sleep problem help plz >>>.

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- 14th November 2009, 06:45
Mus.me

sleep problem help plz >>>.

hello . im runing this coge example in pic 16f913, and when it goes to sleep it still runing on 3mA i need help bcz the datasheet says it sleep mode must be 3 uA . im sure there things wrong i didnt set and i want it not to reset the program when wakeup or durinf sleep.thank you

Code:

Include "modedefs.bas" DEFINE CONFIG_WORD_$3F31 DEFINE INT_OSC 8 WDTCON.0 = 0 OPTION_REG = %00000001 ADCON0 = 0 OSCCON.6 = 7 intcon = 0 vrcon = 0 PORTB =%00000001 PORTA = 0 PORTC = 0 TRISB = %00000001 G VAR BYTE H VAR BYTE L VAR BYTE K VAR BYTE NOTE VAR BYTE BUZ VAR PORTB.3 MAIN: G = G + 1 IF G => 30 THEN slp HIGH PORTB.1 PAUSE 100 IF PORTB.0 = 0 THEN SLP LOW PORTB.1 PAUSE 1000 IF PORTB.0 = 0 THEN SLP GOTO MAIN SLP: SOUND BUZ,[126,3,00,4,126,3,00,4,126,3,00,4,126,3,00,40,120,6,00,8,124,6,00,10,120,6,00,8,124,6] OPTION_REG =%00000001 PAUSE 100 for NOTE = 115 TO 127 SOUND BUZ,[NOTE,3] NEXT NOTE HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 INTCON.0 = 0 'RBIF INTCON.3 = 1 'RBIE INTCON.1 = 0 INTCON.4 = 1 sleep 1800 @ SLEEP @ NOP HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 GOTO MAIN END
- 14th November 2009, 10:10
Mus.me

sorry i did mistikes , all wat i need is to put pic in sleep mode but very low current like datasheet says 2 uA im gettin 3 mA when it sleeps . plz help
- 14th November 2009, 13:46
mehmetOzdemir

Quote:

Originally Posted by Mus.me

sorry i did mistikes , all wat i need is to put pic in sleep mode but very low current like datasheet says 2 uA im gettin 3 mA when it sleeps . plz help

is there any voltage regulator on your board.(7805 - 78l05)

measure only the current off pic.
- 14th November 2009, 21:17
Mus.me

Quote:

Originally Posted by mehmetOzdemir

is there any voltage regulator on your board.(7805 - 78l05)

measure only the current off pic.

hi mehmetOzdemir , no im useing 3.7 battery i just think the problem in the code i dont know how to desables everythings during sleep mode. help plz
- 14th November 2009, 21:24
Darrel Taylor

Code:

DEFINE CONFIG_WORD_$3F31 DEFINE INT_OSC 8

Are you putting those in there for some other purpose?

They have no effect on your PIC.
Including setting the proper configs and OSC.
- 14th November 2009, 22:59
Mus.me

Quote:

Originally Posted by Darrel Taylor

Code:

DEFINE CONFIG_WORD_$3F31 DEFINE INT_OSC 8

Are you putting those in there for some other purpose?

They have no effect on your PIC.
Including setting the proper configs and OSC.
 

thanks DT ive took them off but still the same problem
- 14th November 2009, 23:14
Darrel Taylor

Quote:

Originally Posted by Mus.me

thanks DT ive took them off but still the same problem

And what did you replace them with?
- 14th November 2009, 23:26
Mus.me

Quote:

Originally Posted by Darrel Taylor

And what did you replace them with?
 

well config words is $3F31 wdte off i did sett them in the programmer loader
im sure i didnt disable somethings like comparators or registers or acd im new in pbp ,i dont understand to much the datasheet . and using internal osc .tank DT for reply ..
- 15th November 2009, 00:08
BrianT

Hardware issues

You don't tell us what your hardware configuration is. You do not appear to be setting TRIS for ports A, C and E. They will probably have defaulted to inputs and if any are floating they can be in an undefined state and drawing high current. Make sure all unused inputs are tied high or low and are not allowed to float some mid voltage where the CMOS inputs draw high current.

Better to make all unused pins outputs and force them high or low as appropriate for your hardware.

Also, when the system goes to sleep, the high/low status of any outputs are preserved. You might find the processor is asleep but a pin is high and sourcing current to a load like your buzzer. Piezo buzzers can have high leakage. Equally the pin might be low and sinking current from the supply. Use a voltmeter and check that all i/o pins are doing exactly what you want. The WatchDog, brownout and other timers and peripherals all draw additional current and the datasheet gives the most favourable sleep current with all these devices turned off.

I find it helpful to explicitly define every hardware pin on all ports, whether used or not, with something like

Code:

'PortA AccelY var porta.0 ' accelerometer Y axis AccelX var porta.1 ' accelerometer X axis ECG var porta.2 ' analog heart input MemD var porta.3 ' M25Pxx Data TO memchip MemClk var porta.4 ' M25Pxx clock LED var porta.5 ' Active HIGH SpareA6 var porta.6 ' SpareA7 var porta.7 ' TRISA = %00001111 ' lowest power PORTA = %00000000 ' lowest power

PBP assumes the WatchDog prescaler is set to 512. SLEEP xx is only accurate if the WDTPS is 512. SLEEP causes a fairly high current spike each time the chip wakes up, approximately once per second. If you set the WDTPS to something like 2048 the sleep times are off by a factor of 4 but the wakeup current spike is reduced in frequency by a factor of 4 as well.

Getting down to lowest power is hard and needs a sensitive microammeter in my experience. I have spent months getting to minimum current on a data logger and have now got a system down below 500 nA with a PIC18F4620 at 3.7 volts. That includes 256 Mbits of memory and all peripherals.

HTH
BrianT
- 15th November 2009, 00:20
Mus.me

Quote:

Originally Posted by BrianT

You don't tell us what your hardware configuration is. You do not appear to be setting TRIS for ports A, C and E. They will probably have defaulted to inputs and if any are floating they can be in an undefined state and drawing high current. Make sure all unused inputs are tied high or low and are not allowed to float some mid voltage where the CMOS inputs draw high current.

Better to make all unused pins outputs and force them high or low as appropriate for your hardware.

Also, when the system goes to sleep, the high/low status of any outputs are preserved. You might find the processor is asleep but a pin is high and sourcing current to a load like your buzzer. Piezo buzzers can have high leakage. Equally the pin might be low and sinking current from the supply. Use a voltmeter and check that all i/o pins are doing exactly what you want. The WatchDog, brownout and other timers and peripherals all draw additional current and the datasheet gives the most favourable sleep current with all these devices turned off.

I find it helpful to explicitly define every hardware pin on all ports, whether used or not, with something like

<code>
'PortA
AccelY var porta.0 ' accelerometer Y axis
AccelX var porta.1 ' accelerometer X axis
ECG var porta.2 ' analog heart input
MemD var porta.3 ' M25Pxx Data TO memchip
MemClk var porta.4 ' M25Pxx clock
LED var porta.5 ' Active HIGH
SpareA6 var porta.6 '
SpareA7 var porta.7 '
TRISA = %00001111 ' lowest power
PORTA = %00000000 ' lowest power

</code>

PBP assumes the WatchDog prescaler is set to 512. SLEEP xx is only accurate if the WDTPS is 512. SLEEP causes a fairly high current spike each time the chip wakes up, approximately once per second. If you set the WDTPS to something like 2048 the sleep times are off by a factor of 4 but the wakeup current spike is reduced in frequency by a factor of 4 as well.

Getting down to lowest power is hard and needs a sensitive microammeter in my experience. I have spent months getting to minimum current on a data logger and have now got a system down below 500 nA with a PIC18F4620 at 3.7 volts. That includes 256 Mbits of memory and all peripherals.

HTH
BrianT

THANK YOU BrianT FOR UR HELP I WILL DO THEM NOW IM ON THE DATASHEET PULLING SOME HEAR .I WILL POST RESULT NEXT TIME THANK U AGAIN ...
- 15th November 2009, 01:22
Mus.me

Code:

Include "modedefs.bas" @ DEVICE WDT_OFF, PWRT_OFF,MCLR_OFF,CPD_OFF'IESO_OFF PCON.4 = 1 WDTCON.0 = 0 WDTCON.4 = 3 OPTION_REG = %00000001 ADCON0 = 0 OSCCON.6 = 7 intcon = 0 vrcon = 0 PORTB =%00000001 PORTA = 0 PORTC = 0 TRISA = 0 TRISC = 0 TRISB = %00000001

I DID THIS SETTING BUT STILL 5mA IN SLEEP MODE [ @ SLEEP @ NOP]
- 15th November 2009, 04:17
bogdan

turn off the comparators

...try to add:

CMCON0.2 = 1 'Comparators Off for PORTA.0 to 3 (CM bits)=save power
CMCON0.1 = 1
CMCON0.0 = 1

VRCON.7 = 0 'CVref circuit powered down (VREN bit)=save power
- 15th November 2009, 05:24
Mus.me

Code:

@ DEVICE WDT_OFF, PWRT_OFF,MCLR_OFF,CPD_OFF VRCON.7 = 0 CMCON0=%00000111 WDTCON.0 = 0 WDTCON.4 = 3 OPTION_REG.7 = 0 ADCON0.0 = 0 OSCCON.6 = 7 LCDCON.4=0 LCDCON.6=1 LCDCON.7=0 'CMCON = 7 intcon = 0

I DID THIS BUT STILL 5mA IN SLEEP MODE :mad:
- 15th November 2009, 11:19
Gusse

Hi there,

Any changes that you could share applications schematics with us?
Do you have discrete pull-ups or pull-downs connected to PIC IO's?
Is PIC only active part of the system?

BR,
-Gusse-
- 15th November 2009, 13:35
Mus.me

Quote:

Originally Posted by Gusse

Hi there,

Any changes that you could share applications schematics with us?
Do you have discrete pull-ups or pull-downs connected to PIC IO's?
Is PIC only active part of the system?

BR,
-Gusse-

hello . i have pic16f913 no pull up resistance external,i have a buzzer with 2 transistor but i take them off when the pic in sleep mode i test the current still 5.9 mA in sleep mode it goes up when wake up between 32 to 65 mA, 1 bottom in portb.0 for interrupt wakeup , and 2 leds i take them off but no change .here is my code example .nothings pluged in the ic external . im confused ..?im sure something in the registers or timers i donno how to set timers

Code:

Include "modedefs.bas" @ DEVICE WDT_OFF, PWRT_OFF,MCLR_OFF,CPD_OFF, BOD_OFF, PROTECT_OFF,INTRC_OSC_NOCLKOUT ANSEL = %00000000 VRCON.7 = 1 'CVref circuit powered down (VREN bit)=save power CMCON0=%00000111 'WDTCON = %00010110 WDTCON.0 = 0 WDTCON.4 = 3 OPTION_REG.7 = 1 ' i tryed this =0 but the same problm ADCON0.0 = 0 OSCCON.6 = 7 LCDCON.4=0 LCDCON.6=1 LCDCON.7=0 CMCON1 = 7 INTCON = 0 PCON.4 = 0 PORTB =%00000001 TRISB = %00000001 PORTA = 0 TRISA = 0 PORTC = 0 TRISC = 0 G VAR BYTE H VAR BYTE L VAR BYTE K VAR BYTE NOTE VAR BYTE BUZ VAR PORTB.3 MAIN: G = G + 1 IF G => 30 THEN slp HIGH PORTB.4 PAUSE 100 LOW PORTB.4 PAUSE 1000 GOTO MAIN SLP: OPTION_REG.7=0 'INTCON.0 = 0 'RBIF 'INTCON.3 = 1 'RBIE INTCON.1 = 0 INTCON.4 = 1 @ SLEEP @ NOP PAUSE 100 HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 GOTO MAIN END
- 15th November 2009, 14:37
bogdan

rising edge or falling edge (INTEDG bit) ?

How much is the consumption when you press and hold the button (portb.0) ?
- 15th November 2009, 15:20
Gusse

How about by changing all pins to inputs before sleep?

Code:

<code>SLP: OPTION_REG.7=0 'INTCON.0 = 0 'RBIF 'INTCON.3 = 1 'RBIE INTCON.1 = 0 INTCON.4 = 1 TRISA = %11111111 TRISB = %11111111 TRISC = %11111111 @ SLEEP @ NOP TRISA = %00000000 TRISB = %00000001 TRISC = %00000000 PAUSE 100 HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 GOTO MAIN</code>

Any effects?

BR,
-Gusse-
- 16th November 2009, 00:27
BrianT

Try PBP SLEEP instead of Microchip @ SLEEP

I don't use the @ SLEEP command.

I use PBP SLEEP xxx to get a delay and low power.

HTH
BrianT
- 16th November 2009, 03:03
Mus.me

Quote:

Originally Posted by Gusse

How about by changing all pins to inputs before sleep?

Code:

<code>SLP: OPTION_REG.7=0 'INTCON.0 = 0 'RBIF 'INTCON.3 = 1 'RBIE INTCON.1 = 0 INTCON.4 = 1 TRISA = %11111111 TRISB = %11111111 TRISC = %11111111 @ SLEEP @ NOP TRISA = %00000000 TRISB = %00000001 TRISC = %00000000 PAUSE 100 HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 GOTO MAIN</code>

Any effects?

BR,
-Gusse-

hello forum my wishese to everyones , Gusse i did this still nothings and got 1 volt out from each pin and more current, i will try what u BrianT says , thank you for help .
- 16th November 2009, 08:07
Gusse

Are you sure that your PIC is not damaged?
Sound strange that current consumption gets higher when IO's are changed to inputs. I have used this very successfully. During sleep mode, only current consumption that I can see, comes from low dropout 5V regulator.

I think this is only way to put PIC into sleep for undefined period.

Code:

<code>@ sleep </code>

or

Code:

<code>ASM sleep ENDASM </code>

BR,
-Gusse-
- 16th November 2009, 08:21
Mus.me

Quote:

Originally Posted by Gusse

Are you sure that your PIC is not damaged?
Sound strange that current consumption gets higher when IO's are changed to inputs. I have used this very successfully. During sleep mode, only current consumption that I can see, comes from low dropout 5V regulator.

I think this is only way to put PIC into sleep for undefined period.

Code:

<code>@ sleep </code>

or

Code:

<code>ASM sleep ENDASM </code>

BR,
-Gusse-

morning Gusse and everyones thank you for helping me .i just wake up and foundout that pic has short of 600 ohm between vcc and gnd i changed the pic the same f913 and sleep mode down to 0.063mA ,and this is my code example thank you again everyone here trying to help .

Code:

Include "modedefs.bas" @ DEVICE WDT_OFF, PWRT_OFF,MCLR_OFF,CPD_OFF, BOD_OFF, PROTECT_OFF,INTRC_OSC_NOCLKOUT ANSEL = %00000000 VRCON.7 = 1 CMCON0=%00000111 'WDTCON = %00010110 WDTCON.0 = 0 WDTCON.4 = 3 OPTION_REG.7 = 1 ADCON0.0 = 0 OSCCON.6 = 7 LCDCON.4=0 LCDCON.6=1 LCDCON.7=0 CMCON1 = 7 intcon = 0 PCON.4 = 0 PORTB =%00000001 TRISB = %00000001 PORTA = 0 TRISA = 0 PORTC = 0 TRISC = 0 G VAR BYTE H VAR BYTE L VAR BYTE K VAR BYTE NOTE VAR BYTE BUZ VAR PORTB.3 MAIN: G = G + 1 IF G => 30 THEN slp HIGH PORTB.4 PAUSE 100 IF PORTB.0 = 0 THEN SLP LOW PORTB.4 PAUSE 1000 IF PORTB.0 = 0 THEN SLP GOTO MAIN SLP: OPTION_REG.7=0 HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 INTCON.1 = 0 INTCON.4 = 1 @ SLEEP @ NOP PAUSE 100 HIGH PORTB.2 PAUSE 1000 LOW PORTB.2 g = 0 GOTO MAIN END