Description

Serial Peripheral Interface Driver.

The spidrv.c and spidrv.h source files for the SPI driver library are in the emdrv/spidrv folder.

Introduction

The SPI driver supports the SPI capabilities of EFM32/EZR32/EFR32 USARTs. The driver is fully reentrant, supports several driver instances, and does not buffer or queue data. Both synchronous and asynchronous transfer functions are included for both master and slave SPI mode. Synchronous transfer functions are blocking and do not return before the transfer is complete. Asynchronous transfer functions report transfer completion with callback functions. Transfers are handled using DMA.

Note: Transfer completion callback functions are called from within the DMA interrupt handler with interrupts disabled.

Configuration Options

Some properties of the SPIDRV driver are compile-time configurable. These properties are stored in a file named spidrv_config.h. A template for this file, containing default values, is in the emdrv/config folder. Currently the configuration options are as follows:

Inclusion of slave API transfer functions.

To configure SPIDRV, provide a custom configuration file. This is a sample spidrv_config.h file:

#ifndef __SILICON_LABS_SPIDRV_CONFIG_H__
#define __SILICON_LABS_SPIDRV_CONFIG_H__

// SPIDRV configuration option. Use this define to include the
// slave part of the SPIDRV API.
#define EMDRV_SPIDRV_INCLUDE_SLAVE

#endif

The properties of each SPI driver instance are set at run-time using the SPIDRV_Init data structure input parameter to the SPIDRV_Init() function.

The API

This section contains brief descriptions of the API functions. For detailed information on input and output parameters and return values, click on the hyperlinked function names. Most functions return an error code, ECODE_EMDRV_SPIDRV_OK is returned on success, see ecode.h and spidrv.h for other error codes.

The application code must include spidrv.h .

SPIDRV_Init() , SPIDRV_DeInit()
These functions initialize or deinitializes the SPIDRV driver. Typically, SPIDRV_Init() is called once in the startup code.

SPIDRV_GetTransferStatus()
Query the status of a transfer. Reports number of items (frames) transmitted and remaining.

SPIDRV_AbortTransfer()
Stop an ongoing transfer.

SPIDRV_SetBitrate() , SPIDRV_GetBitrate()
Set or query the SPI bus bitrate.

SPIDRV_SetFramelength() , SPIDRV_GetFramelength()
Set or query SPI the bus frame length.

SPIDRV_MReceive() , SPIDRV_MReceiveB()
SPIDRV_MTransfer() , SPIDRV_MTransferB() , SPIDRV_MTransferSingleItemB()
SPIDRV_MTransmit() , SPIDRV_MTransmitB()
SPIDRV_SReceive() , SPIDRV_SReceiveB()
SPIDRV_STransfer() , SPIDRV_STransferB()
SPIDRV_STransmit() , SPIDRV_STransmitB()
SPI transfer functions for SPI masters have an uppercase M in their name, the slave counterparts have an S.

As previously mentioned, transfer functions are synchronous and asynchronous. The synchronous versions have an uppercase B (for Blocking) at the end of their function name.

Transmit functions discard received data, receive functions transmit a fixed data pattern set when the driver is initialized ( SPIDRV_Init::dummyTxValue ). Transfer functions both receive and transmit data.

All slave transfer functions have a millisecond timeout parameter. Use 0 for no (infinite) timeout.

Example

#include "spidrv.h"

SPIDRV_HandleData_t handleData;
SPIDRV_Handle_t handle = &handleData;

void TransferComplete(SPIDRV_Handle_t handle,
                      Ecode_t transferStatus,
                      int itemsTransferred)
{
  if (transferStatus == ECODE_EMDRV_SPIDRV_OK) {
   // Success !
  }
}

int main(void)
{
  uint8_t buffer[10];
  SPIDRV_Init_t initData = SPIDRV_MASTER_USART2;

  // Initialize an SPI driver instance.
  SPIDRV_Init(handle, &initData);

  // Transmit data using a blocking transmit function.
  SPIDRV_MTransmitB(handle, buffer, 10);

  // Transmit data using a callback to catch transfer completion.
  SPIDRV_MTransmit(handle, buffer, 10, TransferComplete);
}

Modules
Error Codes

Init Configuration Data

Data Structures
struct	SPIDRV_Init
	An SPI driver instance initialization structure.

struct	SPIDRV_HandleData
	An SPI driver instance handle data structure.

Functions
Ecode_t	SPIDRV_AbortTransfer ( SPIDRV_Handle_t handle)
	Abort an ongoing SPI transfer.

Ecode_t	SPIDRV_DeInit ( SPIDRV_Handle_t handle)
	Deinitialize an SPI driver instance.

Ecode_t	SPIDRV_GetBitrate ( SPIDRV_Handle_t handle, uint32_t *bitRate)
	Get current SPI bus bitrate.

Ecode_t	SPIDRV_GetFramelength ( SPIDRV_Handle_t handle, uint32_t *frameLength)
	Get current SPI framelength.

Ecode_t	SPIDRV_GetTransferStatus ( SPIDRV_Handle_t handle, int itemsTransferred, int itemsRemaining)
	Get the status of an SPI transfer.

Ecode_t	SPIDRV_Init ( SPIDRV_Handle_t handle, SPIDRV_Init_t *initData)
	Initialize an SPI driver instance.

Ecode_t	SPIDRV_MReceive ( SPIDRV_Handle_t handle, void *buffer, int count, SPIDRV_Callback_t callback)
	Start an SPI master receive transfer.

Ecode_t	SPIDRV_MReceiveB ( SPIDRV_Handle_t handle, void *buffer, int count)
	Start an SPI master blocking receive transfer.

Ecode_t	SPIDRV_MTransfer ( SPIDRV_Handle_t handle, const void txBuffer, void rxBuffer, int count, SPIDRV_Callback_t callback)
	Start an SPI master transfer.

Ecode_t	SPIDRV_MTransferB ( SPIDRV_Handle_t handle, const void txBuffer, void rxBuffer, int count)
	Start an SPI master blocking transfer.

Ecode_t	SPIDRV_MTransferSingleItemB ( SPIDRV_Handle_t handle, uint32_t txValue, void *rxValue)
	Start an SPI master blocking single item (frame) transfer.

Ecode_t	SPIDRV_MTransmit ( SPIDRV_Handle_t handle, const void *buffer, int count, SPIDRV_Callback_t callback)
	Start an SPI master transmit transfer.

Ecode_t	SPIDRV_MTransmitB ( SPIDRV_Handle_t handle, const void *buffer, int count)
	Start an SPI master blocking transmit transfer.

Ecode_t	SPIDRV_SetBitrate ( SPIDRV_Handle_t handle, uint32_t bitRate)
	Set SPI bus bitrate.

Ecode_t	SPIDRV_SetFramelength ( SPIDRV_Handle_t handle, uint32_t frameLength)
	Set SPI framelength.

Ecode_t	SPIDRV_SReceive ( SPIDRV_Handle_t handle, void *buffer, int count, SPIDRV_Callback_t callback, int timeoutMs)
	Start an SPI slave receive transfer.

Ecode_t	SPIDRV_SReceiveB ( SPIDRV_Handle_t handle, void *buffer, int count, int timeoutMs)
	Start an SPI slave blocking receive transfer.

Ecode_t	SPIDRV_STransfer ( SPIDRV_Handle_t handle, const void txBuffer, void rxBuffer, int count, SPIDRV_Callback_t callback, int timeoutMs)
	Start an SPI slave transfer.

Ecode_t	SPIDRV_STransferB ( SPIDRV_Handle_t handle, const void txBuffer, void rxBuffer, int count, int timeoutMs)
	Start an SPI slave blocking transfer.

Ecode_t	SPIDRV_STransmit ( SPIDRV_Handle_t handle, const void *buffer, int count, SPIDRV_Callback_t callback, int timeoutMs)
	Start an SPI slave transmit transfer.

Ecode_t	SPIDRV_STransmitB ( SPIDRV_Handle_t handle, const void *buffer, int count, int timeoutMs)
	Start an SPI slave blocking transmit transfer.

Typedefs
typedef void(*	SPIDRV_Callback_t ) (struct SPIDRV_HandleData *handle, Ecode_t transferStatus, int itemsTransferred)
	SPIDRV transfer completion callback function.

typedef SPIDRV_HandleData_t *	SPIDRV_Handle_t
	An SPI driver instance handle.

Enumerations
enum	SPIDRV_Type { spidrvMaster = 0, spidrvSlave = 1 }
	SPI driver instance type.

enum	SPIDRV_BitOrder { spidrvBitOrderLsbFirst = 0, spidrvBitOrderMsbFirst = 1 }
	SPI bus bit order.

enum	SPIDRV_ClockMode { spidrvClockMode0 = 0, spidrvClockMode1 = 1, spidrvClockMode2 = 2, spidrvClockMode3 = 3 }
	SPI clock mode (clock polarity and phase).

enum	SPIDRV_CsControl { spidrvCsControlAuto = 0, spidrvCsControlApplication = 1 }
	SPI master chip select (CS) control scheme.

enum	SPIDRV_SlaveStart { spidrvSlaveStartImmediate = 0, spidrvSlaveStartDelayed = 1 }
	SPI slave transfer start scheme.

Function Documentation

◆ SPIDRV_AbortTransfer()

Ecode_t SPIDRV_AbortTransfer ( SPIDRV_Handle_t handle )

Abort an ongoing SPI transfer.

Parameters

[in] handle Pointer to an SPI driver handle.

Returns: ECODE_EMDRV_SPIDRV_OK on success, ECODE_EMDRV_SPIDRV_IDLE if SPI is idle. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_DeInit()

Ecode_t SPIDRV_DeInit ( SPIDRV_Handle_t handle )

Deinitialize an SPI driver instance.

Parameters

[in] handle Pointer to an SPI driver handle.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_GetBitrate()

Ecode_t SPIDRV_GetBitrate	(	SPIDRV_Handle_t	`handle,`
		uint32_t *	`bitRate`
	)

Get current SPI bus bitrate.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`bitRate`	Current SPI bus bitrate.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_GetFramelength()

Ecode_t SPIDRV_GetFramelength	(	SPIDRV_Handle_t	`handle,`
		uint32_t *	`frameLength`
	)

Get current SPI framelength.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`frameLength`	Current SPI bus framelength.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_GetTransferStatus()

Ecode_t SPIDRV_GetTransferStatus	(	SPIDRV_Handle_t	`handle,`
		int *	`itemsTransferred,`
		int *	`itemsRemaining`
	)

Get the status of an SPI transfer.

Returns status of an ongoing transfer. If no transfer is in progress, the status of the last transfer is reported.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`itemsTransferred`	Number of items (frames) transferred.
[out]	`itemsRemaining`	Number of items (frames) remaining.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_Init()

Ecode_t SPIDRV_Init	(	SPIDRV_Handle_t	`handle,`
		SPIDRV_Init_t *	`initData`
	)

Initialize an SPI driver instance.

Parameters

[out]	`handle`	Pointer to an SPI driver handle; refer to SPIDRV_Handle_t .
[in]	`initData`	Pointer to an initialization data structure; refer to SPIDRV_Init .

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MReceive()

Ecode_t SPIDRV_MReceive	(	SPIDRV_Handle_t	`handle,`
		void *	`buffer,`
		int	`count,`
		SPIDRV_Callback_t	`callback`
	)

Start an SPI master receive transfer.

Note: The MOSI wire will transmit SPIDRV_Init::dummyTxValue .

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`buffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`callback`	Transfer completion callback.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MReceiveB()

Ecode_t SPIDRV_MReceiveB	(	SPIDRV_Handle_t	`handle,`
		void *	`buffer,`
		int	`count`
	)

Start an SPI master blocking receive transfer.

Note: The MOSI wire will transmit SPIDRV_Init::dummyTxValue .
This function is blocking and returns when the transfer is complete or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`buffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.

Returns: ECODE_EMDRV_SPIDRV_OK on success or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MTransfer()

Ecode_t SPIDRV_MTransfer	(	SPIDRV_Handle_t	`handle,`
		const void *	`txBuffer,`
		void *	`rxBuffer,`
		int	`count,`
		SPIDRV_Callback_t	`callback`
	)

Start an SPI master transfer.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`txBuffer`	Transmit data buffer.
[out]	`rxBuffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`callback`	Transfer completion callback.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MTransferB()

Ecode_t SPIDRV_MTransferB	(	SPIDRV_Handle_t	`handle,`
		const void *	`txBuffer,`
		void *	`rxBuffer,`
		int	`count`
	)

Start an SPI master blocking transfer.

Note: This function is blocking and returns when the transfer is complete or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`txBuffer`	Transmit data buffer.
[out]	`rxBuffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.

Returns: ECODE_EMDRV_SPIDRV_OK on success or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MTransferSingleItemB()

Ecode_t SPIDRV_MTransferSingleItemB	(	SPIDRV_Handle_t	`handle,`
		uint32_t	`txValue,`
		void *	`rxValue`
	)

Start an SPI master blocking single item (frame) transfer.

Note: This function is blocking and returns when the transfer is complete or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`txValue`	Value to transmit.
[out]	`rxValue`	Value received.

Returns: ECODE_EMDRV_SPIDRV_OK on success or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MTransmit()

Ecode_t SPIDRV_MTransmit	(	SPIDRV_Handle_t	`handle,`
		const void *	`buffer,`
		int	`count,`
		SPIDRV_Callback_t	`callback`
	)

Start an SPI master transmit transfer.

Note: The data received on the MISO wire is discarded.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`buffer`	Transmit data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`callback`	Transfer completion callback.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_MTransmitB()

Ecode_t SPIDRV_MTransmitB	(	SPIDRV_Handle_t	`handle,`
		const void *	`buffer,`
		int	`count`
	)

Start an SPI master blocking transmit transfer.

Note: The data received on the MISO wire is discarded.
This function is blocking and returns when the transfer is complete.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`buffer`	Transmit data buffer.
[in]	`count`	Number of bytes in transfer.

Returns: ECODE_EMDRV_SPIDRV_OK on success or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_SetBitrate()

Ecode_t SPIDRV_SetBitrate	(	SPIDRV_Handle_t	`handle,`
		uint32_t	`bitRate`
	)

Set SPI bus bitrate.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`bitRate`	New SPI bus bitrate.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_SetFramelength()

Ecode_t SPIDRV_SetFramelength	(	SPIDRV_Handle_t	`handle,`
		uint32_t	`frameLength`
	)

Set SPI framelength.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`frameLength`	New SPI bus framelength.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_SReceive()

Ecode_t SPIDRV_SReceive	(	SPIDRV_Handle_t	`handle,`
		void *	`buffer,`
		int	`count,`
		SPIDRV_Callback_t	`callback,`
		int	`timeoutMs`
	)

Start an SPI slave receive transfer.

Note: The MISO wire will transmit SPIDRV_Init::dummyTxValue .

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`buffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`callback`	Transfer completion callback.
[in]	`timeoutMs`	Transfer timeout in milliseconds.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_SReceiveB()

Ecode_t SPIDRV_SReceiveB	(	SPIDRV_Handle_t	`handle,`
		void *	`buffer,`
		int	`count,`
		int	`timeoutMs`
	)

Start an SPI slave blocking receive transfer.

Note: The MISO wire will transmit SPIDRV_Init::dummyTxValue .
This function is blocking and returns when the transfer is complete, on timeout, or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[out]	`buffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`timeoutMs`	Transfer timeout in milliseconds.

Returns: ECODE_EMDRV_SPIDRV_OK on success, ECODE_EMDRV_SPIDRV_TIMEOUT on timeout or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_STransfer()

Ecode_t SPIDRV_STransfer	(	SPIDRV_Handle_t	`handle,`
		const void *	`txBuffer,`
		void *	`rxBuffer,`
		int	`count,`
		SPIDRV_Callback_t	`callback,`
		int	`timeoutMs`
	)

Start an SPI slave transfer.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`txBuffer`	Transmit data buffer.
[out]	`rxBuffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`callback`	Transfer completion callback.
[in]	`timeoutMs`	Transfer timeout in milliseconds.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_STransferB()

Ecode_t SPIDRV_STransferB	(	SPIDRV_Handle_t	`handle,`
		const void *	`txBuffer,`
		void *	`rxBuffer,`
		int	`count,`
		int	`timeoutMs`
	)

Start an SPI slave blocking transfer.

Note: This function is blocking and returns when the transfer is complete, on timeout, or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`txBuffer`	Transmit data buffer.
[out]	`rxBuffer`	Receive data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`timeoutMs`	Transfer timeout in milliseconds.

Returns: ECODE_EMDRV_SPIDRV_OK on success, ECODE_EMDRV_SPIDRV_TIMEOUT on timeout or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_STransmit()

Ecode_t SPIDRV_STransmit	(	SPIDRV_Handle_t	`handle,`
		const void *	`buffer,`
		int	`count,`
		SPIDRV_Callback_t	`callback,`
		int	`timeoutMs`
	)

Start an SPI slave transmit transfer.

Note: The data received on the MOSI wire is discarded.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`buffer`	Transmit data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`callback`	Transfer completion callback.
[in]	`timeoutMs`	Transfer timeout in milliseconds.

Returns: ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

◆ SPIDRV_STransmitB()

Ecode_t SPIDRV_STransmitB	(	SPIDRV_Handle_t	`handle,`
		const void *	`buffer,`
		int	`count,`
		int	`timeoutMs`
	)

Start an SPI slave blocking transmit transfer.

Note: The data received on the MOSI wire is discarded.
This function is blocking and returns when the transfer is complete, on timeout, or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	`handle`	Pointer to an SPI driver handle.
[in]	`buffer`	Transmit data buffer.
[in]	`count`	Number of bytes in transfer.
[in]	`timeoutMs`	Transfer timeout in milliseconds.

Returns: ECODE_EMDRV_SPIDRV_OK on success, ECODE_EMDRV_SPIDRV_TIMEOUT on timeout or ECODE_EMDRV_SPIDRV_ABORTED if SPIDRV_AbortTransfer() has been called. On failure, an appropriate SPIDRV Ecode_t is returned.

Typedef Documentation

◆ SPIDRV_Callback_t

typedef void(* SPIDRV_Callback_t) (struct SPIDRV_HandleData *handle, Ecode_t transferStatus, int itemsTransferred)

SPIDRV transfer completion callback function.

Called when a transfer is complete. An application should check the transferStatus and itemsTransferred values.

Parameters

[in]	`handle`	The SPIDRV device handle used to start the transfer.
[in]	`transferStatus`	A number of bytes actually transferred.
[in]	`itemsTransferred`	A number of bytes transferred.

Returns: ECODE_EMDRV_SPIDRV_OK on success, ECODE_EMDRV_SPIDRV_TIMEOUT on timeout. Timeouts are only relevant for slave mode transfers.

◆ SPIDRV_Handle_t

typedef SPIDRV_HandleData_t* SPIDRV_Handle_t

An SPI driver instance handle.

Enumeration Type Documentation

◆ SPIDRV_Type

enum SPIDRV_Type

SPI driver instance type.

Enumerator
spidrvMaster	Act as an SPI master.
spidrvSlave	Act as an SPI slave.

◆ SPIDRV_BitOrder

enum SPIDRV_BitOrder

SPI bus bit order.

Enumerator
spidrvBitOrderLsbFirst	LSB bit is transmitted first.
spidrvBitOrderMsbFirst	MSB bit is transmitted first.

◆ SPIDRV_ClockMode

enum SPIDRV_ClockMode

SPI clock mode (clock polarity and phase).

Enumerator
spidrvClockMode0	SPI mode 0: CLKPOL=0, CLKPHA=0.
spidrvClockMode1	SPI mode 1: CLKPOL=0, CLKPHA=1.
spidrvClockMode2	SPI mode 2: CLKPOL=1, CLKPHA=0.
spidrvClockMode3	SPI mode 3: CLKPOL=1, CLKPHA=1.

◆ SPIDRV_CsControl

enum SPIDRV_CsControl

SPI master chip select (CS) control scheme.

Enumerator
spidrvCsControlAuto	CS controlled by the SPI driver.
spidrvCsControlApplication	CS controlled by the application.

◆ SPIDRV_SlaveStart

enum SPIDRV_SlaveStart

SPI slave transfer start scheme.

Enumerator
spidrvSlaveStartImmediate	Transfer starts immediately.
spidrvSlaveStartDelayed	Transfer starts when the bus is idle (CS deasserted).

SPIDRV - SPI Driver

Description

Introduction

Configuration Options

The API

Example

Modules

Data Structures

Functions

Typedefs

Enumerations

Function Documentation

◆ SPIDRV_AbortTransfer()

◆ SPIDRV_DeInit()

◆ SPIDRV_GetBitrate()

◆ SPIDRV_GetFramelength()

◆ SPIDRV_GetTransferStatus()

◆ SPIDRV_Init()

◆ SPIDRV_MReceive()

◆ SPIDRV_MReceiveB()

◆ SPIDRV_MTransfer()

◆ SPIDRV_MTransferB()

◆ SPIDRV_MTransferSingleItemB()

◆ SPIDRV_MTransmit()

◆ SPIDRV_MTransmitB()

◆ SPIDRV_SetBitrate()

◆ SPIDRV_SetFramelength()

◆ SPIDRV_SReceive()

◆ SPIDRV_SReceiveB()

◆ SPIDRV_STransfer()

◆ SPIDRV_STransferB()

◆ SPIDRV_STransmit()

◆ SPIDRV_STransmitB()

Typedef Documentation

◆ SPIDRV_Callback_t

◆ SPIDRV_Handle_t

Enumeration Type Documentation

◆ SPIDRV_Type

◆ SPIDRV_BitOrder

◆ SPIDRV_ClockMode

◆ SPIDRV_CsControl

◆ SPIDRV_SlaveStart