For the SPI I have the following in my sketch: #include <SPI.h>
In setup: // set up SPI SPI.begin(); SPI.setFrequency(100000); SPI.setBitOrder(MSBFIRST); SPI.setDataMode(SPI_MODE1); //set outputs for SPI pinMode(LEpin, OUTPUT); Then, I have the following code that, in my case, is writing two 32 bit variables ( j and k ) out to the shift registers via SPI: //SPI transfer code digitalWrite(LEpin, LOW); //send K out SPI.transfer((k >> 24) & 0xff); SPI.transfer((k >> 16) & 0xff); SPI.transfer((k >> 8) & 0xff); SPI.transfer(k & 0xff); //send J out SPI.transfer((j >> 24) & 0xff); SPI.transfer((j >> 16) & 0xff); SPI.transfer((j >> 8) & 0xff); SPI.transfer(j & 0xff); digitalWrite(LEpin, HIGH); There may well be a 32 bit Spi transfer but I was modifying older shiftout based code so stuck with what I was doing previously, YMMV. On a Wemos D1, when using SPI, I believe that you are tied to using: D5 for Clock D6 for Strobe D7 for Data I also run the HV5622's as 12V logic levels (keeping within spec) by using CD40109 level shifters, it all works really well. Please let us know how you get on. - Richard On Wednesday, 22 July 2020 08:38:47 UTC+1, Owen Crawford wrote: > > Hi Richard, > > You mentioned you have a working solution to digit fading? > I am pretty much in the position with designing a Nixie clock using the > HV5622 chips. I have worked out most of the PCB design and got a few > prototypes boards made up. > The HV5622 chips are in series and I've managed to make up some code in > Arduino IDE and can control individual pins/digits using ShiftOut() which > is inherently a bit slow with moving data to the registers. > I made up a fade table to quickly transition back and forth between the > previous and next digit to give the illusion of cross-fading. > This worked well for the most part, until I have more than 1 digit fading, > then the latency starts to become more noticeable and the digits star to > flicker in transition. > After countless hours of reading, SPI seems to be the way to go as it's > way faster to shift data out, however I am still in the middle of working > out how to use SPI with the HV5622 registers and Arduino as I'm just > getting random digits appearing all over the place. > I guess the next step after that was working out how to cross fade digits. > Would you be so kind with sharing what you came up with? Better than trying > to re-invent the wheel :) > > Thank you. > > / Owen > > On Sunday, 3 May 2020 at 18:06:15 UTC+10 Dekatron42 wrote: > >> There's another way of dimming/fading described in this thread with >> source code on Github - not mine, just remembered it. >> >> >> https://groups.google.com/forum/#!searchin/neonixie-l/fading$20table%7Csort:date/neonixie-l/bh7kymv2xQA/MogsmOnHAgAJ >> >> /Martin >> > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/e514d49d-6a36-4042-a5bb-fc1efdd11d11o%40googlegroups.com.
