In STM32 using USB1 as an interface, when I flash the FUS version and BLE stack for the first time it is able to flash, but when I repeat the same steps then am not able to read the FUS version. Can anyone help me with this issue?

[Mkuma.7]

The steps performed:

1. First read the FUS version.
2. Selected the FUS bin file to flash.
3. Flashed the above-mentioned file.
4. Then again when I read the FUS version it was displaying as 00000000 in GUI

[Mkuma.7]

As per STEP 4, the FUS version should have been read irrespective of anything, but when I erased the chip completely am not able to read the FUS version via USB.

[Mkuma.7]

Can anyone help me with the above-discussed ones?

[Mkuma.7]

Right now the chip has been erased completely.

Do you know how to enable the cortex M0+ before reading the FUS version via USB?

[Mkuma.7]

Or In other way of asking, Is there any way to start FUS without making the nswboot0 = 0 via USB?

[Remy ISSALYS]

Hello,

I tried to reproduce your issue, but I don't see it.

1. Connect to STM32CubeProgrammer through USB
2. Read FUS => v1.2.0.0
3. Firmware Upgrade with FUS fw v1.2.0.0
4. Reconnect through USB
5. Read FUS => v1.2.0.0

I'm using STM32CubeProgrammer v1.13.0.

Best Regards