Sleep & nap

[keymuu]

Hi!

Using picbasicpro 2,50b and having
DEFINE WDT_OFF ; one of the first statements
and then later

Both SLEEP 1
and
NAP 1
hangs, get stucked, bog down

Is the define wrong somehow or what do I miss here?
Never used these commands before. Tried also
@ DEVICE pic18F4550 WDT_OFF
but that produced error 122.
Tried some other things also but DEFINE WDT_OFF was the only one (I found) that compiled without errors.

I'm missing something, but what?

Thank's for all hints

[Jerson]

From the manual

The Watchdog Timer is used in conjunction with the SLEEP and NAP
instructions to wake the PICmicro MCU after a certain period of time.

You need to enable the WDT. How about trying this
@device 18F4550, WDT_ON

I do not know if this will work as I've not checked

[mackrackit]

Also

@device 18F4550, WDT_ON

is PM syntax.

Must use MPASM for 18Fs

@ __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H

A good late night read.
http://www.picbasic.co.uk/forum/showthread.php?t=543

[keymuu]

Also

@device 18F4550, WDT_ON

is PM syntax.

Must use MPASM for 18Fs

@ __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H

A good late night read.
http://www.picbasic.co.uk/forum/showthread.php?t=543

Thank you Dave and Jerson!

Of course, it seems to me that I can't read
That is also clearly written in the manual "...If the Watchdog Timer is not enabled, ther processor will sleep forever..., page 105", so I did not see the small word "not"...

However, changing that to WDT_ON does not produce the wanted result.
Added also WDTPS 128 but again without success.

Is there something else involved here?

That "543" is not solving this issue? It is showing that there can be many things that can go wrong... when you are not extremely familiar with this all...

[mackrackit]

there can be many things that can go wrong

That is when the fun starts

Can you post your whole code?
The actual problem might be someplace else.

[keymuu]

That is when the fun starts

Can you post your whole code?
The actual problem might be someplace else.

Here, the fun has alredy started

DEFINE LOADER_USED 1
DEFINE RESET_ORG 1000h      ' For Microchip USB Bootloader
DEFINE INTERRUPT_ORG 1008h  ' For Microchip USB Bootloader
define WDT_ON
define WDTPS 128 

DEFINE LCD_DREG       PORTD	' Set LCD Data port
DEFINE LCD_DBIT       4		' Set starting Data bit (0 or 4 if 4-bit bus)
DEFINE LCD_RSREG      PORTC	' Set LCD Register Select port
DEFINE LCD_RSBIT      2		' Set LCD Register Select bit
DEFINE LCD_EREG       PORTC	' Set LCD Enable port
DEFINE LCD_EBIT       1		' Set LCD Enable bit
DEFINE LCD_BITS       4		' Set LCD bus size (4 or 8 bits)
DEFINE LCD_LINES      4		' Set number of lines on LCD
DEFINE LCD_COMMANDUS  2000	' Set command delay time in us, 2000 us = 2ms
DEFINE LCD_DATAUS     50	' Set data delay time in us, 50 us = 0,05ms

powerOut     var PORTE.0
onOffPressed var PORTD.2
b var byte
clear

TRISE = %00001000   
TRISC = %10110000   
TRISD = %00001100
powerOut = 1
   
pause 1
lcdout $FE, 1
pause 1

pstart:
  powerout = not onoffpressed
  lcdout $FE,2, "b=", dec b
  pause 100
  b = b + 1
  'nap 5
goto pstart

So, I can see b living with nap or sleep commented, but it hangs when not commented.