/* Set or Clear the internal software SSI bit of the specified SPI port.  */
void SPISSIConfig(unsigned long ulBase, unsigned long ulSSI)
/* Set or Clear the internal software SSI bit of the specified SPI port.  */
void SPISSIConfig(unsigned long ulBase, unsigned long ulSSI)
{
    xASSERT((ulBase == SPI3_BASE) || (ulBase == SPI1_BASE)||
            (ulBase == SPI2_BASE));
    xASSERT((ulSlaveSel == SPI_SS0));
    xHWREG(ulBase + SPI_CR1) &= ~SPI_CR1_SSI;
    xHWREG(ulBase + SPI_CR1) |= ulSSI;
}