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PortE problem?? PIC18F458

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ABOELLEEL

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Hi all,
My project is very simple that is keypad UP,DN & OK, LED
When i press ok LED is ON and OFF if i pressed UP or DN
UP----> porte.f1
DN----> porte.f0
OK----> portc.f3
LED---> porte.f2
and this is the code

Code C - [expand]
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void main()
 {
 TRISE = 0X03;
 PORTE.F2 = 0;
 TRISC.F3 = 1;
 
  while(1)
  {
   if(PORTE.F1 == 1) PORTE.F2 = 0;   //UP
   
   if(PORTE.F0 == 1) PORTE.F2 = 0;     //dn
   
   if(PORTC.F3 == 1) PORTE.F2 = 1;      //ok
 
   }
   }


The problem that i can turn LED on and cant off it
I am using mikroC V8.2.0.0
:?::?::?::?::?::?::?::?::?:
 
Last edited by a moderator:

Try this code

Code: 
void main()
{
TRISE = 0X03;
PORTE.F2 = 0;
TRISC = 0x08;

while(1)
{
if(PORTE.F1 == 1)
	Delay_ms(150);
		if(PORTE.F1 == 1)
 			PORTE.F2 = 0; //UP

if(PORTE.F0 == 1)
	Delay_ms(150);
		if(PORTE.F0 == 1)
		 	PORTE.F2 = 0; //dn

if(PORTC.F3 == 1)
	Delay_ms(150);
		if(PORTC.F3 == 1) 
			PORTE.F2 = 1; //ok

}
}

You need to give debounce for buttons.

When OK is pressed led will turn ON. pressing up or down will turn off the led.
 

I tried with 5 ms and 500 ms delay but the same problem
 

Thank you for replay
still not working :(

- - - Updated - - -

internetuser2k12 said:
Try this code

Code: 
void main()
{
TRISE = 0X03;
PORTE.F2 = 0;
TRISC = 0x08;

while(1)
{
if(PORTE.F1 == 1)
	Delay_ms(150);
		if(PORTE.F1 == 1)
 			PORTE.F2 = 0; //UP

if(PORTE.F0 == 1)
	Delay_ms(150);
		if(PORTE.F0 == 1)
		 	PORTE.F2 = 0; //dn

if(PORTC.F3 == 1)
	Delay_ms(150);
		if(PORTC.F3 == 1) 
			PORTE.F2 = 1; //ok

}
}

You need to give debounce for buttons.

When OK is pressed led will turn ON. pressing up or down will turn off the led.
Click to expand...
i tried but still not working

- - - Updated - - -

madhusuthanan said:
did you press another button & post it.
Click to expand...
?????????????

- - - Updated - - -

I am confused because it very simple and i created many programs using this function
 

please press up/down button & check it.

- - - Updated - - -

have you try it.
 

try this code.

Code C - [expand]
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void main()
{
TRISE = 0X03;
PORTE.F2 = 0;
TRISC.F3 = 1;
 
while(1)
{
if(PORTE.F1 == 1) PORTE.F2 = 0; //UP
 
if(PORTE.F0 == 1) PORTE.F2 = 0; //dn
 
if(PORTC.F3 == 1) PORTE.F2 = 1; //ok
delay ms(100);
}
}
 
Last edited by a moderator:

madhusuthanan said:
try this code.

void main()
{
TRISE = 0X03;
PORTE.F2 = 0;
TRISC.F3 = 1;

while(1)
{
if(PORTE.F1 == 1) PORTE.F2 = 0; //UP

if(PORTE.F0 == 1) PORTE.F2 = 0; //dn

if(PORTC.F3 == 1) PORTE.F2 = 1; //ok
delay ms(100);
}
}
Click to expand...
There is (_) missing in(delay ms(100); and i completed it but still not working??
 

sorry its delay_ms(100);

- - - Updated - - -

its on on when its power up itself.
 

ABOELLEEL said:
Hi all,
My project is very simple that is keypad UP,DN & OK, LED
When i press ok LED is ON and OFF if i pressed UP or DN
UP----> porte.f1
DN----> porte.f0
OK----> portc.f3
LED---> porte.f2
and this is the code
void main()
{
TRISE = 0X03;
PORTE.F2 = 0;
TRISC.F3 = 1;

while(1)
{
if(PORTE.F1 == 1) PORTE.F2 = 0; //UP

if(PORTE.F0 == 1) PORTE.F2 = 0; //dn

if(PORTC.F3 == 1) PORTE.F2 = 1; //ok

}
}
The problem that i can turn LED on and cant off it
I am using mikroC V8.2.0.0
:?::?::?::?::?::?::?::?::?:
Click to expand...

You are right... this should be simple. And when even a simple thing doesn't work it can be very frustating. I'm sure we can fix it ....

But first, can you tell me what is the purpose of the following lines --

TRISE = 0x03

and
TRISC.F3 = 1

Second -- How have you connected your switchs ? Are they switch-to-GND with pullup-to-Vcc ? Or something different ? If its switch-to-GND then when the switch is ON, your input level will be 0 and not 1. So you will have to check for PORTE.Fx == 0 etc

I believe focusing on these 2 questions will give you the answer to fix it.

cheers!
 

in port E 1st & 2nd bit are set as input & others are o/p.

switch is connected to pull down to gnd. the other terminal of the switch is connected to vcc.
 
madhusuthanan said:
in port E 1st & 2nd bit are set as input & others are o/p.

switch is connected to pull down to gnd. the other terminal of the switch is connected to vcc.
Click to expand...

Hmmmm.... so then the error seems obvious ? Or am I missing something ?

1) You need to do TRISE = 0x0B ; otherwise how will bit f3 ever be input ?!?

and
2) Still not sure exactly HOW the switch is connected. But I think you mean - switch has a pull-down resistor to GND. In which case make sure it is not a very large value
 

rohitkhanna said:
TRISE = 0x03
Click to expand...
That make pin 0 & 1 are I/P for DN & UP switches and pin 2 O/P for the LED
and
rohitkhanna said:
TRISC.F3 = 1
Click to expand...
To make pin 3 I/P for OK switch
rohitkhanna said:
Second -- How have you connected your switchs ? Are they switch-to-GND with pullup-to-Vcc ? Or something different ? If its switch-to-GND then when the switch is ON, your input level will be 0 and not 1. So you will have to check for PORTE.Fx == 0 etc
Click to expand...
Micro pin is pulled down with resistor and switch get 5V to the pin
rohitkhanna said:
I believe focusing on these 2 questions will give you the answer to fix it.

cheers!
Click to expand...
thank you for your interest :)
 

ABOELLEEL said:
That make pin 0 & 1 are I/P for DN & UP switches and pin 2 O/P for the LED
and

To make pin 3 I/P for OK switch
Click to expand...

Ok.... i see. But why is the method different for making 0 &1 as input and different for making 3 input ?
I'm a PIC and microCv8 virgin, so pardon my ignorance. Oh i see now... f3 is on C and not E

Finally read a bit of the PIC user manual, and noticed that PORTC.F3 is ALSO the SCK/SCL bit.
Maybe you should try disconnecting your programmer before you try the buttons/ etc. Sometimes the programmer might be holding the pin low.
 
Last edited:

I cant run micro before disconnecting the programmer (it may be lower MCLR pin)
This part are from already running program ???!!! :cry:
I will try tomorrow get it in interrupt subroutine then use flags
 

ABOELLEEL said:
I cant run micro before disconnecting the programmer (it may be lower MCLR pin)
This part are from already running program ???!!! :cry:
I will try tomorrow get it in interrupt subroutine then use flags
Click to expand...

What ???? You have a very strange circuit dude. So you feel a more complicated method might work better ? Good thought... :)
Sorry, can't help anymore... did the best i could. Hope it works out.

cheers!
:)
 

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