Low power aplication on 12F629

[ofuzzy1]

Try the 12f635 or the 12f683.

The 12F629 does not have the OSCCON @ [8F - hex] , register so you can't set the speed it is stuck at 4MHz.
You will need to read the DATA SHEET a bit more closely -- as always it is buried in the fineprint

some hints: * learned from observation, please let me know if I'm wrong : )

0. Set the 2007 Register BIT FIVE [5] to ZERO [0] *****************
----> I currently do this just before programming in the programmer configuration menu.
***** This disables the master reset and allows you a. to ignore it, b. use GPIO.3 as an input. ---> for the pros I have not figured out how to set this in PBasic. more rtf is in order.

1. SLEEP and NAP are not affected by the cpu speed [really helpful]
2. PAUSE will be affected by the timer speed, >> will shift the number
3. To save power turn off the outputs when you are not using them ie. TRISIO = $FF
--- You can use this instead of GPIO = XX to turn off your lamps

I also had trouble with setting PBasic to work on slow CPU

Here's my kludge on the 12f683 : )

This is blinking some lights in a special pattern [code not shown] when off the cpu uses between 40-60 nano Amp!! Yes, NANO amps!
on a cr2016

-----------------------------------------------
The circuit is:
pin
1 - BATT+  not even a cap to pin.8 [ground] :)
2 - LED1 +
3 - LED2 +
4 - NC
5 - LED3 +
6 - LED4 +
7 - BUZZER.minus ---> *** this PIN is a SINK, shorts to ground so turn it to ZERO in GPIO.0 when you want it to work -- other end of the BUZZER TO to batt+, use GPIO.0
8- BATT -

LED1-4 - combined together then 100ohm to pin.8 [ground]

My typical header -- all commented on 12f683 for this program

'
' FOR LOW POWER DISABLE AS MANY FEATURES AS POSSIBLE.
' ** FOR 12F675 un-COMMENT CMCON=7, ANSEL=0, ADCON0=0
' ** FOR 12F629 COMMENT ALL
 '   CMCON = $07  'CMCON — COMPARATOR CONTROL REGISTER  ALL DIGITAL
'    TRISIO = %11111011   '  tristate mode  1=INPUT
' 	TRISA  = %00001000	' Set PORTA.0 to input   A.3 input ONLY  1=in
' 	TRISA  = %00001000	' Set PORTA.3 input
'	ADCON1 = %01100000	' Set a2d convert at clk/6 [slowest]
'	ADCON1 = %00000000	' Set a2d convert at clk/2 [fastest]
'	ANSEL  = %00000000  ' AN0/RA0 as analog input     1=ANALOG
'	ADCON0 = %00000001	' .7=10bits left justify result!! / .0 1=a2d ON
'	ADCON0 = %00000000	' .7=10bits left justify result!! / .0 1=a2d ON
'   WPUA =   %00000000  ' TURN ON WEAK PULLUP 1=ON VALID=.5.4.2.1.0

' lifted right from the data sheet     : )
'
'low speed osccon 31khz 
''bit 6-4 IRCF<2:0>: Internal Oscillator Frequency Select bits
'                               correction 
'                               by shifting
'                                   |
'                                   v
'       111 =8MHz
'       110 =4MHz (default)         0
'       101 =2MHz                   1   2
'       100 =1MHz                   2   4
'       011 =500kHz                 3   8
'       010 =250kHz                 4   16
'       001 =125kHz                 5   32
'       000 =31kHz (LFINTOSC)       7   128

        OSCCON.6 = 0
        OSCCON.5 = 0
        OSCCON.4 = 0
speed_shift  CON   7   '  use 0-7 : oscillator / delay correction by shifting


' BYTES
led           VAR byte   '  lower 6 bits only  for GPIO

' WORDS
X       var	word


' TEST ALL LAMPS GPIO.1.2.4  3=INPUT ONLY

' Delay for ~3 seconds
X= 3000     ' START UP DELAY TIME
'
' could of done this as a short gosub 
'
led =    $02 
TRISIO = $FE - led
GPIO =   led
Pause X >> speed_shift       ' Delay for on time in milliseconds
led =    $04 
TRISIO = $FF - led
GPIO =   led
Pause X >> speed_shift       ' Delay for on time in milliseconds
led =    $10 
TRISIO = $FE - led
GPIO =   led
Pause X >> speed_shift       ' Delay for on time in milliseconds
led =    $20 
TRISIO = $FF - led
GPIO =   led
Pause X >> speed_shift       ' Delay for on time in milliseconds


....


 LED = %00110110                    ' GPIO.1.2.4.5
  
     TRISIO = $FF    ' TURN OFF OUTPUTS TO SAVE POWER
     GPIO= led       ' Chose which LED to Turn ON


' LED ON fast blink # led 
     TRISIO = $FF - led  ' Enable output - fast blink # led
    Pause  128  >> speed_shift 

' LED OFF
    TRISIO = $FF    ' TURN OFF OUTPUTS TO SAVE POWER
    Pause  256  >> speed_shift      'time in mS

end

[ofuzzy1]

Want to use pin4?
It will only be an INPUT.

' WHEN PROGRAMMING PROGRAM $2007.5 TO LOW THIS WILL ENABLE GPIO.3 / RA3 AS AN INPUT
'
' Set the 2007 Register BIT FIVE [5] to ZERO [0] *****************
----> I currently do this just before programming in the programmer configuration menu.
'
'OR
see: http://www.picbasic.co.uk/forum/showthread.php?t=14421

' change the config file
' OR IN THE C:\PBP\chip.INC
' i.e. C:\PBP\12F683.INC


change this line to:
device pic12F683, intrc_osc_noclkout, wdt_on, mclr_off, protect_off

and this line to:
__config _INTRC_OSC_NOCLKOUT & _WDT_ON & _MCLRE_OFF & _CP_OFF

;****************************************************************
;*  12F683.INC                                                  *
;*                                                              *
;*  By        : Leonard Zerman, Jeff Schmoyer                   *
;*  Notice    : Copyright (c) 2005 microEngineering Labs, Inc.  *
;*              All Rights Reserved                             *
;*  Date      : 08/31/05                                        *
;*  Version   : 2.46a                                           *
;*  Notes     :                                                 *
;****************************************************************
        NOLIST
    ifdef PM_USED
        LIST
        include 'M12F683.INC'	; PM header
        device  pic12F683, intrc_osc_noclkout, wdt_on, mclr_off, protect_off
;        device  pic12F683, intrc_osc_noclkout, wdt_on, mclr_on, protect_off

        XALL
        NOLIST
    else
        LIST
        LIST p = 12F683, r = dec, w = -302
        INCLUDE "P12F683.INC"	; MPASM  Header
        __config _INTRC_OSC_NOCLKOUT & _WDT_ON & _MCLRE_OFF & _CP_OFF
;        __config _INTRC_OSC_NOCLKOUT & _WDT_ON & _MCLRE_ON & _CP_OFF

        NOLIST
    endif
        LIST

[El_AMPo]

Try the 12f635 or the 12f683.

The 12F629 does not have the OSCCON @ [8F - hex] , register so you can't set the speed it is stuck at 4MHz.
You will need to read the DATA SHEET a bit more closely -- as always it is buried in the fineprint

It's quite similar your chip configs to what i'm using. 12F683 seems like a nice little chip, but still for timing applications you need an external Xtal, INTRC its not enough after some days running.

What would be handy is how to configure the 12f629 to run in LP xtal mode AND make it work in picbasic. No problem if the pause periods run slower you can always compensate for that, but the chip refuses to work in LP

[cncmachineguy]

but still for timing applications you need an external Xtal, INTRC its not enough after some days running

Sounds like a test is in order. Are you saying that after a few days the clock is no longer at said speed? by how much? I can see a test such as this:

main:
 toggle port pin
 goto main

this will give some freq out. so if we let it run a few days, we can see the new freq out.

[El_AMPo]

Sounds like a test is in order. Are you saying that after a few days the clock is no longer at said speed? by how much? I can see a test such as this:

main:
 toggle port pin
 goto main

this will give some freq out. so if we let it run a few days, we can see the new freq out.

It's a clock keeping code so you work "accumulating cycles", if you use an RC source, even if you calibrate it to a perfect frequency within a few days you will have noticeable drift because of temperature changes during the day and voltage drop from the battery. Crystals also suffer from drift but much less noticeable, and if you want better than that you will need temperature compensated RTCs or OCXO (oven controled crystal oscillators) both an overkill for my clock.

Talking about INTRC 4mhz clock... anyone was able to calibrate the value at 5 volts via oscal value?.
The factory default is calibrated at 4mhz 1% BUT at 3.5V 20ºC if I remember well. So at 5V it's like 1.1Mhz per instruction actually (measured), that means goodbye serial comms and reasonable good timing.

[cncmachineguy]

1.1Mhz per instruction actually (measured)

WOW, thats 10%!!!!