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  1. Replies
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    after reinstall cannot comile

    I change computer and download PBP3.1,my license activation key is for PBP3.0,but it still can be activate,but when I try to compile,error code pop up saying source file is read only cannot...
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    24,693

    MCU with ICSP instead of PGD/PGC

    I try to program MCU with ICSP programming pin but MPLAB X return "The circuit on your board may require you to slow the speed down. Please change the setting in the tool properties to low and try...
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    5,485

    I2C read and write to 24C01 eeprom

    I and difficulty reading and write to the eeprom,the reading instruction I used is

    I2Cread SDA,SCL,$A0,$00,[data1.......data7]
    I2Cwrite SDA,SCL,$A0,$00,[data1......data7]

    all data are define...
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    3,256

    Programming PIC18f45k20

    I try to use the PIC18f45k20 for my next project,I need the LONG variable of the device supported,I'm using the TQFP version and try to use the PICKIT 3 to program it,how do I connect the pickit 3...
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    4,461

    Re: MCU seset and stop

    I figure out the problem,the PIC16F1828 port a,b and C are all analog pin,which need to set it to digital before the LCD sequence
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    4,461

    MCU seset and stop

    I'm not sure why this happened,I. using PIC16F1828 DIP version MCU,without the LCD code,the MCU works fine,after adding the LCD code in,which I copy from my other project using PIC16F877A,the MCU...
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    2,455

    Device does not match

    I try to program the PIC18F24J10 with the U programmer but it return the error Device not match,the MCU is a new device which is just open from the antistatic bag,what can cause this error?
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    Re: Defining Long Variable

    no error reported,thank you,next will try on some basic data gather using the long word and confirm the result ,thank you very much
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    4,745

    Re: Defining Long Variable

    I try tonight,thank you
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    4,745

    Defining Long Variable

    I am using PBP3,try to use PIC18F27J53 to do collect some data and I need the long variable,I use the code var long and it return the error long datatype no supported,use -n option for LONG datatype...
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    3,786

    Internal Osccillator help

    I try to use the Pic18F family of MCU,I notice that it have internal oscillator and need no external crystal oscillator,but how to set it to work?I have try it and nothing happen,the code works fine...
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    3,057

    Re: Need help on PPD42NJ SPI sensor

    Thank you,I can manage to get some meaningful figure now,thanks a lot
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    3,057

    Need help on PPD42NJ SPI sensor

    I have been experiment with the PPD42NJ SPI particle sensor,I can read the pulse width from the sensor output,but how can I convert the reading to a meaningful figure,at least it can give me some...
  14. Re: Programming 16F877a PLCC with the melab programmer problem

    I can program it with a pick it 2 using its pro maker to go function,so I'm sure the mcu is ok,I'm using a adaptor bought from RS components and I've checked the connection,is all ok,and the PIN...
  15. Programming 16F877a PLCC with the melab programmer problem

    I try to rpogram the PLCC version of the PIC16F877A with a PLCC to DIP programmer with the melab U2 programmer but it report the device dose not match the selected device,but I can program the DIP...
  16. Thread: Config help

    by Sabahan
    Replies
    9
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    7,376

    Re: Config help

    I'm using PBP3,seems that there are not much info on the net on this topic
  17. Thread: Config help

    by Sabahan
    Replies
    9
    Views
    7,376

    Re: Config help

    I found something interesting to read,about the config

    http://melabs.com/support/config_defaults.htm
  18. Thread: Config help

    by Sabahan
    Replies
    9
    Views
    7,376

    Re: Config help

    Yes,I read it,it do have some example,but what all those word means?
    CONFIG XINST = OFF
    CONFIG PLLDIV = 5
    CONFIG WDTPS = 512
    CONFIG CPUDIV = OSC1

    This is part of the example,what is all those...
  19. Thread: Config help

    by Sabahan
    Replies
    9
    Views
    7,376

    Config help

    I need to use a crystal of 12 MHz for my project,I read the PBP manual and it state that if the crystal is beyond 4Mhz ,a HS config must be set or the MCU may not work,But they are very limited...
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    10,342

    Re: My board can't start

    After I started this discussion,I made a pcb board,is the same results.


    I didn't notice there is a FOSC in the PBP command,upon checking the reference manual,it didn't have much info on the...
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    10,342

    Re: My board can't start

    I like to know how to check weather the capacitor is good or bad,I have a ESR meter but it only test capacitor smallest to 1 uF

    My crystal is mounted next to the MCU,the capacitor is just next to...
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    10,342

    Re: My board can't start

    I was using a 16Mhz crstal for my project,when I switch the crstal to a 4Mhz crystal,everything fine,I wonder why?i found on the internet for calculating the capacitance,it give this fomular

    C = 2...
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    10,342

    Re: My board can't start

    Yes I am using two capacitor connector each to the crystal
  24. Replies
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    10,342

    Re: My board can't start

    I changed the capacitor to a 56pF cap and it works,but switching back to a 22 pF capacitor the circuit just stop,does this something to do with the load capacitance of the crystal?
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    My board can't start

    I am experimenting the 7 segment display on a breadboard,but the circuit just can't start,but when I touches the capacitor that connect the crystal,it start,when my hand left the capacitor,it can...
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