Resolved! Error in Nucleo-U031R8 SCK Connection
I fear there is an error in the new Nucleo-U031R8 board. The D13 pin is labeled as the SPI1 SCK pin on the boards' silkscreen. However, the board schematic shows that this is connected to PA5. STM32CubeMX reports pin PA1 as the actual SPI1 SCK pin.So...
