Yes, that is also something I'm considering for the next revision of the PCB. Who knew a clock could use an RTC, huh!

Probably a waste of storage space as vacuum tubes and their enclosing universes tend to break down a lot earlier than 2^64 hours after first deployment ;-) You can never know! Especially if using only 450 out of the 512 byte block why bother saving space :P ... write a new NVS entry (consisting of ...

Once again I'm designing weird features into my clock OS/platform. This time I want the settings menu to display a runtime counter on vacuum tube based displays, to be able to tell how many hours the VFD/plasma display has spent actively showing something and/or with the heater turned on. Of course,...

Thanks for the insight! Just tried that, but it seems to have actually made things worse — with a bunch of memw calls splashed here and there it decompresses fine on the second or third attempt, but without interrupts it fails altogether. I wonder if actually it needs to access somewhere in PSRAM fa...

Yes, I considered using a partition too, but the firmware has an OTA function for the data side of things too, and I was thinking of implementing something similar to an online catalog of fonts eventually, so the file system really makes things easier in that regard. As for external libraries, I tho...

I have run into a brick wall with the infamous PSRAM bug again. My firmware uses PSRAM to store fonts, which are loaded from compressed files on SPIFFS. To reduce the firmware size, I used the miniz functions available in the ROM. However here comes the fun part — I load the file temporarily into PS...

I have managed to solve it by cleverly using the already-sacrificed GPIO pin, putting the LATCH signal in the data as suggested above, and the MCPWM peripheral. Basically I can set the MCPWM module to produce a 100% duty cycle, thus a constant logic HIGH. Then it has emergency stop inputs, which I c...

After changing it to this, it can finally do the DMA without taking up CPU: https://github.com/vladkorotnev/plasma-clock/blob/hw-spi/src/display/akizuki_k875.cpp However, the CS line stays idle, so I have to generate my own latch signal (not very successfully, the picture slides across like an old b...

OK, so I have tried to copy the VGA example and adapt it for QIO like this: https://github.com/vladkorotnev/plasma-clock/blob/hw-spi/src/display/akizuki_k875.cpp#L149-L342 However, I don't see any activity on the display bus now whatsoever. Is there something that has changed in the register assignm...

Hello everyone :-) I would like to introduce you to my project that has been around for a while, called PIS-OS. It used to stand for "Plasma Information Screen OS", but ever since support was added for other screen types, it now means "Personal Information Screen OS". It is not a DOS, since there is...