Asm sleep - pbp sleep

[sayzer]

Yes, I checked it again. For some reason I remember to have two NOPs. Sorry for that. Have one or three. It is up to you.

[Ioannis]

I rephrase: at least one NOP.

You may have as many as you want of course. Will not argue that. Still, I do not know which case(s) will not need the NOP, so put it there in any case!

Ioannis

[MOUNTAIN747]

Yes, I checked it again. For some reason I remember to have two NOPs. Sorry for that. Have one or three. It is up to you.

So I've run all the test Sayzer has suggested. No changes. I then strip code to a couple of lines. I have done this on multipal 1936 and different boards.

Asm
 __config _CONFIG1,_FOSC_INTOSC & _CLKOUTEN_OFF & _MCLRE_ON & _BOREN_OFF & _WDTE_OFF & _FCMEN_OFF & _CP_OFF & _CPD_OFF & _IESO_OFF
 __config _CONFIG2, _WRT_OFF & _PLLEN_OFF & _STVREN_ON & _BORV_LO & _LVP_OFF
endasm  
define OSC 8
    OSCCON=%01110000   ;1110=8Mhz                                                 
    ANSELA=$0   
    ANSELB=$0    
    ADCON0=$0
    PortA=0
    PortB=0                                      
    PortC=0 
    TrisA=%00000001                                                                                
    TrisB=%00001001        
    TrisC=%00000000   
    Avar    var byte
    Bvar    var byte
    Cvar    var byte 
    
SleepMode:
ASM
;    BTFSS   BAUDCON,RCIDL  ;Check for High, no receive in progress 
;    GOTO $-1                     ;return to previous line
;    BSF BAUDCON,WUE        ;Wake on Rx from Master
;    BSF PORTA,1            ;LED
   
    SLEEP
    BSF  PORTC,1   ;LED 
    nop
    nop
    nop                   .
ENDASM

SLEEP is the first command after which my LED flashes apx. every 2.14seconds.
I then expand the code.

SleepMode:
ASM
;    BTFSS   BAUDCON,RCIDL  ;Check for High, no receive in progress 
;    GOTO $-1                     ;return to previous line
               
    BSF BAUDCON,WUE        ;Wake on Rx from Master
    BSF PORTA,1    ;LED 
    SLEEP
    BSF  PORTC,1   ;LED 
    nop
    nop
    nop                   .
ENDASM
       END

I run the code and LED A.1 is on and LED C.1 is blinding every 2.14sec.
I then expand the code.

SleepMode:
ASM
    BTFSS   BAUDCON,RCIDL  ;Check for High, no receive in progress 
    GOTO $-1                     ;return to previous line
    BSF BAUDCON,WUE        ;Wake on Rx from Master
    BSF PORTA,1            ;LED  
    SLEEP
    BSF  PORTC,1   ;LED 
    nop
    nop
    nop                    ; Should be in sleep for 10sec.
ENDASM

I run the code and No LED comes on. The program is stuck in the loop BTFSS BAUDCON, RCIDL & GOTO $-1. This is a HARDWARE RESET not caused by any of my code unless something in the configs are at falt. Threre are no interrupts as I have tested all flag bits i can think of. Rx stays LOW. No com is connected to the board. RCIDL should be HIGH but it is not.
CONFIGS !!! Next round of testing.

[richard]

its all the same problem
what bank is baudcon in?
what bank is porta or portc in ?

ASM
BTFSS BAUDCON,RCIDL ;Check for High, no receive in progress
GOTO $-1 ;return to previous line
BSF BAUDCON,WUE ;Wake on Rx from Master
BSF PORTA,1 ;LED
SLEEP
BSF PORTC,1 ;LED
nop
nop
nop ; Should be in sleep for 10sec.
ENDASM

[sayzer]

Your MCLRE is ON.
If you are using power adapter (not battery), make sure you have 100nf cap from MCLRE pin to GND. And I am not even asking about 4K7 - 10K res to vdd; Assuming it is already there.

And, if the osc is giving you issues somehow, then try OSCCON=%01110010.
And check OSC stable bits in OSCSTAT.

[richard]

if you are going to do this sort of thing in asm then you need to understand how banked memory access is
used for this chip. hint [ baudcon is not in access bank ]

[MOUNTAIN747]

if you are going to do this sort of thing in asm then you need to understand how banked memory access is
used for this chip. hint [ baudcon is not in access bank ]

Thanks guys for all your replies. I really do appreciate the time you've
taken.
So Richard, I should have understood what you were saying the first time. I converted all code to PBP and it looks like RCIDL is set after all. However it didn't change the results.
I then went to battery power, no change. Still a reset every 2.14sec. I also changed several of the configs with no change in results. I may mark this one up as part of the magical mystery tour as I have a work around for the problem. This is one of a couple problems that I could never solve. The other was the inability to make RA.7 a digital I/O. I wonder if my software has some corruption. Yea, when all else fails blame it on the software. Wayne

[Ioannis]

Did you set WDT to OFF?

Ioannis