Recent content by fernando_g

  1. fernando_g

    Hippy status, rev 2.0

    Model Railways. Yet another excellent use for a Picaxe.
  2. fernando_g

    Hippy status, rev 2.0

    Thanks for the explanation, Technical. We understand fully. This pandemic has ravaged many economic sectors. In a storm, a ship has to batten down the hatches.
  3. fernando_g

    hspiout setup for output only (to PGA2311)

    Popchops; Did you ever solve your issue? I am having the exact same situation, where I require to shift serial data out to drive a Texas Insts DAC7714. For this device, the clock must idle high. However for the lone 28X2 I got, while loading the program the firmware vB.3 gives me an error...
  4. fernando_g

    Hippy status, rev 2.0

    It is almost a year (June 11), that Hippy last posted here. An explanation was provided by RevEd that, due to the pandemic, he had been placed in “administrative furlough”, or words in that extent. Now that it appears that the whole World is getting back on their feet, is Hippy coming back...
  5. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    FWIW I also found a SALEAE Logic capture I had made on the AXE033 being driven by I2C, and a full row update transmission, including the I2C address, the initial character position and all 16 individual ASCII characters would take 15 msecs.
  6. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    Pete; thanks for your contribution! I’ll study it in detail. Indeed OLED based displays are fantastic! In comparison the LCD supertwist displays are so…..1990s.
  7. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    Thanks for the offer, Alan. I am using a 14M2, but might, just might be able to use some older 14M that I have lying around. But you have given me an excellent hint: chopping the message. The simplest implementation would be to update the top row first, go back to the main routine and then...
  8. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    Let me explain my conundrum: I have a project with a very tight loop. The 140 msecs that takes to send the 8 bytes separated by spaces at 2400 baud to the display, causes the display to skip or corrupt some values. I was hoping that I2C would shorten the transmission time. But I have seen...
  9. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    Thanks Alan, you are absolutely correct. I remembered (finally!) the name of the project where I had used I2C for the display, and found that I did have to perform a BINTOASCII conversion before sending to the display.
  10. fernando_g

    AXE033 with I2C input, can't accept ASCII variables?

    I have had an AXE033 for several years to debug my projects, but I have been out of practice related to operating it with I2C that somehow I can't make it work. For instance, if I use the serial input to display 8 bytes separated by a space, It compiles and works just dandy: Serout B.5,N2400...
  11. fernando_g

    08M2 PV MPPT Charge Controller

    Two thumbs up for this very, very interesting project. You have everything, or most everything already figured out, but I would still like to provide my two yen. The Micrometal's mix-26 core material is a very widely used material, as it is extremely forgiving with respect to saturation and...
  12. fernando_g

    28x2 MPPT Success, 50v 35amp ,2.1Kw Panels

    The best approach to test a MPPT algorithm: While monitoring and recording volts and amps in real time, cause a disturbance yourself. I.E, briefly put a towel over the array. If the power point recovers up to its maximum again when the towel is removed, with a very small undershoot as it exceeds...
  13. fernando_g

    Accurate Frequency Counter (0 - 65MHz)

    Thanks Kranenborg, for the update of a real “classic” PICaxe project. I have also used the 28X because of its external oscillator capability. In one instance where I required very high precision, I actually employed the 10 Mhz signal from a GPS disciplined oscillator.
  14. fernando_g

    Downloading programs on a 3.3V powered Picaxe

    Thanks Alan, for the advice. A trick I have learned the hard way is to never hard-wire any unused PICaxe pins. Nowadays I always leave 0805 placeholders on the PWB, which more than once has allowed me to expand a project. Fortunately this was the case here!
  15. fernando_g

    Downloading programs on a 3.3V powered Picaxe

    Edit: I believe that I will have to "deadbug" the 22k series resistor, which I originally did not include.
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