STM32F401RE: undefined reference to `HAL_SPI_Init'
Posted on February 18, 2016 at 23:59 Hello, I try to initialize my SPI3 on the STM32F401RE Nucleo Board. But as soon as I call my Init_SPIMaster(); in the main, I get the error message, that there is an undefined reference to HAL_SPI_Init. T...