18F25K22 Help

[richard]

just noticed the wend fell off

while 1  ; loop forever
wend

[ERMEGM]

The settings are the way they are because that code is from a much larger piece of code. I am utilizing 23 I/O pins, so those are the settings for those pins.

Since the larger portion of code was not working, I dumbed it down to see where my problem was. It's a lot easier for me to diagnose this way. I just can't figure out why it resets itself after the last command. I even put a loop at the end which would only exit after a button was pressed. It would hold there for one time and then after the button was pressed once, it would run through the sequencing and reset as stated earlier without holding in the hold loop.

[richard]

an erased chip is all nop's
a program not in a closed loop will execute all the remaining nop's till it hits the end of pgm memory, it then wraps back to location 0000 ie looks like a reset

adcon1=15 is an invalid setting and may cause issues

I had assumed the leds were on b0,b1, a0,a1 my mistake in the tris settings

[ERMEGM]

Actually, I tried multiple settings. I searched throughout this site and even found one instance where Darrel suggested adcon1 = 15, so I tried that. After my post, I changed it to:

  ADCON1 = %00001110             ' set to digital outputs

The end code I had after the last LED pause was:

 while program = 1

  pause 100

 wend      

    relay1 = 0
    relay2 = 0
    relay3 = 0
    relay4 = 0
      
    led1 = 0
    led2 = 0
    led3 = 0
    led4 = 0

goto action

As stated, when the program is initially run, the program waits until the button was pressed. Once pressed, it then runs through the sequence continuously, never stopping at the while loop.

Now, I did put in the necessary variable at the top of the code so it would acknowledge the button and when it would be pressed, I'm just out of ideas. Anybody have any?

Thanks,
Tony

[Demon]

Simplify, blink one LED on/off.

Robert


Edit: I had posted code for this pic but can't find it (on cell phone).

[richard]

that snippet shows no possible way to exit the while loop . how CAN THE PROGRAM VAR EVER CHANGE ???

ADCON1 = %00001110 ' set to digital outputs IS STILL WRONG read the data sheet adcon1 has no effect on setting inputs to digital at all

post the whole test code

[ERMEGM]

;----[18F25K22 Hardware Configuration]------------------------------------------
#IF __PROCESSOR__ = "18F25K22"
  #DEFINE MCU_FOUND 1
#CONFIG
  CONFIG  FOSC = INTIO67     ; Internal oscillator block
  CONFIG  PLLCFG = OFF       ; Oscillator used directly
  CONFIG  PRICLKEN = ON     ; Primary clock can be disabled by software
  CONFIG  FCMEN = OFF        ; Fail-Safe Clock Monitor disabled
  CONFIG  IESO = OFF         ; Oscillator Switchover mode disabled
  CONFIG  PWRTEN = OFF       ; Power up timer disabled
  CONFIG  BOREN = SBORDIS    ; Brown-out Reset enabled in hardware only (SBOREN is disabled)
  CONFIG  BORV = 190         ; VBOR set to 1.90 V nominal
  CONFIG  WDTEN = ON         ; WDT is always enabled. SWDTEN bit has no effect
  CONFIG  WDTPS = 32768      ; 1:32768
  CONFIG  CCP2MX = PORTC1    ; CCP2 input/output is multiplexed with RC1
  CONFIG  PBADEN = OFF       ; PORTB<5:0> pins are configured as digital I/O on Reset
  CONFIG  CCP3MX = PORTB5    ; P3A/CCP3 input/output is multiplexed with RB5
  CONFIG  HFOFST = ON        ; HFINTOSC output and ready status are not delayed by the oscillator stable status
  CONFIG  T3CMX = PORTC0     ; T3CKI is on RC0
  CONFIG  P2BMX = PORTB5     ; P2B is on RB5
  CONFIG  MCLRE = INTMCLR    ; RE3 input pin enabled; MCLR disabled
  CONFIG  STVREN = ON        ; Stack full/underflow will cause Reset
  CONFIG  LVP = OFF          ; Single-Supply ICSP disabled
  CONFIG  XINST = OFF        ; Instruction set extension and Indexed Addressing mode disabled (Legacy mode)
  CONFIG  DEBUG = OFF        ; Disabled
  CONFIG  CP0 = OFF          ; Block 0 (000800-001FFFh) not code-protected
  CONFIG  CP1 = OFF          ; Block 1 (002000-003FFFh) not code-protected
  CONFIG  CP2 = OFF          ; Block 2 (004000-005FFFh) not code-protected
  CONFIG  CP3 = OFF          ; Block 3 (006000-007FFFh) not code-protected
  CONFIG  CPB = OFF          ; Boot block (000000-0007FFh) not code-protected
  CONFIG  CPD = OFF          ; Data EEPROM not code-protected
  CONFIG  WRT0 = OFF         ; Block 0 (000800-001FFFh) not write-protected
  CONFIG  WRT1 = OFF         ; Block 1 (002000-003FFFh) not write-protected
  CONFIG  WRT2 = OFF         ; Block 2 (004000-005FFFh) not write-protected
  CONFIG  WRT3 = OFF         ; Block 3 (006000-007FFFh) not write-protected
  CONFIG  WRTC = OFF         ; Configuration registers (300000-3000FFh) not write-protected
  CONFIG  WRTB = OFF         ; Boot Block (000000-0007FFh) not write-protected
  CONFIG  WRTD = OFF         ; Data EEPROM not write-protected
  CONFIG  EBTR0 = OFF        ; Block 0 (000800-001FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTR1 = OFF        ; Block 1 (002000-003FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTR2 = OFF        ; Block 2 (004000-005FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTR3 = OFF        ; Block 3 (006000-007FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTRB = OFF        ; Boot Block (000000-0007FFh) not protected from table reads executed in other blocks
#ENDCONFIG

#ENDIF

;----[Verify Configs have been specified for Selected Processor]----------------
;       Note: Only include this routine once, after all #CONFIG blocks
#IFNDEF MCU_FOUND
  #ERROR "No CONFIGs found for [" + __PROCESSOR__ +"]"
#ENDIF

' -----[ Initialization ]-------------------------------------------------------
 
Reset:

  OSCCON = %01010000             ' 4MHz 
  ADCON1 = %00001110             ' set to digital outputs
  TRISA = %00000000              ' sets pin as input (1) or output (0)
  TRISB = %00000001              ' sets pin as input (1) or output (0)
  TRISC = %10001100              ' sets pin as input (1) or output (0)
  PORTA = %00000000              ' sets outputs as high (1) or low (0)
  PORTB = %00000000              ' sets outputs as high (1) or low (0)
  PORTC = %00000000              ' sets outputs as high (1) or low (0)

' -----[ Variables ]------------------------------------------------------------
 
    led1          var   porta.1  ' LED 1
    led2          var   porta.2  ' LED 2
    led3          var   portb.1  ' LED 3
    led4          var   portb.2  ' LED 4

    program       var   porta.0  ' button to restart sequence

action:
      
    led1 = 1
    pause 500

    led2 = 1
    pause 500

    led3 = 1
    pause 500

    led4 = 1
    pause 500

 while program = 1          ' loop here until the button is pressed

  pause 100

 wend
      
    led1 = 0
    led2 = 0
    led3 = 0
    led4 = 0

goto action

The current code is written as such: Turn on each LED in sequence and leave them on until the button is pressed. It is a pull down input. When the button is pressed, turn off all the LEDs and repeat the sequence.

Right now, LED1 turns on and then when LED2 goes to turn on, LED1 turns off. LEDs 2-4 sequence on and stay on, but LED1 stays off. On the first run, the LEDs turn on and stay on until the button is pressed. After the initial press, the LEDs turn on in sequence (except for LED1) and once LED4 is lit, they all turn off and the sequence in repeated.

Can't figure it out unless it's because of my pins not all being set to digital. I'm asking for help on what the proper code is for setting them all to digital. I keep finding posts where people say read the datasheet. I've read the datasheet and I've entered what I think it is telling me for how to set the pins to all digital. I'm now asking for help.

[richard]

GOOGLE "PIC READ MODIFY WRITE"

;----[18F25K22 Hardware Configuration]------------------------------------------
#IF __PROCESSOR__ = "18F25K22"
  #DEFINE MCU_FOUND 1
#CONFIG
  CONFIG  FOSC = INTIO67     ; Internal oscillator block
  CONFIG  PLLCFG = OFF       ; Oscillator used directly
  CONFIG  PRICLKEN = ON     ; Primary clock can be disabled by software
  CONFIG  FCMEN = OFF        ; Fail-Safe Clock Monitor disabled
  CONFIG  IESO = OFF         ; Oscillator Switchover mode disabled
  CONFIG  PWRTEN = OFF       ; Power up timer disabled
  CONFIG  BOREN = SBORDIS    ; Brown-out Reset enabled in hardware only (SBOREN is disabled)
  CONFIG  BORV = 190         ; VBOR set to 1.90 V nominal
  CONFIG  WDTEN = ON         ; WDT is always enabled. SWDTEN bit has no effect
  CONFIG  WDTPS = 32768      ; 1:32768
  CONFIG  CCP2MX = PORTC1    ; CCP2 input/output is multiplexed with RC1
  CONFIG  PBADEN = OFF       ; PORTB<5:0> pins are configured as digital I/O on Reset
  CONFIG  CCP3MX = PORTB5    ; P3A/CCP3 input/output is multiplexed with RB5
  CONFIG  HFOFST = ON        ; HFINTOSC output and ready status are not delayed by the oscillator stable status
  CONFIG  T3CMX = PORTC0     ; T3CKI is on RC0
  CONFIG  P2BMX = PORTB5     ; P2B is on RB5
  CONFIG  MCLRE = INTMCLR    ; RE3 input pin enabled; MCLR disabled
  CONFIG  STVREN = ON        ; Stack full/underflow will cause Reset
  CONFIG  LVP = OFF          ; Single-Supply ICSP disabled
  CONFIG  XINST = OFF        ; Instruction set extension and Indexed Addressing mode disabled (Legacy mode)
  CONFIG  DEBUG = OFF        ; Disabled
  CONFIG  CP0 = OFF          ; Block 0 (000800-001FFFh) not code-protected
  CONFIG  CP1 = OFF          ; Block 1 (002000-003FFFh) not code-protected
  CONFIG  CP2 = OFF          ; Block 2 (004000-005FFFh) not code-protected
  CONFIG  CP3 = OFF          ; Block 3 (006000-007FFFh) not code-protected
  CONFIG  CPB = OFF          ; Boot block (000000-0007FFh) not code-protected
  CONFIG  CPD = OFF          ; Data EEPROM not code-protected
  CONFIG  WRT0 = OFF         ; Block 0 (000800-001FFFh) not write-protected
  CONFIG  WRT1 = OFF         ; Block 1 (002000-003FFFh) not write-protected
  CONFIG  WRT2 = OFF         ; Block 2 (004000-005FFFh) not write-protected
  CONFIG  WRT3 = OFF         ; Block 3 (006000-007FFFh) not write-protected
  CONFIG  WRTC = OFF         ; Configuration registers (300000-3000FFh) not write-protected
  CONFIG  WRTB = OFF         ; Boot Block (000000-0007FFh) not write-protected
  CONFIG  WRTD = OFF         ; Data EEPROM not write-protected
  CONFIG  EBTR0 = OFF        ; Block 0 (000800-001FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTR1 = OFF        ; Block 1 (002000-003FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTR2 = OFF        ; Block 2 (004000-005FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTR3 = OFF        ; Block 3 (006000-007FFFh) not protected from table reads executed in other blocks
  CONFIG  EBTRB = OFF        ; Boot Block (000000-0007FFh) not protected from table reads executed in other blocks
#ENDCONFIG

#ENDIF

;----[Verify Configs have been specified for Selected Processor]----------------
;       Note: Only include this routine once, after all #CONFIG blocks
#IFNDEF MCU_FOUND
  #ERROR "No CONFIGs found for [" + __PROCESSOR__ +"]"
#ENDIF

' -----[ Initialization ]-------------------------------------------------------
 
Reset:

  OSCCON = %01010000             ' 4MHz 
  ADCON1 = %00001110             ' set to digital outputs            this is totally wrong
  TRISA = %00000000              ' sets pin as input (1) or output (0)
  TRISB = %00000001              ' sets pin as input (1) or output (0)
  TRISC = %10001100              ' sets pin as input (1) or output (0)
  PORTA = %00000000              ' sets outputs as high (1) or low (0)
  PORTB = %00000000              ' sets outputs as high (1) or low (0)
  PORTC = %00000000              ' sets outputs as high (1) or low (0)
ANSELA=0      WILL SET PORTA DIGITAL
ANSELB=0      WILL SET PORTB DIGITAL



' -----[ Variables ]------------------------------------------------------------
 
    led1          var   porta.1  ' LED 1    JUST ASKING FOR READ MODIFY WRITE ISSUES
    led2          var   porta.2  ' LED 2
    led3          var   portb.1  ' LED 3
    led4          var   portb.2  ' LED 4


    led1          var   LATA.1  ' LED 1    CAN ELIMINATE READ MODIFY WRITE ISSUES
    led2          var   LATA.2  ' LED 2
    led3          var   LATB.1  ' LED 3
    led4          var   LATB.2  ' LED 4
    program       var   porta.0  ' button to restart sequence

action:
      
    led1 = 1
    pause 500

    led2 = 1
    pause 500

    led3 = 1
    pause 500

    led4 = 1
    pause 500

 while program = 1          ' loop here until the button is pressed

  pause 100

 wend
      
    led1 = 0
    led2 = 0
    led3 = 0
    led4 = 0

goto action

[andybarrett1]

Hi

Aside from the analog port issues..... If you want the LED's to sequence, you need to put them low at some point otherwise they all going to be mostly high all the time ?

Maybe as others far wiser than me will suggest (Robert)..... get the code to turn one LED on and off (Flash)
Move this simple code around the ports.. Then once you know this is working OK... Progress on further.

flash: ledx high
pause 500
ledx low
pause 500
goto flash

BR
Andy