Search found 192 matches

by ijabbott
Mon Apr 13, 2020 1:55 am
Forum: Software Library
Topic: RTC Calibration program
Replies: 32
Views: 17862

Re: RTC Calibration program

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: ...
by ijabbott
Sat Apr 11, 2020 6:32 pm
Forum: OFFIMG library
Topic: The Manchester Bee
Replies: 1
Views: 1058

The Manchester Bee

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.

The Manchester Bee
The Manchester Bee
manc_bee.bmp (12.31 KiB) Viewed 1058 times
by ijabbott
Sat Apr 11, 2020 4:10 pm
Forum: OFFIMG library
Topic: Dutch Lion
Replies: 24
Views: 5204

Re: Dutch Lion

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...
by ijabbott
Sat Feb 01, 2020 9:37 pm
Forum: Hardware issues
Topic: BAT indicator stuck on
Replies: 19
Views: 5726

Re: BAT indicator stuck on

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...
by ijabbott
Sat Feb 01, 2020 12:53 pm
Forum: Software issues
Topic: Naïve Analysis of TRNG
Replies: 34
Views: 2014

Re: Naïve Analysis of TRNG

Does this use the STM32's hardware RNG (which is based on an analog circuit)?
by ijabbott
Sat Feb 01, 2020 12:42 pm
Forum: Hardware issues
Topic: BAT indicator stuck on
Replies: 19
Views: 5726

Re: BAT indicator stuck on

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.
by ijabbott
Sat Feb 01, 2020 12:00 pm
Forum: DM41X
Topic: DM41X Beta Programme
Replies: 326
Views: 27791

Re: DM41X Beta Programme

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...
by ijabbott
Fri Jan 03, 2020 6:12 pm
Forum: DM42
Topic: Firmw update issue on Windows 10
Replies: 5
Views: 3010

Re: Firmw update issue on Windows 10

Which firmware are you on at the moment? Is it recent enough to handle firmware updates using the FAT disk update method?
by ijabbott
Sat Nov 23, 2019 10:20 pm
Forum: Developer Forum
Topic: Building a .pgm on Windows
Replies: 6
Views: 4307

Re: Building a .pgm on Windows

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.
by ijabbott
Sat Nov 09, 2019 2:11 pm
Forum: Hardware issues
Topic: USB-host (USB-OTG)
Replies: 5
Views: 3401

Re: USB-host (USB-OTG)

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).