AN2776 datasheet(12/20 Pages) STMICROELECTRONICS

12 / 20 page

FWLib V1.0 to V2.0 migration steps

AN2776

12/20

Common functions and configuration parameters for SPI and I2S

Some SPI driver functions were updated to support the I2S protocol:

“I2S” was added in the function name to indicate that it can be used for SPI and I2S

“I2S” was added in the configuration parameter to indicate that it can be used for SPI

and I2S

The function format is updated as follows:

SPI_

I2S_FunctionName(SPIx, param1, param2,...)

e.g.: SPI_

I2S_ITConfig(SPI_TypeDef* SPIx, u8 SPI_I2S_IT, FunctionalState NewState)

Table 3 provides the list of the impacted functions.

If you are using any function listed in the first column of Table 3, update the prototypes and

parameter name to the new names given in the second column of the table.

Example: Typical code for SPI interrupt and DMA configuration based on FWLib V1.0:

SPI_ITConfig(SPI2, SPI_IT_TXE, ENABLE)

SPI_DMACmd(SPI2, SPI_DMAReq_Rx, ENABLE)

Using FWLib V2.0, this code becomes:

SPI_I2S_ITConfig

(SPI2, SPI_I2S_IT_TXE, ENABLE)

SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE)

Note:

In addition to these functions, a new structure is added to this driver to configure only the I2S

peripheral.

SPI-specific functions

The functions not listed in Table 3 where not modified and are specific to the SPI protocol.

New functions for I2S

Three functions were added to cover I2S protocol-specific configuration:

I2S_Init(SPI_TypeDef* SPIx, I2S_InitTypeDef* I2S_InitStruct)

I2S_StructInit(I2S_InitTypeDef* I2S_InitStruct)

I2S_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState)

Table 3.

Common functions for SPI and I2S(1)

FWLib V1.0

FWLib V2.0

SPI_DeInit

(SPI_TypeDef* SPIx)

SPI_I2S_DeInit

(SPI_TypeDef* SPIx)

SPI_ITConfig

(SPI_TypeDef* SPIx, u8 SPI_IT,

FunctionalState NewState)

SPI_I2S_ITConfig

(SPI_TypeDef* SPIx, u8 SPI_I2S_IT,

FunctionalState NewState)

SPI_DMACmd

(SPI_TypeDef* SPIx, u16 SPI_DMAReq,

FunctionalState NewState)

SPI_I2S_DMACmd

(SPI_TypeDef* SPIx, u16 SPI_I2S_DMAReq,

FunctionalState NewState)

SPI_SendData

(SPI_TypeDef* SPIx, u16 Data)

SPI_I2S_SendData

(SPI_TypeDef* SPIx, u16 Data)

SPI_ReceiveData

(SPI_TypeDef* SPIx)

SPI_I2S_ReceiveData

(SPI_TypeDef* SPIx)

SPI_GetFlagStatus

(SPI_TypeDef* SPIx, u16 SPI_FLAG)

SPI_I2S_GetFlagStatus

(SPI_TypeDef* SPIx, u16 SPI_I2S_FLAG)

SPI_ClearFlag

(SPI_TypeDef* SPIx, u16 SPI_FLAG)

SPI_I2S_ClearFlag

(SPI_TypeDef* SPIx, u16 SPI_I2S_FLAG)

SPI_GetITStatus

(SPI_TypeDef* SPIx, u8 SPI_IT)

SPI_I2S_GetITStatus

(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)

SPI_ClearITPendingBit

(SPI_TypeDef* SPIx, u8 SPI_IT)

SPI_I2S_ClearITPendingBit

(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)

Some parameters are specific for SPI (e.g.: SPI_FLAG_CRCERR) or I2S (e.g.: I2S_FLAG_CHSIDE).

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