stm32 - SPI Transfer with STM32F4 board gets stuck on SPI_WaitTX

I am new to the whole embedded hardware thing, and I am getting stuck when trying to connect my STM32F4 Discovery board to a Bosch BMX_055 IMU unit.

Here is a snippet of the code I am trying to run:

bool testConnection() {
    SPI_ResetCS(&IMUSpi);

    SPI_Transfer8(&IMUSpi, 0x0);
    int chipId = SPI_Transfer8(&IMUSpi, 0x0);
    printf("Chip Id: %d\n", chipId);
    SPI_SetCS(&IMUSpi);
    return true;
}

My code then gets hung up in here:

inline uint8_t SPI_Transfer8(Spi* spi, uint8_t value) {
    *(uint8_t *)(&spi->spiPeriph->DR) = value;

    SPI_WaitTX(spi->spiPeriph);
    SPI_WaitRX(spi->spiPeriph);
    //SPI_WaitBSY(spi->spiPeriph);
    return *(uint8_t *)(&spi->spiPeriph->DR);
}

on the SPI_WaitTX function.

Any ideas on why it is stuck/how to fix it would be greatly appreciated!