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I couldn't get the E3 pin to work in PIC18f45k40

 
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sema_tufan



Joined: 03 Mar 2020
Posts: 14
Location: turkey

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I couldn't get the E3 pin to work in PIC18f45k40
PostPosted: Tue May 25, 2021 7:54 am     Reply with quote

Hello,
A few pins of LEDs were connected in my circuit board. Although I just set the E3 pin as output, I could not see the voltage.
Other leds work, only E3 pin does not work.
My code is as follows:
Code:

#include <18F45K40.h>   
#use delay(internal=16000000)


#FUSES PUT                     
#FUSES PROTECT                 
#FUSES NODEBUG                 
#FUSES NOBROWNOUT               
#FUSES NOLVP                   
#FUSES NOCPD                   

#FUSES NOWDT
#FUSES NOMCLR                 





#BYTE       TRISA          = 0xF88
#BYTE       TRISB          = 0xF89
#BYTE       TRISC          = 0xF8A
#BYTE       TRISE          = 0xF8C

#byte       PORTA          = 0xF8D
#byte       PORTB          = 0xF8E
#byte       PORTC          = 0xF8F
#byte       PORTE          = 0xF91



void main()
{
    setup_oscillator(OSC_HFINTRC_16MHZ);
    set_timer0(T1_DISABLED);
    setup_timer_1(T1_DISABLED);
    setup_timer_2(T2_DISABLED, 0, 1);
    setup_ccp1(CCP_OFF);



    TRISA = (0B00000000);
    TRISB = (0B00000000);
    TRISC = (0B00000000);
    TRISE = (0B00000000);

    PORTA = (0B00000000);
    PORTB = (0B00000000);
    PORTC = (0B00000000);
    PORTE = (0B00000000);



    while (true)
    {
        output_high(PIN_A0);
        output_high(PIN_A1);
        output_high(PIN_A2);
        output_high(PIN_B1);
        output_high(PIN_B2);
        output_high(PIN_B3);
        output_high(PIN_B4);
        output_high(PIN_B5);
        output_high(PIN_B6);
        output_high(PIN_B7);
        output_high(PIN_E3);
        delay_ms(1000);
        output_low(PIN_E3);
        output_low(PIN_A0);
        output_low(PIN_A1);
        output_low(PIN_A2);
        output_low(PIN_B1);
        output_low(PIN_B2);
        output_low(PIN_B3);
        output_low(PIN_B4);
        output_low(PIN_B5);
        output_low(PIN_B6);
        output_low(PIN_B7);
        delay_ms(1000);
    }
   
}

http://remoturk.com/e3.jpg
There is a photo of the circuit in the link.
Ttelmah



Joined: 11 Mar 2010
Posts: 19229

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PostPosted: Tue May 25, 2021 8:18 am     Reply with quote

This is a read the data sheet one.
From the device overview:

Quote:

Note 1: RE3 is an input only pin.


Never going to work as an output.
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