ST STM32F31xx - Page 417

UM1581
Serial peripheral interface (SPI)
DocID023800 Rev 1
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20.2.7.14 SPI_SSOutputCmd
Function Name
void SPI_SSOutputCmd ( SPI_TypeDef * SPIx,
FunctionalState NewState)
Function Description
Enables or disables the SS output for the selected SPI.
Parameters
 SPIx : where x can be 1, 2 or 3 to select the SPI peripheral.
 NewState : new state of the SPIx SS output. This parameter
can be: ENABLE or DISABLE.
Return values
 None.
Notes
 This function can be called only after the SPI_Init() function
has been called and the NSS hardware management mode is
selected.
20.2.7.15 SPI_NSSPulseModeCmd
Function Name
void SPI_NSSPulseModeCmd ( SPI_TypeDef * SPIx,
FunctionalState NewState)
Function Description
Enables or disables the NSS pulse management mode.
Parameters
 SPIx : where x can be 1, 2 or 3 to select the SPI peripheral.
 NewState : new state of the NSS pulse management mode.
This parameter can be: ENABLE or DISABLE.
Return values
 None.
Notes
 This function can be called only after the SPI_Init() function
has been called.
 When TI mode is selected, the control bits NSSP is not taken
into consideration and are configured by hardware
respectively to the TI mode requirements.