SwissMicros Calculator Forum

Does anyone know at what point the ppm display under Setup — Settings gets updated, after changing the rtccalib.cfg file? I've just edited my file, changing from -21 to -22, but the display is still showing -21ppm. I've double-checked the file content (on a PC), turned the DM42 off/on a few times: ...

The worker bee has been an emblem of the city of Manchester in the UK for over 150 years, representing its industrial heritage.

This image is based on one registered by Manchester City Council.

Here's my attempt at the Welsh flag, based on the SVG in Wikimedia Commons. In Inkscape, I changed the colour of the grass to 25% grey and the colour of the dragron to 50% grey, and exported to a PNG of 400x240. In The Gimp, I converted to 1-bit black and white in pattern mode, touched up some stray...

Also check the Vdd value on the DMCP Self Test Diagnostics page. I think it should be reasonably close to the battery potential in millivolts, except when powered by USB. In any case, it's more info for diagnosing the fault. I had noticed that Vdd was odd (1221) yesterday, so assumed it wasn't what...

Does this use the STM32's hardware RNG (which is based on an analog circuit)?

Also check the Vdd value on the DMCP Self Test Diagnostics page. I think it should be reasonably close to the battery potential in millivolts, except when powered by USB. In any case, it's more info for diagnosing the fault.

Just got my Beta unit, wonderful, thanks very much. The BAT indicator is on, I take it that means I need to change the battery? hmm. Changed the battery, put in a fresh CR2032. BAT indicator still on. Tested old and new batteries on a tester: both show as full. Does this indicate a hardware issue w...

Which firmware are you on at the moment? Is it recent enough to handle firmware updates using the FAT disk update method?

It would require reimplementing the functionality of the shell scripts in C or something. An alternative may to build in an MSYS2 or Cygwin Bash shell environment.

Vitasam wrote: ↑

Sat Nov 09, 2019 1:29 pm

Yes, I was thinking about powered USB hub. So, basically it is the only matter of DM42 FW, HW is capable, right?

The STM32 chip supports OTG. I don't think the DM42 is wired up to support it. Amongst other things, it would need a high speed crystal (4-48 MHz).