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It turned out that my PC has an dysfunctional internal USB hub. Several ports are down.

After a few Days working with Another Product/uP my J-link no longer works. My PC says the device can not be recognized and the J-link LEd starts flashing rapidly after a few seconds when connecting it to the USB Cable. I tried several different USB ports but no progress. In the properties dialog for the J-link the error message is: "This unit cannot start. (Code 10)" Can I remedy this myself somehow?

Hello, Is it possible to make j-link explicitly leave certain (flash) areas untouched on monitor load? The target is a STM32L100R8 with EEPROM at 0x08080000 and 2KB in length. The reason I'm asking is that stored data in the EEPROM area are reinitialized to zero every time a new debug session is started and I want to retain config information stored in this area. brg /Thom

SOLVED! I got the answer from Atollic support.

Hello, I'm having trouble Reading out the written contents of the STM32L100RC EEPROM memory region. I've searched for threads regarding this and found some helpful hints. Turning off the J-link cache in the Control panel does the trick but there are also mention about a monitor command that enables you to mask out a specific memory region (like the EEPROM part of the STM32L100) that the J-link will not cache. I can't seem to find it in any documentation... Has this command been implemented yet? …

Well it works for now. Thanks for the info! /Thom

Hello all, I own a J-Link and use it together with the Atollic True Studio 4.2.0 and the downloaded segger software suite v4.78f (the latest). I have a 32L100CDISCOVERY board which equipped with the STM32L100RCT6. I’ve created a small project that compiles just fine. When I try to run I get a "Device selection" dialog that informs me that STM32L100RC is unknown and will not continue. I also examined the device settings in the standalone GDB server where I can see that these devices are included …