Mclr As Input Pin?

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  1. - 20th December 2007, 06:57 #1
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    Default Mclr As Input Pin?

    how can i define MCLR as input pin in picbasic pro ( my chip is 12c508a)
  2. - 20th December 2007, 08:17 #2
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    In the *.inc file for the chip in the PBP directory, change MCLRE_ON to MCLRE_OFF
    Dave
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  3. - 21st December 2007, 07:22 #3
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    thanks for your help
  4. - 23rd December 2007, 13:15 #4
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    I have tried it too - but the MPASM reports an error when using porte.3 on a 18f2431, he doesn't know the pin !!!
    PBP 2.50C, MCS+ 3.0.0.5, MPLAB 8, MPASM 5.14, ASIX Presto, PoScope, mE mikroBasic V7.2, PICKIT2
  5. - 23rd December 2007, 19:51 #5
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    It's not a PBP problem, it's a Microchip p18F2431.inc file problem. Seems they forgot to add it in their LAT/PORT/TRIS list...

    BUT, erm, erm.. let's see a datasheet quote...
    10.5 PORTE, TRISE and LATE
    Registers
    Note: PORTE is only available on PIC18F4331/
    4431 devices.
    on the other hand...seems they also forgot their own quote
    10.5.1 PORTE IN 28-PIN DEVICES
    For PIC18F2331/2431 devices, PORTE is only
    available when master clear functionality is disabled
    (CONFIG3H<7> = 0). In these cases, PORTE is a
    single bit, input-only port comprised of RE3 only. The
    pin operates as previously described.
    So, just add TRISE/LATE/PORTE to the .inc file and i'm sure it will work
    Last edited by mister_e; - 23rd December 2007 at 19:56.
    Steve

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  6. - 23rd December 2007, 20:31 #6
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    Angry

    Yes - it's a mistake of MICROCHIP - even the support says, there is a porte.3, but they don't realize to kick the MPASM-kids the ass...
    PBP 2.50C, MCS+ 3.0.0.5, MPLAB 8, MPASM 5.14, ASIX Presto, PoScope, mE mikroBasic V7.2, PICKIT2
  7. - 24th December 2007, 00:00 #7
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    Make sure to read the ds on this pin. I use the mclr as an input in an application, but wasted one before I learned a trick... make sure to pause for a couple seconds before you change the setting to turn it into an input. If you don't, then you may not be able to reprogram it.
  8. - 24th December 2007, 06:33 #8
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    using a jdm programmer?
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