Bug when connecting the USB cable
Posted: Fri Jun 15, 2018 3:31 pm
Hi,
I just received my DM42 and its a really nice device. There is an issue with the USB cable though:

Transcript (for making search easier in this forum, and for posterity if imgur closes):
This happens directly at the moment I plug the USB cable in the device, tested both on different computers (windows and linux) and with different USB cables. When this error appears, the calculator is then stuck. The only way out is to remove the USB cable and press the reset button on the back.
Here are a few notes:
I just received my DM42 and its a really nice device. There is an issue with the USB cable though:

Transcript (for making search easier in this forum, and for posterity if imgur closes):
Code: Select all
Err:Src/main.c:867
Err:main.c:867
Err:SetFreq 2
ERROR: 0777
Desc:SetFreq 2
Here are a few notes:
- This also happen when I do "Activate USB disk" before plugging the cable in.
- If I put it in while on the "About" screen after reset, it doesn't throw an error directly, but after dismissing the screen get stuck on "Checking QSPI contents …"
- I manage, sometimes, to make USB work with this procedure:
- Press the reset button and wait for the "About" screen to appear
- Prepare the USB cable close to the plug
- Dismiss the about screen by pressing "Exit" and quickly insert the USB cable
- Some other messages I got while trying to make it work:
Code: Select all
Oops, RESET in protected area. Please, report following info if the system had hung: Reg Id d3770001, fw 3.7
Code: Select all
Oops, I've crashed! Please, try to reproduce it, then report the steps taken and following info: Hard Fault r0=10005a0c r1=00000040 r2=00000000 r3=00000000 r12=00000001 lr=ffffffed pc=00f00000 psr=00010029
- Device:
Code: Select all
SN 00874
