porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

Closed Thread
Results 1 to 10 of 10

Hybrid View

  1. - 22nd January 2015, 14:35 #1
    bmoe79's Avatar
    bmoe79
    bmoe79 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    12

    Default porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

    Hi.

    I have a problem that if I set porta.0 and portb.2 high with porta.0=1 and porta.2=1 then they will not go high, but if I do HIGH porta.0 and HIGH porta.2 then they will.
    porta.1 and porta.3 works as expected.
    Anyone know why?

    In the display the code below gives me:
    00001111
    HIGH

    00000000
    LOW

    00001010
    =1

    00000000
    =0


    Code:
    ' PIC18F45K80 Configuration Bit Settings


#CONFIG
    CONFIG RETEN = OFF
    CONFIG INTOSCSEL = HIGH
    CONFIG SOSCSEL = DIG
    CONFIG XINST = OFF
    CONFIG FOSC = EC3
    CONFIG PLLCFG = OFF
    CONFIG FCMEN = OFF
    CONFIG IESO = OFF
    CONFIG PWRTEN = ON
    CONFIG BOREN = OFF
    CONFIG BORV = 3
    CONFIG BORPWR = ZPBORMV
    CONFIG WDTEN = OFF
    CONFIG WDTPS = 1048576
    CONFIG CANMX = PORTB
    CONFIG MSSPMSK = MSK7
    CONFIG MCLRE = ON
    CONFIG STVREN = OFF
    CONFIG BBSIZ = BB2K
    CONFIG CP0 = OFF
    CONFIG CP1 = OFF
    CONFIG CP2 = OFF
    CONFIG CP3 = OFF
    CONFIG CPB = OFF
    CONFIG CPD = OFF
    CONFIG WRT0 = OFF
    CONFIG WRT1 = OFF
    CONFIG WRT2 = OFF
    CONFIG WRT3 = OFF
    CONFIG WRTC = OFF
    CONFIG WRTB = OFF
    CONFIG WRTD = OFF
    CONFIG EBTR0 = OFF
    CONFIG EBTR1 = OFF
    CONFIG EBTR2 = OFF
    CONFIG EBTR3 = OFF
    CONFIG EBTRB = OFF
#ENDCONFIG




'************************* DEFINES ******************************
define OSC 64


define LCD_DREG PORTC
define LCD_DBIT 0
define LCD_RSREG PORTC
define LCE_RSBIT 4
define LCD_EREG PORTC
define LCD_EBIT 5
define LCD_BITS 4
define LCD_LINES 2
define LCD_COMMANDUS 3000
define LCD_DATAUS 100




'********************** PIN VARIABLES ***************************




'************************ VARIABLES *****************************




'************************ REGISTERS *****************************
ANCON0 = 000000
ANCON1 = 000000
ADCON0 = 000000
ADCON1 = 000000




'*********************** PORT CONFIG ****************************
TRISA = 100000                                   'porta direction 0=OUTPUT 1=INPUT
PORTA = 000000                                   'porta preset
TRISB = 010111                                   'portb direction 0=OUTPUT 1=INPUT
PORTB = 000000                                   'portb preset
TRISC = 000000                                   'portc direction 0=OUTPUT 1=INPUT
PORTC = 000000                                   'portc preset
TRISD = 111111                                   'portd direction 0=OUTPUT 1=INPUT
PORTD = 110000                                   'portd preset
TRISE = 001111                                   'porte direction 0=OUTPUT 1=INPUT
PORTE = 000000                                   'porte preset




'*********************** TIMER CONFIG ***************************




'********************* INTERRUPT CONFIG *************************




'****************************************************************
'*******************    MAIN PROGRAM     ************************
'****************************************************************
pause 500
lcdout $fe, $01                                     
while 1
    high porta.0
    high porta.1
    high porta.2
    high porta.3
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "HIGH"
    PAUSE 1000
    low porta.0
    low porta.1
    low porta.2
    low porta.3
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "LOW "
    PAUSE 1000
    porta.0 = 1
    porta.1 = 1
    porta.2 = 1
    porta.3 = 1
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "= 1 "
    PAUSE 1000
    porta.0 = 0
    porta.1 = 0
    porta.2 = 0
    porta.3 = 0
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "= 0 "
    PAUSE 1000
wend


'****************************************************************
'*******************     SUB ROUTINES      **********************
'****************************************************************




'****************************************************************
'*****************     INTERRUPT ROUTINE     ********************
'****************************************************************


end
  2. - 22nd January 2015, 15:17 #2
    Dave's Avatar
    Dave
    Dave is offline Prolific Poster
    Join Date
    Mar 2003
    Location
    Commerce Michigan USA
    Posts
    1,166

    Did you find this post helpful? Yes | No

    Default Re: porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

    Bmoe79, I notice that you are only setting 6 of the 8 bits of each port as well as not setting up the statement as: PORTE = %00000000 The "%" has to proceed the binary representation of the bit values to be valid. I notice you do not use it in any of your statements for setting the TRIS or PORT values.
    Dave Purola,
    N8NTA
    EN82fn
  3. - 22nd January 2015, 16:27 #3
    bmoe79's Avatar
    bmoe79
    bmoe79 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    12

    Did you find this post helpful? Yes | No

    Default Re: porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

    How weird, in the code everything is ok so it must have happened when I pasted the code.
    Here is the code again

    Code:
    ' PIC18F45K80 Configuration Bit Settings


#CONFIG
    CONFIG RETEN = OFF
    CONFIG INTOSCSEL = HIGH
    CONFIG SOSCSEL = DIG
    CONFIG XINST = OFF
    CONFIG FOSC = EC3
    CONFIG PLLCFG = OFF
    CONFIG FCMEN = OFF
    CONFIG IESO = OFF
    CONFIG PWRTEN = ON
    CONFIG BOREN = OFF
    CONFIG BORV = 3
    CONFIG BORPWR = ZPBORMV
    CONFIG WDTEN = OFF
    CONFIG WDTPS = 1048576
    CONFIG CANMX = PORTB
    CONFIG MSSPMSK = MSK7
    CONFIG MCLRE = ON
    CONFIG STVREN = OFF
    CONFIG BBSIZ = BB2K
    CONFIG CP0 = OFF
    CONFIG CP1 = OFF
    CONFIG CP2 = OFF
    CONFIG CP3 = OFF
    CONFIG CPB = OFF
    CONFIG CPD = OFF
    CONFIG WRT0 = OFF
    CONFIG WRT1 = OFF
    CONFIG WRT2 = OFF
    CONFIG WRT3 = OFF
    CONFIG WRTC = OFF
    CONFIG WRTB = OFF
    CONFIG WRTD = OFF
    CONFIG EBTR0 = OFF
    CONFIG EBTR1 = OFF
    CONFIG EBTR2 = OFF
    CONFIG EBTR3 = OFF
    CONFIG EBTRB = OFF
#ENDCONFIG


'************************* DEFINES ******************************
define OSC 64


define LCD_DREG PORTC
define LCD_DBIT 0
define LCD_RSREG PORTC
define LCE_RSBIT 4
define LCD_EREG PORTC
define LCD_EBIT 5
define LCD_BITS 4
define LCD_LINES 2
define LCD_COMMANDUS 3000
define LCD_DATAUS 100


'************************ REGISTERS *****************************
ANCON0 = 000000
ANCON1 = 000000
ADCON0 = 000000
ADCON1 = 000000


'*********************** PORT CONFIG ****************************
TRISA = 100000                                   'porta direction 0=OUTPUT 1=INPUT
PORTA = 000000                                   'porta preset
TRISB = 010111                                   'portb direction 0=OUTPUT 1=INPUT
PORTB = 000000                                   'portb preset
TRISC = 000000                                   'portc direction 0=OUTPUT 1=INPUT
PORTC = 000000                                   'portc preset
TRISD = 111111                                   'portd direction 0=OUTPUT 1=INPUT
PORTD = 110000                                   'portd preset
TRISE = 001111                                   'porte direction 0=OUTPUT 1=INPUT
PORTE = 000000                                   'porte preset


'****************************************************************
'*******************    MAIN PROGRAM     ************************
'****************************************************************
pause 500
lcdout $fe, $01                                     
while 1
    high porta.0
    high porta.1
    high porta.2
    high porta.3
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "HIGH"
    PAUSE 1000
    low porta.0
    low porta.1
    low porta.2
    low porta.3
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "LOW "
    PAUSE 1000
    porta.0 = 1
    porta.1 = 1
    porta.2 = 1
    porta.3 = 1
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "= 1 "
    PAUSE 1000
    porta.0 = 0
    porta.1 = 0
    porta.2 = 0
    porta.3 = 0
    lcdout $fe, $80, bin8 porta
    lcdout $fe, $c0, "= 0 "
    PAUSE 1000
wend


end
    Last edited by bmoe79; - 22nd January 2015 at 16:41.
  4. - 22nd January 2015, 17:02 #4
    bmoe79's Avatar
    bmoe79
    bmoe79 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    12

    Did you find this post helpful? Yes | No

    Default Re: porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

    Same thing again. So weird.
    TRISx, PORTx, ANCONx and ADCONx is like below in my code

    TRISA = %11100000 'porta direction 0=OUTPUT 1=INPUT
    PORTA = %00000000 'porta preset
    TRISB = %11010111 'portb direction 0=OUTPUT 1=INPUT
    PORTB = %00000000 'portb preset
    TRISC = %00000000 'portc direction 0=OUTPUT 1=INPUT
    PORTC = %00000000 'portc preset
    TRISD = %00111111 'portd direction 0=OUTPUT 1=INPUT
    PORTD = %00110000 'portd preset
    TRISE = %00001111 'porte direction 0=OUTPUT 1=INPUT
    PORTE = %00000000 'porte preset

    ANCON0 = %00000000
    ANCON1 = %00000000
    ADCON0 = %00000000
    ADCON1 = %00000000
  5. - 22nd January 2015, 17:37 #5
    Tabsoft's Avatar
    Tabsoft
    Tabsoft is offline Member
    Join Date
    Jan 2013
    Location
    Texas USA
    Posts
    229

    Did you find this post helpful? Yes | No

    Default Re: porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

    This might be a read-modify-write issue.
    The 18FK4580 has Output Latch registers.
    You should try writing to the port via the LATA register instead of the PORTA register.
    Regards,
    TABSoft
  6. - 22nd January 2015, 17:42 #6
    bmoe79's Avatar
    bmoe79
    bmoe79 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    12

    Did you find this post helpful? Yes | No

    Default Re: porta.0 and porta.2 only goes high with HIGH command with PIC18F45K80

    After taking a quick look in the datasheet it seems like that coulld be it.
    I will test that tomorrow.
    Thanks.
« Previous Thread | Next Thread »

Similar Threads

  1. PortA Doesn't Work
    By Melanie in forum FAQ - Frequently Asked Questions
    Replies: 11
    Last Post: - 8th September 2015, 18:41
  2. PIC - receive data while pulsing pin from low to high and from high to low
    By skaarj in forum Code Examples
    Replies: 10
    Last Post: - 14th April 2014, 20:47
  3. high voltage high frequency H-Bridge
    By George in forum Off Topic
    Replies: 6
    Last Post: - 27th April 2009, 11:50
  4. AD works in Porta.0 but not in porta.1
    By ruijc in forum mel PIC BASIC Pro
    Replies: 6
    Last Post: - 19th February 2008, 20:22
  5. turning gpio.0 high after pwm command
    By sirvo in forum mel PIC BASIC Pro
    Replies: 7
    Last Post: - 21st February 2007, 18:22

Members who have read this thread : 0

You do not have permission to view the list of names.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Forum Rules