PIC16F1824, problem with oscillator and RA3,RA4,RA5

[billys7]

I don't know what is wrong.
I made the following code and i have 2 problems.
-Pause 500 is not 0.5 second, it comes about 2 seconds
When i replace RA0,RA1,RA2 with RA3,RA4,RA5
-I can't make RA3,4,5 to work as an input.

What is wrong ?

@DEVICEINTOSC 'Internal oscillator: I/O function on CLKIN pin
@DEVICELVP_OFF 'Low-voltage programming. Not used
@DEVICEWDT_OFF 'Watchdog timer software-controlled. Not used
@DEVICEPWRT_OFF 'Enable the power-up timer. Not used
@DEVICECPD_OFF 'Data code protection
@DEVICECP_OFF 'Code protection
@DEVICEMCLR_OFF 'Use MCLR pin as MCLR. Not used
@DEVICEBOD_OFF 'Disable Brown-out reset
@DEVICEFCMEN_OFF 'Enables internal oscillator on external death. Not Used
@IESO_OFF 'Two-speed start-up. Not used

DEFINE OSC 4
TRISA = 1 'All inputs
TRISC = 0 'All outputs
ANSELA = 0 'Digital in-out
ANSELC = 0 'Digital in-out

GOTO START

START:
IF PORTA.0 = 1 THEN
GOTO LOOP1
ELSE
GOTO LOOP2
ENDIF
GOTO START
END

LOOP1:
IF PORTA.1 = 1 THEN
PORTC.0 = 1
ELSE
PORTC.0 = 0
pause 500
PORTC.0 = 1
pause 500
PORTC.0 = 0
ENDIF
GOTO START
END

LOOP2:
IF PORTA.2 = 1 THEN
PORTC.0 = 1
ELSE
PORTC.0 = 0
ENDIF
GOTO START
End

[gunayburak]

For the Oscillator problem , you need to configure OSCCON register ...
The default upon reset osc freq. is 500 khz for that PIC mcu .. (That's what datasheet refers on Page 71) . To operate @ 4MHZ you must add the command line below
OSCCON=%01101000

Have a nice day

[billys7]

Thank you, I will try it.

[billys7]

Ok, with the oscillator, but the problem with RA3,RA4 and RA5 continue.
I replace the pic with another 1824 with no better result.

[Demon]

Is this the read-modify-write issue?

(I never remember the details)

I would try turn on 1 second, off 1 second, goto start (keep it simple blinker to start).

Robert

[gunayburak]

As datasheet explains ,simply , inserting the lines below gotta be sufficient to configure RA<5:3> as inputs

BANKSEL PORTA ;
CLRF PORTA ;Init PORTA
BANKSEL LATA ;Data Latch
CLRF LATA ;
BANKSEL ANSELA ;
CLRF ANSELA ;digital I/O
BANKSEL TRISA ;
MOVLW B'00111000' ;Set RA<5:3> as inputs
MOVWF TRISA ;and set RA<2:0> as outputs

Since the way you define your Fuse settings are a bit different than the way I do with my PBP version , the problem might have got to do with yours .. So If you make certain of your "device" declarations , try removing the "end" lines from your code ...
If it still doesn't help , we'll try to figure out an another solution ..

Have a nice day ..

[billys7]

Thank you for your reply, I will try it.
But the mystery is that RA0,RA1,RA2 working.
I will try it with simpler code.

[billys7]

Thank you gunayburak for your answer.
I add it to the code and i will try it.

I also focus the problem in fuse settings.
How will you define the fuse settings ?

[gunayburak]

RA<2:0> MUST WORK ! Because you still use PORTA.0 , PORTA.1 , PORTA.2 declarations in your If conditions ... not PORTA.3 , PORTA4 , PORTA.5 instead ...

[gunayburak]

'************************************************* ***************
'* Name : UNTITLED.BAS *
'* Author : BURAK GÜNAY *
'* Notice : Copyright (c) 2014 [select VIEW...EDITOR OPTIONS] *
'* : All Rights Reserved *
'* Date : 6.5.2014 *
'* Version : 1.0 *
'* Notes : 16F1824 RA<5:3> input mode *
'* : *
'************************************************* ***************

#header
errorlevel -303 ; suppress Program word too large
#ENDHEADER

#config
__CONFIG _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _PWRTE_ON & _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOREN_OFF & _CLKOUTEN_OFF & _IESO_OFF & _FCMEN_OFF
__CONFIG _CONFIG2, _WRT_OFF & _PLLEN_OFF & _STVREN_OFF & _BORV_19 & _LVP_OFF
#ENDCONFIG
'---------------------------------------------------------------------

DEFINE OSC 4

PORTA=%000000 : ANSELA=%00000 : TRISA=%111000
PORTC=%00000000 : ANSELC=%0000000 : TRISC=%00000000

START:

IF PORTA.3=1 THEN
GOTO LOOP1
ELSE
GOTO LOOP2
ENDIF

GOTO START


LOOP1:

IF PORTA.4=1 THEN
PORTC.0=1
ELSE
PORTC.0=0
pause 500
PORTC.0= 1
pause 500
PORTC.0= 0
ENDIF

GOTO START


LOOP2:

IF PORTA.5 = 1 THEN
PORTC.0 = 1
ELSE
PORTC.0 = 0
ENDIF

GOTO START







This is the code you should be using ..

[gunayburak]

Since the spaces are gone in previous post , the compiler may display errors on compile .. Here is the code again .


'************************************************* ***************
'* Name : UNTITLED.BAS *
'* Author : BURAK GÜNAY *
'* Notice : Copyright (c) 2014 [select VIEW...EDITOR OPTIONS] *
'* : All Rights Reserved *
'* Date : 6.5.2014 *
'* Version : 1.0 *
'* Notes : 16F1824 RA<5:3> input mode *
'* : *
'************************************************* ***************

#header
errorlevel -303 ; suppress Program word too large
#ENDHEADER

#config
__CONFIG _CONFIG1, _FOSC_INTOSC & _WDTE_OFF & _PWRTE_ON & _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOREN_OFF & _CLKOUTEN_OFF & _IESO_OFF & _FCMEN_OFF
__CONFIG _CONFIG2, _WRT_OFF & _PLLEN_OFF & _STVREN_OFF & _BORV_19 & _LVP_OFF
#ENDCONFIG
'---------------------------------------------------------------------

DEFINE OSC 4

PORTA=%000000 : ANSELA=%00000 : TRISA=%111000
PORTC=%00000000 : ANSELC=%0000000 : TRISC=%00000000

START:

IF PORTA.3=1 THEN
GOTO LOOP1
ELSE
GOTO LOOP2
ENDIF

GOTO START


LOOP1:

IF PORTA.4=1 THEN
PORTC.0=1
ELSE
PORTC.0=0
pause 500
PORTC.0= 1
pause 500
PORTC.0= 0
ENDIF

GOTO START


LOOP2:

IF PORTA.5 = 1 THEN
PORTC.0 = 1
ELSE
PORTC.0 = 0
ENDIF

GOTO START

[billys7]

When i compile it, it shows me syntax error in the lines from #header till #ENDCONFIG

[billys7]

Ok. I compile it. According to http://melabs.com/support/config_defaults.htm i change the settings in PBP 16F1824.inc file and i add @ at the beggining of config.

I will inform you for the results.
Thank you!

[Acetronics2]

just wipe off


#header
errorlevel -303 ; suppress Program word too large
#ENDHEADER



as error 303 message is just " a warning " ( no effect on code )

BTW ...
is your compiler up to date ???

I do not have any error message with this processor ...

Alain

[gunayburak]

Yep ..But I get such errors


just wipe off


#header
errorlevel -303 ; suppress Program word too large
#ENDHEADER



as error 303 message is just " a warning " ( no effect on code )

BTW ...
is your compiler up to date ???

I do not have any error message with this processor ...

Alain

[billys7]

Totally solved.
The problem was the way i define the fuse settings.
Gunayburak was right.

Thank you all !!!