Hi, Just upgraded the Keil 5.10 to 5.11 to have STM32L0 support.
When trying to debug my application I get: "st-link usb communication error" and debug fails.
I have no problem connecting to my board using ST-Link Utility.
The 5.10 works fine - no issues with connecting to the ST-link.
I use the latest ST-link drivers and firmware (STLinkUSBDriver.dll v4.3.3.0, ST-LINK Firmware version : V2J21M5)
Bogdan
Hi, i have 32F429I Discovery kit and when i upgrade from V2.J20.S0 to V2.J21.S0 it stop working and message "USB communication error" when trying to load in uVision always shows up. Downgrading to J20 helps! (Just run the STlinkupgrade in the directory in previous post) Thanks guys!
Hi All, I am encountered the same problem above and with the old Firmware on ST-Link it works.So I downgrade it.