You are right Dennis - the kit won't emulate the WDT.
Regards,
Simon
On Thu, 05 May 2005 15:04:13 -0000, Dennis Clark <dlc@io.frii.com>
wrote:
>PigPOg <simon@capella.co.uk> wrote:
>Oh yeah,
>
> I use the Microchip ICD-2 for ICD, and it turns the WDT off when it
>sets up fuses. I'll bet that your ICE is also disabling the WDT.
>
>DLC
>
>: Hi Dennis
>
>: You're right - I didn't post that bit but the WDT is configured
>: correctly. What I did'nt mention was the fact that I'm using the
>: ICE2000 and PCM18XHO and I think that the kit does'nt emulate WDT
>: action. I'm still investigating...
>
>: Cheers,
>: Simon
>
>: On Wed, 04 May 2005 19:45:57 -0000, Dennis Clark <dlc@io.frii.com>
>: wrote:
>
>: >PigPOg <simon@capella.co.uk> wrote:
>: >
>: > I don't see where you've configured the fuses to enable the watchdog.
>: >Did you just not post that part?
>: >
>: >DLC
>: >
>: >: Hi, can anyone help please? I've started to use the high-end family of
>: >: 18f PICs and I just can't seem to get the WDT wake-up working. All I
>: >: want to do is pulse a Green LED once for 1/2 second on applying power
>: >: and then enter SLEEP for 2.3 seconds, wake-up, pulse a Red LED for 1/2
>: >: second then repeat the SLEEP, waking to flash the Red LED every 2.3
>: >: seconds. I've set the configuration bits accordingly and the DELAY
>: >: subroutine works fine and all interrupts are diabled. Just can't seem
>: >: to see where I'm going wrong. Any advice would be most appreciated.
>: >
>: >: Simon
>: >
>: >: list p=18f252
>: >: include <p18f252.inc>
>: >
>: >: ; Oscillator Source : 4 Mhz External Oscillator
>: >: ; Watchdog Timer: Disabled - Controlled by SWDTEN bit
>: >: ; Watchdog Postscaler: 1:128
>: >
>: >: ORG 0x000000 ;Reset vector
>: >: GOTO COLD_START
>: >: ORG 0x000008 ;High priority interrupt vector
>: >: GOTO COLD_START
>: >: ORG 0x000018 ;Low priority interrupt vector
>: >: GOTO COLD_START
>: >
>: >: ; Power-Up
>: >
>: >: COLD_START
>: >: BCF WDTCON,SWDTEN ;Ensure WDT is disabled.
>: >: CLRF PORTA ;Clear port data latches.
>: >: MOVLW H'07' ;Configure A/D for all
>: >: MOVWF ADCON1 ;port bits digital.
>: >: CLRF TRISA ;RA0-RA5=outputs.
>: >: CLRF PORTB
>: >: MOVLW B'00000011' ;RB0:RB1=inputs
>: >: MOVWF TRISB ;RB2-RB7=outputs.
>: >: CLRF PORTC
>: >: CLRF TRISC ;RC0-RC7=outputs.
>: >
>: >: ; Determine start condition
>: >: ;
>: >: ;| TO | PD |
>: >: BTFSC RCON,PD ;| 0 | 0 | WDT wake-up.
>: >: GOTO MAIN ;| 0 | 1 | WDT Reset.
>: >: BTFSC RCON,TO ;| 1 | 0 | MCLR wakeup.
>: >: GOTO MAIN ;| 1 | 1 | Power-on Reset.
>: >: ;
>: >: ; Service WDT wake-up
>: >: ;
>: >: BCF WDTCON,SWDTEN ;Ensure Watchdog=OFF.
>: >: BSF RED
>: >: MOVLW HALF_SEC
>: >: CALL DELAY
>: >: BCF RED
>: >: SNOOZE BSF WDTCON,SWDTEN
>: >: SLEEP
>: >: ;
>: >: ; Start-up
>: >: ;
>: >: MAIN BSF GREEN
>: >: MOVLW HALF_SEC
>: >: CALL DELAY
>: >: BCF GREEN
>: >: GOTO SNOOZE
>: >: ;
>: >: END
Reply by Dennis Clark●May 5, 20052005-05-05
PigPOg <simon@capella.co.uk> wrote:
Oh yeah,
I use the Microchip ICD-2 for ICD, and it turns the WDT off when it
sets up fuses. I'll bet that your ICE is also disabling the WDT.
DLC
: Hi Dennis
: You're right - I didn't post that bit but the WDT is configured
: correctly. What I did'nt mention was the fact that I'm using the
: ICE2000 and PCM18XHO and I think that the kit does'nt emulate WDT
: action. I'm still investigating...
: Cheers,
: Simon
: On Wed, 04 May 2005 19:45:57 -0000, Dennis Clark <dlc@io.frii.com>
: wrote:
: >PigPOg <simon@capella.co.uk> wrote:
: >
: > I don't see where you've configured the fuses to enable the watchdog.
: >Did you just not post that part?
: >
: >DLC
: >
: >: Hi, can anyone help please? I've started to use the high-end family of
: >: 18f PICs and I just can't seem to get the WDT wake-up working. All I
: >: want to do is pulse a Green LED once for 1/2 second on applying power
: >: and then enter SLEEP for 2.3 seconds, wake-up, pulse a Red LED for 1/2
: >: second then repeat the SLEEP, waking to flash the Red LED every 2.3
: >: seconds. I've set the configuration bits accordingly and the DELAY
: >: subroutine works fine and all interrupts are diabled. Just can't seem
: >: to see where I'm going wrong. Any advice would be most appreciated.
: >
: >: Simon
: >
: >: list p=18f252
: >: include <p18f252.inc>
: >
: >: ; Oscillator Source : 4 Mhz External Oscillator
: >: ; Watchdog Timer: Disabled - Controlled by SWDTEN bit
: >: ; Watchdog Postscaler: 1:128
: >
: >: ORG 0x000000 ;Reset vector
: >: GOTO COLD_START
: >: ORG 0x000008 ;High priority interrupt vector
: >: GOTO COLD_START
: >: ORG 0x000018 ;Low priority interrupt vector
: >: GOTO COLD_START
: >
: >: ; Power-Up
: >
: >: COLD_START
: >: BCF WDTCON,SWDTEN ;Ensure WDT is disabled.
: >: CLRF PORTA ;Clear port data latches.
: >: MOVLW H'07' ;Configure A/D for all
: >: MOVWF ADCON1 ;port bits digital.
: >: CLRF TRISA ;RA0-RA5=outputs.
: >: CLRF PORTB
: >: MOVLW B'00000011' ;RB0:RB1=inputs
: >: MOVWF TRISB ;RB2-RB7=outputs.
: >: CLRF PORTC
: >: CLRF TRISC ;RC0-RC7=outputs.
: >
: >: ; Determine start condition
: >: ;
: >: ;| TO | PD |
: >: BTFSC RCON,PD ;| 0 | 0 | WDT wake-up.
: >: GOTO MAIN ;| 0 | 1 | WDT Reset.
: >: BTFSC RCON,TO ;| 1 | 0 | MCLR wakeup.
: >: GOTO MAIN ;| 1 | 1 | Power-on Reset.
: >: ;
: >: ; Service WDT wake-up
: >: ;
: >: BCF WDTCON,SWDTEN ;Ensure Watchdog=OFF.
: >: BSF RED
: >: MOVLW HALF_SEC
: >: CALL DELAY
: >: BCF RED
: >: SNOOZE BSF WDTCON,SWDTEN
: >: SLEEP
: >: ;
: >: ; Start-up
: >: ;
: >: MAIN BSF GREEN
: >: MOVLW HALF_SEC
: >: CALL DELAY
: >: BCF GREEN
: >: GOTO SNOOZE
: >: ;
: >: END
--
============================================================================
* Dennis Clark dlc@frii.com www.techtoystoday.com *
* "Programming and Customizing the OOPic Microcontroller" Mcgraw-Hill 2003 *
============================================================================
Reply by PigPOg●May 5, 20052005-05-05
Hi Dennis
You're right - I didn't post that bit but the WDT is configured
correctly. What I did'nt mention was the fact that I'm using the
ICE2000 and PCM18XHO and I think that the kit does'nt emulate WDT
action. I'm still investigating...
Cheers,
Simon
On Wed, 04 May 2005 19:45:57 -0000, Dennis Clark <dlc@io.frii.com>
wrote:
>PigPOg <simon@capella.co.uk> wrote:
>
> I don't see where you've configured the fuses to enable the watchdog.
>Did you just not post that part?
>
>DLC
>
>: Hi, can anyone help please? I've started to use the high-end family of
>: 18f PICs and I just can't seem to get the WDT wake-up working. All I
>: want to do is pulse a Green LED once for 1/2 second on applying power
>: and then enter SLEEP for 2.3 seconds, wake-up, pulse a Red LED for 1/2
>: second then repeat the SLEEP, waking to flash the Red LED every 2.3
>: seconds. I've set the configuration bits accordingly and the DELAY
>: subroutine works fine and all interrupts are diabled. Just can't seem
>: to see where I'm going wrong. Any advice would be most appreciated.
>
>: Simon
>
>: list p=18f252
>: include <p18f252.inc>
>
>: ; Oscillator Source : 4 Mhz External Oscillator
>: ; Watchdog Timer: Disabled - Controlled by SWDTEN bit
>: ; Watchdog Postscaler: 1:128
>
>: ORG 0x000000 ;Reset vector
>: GOTO COLD_START
>: ORG 0x000008 ;High priority interrupt vector
>: GOTO COLD_START
>: ORG 0x000018 ;Low priority interrupt vector
>: GOTO COLD_START
>
>: ; Power-Up
>
>: COLD_START
>: BCF WDTCON,SWDTEN ;Ensure WDT is disabled.
>: CLRF PORTA ;Clear port data latches.
>: MOVLW H'07' ;Configure A/D for all
>: MOVWF ADCON1 ;port bits digital.
>: CLRF TRISA ;RA0-RA5=outputs.
>: CLRF PORTB
>: MOVLW B'00000011' ;RB0:RB1=inputs
>: MOVWF TRISB ;RB2-RB7=outputs.
>: CLRF PORTC
>: CLRF TRISC ;RC0-RC7=outputs.
>
>: ; Determine start condition
>: ;
>: ;| TO | PD |
>: BTFSC RCON,PD ;| 0 | 0 | WDT wake-up.
>: GOTO MAIN ;| 0 | 1 | WDT Reset.
>: BTFSC RCON,TO ;| 1 | 0 | MCLR wakeup.
>: GOTO MAIN ;| 1 | 1 | Power-on Reset.
>: ;
>: ; Service WDT wake-up
>: ;
>: BCF WDTCON,SWDTEN ;Ensure Watchdog=OFF.
>: BSF RED
>: MOVLW HALF_SEC
>: CALL DELAY
>: BCF RED
>: SNOOZE BSF WDTCON,SWDTEN
>: SLEEP
>: ;
>: ; Start-up
>: ;
>: MAIN BSF GREEN
>: MOVLW HALF_SEC
>: CALL DELAY
>: BCF GREEN
>: GOTO SNOOZE
>: ;
>: END
Reply by Dennis Clark●May 4, 20052005-05-04
PigPOg <simon@capella.co.uk> wrote:
I don't see where you've configured the fuses to enable the watchdog.
Did you just not post that part?
DLC
: Hi, can anyone help please? I've started to use the high-end family of
: 18f PICs and I just can't seem to get the WDT wake-up working. All I
: want to do is pulse a Green LED once for 1/2 second on applying power
: and then enter SLEEP for 2.3 seconds, wake-up, pulse a Red LED for 1/2
: second then repeat the SLEEP, waking to flash the Red LED every 2.3
: seconds. I've set the configuration bits accordingly and the DELAY
: subroutine works fine and all interrupts are diabled. Just can't seem
: to see where I'm going wrong. Any advice would be most appreciated.
: Simon
: list p=18f252
: include <p18f252.inc>
: ; Oscillator Source : 4 Mhz External Oscillator
: ; Watchdog Timer: Disabled - Controlled by SWDTEN bit
: ; Watchdog Postscaler: 1:128
: ORG 0x000000 ;Reset vector
: GOTO COLD_START
: ORG 0x000008 ;High priority interrupt vector
: GOTO COLD_START
: ORG 0x000018 ;Low priority interrupt vector
: GOTO COLD_START
: ; Power-Up
: COLD_START
: BCF WDTCON,SWDTEN ;Ensure WDT is disabled.
: CLRF PORTA ;Clear port data latches.
: MOVLW H'07' ;Configure A/D for all
: MOVWF ADCON1 ;port bits digital.
: CLRF TRISA ;RA0-RA5=outputs.
: CLRF PORTB
: MOVLW B'00000011' ;RB0:RB1=inputs
: MOVWF TRISB ;RB2-RB7=outputs.
: CLRF PORTC
: CLRF TRISC ;RC0-RC7=outputs.
: ; Determine start condition
: ;
: ;| TO | PD |
: BTFSC RCON,PD ;| 0 | 0 | WDT wake-up.
: GOTO MAIN ;| 0 | 1 | WDT Reset.
: BTFSC RCON,TO ;| 1 | 0 | MCLR wakeup.
: GOTO MAIN ;| 1 | 1 | Power-on Reset.
: ;
: ; Service WDT wake-up
: ;
: BCF WDTCON,SWDTEN ;Ensure Watchdog=OFF.
: BSF RED
: MOVLW HALF_SEC
: CALL DELAY
: BCF RED
: SNOOZE BSF WDTCON,SWDTEN
: SLEEP
: ;
: ; Start-up
: ;
: MAIN BSF GREEN
: MOVLW HALF_SEC
: CALL DELAY
: BCF GREEN
: GOTO SNOOZE
: ;
: END
--
============================================================================
* Dennis Clark dlc@frii.com www.techtoystoday.com *
* "Programming and Customizing the OOPic Microcontroller" Mcgraw-Hill 2003 *
============================================================================
Reply by PigPOg●May 4, 20052005-05-04
Hi, can anyone help please? I've started to use the high-end family of
18f PICs and I just can't seem to get the WDT wake-up working. All I
want to do is pulse a Green LED once for 1/2 second on applying power
and then enter SLEEP for 2.3 seconds, wake-up, pulse a Red LED for 1/2
second then repeat the SLEEP, waking to flash the Red LED every 2.3
seconds. I've set the configuration bits accordingly and the DELAY
subroutine works fine and all interrupts are diabled. Just can't seem
to see where I'm going wrong. Any advice would be most appreciated.
Simon
list p=18f252
include <p18f252.inc>
; Oscillator Source : 4 Mhz External Oscillator
; Watchdog Timer: Disabled - Controlled by SWDTEN bit
; Watchdog Postscaler: 1:128
ORG 0x000000 ;Reset vector
GOTO COLD_START
ORG 0x000008 ;High priority interrupt vector
GOTO COLD_START
ORG 0x000018 ;Low priority interrupt vector
GOTO COLD_START
; Power-Up
COLD_START
BCF WDTCON,SWDTEN ;Ensure WDT is disabled.
CLRF PORTA ;Clear port data latches.
MOVLW H'07' ;Configure A/D for all
MOVWF ADCON1 ;port bits digital.
CLRF TRISA ;RA0-RA5=outputs.
CLRF PORTB
MOVLW B'00000011' ;RB0:RB1=inputs
MOVWF TRISB ;RB2-RB7=outputs.
CLRF PORTC
CLRF TRISC ;RC0-RC7=outputs.
; Determine start condition
;
;| TO | PD |
BTFSC RCON,PD ;| 0 | 0 | WDT wake-up.
GOTO MAIN ;| 0 | 1 | WDT Reset.
BTFSC RCON,TO ;| 1 | 0 | MCLR wakeup.
GOTO MAIN ;| 1 | 1 | Power-on Reset.
;
; Service WDT wake-up
;
BCF WDTCON,SWDTEN ;Ensure Watchdog=OFF.
BSF RED
MOVLW HALF_SEC
CALL DELAY
BCF RED
SNOOZE BSF WDTCON,SWDTEN
SLEEP
;
; Start-up
;
MAIN BSF GREEN
MOVLW HALF_SEC
CALL DELAY
BCF GREEN
GOTO SNOOZE
;
END