the ultrasonic SRF04 with pic16f88

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  1. - 17th March 2008, 01:04 #1
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    Quote Originally Posted by tur_bot View Post
    i just tryied to use the external clock again.
    but it is still not working.
    any one with an idea, please ??????
    Re-read post #2 and post #4...
    Look at your program...
    Take a good look at PortA.0
    Compare PortA.0's function from the datasheet to what you are trying to do with it...

    Get back to us with the results...
  2. - 17th March 2008, 02:43 #2
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    Default what do you mean

    what do you mean by check porta.0 , read post2 and 4 ????? do you mean that the porta.0 is analog and I shouldn't use it for digital signals input????

    anyway , I moved the echo signal to differents port.b's and port.a's and nothing changed.

    I tested few portB input pins with infrared detectors ( which worked fine) but when the echo input signal, is connected to the same portb that i just tested , and the trigger signal output (connected to portb output pins that i tested with LEDs) of my srf04 are connected , nothing is working

    can you tell me clearly what do you have in mind please???
  3. - 17th March 2008, 03:33 #3
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    Have you seen this?
    http://www.picbasic.co.uk/forum/showthread.php?t=561
    Dave
    Always wear safety glasses while programming.
  4. - 17th March 2008, 05:49 #4
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    Talking thank you so much

    thank you so much. you are a star
    finally everything is working with internal clock and measurements well displayed on the lcd.

    wasn't that easy to understand the data sheet but because of all of you guys, with all your examples and suggestions , i managed to find the right settings.

    again thank you guys
    God bless you all
  5. - 17th March 2008, 16:17 #5
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    Quote Originally Posted by tur_bot View Post
    wasn't that easy to understand the data sheet but because of all of you guys, with all your examples and suggestions , i managed to find the right settings.
    Just curious...which bit fixed the problem?
    Invariably, it's usually that one little bit that fixes everything...
  6. - 20th March 2008, 17:20 #6
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    Default which bit fixed the problem

    Quote Originally Posted by skimask View Post
    Just curious...which bit fixed the problem?
    Invariably, it's usually that one little bit that fixes everything...
    those 6 lines allowed me to use an accurate inside clock and to use all pins as digital input or outputs:

    DEFINE OSC 4
    INTRC_OSC_NOCLKOUT
    INTRC_IO
    OSCCON=%01101000
    ANSEL=%00000000 'this comand disable all adc
    CMCON=%00000111 'this bit disable all comparators


    the two last commands fixed the problem to get just digital inpout and outpout on all 15 pins available, and disabled all adc and comparators.
  7. - 20th March 2008, 17:24 #7
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    Quote Originally Posted by tur_bot View Post
    the two last commands fixed the problem to get just digital inpout and outpout on all 15 pins available, and disabled all adc and comparators.
    Just like posts #2, #4, #8, #10 said it would...
  8. - 17th March 2008, 04:19 #8
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    Quote Originally Posted by tur_bot View Post
    can you tell me clearly what do you have in mind please???
    Nope...I don't have your circuit running with your software running on your hardware programmed by your programmer.
    There are numerous differences between the 16F84 and the 'F88. I'm not going to spell them all out because they're already in the datasheets.
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