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Type: Posts; User: charliecoultas

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    Re: Cheap programmer or waste of money

    A question that has worried me and some others on the forum is this:

    Does PicKit2 use flash ram internally when you program a chip? In other words, is the life of PicKit2 so many thousand...
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    I dont belive it ! Re: Back in time looking good !

    I'll take some photos for you on Monday to show you the 807's.
  3. Re: LCD05 I2C interface to HD44780 LCD display

    Thanks Les.
  4. Re: LCD05 I2C interface to HD44780 LCD display

    Yes that's an option. Speed is fairly important but it's not essential. Thanks.
  5. Re: LCD05 I2C interface to HD44780 LCD display

    Thanks Les, that's what I remembered seeing.

    Would this work on a P24 chip?
    Charlie
  6. Re: spi interface to HD44780 LCD display

    George, Rick

    Thanks, you've set me in the right direction. I'll get one of the hardware backpacks and take it from there.

    Charlie
  7. spi interface to HD44780 LCD display

    Not very long ago I saw an article by Les about driving a standard HD44780 LCD via spi.
    Could somebody kindly point me in the right direction, I can't find it.

    I want to drive a 40x2 LCD but I...
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    Re: Can some kind soul explain this

    Neat, very neat!
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    I dont belive it ! Re: Back in time looking good !

    The Colossus computer uses 807's where a hefty pulse is needed that is distributed to several sections, counter resets etc.
  10. Re: Replace existing async with sync

    As Dave says, a USART is much more efficient than big-banging it yourself. It does everything "outside the loop" and tells you when it's done. Also, sync comms (using a USART) needs in/out data AND a...
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    Re: Ethernet to RS232 converter

    Looks very interesting George.
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    Re: Remote programming with Pickkit2

    I often power the circuit from PK2, and am surprised how current it can deliver. What did you find that makes you say never to do it?
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    Re: Baud rate problem

    I meant that if I compiled on desk pc it failed, if compiled on laptop it worked. The rs232 comms was between a 24 series chip and a music player. Very odd as both vsns of compiler were latest.
    ...
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    Re: Baud rate problem

    Nothing to do with the PC George, problem is confined to the 24HJ128GP502 chip.

    No serial ports involved, just a 115,200 inerface to a VLSI VS1000 music module, which is part of a model for the...
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    Re: Baud rate problem

    I'm setting the baud rate of a 24HJ128GP502 PIC George, thankfully there's no Windows involvement.
    The "desktop PC" holds the compiler, sorry but I can see the possible confusion. The PIC is...
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    Re: Baud rate problem

    Thanks Les, Norm. I tried using my laptop to compile and the results differ. My desktop PC has the problem, the laptop gives the right result. Same vsn of compiler, 1.0.5.1 on both. U1 is set to...
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    Re: Baud rate problem

    By trial and error I have got it working. I output 10 bytes and kept adjusting the serial baud rate until the ten bytes took 830uS on the scope. The Hserial_Baud was setting 530,000. The music player...
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    Re: Baud rate problem

    Thanks Simon, that helps.

    Yes Norm, it works fine at 9600. I tried a few different Declare HsSeirial_Baud = with the following result:

    9600 about 1mS byte width which seems right
    19200 ...
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    Baud rate problem

    I am trying to run one of the USARTs on a 24HJ128GP502 at 115,200 bits/second.

    I thought I had defined the clock frequency wrong but Delayms gives the expected result on my scope.

    I'm pretty...
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    I dont belive it ! Re: Back in time looking good !

    Round The Horn: Apparently the BBC were quite unaware of all the double-entendres that Kenneth Williams and others put into the show for quite a long time.
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    Re: Valid time in NMEA sentance

    I found that certain U-Blox receivers were a few seconds out until the Leap-Second-Correction had been applied. This is applied every 12.5 minutes.

    See here:...
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    Re: I'm over the moon with joy. :-)

    Well done Les!
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    Re: Self update PIC

    Several folks on this forum have done a lot of work with "bootloaders". Try searching for that.
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    I dont belive it ! Re: Back in time looking good !

    Going back even further, who remembers: Mrs Dale's Diary, Take It From Here, The Goon Show, Forces Favourites, The Navy Lark (all on radio). On TV: Muffin The Mule (before it was made illegal), Andy...
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    Re: Barking dog

    I'll bet Fanie has a suitable suggestion.......
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    Re: Internal clock calibration

    I have used a few of these on "clocks" and yes, they work indoors. But I'm not sure they would be work in multi-story buildings. Some of these cheap GPS, with antenna, give the time a few seconds out...
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    Re: Internal clock calibration

    Even if you got the clock exactly in step with GPS, I would guess that subsequenty, as the temperature changed, the clock would drift.
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    Re: 16f753 DAC

    What happens when you try to run it?
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    I dont belive it ! Re: Back in time looking good !

    My passion for electronics came from a guy who lived opposite us called Mr Greenwood. I must have been about 7 or 8. He made me a crystal set in a lovely polished wooden box. That got me started. The...
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    I dont belive it ! Re: Back in time looking good !

    Oh yes they did.
  31. Re: Dongle Issues with Windows 7 64 Bit. Making it difficult to use already purchased

    Yeah. It sounds as though you're having fun with 3D printing. We made a few 3D things at work and de-lamination was a problem.
    I like your idea of driving 7 seg displays with 8 bit latches, I wish...
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    [SOLVED !] Re: How to invert BYTE order

    Try something like this:

    Dim AAA As Byte 'the byte you want to reverse
    Dim BBB As Byte 'reversed result
    Dim K As Byte
    Dim MyBit As Bit 'work bit

    For K = 0 To 7
    ...
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    [SOLVED !] Re: How to invert BYTE order

    I think he wanted to swap the positions of the bits, not invert the whole thing,
    Les did a smart routine some time ago but I can't remember where.

    Charlie
  34. Re: Update on procedures in the Proton BASIC Compiler

    Good work Les. You know how much we all appreciate your fabulous work on the compiler, it just keeps getting better and better. Happy New Year to you and everybody.

    Charlie
  35. Re: Dongle Issues with Windows 7 64 Bit. Making it difficult to use already purchased

    Hi Fanie

    Good to hear from you. I'm OK, how about you?

    Charlie
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