EC200U flashing error

prash · February 23, 2022, 2:04pm

I’m very new to the EC200U eval board. These are the steps I followed:

Boot into Windows
Supply power to the EC200U eval board via the USB cable.
Connect the USB-to-Serial cable (appears as COM5)
4, Push the PWRKEY pin for a second and wait until the blue LED starts flashing.
Start QFlash in admin mode, select the relevant *merge.pac
Press the Start button on QFlash.

I get the following uninformative error message (screenshot). Please advise on what to do next.

prash · February 23, 2022, 2:12pm

After waiting for a while, the status info in QFlash changes to “[COM0]Download fail[Open port fail]!” which is very strange because I don’t even have a COM0 on my computer. All the available COM ports are shown in the device manager screenshot.

Boris_Borisov · June 23, 2022, 6:49am

Exactly the same problem! What could be the reason?

prash · June 23, 2022, 8:04am

I tried on a different computer, and it worked flawlessly. I borrowed an old laptop from the office for flashing, and gave up on trying to solve the problem on my main dev machine.