1. Activate USB disk from SETUP → File → Activate USB Disk or alternatively from DMCP System
menu.
2. Connect USB cable from DM41X to PC/Mac computer.
3. Copy the DMCP_flash_x.x_DM41X-y.y.bin file from the PC/Mac computer to root folder of
calculator disk.
4. Eject (safely remove) the calculator disk from PC/Mac computer. Please, be patient this can
take some time. Don’t unplug USB cable until safely ejected from OS.
5. Calculator detects presence of new firmware file and asks for update. You can confirm it
immediately or press [ EXIT ] key and activate flashing process later using Flash firmware from
FAT either from DM41X program SETUP → System or directly from DMCP System menu Enter
System Menu
6. Once finished the calculator resets and should restart to updated DM41X.
7.2. Bootloader mode activation
Bootloader mode can be activated from main Setup menu: SETUP → System → Bootloader or by using
RESET and PGM button.
The sequence of entering bootloader mode using RESET and PGM button is:
• Press and hold PGM button
• Press and release the RESET button
• Release the PGM button
Older models have both buttons accessible through the holes in the calculator backplate. Newer
models have hole in the backplate for RESET button only, therefore the backplate should be
removed first, then use the RESET and PGM buttons directly on PCB.
7.3. FW Update Using dm_tool
Latest version of dm_tool can be downloaded from the Tools web page.
7.3.1. Prerequisites for Windows
You have to install libusb driver as described here: http://technical.swissmicros.com/doc/
libusb_install/libusb_install.html.
7.3.2. Prerequisites for Linux
USB device access rights
This configuration is optional.
You can allow access to the DFU device for users in plugdev group by running as root:
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