Mbed usb serial port stops sending when mass storage driver starts

Mbed OS
1

I have recently come back to my mbed LPC1768 after several years to update an old project. Previously I used win 7 and with the serial driver, usb serial worked fine.

My current PC is running windows 11 and to start with I had no serial ports listed in device manager, then I updated my mbed with the firmware to https://assets.mbed.com/firmwares/lpc1768/mbedMicrocontroller_221130.if (is there a newer fw ?).

However USB serial only works correctly for a few seconds until the MBED mass storage device starts up and the window pops up showing the files.

Once the window opens serial mbed->PC stops working, but serial PC->mbed continues to work.

Any suggestions?

Thanks,
Mark Leman

2

Hello,

New beta firmware for LPC1768 - Keil Studio - Arm Mbed OS support forum

BR, Jan

1 Like
3

Hi, thanks for the reply.

That link is were I found the firmware :-), and I also saw the last comment about the windows serial driver version.
My driver version is 10.0.22000.1098 dated 21/6/2006.
So I am still puzzled about what I have wrong?

Regards,
Mark Leman

4

Personally I have had good luck using the “old” firmware (the one from here). You may have to install the driver from that page to get the serial port to show up tho.

1 Like
5

Thanks for the reply, unfortunately the link to the serial driver on that page does not work any more :frowning:

Regards,
Mark Leman

6

Ah that’s a classic Google Chrome issue, because it’s a link to an http download from an https page. If you copy the link for the download and paste it into the URL bar on a new tab, it will work!

1 Like
7

You couldn’t make that up if you tried :joy:

As you suggested, the link here Windows serial driver - Program setup | Mbed OS 6 Documentation needs to be changed to https://os.mbed.com/media/downloads/drivers/mbedWinSerial_16466.exe :open_mouth: then it downloaded and works (so far!)

edit Worse I can’t even click on the link I have posted above, don’t know if that’s also a chrome issue, but cutting and pasting the link does work

Real shame the newest firmware do not work correctly, the convenience of windows update automatically providing the driver would have been nice.

Regards,
Mark Leman