I'm trying to program a custom SAMD51G18A board over SWD using a Segger J-link EDU Mini. In Atmel Studio 7 > Tools > Device Programming I keep getting this error message: Timed out in cmd Device:startSessionUnable to enter programming mode. Verify device selection,interface settings, target power, security bit, and connections to the target device. Using J-Link Commander gives me the following:"Mass erase done" repeats until I quit the program. forum.segger.com/index.php/Attachment/3593/ My sche…