

   {

      T0=GET_TIMER0();

      MATRAM=MA7DOAN[T0/100]; MACHUC=MA7DOAN[T0/10%10];

      IF (MATRAM==0XC0)

      {

         MATRAM=0XFF;

         IF (MACHUC==0XC0) MACHUC=0XFF;

      }

      OUTPUT_B(MA7DOAN[T0%10]);

      OUTPUT_D(MACHUC);

      OUTPUT_C(MATRAM);

   }

}

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• TV_16F887.c Library:

TV_16F887.c

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#INCLUDE <16F887.H>

#FUSES NOWDT,PUT,HS,NOPROTECT,NOLVP

#USE DELAY(CLOCK=16M)

CONST UNSIGNED CHAR MA7DOAN [10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,

0x80,0x90};

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Link download: https://drive.google.com/file/d/1DNHnyuW7qReOZCQCr9emgtAAv7hOg9m9/view