Won't go back to SLEEP after 1st Interrupt

[Darrel Taylor]

Two suggestions.

• Take a 100K resitor from +5V to your ammeter, and the other lead to ground.
  If your meter is working correctly, you should get a reading of 50uA.
  <br>
• Remove the inputs from any of the pins that you can.
  Compile and load this program ...
  

  ASM  ; 16F690
    ifdef PM_USED                  ; For PM assembler
      device  INTRC_OSC_NOCLKOUT   ;   Oscillator Selection
      device  FCMEN_OFF            ;   Fail-Safe Clock Monitor
      device  IESO_OFF             ;   Internal External Switchover
      device  BOD_OFF              ;   Brown-out Detect
      device  CPD_OFF              ;   Data Code Protection
      device  PROTECT_OFF          ;   Code Protection
      device  MCLR_OFF             ;   Master Clear Reset
      device  PWRT_OFF             ;   Power-up Timer
      device  WDT_OFF              ;   Watchdog Timer
  
    else                            ; For MPASM assembler
  cfg=      _INTRC_OSC_NOCLKOUT     ;   Oscillator Selection
  cfg=cfg&  _FCMEN_OFF              ;   Fail-Safe Clock Monitor
  cfg=cfg&  _IESO_OFF               ;   Internal External Switchover
  cfg=cfg&  _BOR_OFF                ;   Brown-out Reset
  cfg=cfg&  _CPD_OFF                ;   Data Code Protection
  cfg=cfg&  _CP_OFF                 ;   Code Protection
  cfg=cfg&  _MCLRE_OFF              ;   Master Clear Reset
  cfg=cfg&  _PWRTE_OFF              ;   Power-up Timer
  cfg=cfg&  _WDT_OFF                ;   Watchdog Timer
    __CONFIG  cfg
  
    endif
  ENDASM
  
  END   ; Enter Comma (sleep forever with no hope of waking)

[jellis00]

T
<br>[*]Remove the inputs from any of the pins that you can.
Compile and load this program ...

ASM  ; 16F690
  ifdef PM_USED                  ; For PM assembler
    device  INTRC_OSC_NOCLKOUT   ;   Oscillator Selection
    device  FCMEN_OFF            ;   Fail-Safe Clock Monitor
    device  IESO_OFF             ;   Internal External Switchover
    device  BOD_OFF              ;   Brown-out Detect
    device  CPD_OFF              ;   Data Code Protection
    device  PROTECT_OFF          ;   Code Protection
    device  MCLR_OFF             ;   Master Clear Reset
    device  PWRT_OFF             ;   Power-up Timer
    device  WDT_OFF              ;   Watchdog Timer

  else                            ; For MPASM assembler
cfg=      _INTRC_OSC_NOCLKOUT     ;   Oscillator Selection
cfg=cfg&  _FCMEN_OFF              ;   Fail-Safe Clock Monitor
cfg=cfg&  _IESO_OFF               ;   Internal External Switchover
cfg=cfg&  _BOR_OFF                ;   Brown-out Reset
cfg=cfg&  _CPD_OFF                ;   Data Code Protection
cfg=cfg&  _CP_OFF                 ;   Code Protection
cfg=cfg&  _MCLRE_OFF              ;   Master Clear Reset
cfg=cfg&  _PWRTE_OFF              ;   Power-up Timer
cfg=cfg&  _WDT_OFF                ;   Watchdog Timer
  __CONFIG  cfg

  endif
ENDASM

END   ; Enter Comma (sleep forever with no hope of waking)

[/list]

I copied this code into my MicroCode Studio editor, assembled it with PICBasic Pro compiler, programmed it into my 16F690 that is installed in a PICkit2 Low Pin Development Board, and then tried to run the program. I get the following Assembler errors:
"Overwriting previous address contents (2007)
Symbol not previously defined (_FCMEN_OFF)
Symbol not previously defined (_IESO_OFF)
Symbol not previously defined (_BOR_OFF)
SYmbol not previously defined (_CPD_OFF)"

I presumed this was because I had the _config file commented out in the 16F690.INC file, so decommented it and tried again. Same errors ocurred. Any suggestions.
Question: If I get this program to run, what will that tell me? Are you saying that with the 16F690 programmed this way I can then measure the power consumed when running and it will tell me the lowest possible power for the 16F690 before adding any other code??

[Darrel Taylor]

First off, do the resistor test. Make sure the meter's working.
Never assume the reading you get is what you are actually testing.

For the "Overwriting previous address contents (2007)" error, see this post ...
http://www.picbasic.co.uk/forum/show...75&postcount=5

I'm not sure what you mean by "decommented it", you should have Commented it.

The idea is to eliminate your code and config's as the problem.
If you still get high current readings with the chip locked in sleep mode, then you need to look at the hardware.
By itself, the chip disables pull-ups, puts all pins in input mode, with all analog channels enabled. Current due to noise will be minimal.
<br>

[Archangel]

John,
add this to your config: _FCMEN_OFF , this disables the fail safe clock monitor, made about 200 micro amp difference here.