[DM41] Firmware Update Instructions Out of Order

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[DM41] How to change the number of program steps available
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toml_12953
Posts: 437
Joined: Wed May 03, 2017 5:46 pm
Location: Malone, NY USA

[DM41] Firmware Update Instructions Out of Order

Post by toml_12953 » Mon Jun 12, 2017 12:05 pm

I just updated my DM41 to V23. I found that following the update instructions in order didn't work. If I start the update tool before connecting the calculator to a USB port (as the instructions say to do), the COM port doesn't show up in the firmware update tool. If I connect the calculator then run the tool, the COM port shows up and I can update normally.
Last edited by toml_12953 on Sat Jul 08, 2017 9:16 am, edited 1 time in total.
Tom L

Dyslexia and dieting don't mix. I went on a low-crab diet and didn't lose an ounce.
DM42 SN: 00025 (Beta)
SN: 00221 (Shipping)

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pcscote
Posts: 25
Joined: Tue May 02, 2017 10:12 am
Location: Quebec, Canada

Re: [DM41] Firmware Update Instructions Out of Order

Post by pcscote » Sat Jul 08, 2017 1:15 am

Update note for macOS Sierra v10.12.5 users ...

I just updated all my DM calculators and I have found that it is more easy to update them if I add the halfduplex option.
Also, some of them need multiple resets before going into the update logic.

sudo lpc21isp -control -controlinv -halfduplex -hex DMXX_V23.hex /dev/tty.SLAB_USBtoUART 115200 12000

Sylvain
[DM1x/DM1xL/DM41/DM41L/DM42]

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