I drained my battery as much as possible and ended at 1760 mV.
It still calculates, but with a little more "power stress" (ie entering the OFF/Suspend mode) the calculator remains in some undefined state (display flickers) and even needs the power grid to reset.
Regards
deetee
Search found 54 matches
- Tue Mar 14, 2023 11:47 am
- Forum: DM42
- Topic: When to replace DM42 Battery?
- Replies: 4
- Views: 2736
- Thu Feb 23, 2023 2:37 pm
- Forum: Developer Forum
- Topic: BMP-file format for DM42 - and compatibility to ie GIMP
- Replies: 6
- Views: 2004
Re: BMP-file format for DM42 - and compatibility to ie GIMP
Thanks so far. At least my concerns regarding to write proprietary file formats are gone. But it seems to become a GIMP usage problem - and the "colorspace bug of GIMP" seems to be a wellknown problem. When indexed to 1-bit there is no BMP export option to prevent writing colorspace. I tri...
- Thu Feb 23, 2023 1:45 pm
- Forum: Developer Forum
- Topic: BMP-file format for DM42 - and compatibility to ie GIMP
- Replies: 6
- Views: 2004
Re: BMP-file format for DM42 - and compatibility to ie GIMP
Thanks for your fast help: * I tried MS-Paint but obiously with a wrong palette - thanks - at least this works. * I managed to select in GIMP the Image>Mode>Indexed Options "Use black and white ..." and "Remove unused colors ...". But when doing the ExportAs and selecting the Fil...
- Thu Feb 23, 2023 11:36 am
- Forum: Developer Forum
- Topic: BMP-file format for DM42 - and compatibility to ie GIMP
- Replies: 6
- Views: 2004
BMP-file format for DM42 - and compatibility to ie GIMP
Hello! I'm trying to write a program for the DM42 that uses some pixel oriented graphics (some kind of very simple Powerpoint/Photoshop application). Central part of this is a 100x48 pixel monochrome image format which should be compatible with the BMP image file format specifications (similar to th...
- Thu Feb 16, 2023 12:05 pm
- Forum: DM42
- Topic: When to replace DM42 Battery?
- Replies: 4
- Views: 2736
Re: When to replace DM42 Battery?
Good question. I made tests with the DMCP function read_power_voltage(). When there is power via USB this function delivers stable 3051 (mV) My battery is quite drained but still works fine with 2064 (mV) There is also a function get_lowbat_state() which signals a low battery, but I couldn't find a ...
- Mon Dec 05, 2022 6:51 am
- Forum: Developer Forum
- Topic: RACK42 (Version 2) - A Spreadsheet (and more) for the DM42
- Replies: 0
- Views: 2512
RACK42 (Version 2) - A Spreadsheet (and more) for the DM42
Hi! I proudly present version 2 of RACK42 - the spreadsheet application (and more) for the DM42 hardware. What started as an "experiment" (see https://forum.swissmicros.com/viewtopic.php?f=20&t=3302 ) became my favor DM42-application (even if there is IV42). For more information have a...
- Thu Nov 17, 2022 6:41 am
- Forum: Developer Forum
- Topic: Memory used by DMCP
- Replies: 1
- Views: 1744
Re: Memory used by DMCP
Maybe that helps:
There is some memory allocation in the linker file stm32_program.ld:
FLASH 704k
RAM 8k
QSPI 2048k
In my file is also a commented allocation with RAM 96k.
I never touched this numbers - for big data areas I use malloc.
Regards
deetee
There is some memory allocation in the linker file stm32_program.ld:
FLASH 704k
RAM 8k
QSPI 2048k
In my file is also a commented allocation with RAM 96k.
I never touched this numbers - for big data areas I use malloc.
Regards
deetee
- Mon Nov 14, 2022 10:24 am
- Forum: DM42
- Topic: Spreadsheet for DM42?
- Replies: 10
- Views: 5395
Re: Spreadsheet for DM42?
Hi Jim! Thank you for your kind words and ideas. What started as an experiment (at least for me) became my favorite DM42 application. I don't know, if you saw it, but RACK42 is discussed on two other location ( https://forum.swissmicros.com/viewtopic.php?f=20&t=3302 and https://www.hpmuseum.org/...
- Mon Sep 12, 2022 9:15 am
- Forum: Developer Forum
- Topic: RACK42 - A Spreadsheet Application for the DM42
- Replies: 9
- Views: 3419
Re: RACK42 - A Spreadsheet Application for the DM42
Great - I'm really relieved. What caused the error?ThirdPoliceMan wrote: ↑Sun Sep 11, 2022 12:21 pmThe error has been found. I will describe the cause shortly.
Regards
deetee
- Fri Sep 09, 2022 11:43 am
- Forum: Developer Forum
- Topic: RACK42 - A Spreadsheet Application for the DM42
- Replies: 9
- Views: 3419
Re: RACK42 - A Spreadsheet Application for the DM42
I will load it on a dm42 to take to HHC to show around. Dear Bob! thanks for promoting RACK42 at the HHC. It's a great honor for me, that my software participates the HHC 2022 (this weekend in Nashville?). Just now I put a recent version of RACK42 on github ( https://github.com/zooxo/rack42 ) named...