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Type: Posts; User: John Drew

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    Re: Is SPI SHout interruptible

    Thanks Stephen, that info is really helpful. I'm pretty sure I can get this working now.
    Thanks everybody for your replies.
    John
  2. Re: CF Declares gone awry in latest release??

    The requirement for the word 'Declare' did change so some old examples may have that missing. Just a thought. Don't know if that is your issue .
    John
  3. Re: CF Declares gone awry in latest release??

    Won't be a licensing issue. There is only one version of the compiler. If no dongle then only 'free' pics will compile.
    John
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    Re: Is SPI SHout interruptible

    Thanks everyone,
    @Henk - In between the I2C bringing data into the PIC it has to do things with it and then pump it out the SPI to a voice recorder/player so a straight out converter won't do the...
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    [SOLVED !] Re: Thumbs up system being abused

    I've had no reports of abuse. Things seem to have returned to normal thanks Lester.
    John
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    Re: Is SPI SHout interruptible

    OK, I'll give it a try. Did you see my query regarding the I2C_slave.bas?
    John
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    Re: Is SPI SHout interruptible

    Second question.
    This code from the I2C_slave.bas doesn't look right.



    ' I2C slave subroutine
    i2cSlave:
    SSPIF = 0 ' Clear interrupt flag
    If R_W = 1 Then...
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    Is SPI SHout interruptible

    I'm working on a new project. Effectively it's an expansion for an existing project, so the new project is listening to an i2c output from the main controller. It's using slave I2C as per Les'...
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    Re: Programmable RF oscillators

    Les/Charlie,
    I've sent you an email with some comments on the oscillator at certain frequencies. I suspect the spurii mentioned are a result of the magazine's use of a less accurate method of...
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    Re: 16f1503 AND PWM modules

    I watched one of Dave's engineering blogs yesterday and he got caught by a hardware fault in the micro. He recommended always checking the errata for the device. His issue was related to a device...
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    [SOLVED !] Re: Thumbs up system being abused

    Must admit I'd forgotten about the moderation of new users.
    Sorry about that.
    John
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    Re: Programmable RF oscillators

    Charlie,
    The latest copy of the SC mag has a comment from a person who is finding some errors in frequency and some spurs that appear around but not on 1500MHz.
    I'll get more info to you via email....
  13. John Drew has just uploaded Proton 24 manual!

    John Drew has just uploaded Proton 24 manual!

    Latest version as of July 2018
  14. John Drew has just uploaded Latest manual for Proton!

    John Drew has just uploaded Latest manual for Proton!

    Latest Proton manual as of July 2018
  15. Re: CF Declares gone awry in latest release??

    Hi Sean
    That would not be the latest manual. I uploaded that ages ago and was intended to give non users an idea of what the compiler could do.
    I had better update it later today.
    We'll have to...
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    [SOLVED !] Re: Thumbs up system being abused

    I don't know Henk, that is beyond my knowledge and permissions. The problem is that we don't want to have a system too hard to access and even if we had a system of approval for new members (and...
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    [SOLVED !] Re: Thumbs up system being abused

    Hi Henk,
    The thumbs up is a great way of saying thanks, and there are many users who well and truly earn them. However, I think there is a bot running from a computer, probably not a real user who...
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    [SOLVED !] Re: Thumbs up system being abused

    Can you please PM me with user names who are doing frivolous thumbs up and I'll remove their thumbs up and if necessary BAN the users.
    John
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    Re: Dim xxx as code problem on P24

    Charlie contacted me by email.
    He's got PDS going again with an old version of Win10 and an old version of Proton.
    Unfortunately in the process he's lost the forum password so can't post.
    He'll...
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    Re: New PICkit 4 available

    Bit worried my pickit3 might fail one day so being in a good mood as my PSA is still <0.03 and parts are freight free from MicrochipDirect this month I lashed out and bought a PICkit4.
    That may be a...
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    Re: Hx711 calibration

    Hi Alberto
    I have changed the title (but not the link) so that the 8 is prominent, otherwise people may miss the fact that it now covers up to 8 displays.
    I'll send you a private message on a...
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    Re: Why a delay in TX power up?

    I'll be interested in the results Norm.
    John
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    Re: Why a delay in TX power up?

    Hi Norm,
    The easiest way to check if it is TX or RX is to program the squelch on a radio that is to be tested at a distance to 0 so that the radio is noisy at all times. Then see if at a distance...
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    Re: Why a delay in TX power up?

    I think this may possibly confirm that it is a receiver issue. A lot depends on whether the handhelds use noise operated mute or carrier operated mute. Carrier operated systems can be quite slow to...
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    Re: Why a delay in TX power up?

    It could be a power issue but is more likely to be a receiver issue.
    The handhelds I own put their receivers to sleep to save power. They wake from time to time to check the frequency.
    Could it be...
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    Re: Programmable RF oscillators

    Thanks Charlie, when you get the chance. Work and family come first.
    Cheers John

    PS Is pin 20 accessible, just looked at Les's photo of the board - lots of tiny pins!
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    Re: Programmable RF oscillators

    Les, the pin 20 sounds like the way to go. I'd be looking for about 3kHz deviation with a 1kHz tone to be most useful. The deviation would vary with device frequency but some maths would deal with...
  28. Re: Code for Driving 2,3 or 4 seven segment displays

    Hi Alberto,
    Sounds good. No hurry.
    Best wishes
    John
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    Re: Programmable RF oscillators

    Thanks Les,
    Not in my immediate project list but it will be one day, especially if the pin20 can accept some modulation.

    A lot of amateur activity nowadays is on digital modes (specifically FT8...
  30. Re: Code for Driving 2,3 or 4 seven segment displays

    Hi Alberto,
    Would you consider putting it in the WIKI?
    Best wishes
    John
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    Re: Cdata and Cread

    The xtal=4 has nothing to do with how fast the micro runs. It is just an instruction to the compiler to calculate delays, baud rates and any other timing matters.
    The declaration should match the...
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    Re: Ferrite transformer question

    They tell me boot polish adds some flavour Charlie.
    We're not talking cricket after those no hopers let us down.
    Sorry about the slang: metho = methylated spirits.
    Back to topic, great explanation...
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    Re: Ferrite transformer question

    I think half turns Charlie.
    If you ever use Litz wire (and I've still got some in the junkbox) the easiest way to access the wire itself is to dip the end in metho, light the end and it will burn...
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    Re: Ferrite transformer question

    You can definitely have part turns.
    It's well illustrated when dealing with RF. for example you can pass two wires through a ferrite bead as a 1:1 transformer. Voltage is coupled 1:1 to the sensing...
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    Re: Cdata and Cread

    Hi LordFrank1
    Glad you've made progress. Users on this site will always help others if they can and it encourages us when people like you have a shot at creating something first before asking for...
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