4550 osc

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  1. - 22nd October 2009, 17:32 #1
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    Hmm, I was hoping I wouldn't have to learn what a .asm file was...
  2. - 22nd October 2009, 18:25 #2
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    Quote Originally Posted by MyBuddy View Post
    Hmm, I was hoping I wouldn't have to learn what a .asm file was...
    What ASM?
    This is all about setting the configs like you would with any PIC.
    Dave
    Always wear safety glasses while programming.
  3. - 22nd October 2009, 20:00 #3
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    MyBuddy,
    I just noticed that you are new here. Welcome.

    Here is a must read.
    http://www.picbasic.co.uk/forum/showthread.php?t=543
    Dave
    Always wear safety glasses while programming.
  4. - 23rd October 2009, 05:07 #4
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    Quote Originally Posted by mackrackit View Post
    What ASM?
    This is all about setting the configs like you would with any PIC.
    I was confused with the post from b1arrrk, my bad.

    I think this pic is overly complex ... or I'm overly simple.

    Alright, I'm understanding a little better the fuses, but they look exactly like the options in the MeProg Programmer for this chip ... I'm fairly sure I've tried every possible combination of pertinent bits.

    Comwarrior, I understand what you're saying now, but I am getting some funny errors now:
    Code:
    Symbol not previously defined (_MCLR)
Argument out of range (not a valid config register address)
    I'm guessing that second one is because of the first error. As for the first error, I don't get it... I copied the config bit from the .inc then pasted it over the @ line. Do I need to have line breaks after some point or something?
  5. - 23rd October 2009, 05:13 #5
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    Another thing:

    After I compile with the following config bits:
    Code:
    @ __config _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L &
 _FOSC_HS_1H & _FCMEM_ON_1H & _IESO_ON_1H & _PWRT_ON_2L & 
_BOR_OFF_2L & _BORV_21_2L & _VREGEN_ON_2L & _WDT_ON_2H & 
_WDTPS_32768_2H & _MCLRE_ON_3H & _LPT1OSC_ON_3H & _PBADEN_OFF_3H 
& _CCP2MX_ON_3H & _STVREN_OFF_4L & _LVP_OFF_4L & _ICPRT_OFF_4L & 
_XINST_ON_4L & _DEBUG_OFF_4L & _CP0_OFF_5L & _CP1_OFF_5L & 
_CP2_OFF_5L & _CP3_OFF_5L & _CPB_OFF_5H & _CPD_OFF_5H & 
_WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L & 
_WRTB_OFF_6H & _WRTC_OFF_6H & _WRTD_OFF_6H & _EBTR0_OFF_7L & 
_EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L & _EBTRB_OFF_7H
    ... the MeProg pops up, but I still have to change the config settings on that screen, such as the Oscillator type (it is on HSPLL instead of the HS I have config'ed in the above code).
  6. - 23rd October 2009, 05:13 #6
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    Maybe this will help. I set the configs in code so the *.inc is commented out.
    Below is for a 4550 with a 4Mhx external clocking at 48
    Code:
    DEFINE OSC 48
    @ __CONFIG   _CONFIG1L, _PLLDIV_1_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
    @ __CONFIG   _CONFIG1H, _FOSC_HSPLL_HS_1H
    @ __CONFIG    _CONFIG2H, _WDT_OFF_2H & _WDTPS_512_2H
    @ __CONFIG    _CONFIG3H, _PBADEN_OFF_3H & _MCLRE_OFF_3H 
    @ __CONFIG    _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L &_XINST_OFF_4L
    MCLR nope, MCLRE...
    Dave
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  7. - 23rd October 2009, 16:32 #7
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    the MeProg pops up, but I still have to change the config settings on that screen, such as the Oscillator type (it is on HSPLL instead of the HS I have config'ed in the above code
    HS with PLL enabled is ok... PLL allows USB to be used at diferent clock speed to the main CPU, it's safe to use with PLL even if you don't use USB
  8. - 22nd October 2009, 20:06 #8
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    Quote Originally Posted by MyBuddy View Post
    Hmm, I was hoping I wouldn't have to learn what a .asm file was...
    This has nothing to do with ASM (assembler)
    Take a screen cap of your programmer screen with all your osc config options on and i'll look see if you have anything set wrong...

    :edit
    I've just sorted out my fuse options for use with MPASM... Been meaning to do them but couldn't previously be botherd...

    Now, assuming your using MPASM for compiling this needs to be the first line in your BAS file...

    Code:
    @ __config _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L & _FOSC_HSPLL_HS_1H & _FCMEN_ON_1H & _IESO_ON_1H & _PWRT_ON_2L & _BOR_ON_2L & _BORV_2_2L & _VREGEN_ON_2L & _WDT_ON_2H & _WDTPS_32768_2H & _MCLRE_OFF_3H & _LPT1OSC_ON_3H & _PBADEN_OFF_3H & _CCP2MX_ON_3H & _STVREN_OFF_4L & _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_ON_4L & _DEBUG_OFF_4L & _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L & _CPB_OFF_5H & _CPD_OFF_5H & _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L & _WRTB_OFF_6H & _WRTC_OFF_6H & _WRTD_OFF_6H & _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L & _EBTRB_OFF_7H
    The list of fuse options avaliable for MPASM can be found in C:\Program Files\Microchip\MPASM Suite
    The INC file for the pic contains the fuse options, so for the 18F4550 you need to open the file C:\Program Files\Microchip\MPASM Suite\P18F4550.INC in notepad or Microcode studio or with MPLAB...
    If you don't know what the options are for, thats where searching the datasheet comes in...
    Last edited by comwarrior; - 22nd October 2009 at 20:49.
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