The little window says if GIE is 0 and both the flag bit and enable bit are set, it will treat the sleep command as a nop. If the flag bit is cleared, it will sleep. It IS confusingly written!
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The little window says if GIE is 0 and both the flag bit and enable bit are set, it will treat the sleep command as a nop. If the flag bit is cleared, it will sleep. It IS confusingly written!
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It does not work
ALAIN,
It still does not work,
"DEFINE INTHAND INIT" , maybe puts it to sleep and never comes out.
and "DEFINE INTHAND _BLINK" keeps the led blinking.
regards
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The last ?
Hi, RON
Ok, Thanks for the explanation ...
It really might be written instead of BUT ... : AND any interrupt ... !!!
So, appears no real need to set the GIE bit here ...
Back to Charudatt's program ...
mighn't there be a PORTB reading ... ( to end the "mismatch condition" ) ???.
Alain
Charudatt :
1) DEFINE ...INIT ... the result is quite normal !!! Pic wakes up to fall asleep ...
2) if the led keeps blinking means ... the program always stay in the interrupt stubb !!! We've traced it now.
in this case ... interrupt flags are not cleared ... : good reason, no ?
Last edited by Acetronics2; - 13th May 2007 at 10:54.
************************************************** ***********************
Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
************************************************** ***********************
IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
*****************************************
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Finally GOT it !!!
Hi, Charudatt
Straight from my test bench :
@ __CONFIG _INTOSC_OSC_NOCLKOUT & _WDT_OFF & _LVP_OFF & _PWRTE_OFF & _CP_OFF & _BODEN_OFF
DEFINE NO_CLRWDT 1
DEFINE LCD_EBIT 1
CMCON=7
VRCON=%01101100 'VRCON bit7 is OFF for no current drain
OPTION_REG.7 = 1 ' DISABLE INTERNAL PULLUPS
Porta = 0
PORTB = 0
Trisa = %11111111
Trisb = %01111111
LED VAR PORTB.5
SleepLed var PORTB.7
Dummy var byte
'
' PIC Low-Power Sleep Routine
' ---------------------------
'
' Set Sleep Interrupts
' --------------------
INTCON=%00010000 ' Interrupt Control Register
' 7=0 - GIE - Global Interrupt Enable
' 6=0 - PEIE - Peripheral Interrupt Enable
' 5=0 - TOIE - TMR0 Overflow Interrupt Enable
' 4=1 - INTE - RB0/INT Enable
' 3=0 - RBIE - PORTB change interrupt Enable
' 2=0 - TOIF - TMR0 Overflow Flag
' 1-0 - INTF - RB0/Ext Interrupt Flag
' 0=0 - RBIF - PORTB Interrupt Flag
OPTION_REG.6=1 ' 1=RB0 Rising-Edge Trigger, 0=Falling-Edge Trigger
PAUSE 500
LCDOUT $FE,1
CYCLE:
'
' Reset Interrupt Flags
' ---------------------
INTCON.1=0 ' Reset RB0 Flag
INTCON.0=0 ' Reset PORTB change Flag
'
' Sleep
' -----
LOW LED
LCDOUT $FE,2 , "*** SLEEPING ***"
High Sleepled
@ SLEEP
Dummy = PORTB
LOW SleepLed
@ nop
@ nop
@ nop
Pause 100 ' Needed for system Wake-Up
HIGH LED : PAUSE 200
LCDOUT $FE,1, " HURRY UP "
PAUSE 5000
LOW LED
GOTO CYCLE
END
CONFIG Modified to suit MPLAB Requirements ...
I used a LCD to show what happening and fixed LEDs for Wake (green) /Sleep ( Red ) states ...
disabled CLRWDT PbP insertions ... ( a passing idea ??? )
also disabled the WPU ... but that is not problematic.
also changed LEDs PORTs ...
As PORTB was used ... I did not try "Interrupt change on PortB" ... but works great with B.0 interrupt.
Works fine ... as you intended to program it !!!
Regards
Alain
Last edited by Acetronics2; - 13th May 2007 at 14:11.
************************************************** ***********************
Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
************************************************** ***********************
IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
*****************************************
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Thanks
I'll give it a shot tomorrow and post my feedback.
regards
p.s. Today after the failed experiments, i am planning the same thing on 16F73. Lets hope it works. I shall post my feedback on both tomorrow.
Last edited by charudatt; - 13th May 2007 at 17:16.
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A Beer aside for me ...
Hi, Charudatt
@ __CONFIG _INTOSC_OSC_NOCLKOUT & _WDT_OFF & _LVP_OFF & _PWRTE_OFF & _CP_OFF & _BODEN_OFF
DEFINE NO_CLRWDT 1
CMCON=7
VRCON=%01101100 'VRCON bit7 is OFF for no current drain
OPTION_REG.7 = 0 ' ENABLE INTERNAL PULLUPS
Porta = 0
PORTB = %11110001
Trisa = %11110011
Trisb = %01111111
LED VAR PORTA.2
SleepLed var PORTA.3
Dummy var byte
'
' PIC Low-Power Sleep Routine
' ---------------------------
'
' Set Sleep Interrupts
' --------------------
INTCON=%00011000 ' Interrupt Control Register
' 7=0 - GIE - Global Interrupt Enable
' 6=0 - PEIE - Peripheral Interrupt Enable
' 5=0 - TOIE - TMR0 Overflow Interrupt Enable
' 4=1 - INTE - RB0/INT Enable
' 3=1 - RBIE - PORTB change interrupt Enable
' 2=0 - TOIF - TMR0 Overflow Flag
' 1-0 - INTF - RB0/Ext Interrupt Flag
' 0=0 - RBIF - PORTB Interrupt Flag
OPTION_REG.6=0 ' 1=RB0 Rising-Edge Trigger, 0=Falling-Edge Trigger
CYCLE:
'
' Reset Interrupt Flags
' ---------------------
INTCON.1=0 ' Reset RB0 Flag
INTCON.0=0 ' Reset PORTB change Flag
'
' Sleep
' -----
LOW LED
High Sleepled
@ SLEEP
@ nop
Dummy = PORTB
LOW SleepLed
@ nop
@ nop
@ nop
Pause 100 ' Needed for system Wake-Up
HIGH LED
While ( PORTB >> 4 ) <> %00001111 ' Wait Key release
Wend ' AND a PORTB Reading ...!!!
PAUSE 200
PAUSE 5000
LOW LED
GOTO CYCLE
END
Here it is with PORTB interrupts ... ( Note I modified all inputs to be active LOW ...)
I think the origin of the problem is you forgot to read PORTB for the end of the mismatch condition ... wich Also locks the flag cancelling ( a RTFDatasheet for me ... )
Heuuuuu, CHILLED, the beer, please !!!
Alain
PS : The interrupt way also works well ... if you're intersted in, I'll post it.
Last edited by Acetronics2; - 13th May 2007 at 18:14.
************************************************** ***********************
Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
************************************************** ***********************
IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
*****************************************
|
The original program example I posted way back during another life is valid for the non-A version of the 16F62X. In the non-A version you get a wake from sleep regardless of the state of the GIE bit. However, the operation of the GIE bit differs in the A version in that respect and Alain is correct. It teaches us all a lesson here that some of the changes between PIC versions are seriously subtle! So it's read the Datasheet - thoroughly!
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Not another RTFD?!?!So it's read the Datasheet - thoroughly!
Dave
Always wear safety glasses while programming.
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Cheers for Beer.
Alain
PS : The interrupt way also works well ... if you're intersted in, I'll post it.[/QUOTE]
Thank you very much, I am just dying to test it out.
Yes Chilled beer for sure.
Post the Interrupt way code, if you can, Thank you once again.
regards
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Hey Mel,
I read the data sheet on the A version. It says on page 111 that the PIC will wake from sleep if both the flag and interrupt bits are set. Will it not wake from sleep if the flag bit is set after initiating sleep? I don't see where it discusses this.
Ron
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I'm talking about the GIE bit here. In the A version, if GIE is not set, the SLEEP (the Assembler instruction) is treated as a NOP and the PIC never enters SLEEP. This didn't work that way in the non-A version. I've a (fortunately) obsolete product that used that feature... otherwise I'd be scratching my head trying to figure why the product didn't work as expected!
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