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    Re: Easier way to initialize EEPROM

    I don't agree with the manual. I stick Edata at the very end of the code, and it gets put into EEPROM ok.
    But on re-reading your last post I see that this might not be the case!

    ..last line of...
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    Re: Sub-EndSub and Gosub-Return

    Sourcing. It would be sinking if the LED/resistor came from +Vcc. 4mA will light a bright blue led with a 4.7k resistor (5V) very nicely.

    Thanks for the PicKit 3 info George, I will rethink.
    ...
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    Re: Sub-EndSub and Gosub-Return

    Thanks George - the 18F26K22 also does 64Mhz without external xtal. If it really had 8MB of RAM that that would be amazing! I assume you meant 8K. The 12 bit ADC is appealing and yes, I still use...
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    Re: Sub-EndSub and Gosub-Return

    That's an interesting question Les. Why, if you have discovered the wonders of the 16 bit devices, would you return to the 8 bit jobbies? I did that, and I will try to explain why I have returned to...
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    Re: My New PCB

    I've had quite a few different PCB's made by a company in China called Elcrow. (www.elcrow.com)
    Very good quality, size limit of around 10cmx10cm but the cost is remarkable: <$5 for 5 boards...
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    Re: Programmable RF oscillators

    I don't think so John. The module seems to have a "reference" input but I think this has been fulfilled with an on-board crystal.
    But I might be wrong, I am not truly comfortable in the RF area but...
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    Re: Programmable RF oscillators

    Les, John: I've just ordered from from Banggood, around 15 UK. Les, I won't be using mine until I get the other board working (25KHz-160Mhz) so I could let you play with mine if you like?

    Charlie
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    Re: Programmable RF oscillators

    Wow! Exactly what I was looking for. Many thanks John. I have started on the earlier board from Adafruit so I'll get that going first then migrate to the AD device. Yes, Banggood do it for a good...
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    Re: Programmable RF oscillators

    I got mine from the same place, 8 including shipping.
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    Re: Programmable RF oscillators

    G'day John
    Many thanks for the info: I've ordered a "little board" with the si5361a on it and am confident that I can adapt the software you provide in the Wiki. It looks like a very good starting...
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    Re: Programmable RF oscillators

    John: Just found your (and Les's) code in the Wiki, very impressive!
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    Re: Programmable RF oscillators

    Thanks John. Yes, the SI5351A looks very good but it only goes to about 133MHz although developing an algorithm would be pretty straightforward.
    Is there a chip/board that goes to say 450MHz that...
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    Re: Programmable RF oscillators

    Thanks Rick, I'll look into that. I am in waters that I am not familiar with (RF). We are trying to measure the bandwidth of a digital scope, and I understand that this can be done "automatically"...
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    Re: Programmable RF oscillators

    Thanks John, it helps....

    Charlie
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    Programmable RF oscillators

    Could somebody point me in the right direction please?
    I need to generate frequencies from about 20Mhz up to around 500Mhz. I have seen "programmable oscillators" mentioned but I can't seem to get...
  16. Thread: Nsoic-8

    by charliecoultas
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    Re: Nsoic-8

    Some things on this forum are a bit mysterious, thanks.

    Charlie
  17. Thread: Nsoic-8

    by charliecoultas
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    Re: Nsoic-8

    Gamboa - thanks.


    basiclover - the attachment didn't attach?

    Charlie
  18. Thread: Nsoic-8

    by charliecoultas
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    Nsoic-8

    Can somebody tell me the dimensions of the surface mount pattern NSOIC-8 please?
    The device is a MAX541CCSA+ DAC.

    Thanks
    Charlie
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    [SOLVED !] Re: CDATA oddities?

    It's something to do with the "continuation" character on the line "as word"

    Alter it to this:

    knots_lookdown: 'pressure value 1 for 20 knots is 660, 399 values
    CData As Word...
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    Re: Slightly surprised by 18F26K22

    Slightly to the left of this topic: I once connected an encoder to PORTB.6 and 7. I couldn't for the life of me find out why my PicKit2 would sometimes program OK and sometimes not.
    The reason was...
  21. Re: Them interrupts, them interrupts, they drive me mad!

    Change your code within context save/restore like this:

    Context Save

    OldPos = NewPos
    NewPos = (PORTB &...
  22. Re: Them interrupts, them interrupts, they drive me mad!

    As George says, there are different types of encoder. If yours works with a Panasonic encoder then you are on the right lines. There is no need to disable ints during an int, the chip automatically...
  23. Re: "Microsoft ahead in race to produce a quantum computer"

    Good comment!
  24. "Microsoft ahead in race to produce a quantum computer"

    Start worrying - Microsoft seem to be ahead in the race to produce a Quantum Computer

    http://www.bbc.co.uk/news/technology-43580972

    It has taken them 50 years to produce Windows10 (tm...
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    Re: Is Isr EndIsr current?

    Thanks Les. But "vectored interrupts" and "high/low priority interrupts" sound like two different things to me.

    High/low: I assume to mean that if, say, a USART interrupt happens because we have...
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    Re: Is Isr EndIsr current?

    Joseph

    I think that you just go ahead and code two interrupt service routines; one for high and one for low (as George showed). A high level int will then interrupt a low level int if it happens...
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    Re: Is Isr EndIsr current?

    George: I have to thank you! I have always avoided the two priority levels of interrupts because I thought it was horribly complicated.
    But your template shows that it is in fact elegantly simple! ...
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    Re: PIC 24f Memory write

    Applying any form of logic to the decisions that Microchip make is a novel idea.

    Charlie
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    Re: Mid$ not recognised

    I reckon that's right John. I am currently inputting a WIKI article about my clock, the code for parsing the NMEA sentences is shown but I don't use the 1 second pulse.
    The one second pulse is a...
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    Re: Mid$ not recognised

    The one-pulse-per-second output from the GPS module is the sync signal to the time just given in the NMEA sentence. A bit like the speaking clock.

    Charlie
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    Re: Mid$ not recognised

    Found the answer: the GPS system has "leap seconds" added but some of the GPS receiver manufacturers apply it differently to others.
    To compensate for this the GPS system transmits a "leap second...
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    Re: Mid$ not recognised

    George

    The Aussies are as good at getting software to work first time as they are at cricket, at the moment.

    The real purpose of this post is to ask if you have noticed that "some" GPS modules...
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    Re: Infinity focus of convex lens

    Surely, a "point sized" object would be small, and not have any "characteristics"?

    Charlie
  34. Re: anyone used 16F1713 through 16F1719?

    Wow, something that is straightforward and works first time. Thanks for sharing.

    Charlie
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    Re: Moved to say thanks to Les

    I'll second that.

    Charlie
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