oscillator problem

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  1. - 4th September 2010, 11:09 #1
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    Quote Originally Posted by Kamikaze47 View Post
    Yes there is a 0.1uF cap close to the VCC pin from there to ground. There is also a 100uF cap at the point that the supply enters the board (board is supplied by an external 5v source).

    config:
    Code:
            __CONFIG    _CONFIG1H, _HSPLL_OSC_1H
        __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
        __CONFIG    _CONFIG3H, _MCLRE_ON_3H
        __CONFIG    _CONFIG4L, _LVP_OFF_4L
    Could you try

    Code:
    @ __CONFIG _CONFIG1H, _IESO_OFF_1H & _FSCM_OFF_1H & _HSPLL_OSC_1H
@ __CONFIG _CONFIG2L, _PWRT_ON_2L & _BOR_OFF_2L & _BORV_27_2L
@ __CONFIG _CONFIG2H, _WDT_ON_2H & _WDTPS_32K_2H
@ __CONFIG _CONFIG3H, _MCLRE_ON_3H
@ __CONFIG _CONFIG4L, _DEBUG_OFF_4L & _LVP_OFF_4L & _STVR_OFF_4L
@ __CONFIG _CONFIG5L, _CP0_OFF_5L & _CP1_OFF_5L
@ __CONFIG _CONFIG5H, _CPB_OFF_5H & _CPD_OFF_5H
@ __CONFIG _CONFIG6L, _WRT0_OFF_6L & _WRT1_OFF_6L
@ __CONFIG _CONFIG6H, _WRTC_OFF_6H & _WRTB_OFF_6H & _WRTD_OFF_6H
@ __CONFIG _CONFIG7L, _EBTR0_OFF_7L & _EBTR1_OFF_7L
@ __CONFIG _CONFIG7H, _EBTRB_OFF_7H
    as a config , to be sure of.

    Alain
    ************************************************** ***********************
    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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  2. - 4th September 2010, 11:15 #2
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    Quote Originally Posted by Acetronics View Post
    Could you try
    ...
    Unfortunately, no difference.
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  3. - 4th September 2010, 12:09 #3
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    Quote Originally Posted by Kamikaze47 View Post
    Unfortunately, no difference.
    did you clean the board carefully with acetone to wipe off any solder stripper ??? especially under the caps ...

    next step will be verify your caps value ( SMD not marked ...) and Xtal data ...

    may be could we have an eye on your program ??? ...

    Alain

    BTW ... could you try to run the PIC @ 10 mhz ( HS_OSC ) ... just to see if any life aboard.
    Last edited by Acetronics2; - 4th September 2010 at 12:12.
    ************************************************** ***********************
    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 " !!!
    *****************************************
  4. - 4th September 2010, 12:27 #4
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    Quote Originally Posted by Acetronics View Post
    did you clean the board carefully with acetone to wipe off any solder stripper ??? especially under the caps ...

    next step will be verify your caps value ( SMD not marked ...) and Xtal data ...

    may be could we have an eye on your program ??? ...

    Alain

    BTW ... could you try to run the PIC @ 10 mhz ( HS_OSC ) ... just to see if any life aboard.
    I did clean the board thoroughly with alcohol to get rid of flux, etc.

    Ive tried every cap value I have. At the moment I've actually replaced the SMD caps with 22pF thru-hole caps soldered onto the SMD pads as a test, but that didn't help either.

    Unfortunately I dont have data on my crystal. The place I bought it didn't supply data or a specific manufacturer/model number.

    When this started happening I reduced my program to a bare minimum to test if it is running. After trying 10mhz with HS_OSC (which didnt make a difference), the code im using is:

    Code:
    DEFINE OSC 10

ADCON1=%01111111

LCD_DB4         VAR PORTA.4
LCD_DB5         VAR PORTA.2
LCD_DB6         VAR PORTA.3
LCD_DB7         VAR PORTB.0
LCD_RS          VAR PORTA.0
LCD_E           VAR PORTA.1
LCD_Lines       CON 2    
LCD_DATAUS      CON 50 
LCD_COMMANDUS   CON 2000

INCLUDE "LCD_AnyPin.pbp"

PAUSE 200

LCDOUT $FE,1,$FE,2,"Hello World!"

END
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  5. - 4th September 2010, 12:38 #5
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    Try a simple BLINKY on a non ADC pin for a test.
    Tooo many things could be wrong with the other stuff.
    Dave
    Always wear safety glasses while programming.
  6. - 4th September 2010, 12:41 #6
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    Quote Originally Posted by Kamikaze47 View Post

    didnt make a difference), the code im using is:

    Code:
    DEFINE OSC 10
 
ADCON1=%01111111
 
LCD_DB4         VAR PORTA.4
LCD_DB5         VAR PORTA.2
LCD_DB6         VAR PORTA.3
LCD_DB7         VAR PORTB.0
LCD_RS          VAR PORTA.0
LCD_E           VAR PORTA.1
LCD_Lines       CON 2    
LCD_DATAUS      CON 50 
LCD_COMMANDUS   CON 2000
 
INCLUDE "LCD_AnyPin.pbp"
 
PAUSE 200
 
LCDOUT $FE,1,$FE,2,"Hello World!"
 
END
    Do you remember PORTA.4 is an open collector pin ... ???

    ... and you could use pause 500+ instead of 200. some displays are a bit lazy ...
    Last edited by Acetronics2; - 4th September 2010 at 12:44.
    ************************************************** ***********************
    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 " !!!
    *****************************************
  7. - 4th September 2010, 12:47 #7
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    Quote Originally Posted by Acetronics View Post
    Do you remember PORTA.4 is an open collector pin ... ???

    ... and you could use pause 500+ instead of 200. some displays are a bit lazy ...
    I added a pullup resistor to PORTA.4

    It's definitely the osc because if I leave it running for 15 mins or so it does eventually display "Hello World!" extremely slowly.
    "I think fish is nice, but then I think that rain is wet, so who am I to judge?" - Douglas Adams
  8. - 4th September 2010, 12:56 #8
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    Quote Originally Posted by Kamikaze47 View Post
    I added a pullup resistor to PORTA.4

    It's definitely the osc because if I leave it running for 15 mins or so it does eventually display "Hello World!" extremely slowly.
    I think so ... now.
    Xtals also can be a bit lazy ... depends on the " cut "

    don't you have a 12 or 16 Mhz Xtal ... ( I recently saw a 18F overclocked @ 80 Mhz !!! ... ) 48 Mhz is easy, 64 might work.

    Alain
    ************************************************** ***********************
    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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