Detailed Description

SPIDRV Serial Peripheral Interface Driver.

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

Introduction

The SPI driver support the SPI capabilities of EFM32/EZR32/EFR32 USARTs. The driver is fully reentrant and several driver instances can coexist. The driver does not buffer or queue data. The driver has SPI transfer functions for both master and slave SPI mode. Both synchronous and asynchronous transfer functions are present. Synchronous transfer functions are blocking and will not return to caller before the transfer has completed. Asynchronous transfer functions report transfer completion with callback functions. Transfers are done 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, resides in the emdrv/config folder. Currently the configuration options are:

Inclusion of slave API transfer functions.

To configure SPIDRV, provide your own configuration file. Here 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 via the SPIDRV_Init_t data structure input parameter to the SPIDRV_Init() function.

The API

This section contain brief descriptions of the functions in the API. You will find detailed information on input and output parameters and return values by clicking 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.

Your application code must include one header file: spidrv.h.

SPIDRV_Init(), SPIDRV_DeInit()
These functions initializes or deinitializes the SPIDRV driver. Typically SPIDRV_Init() is called once in your 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 SPI bus bitrate.

SPIDRV_SetFramelength(), SPIDRV_GetFramelength()
Set or query SPI 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.

Transfer functions come in both synchronous and asynchronous versions, the synchronous versions have an uppercase B (for Blocking) at the end of their function name. Synchronous functions will not return before the transfer has completed. The aynchronous functions signal transfer completion with a callback function.

Transmit functions discards received data, receive functions transmit a fixed data pattern set when the driver is initialized (SPIDRV_Init_t::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 a 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 );
}

Data Structures
struct	SPIDRV_HandleData

struct	SPIDRV_Init

Macros
#define	ECODE_EMDRV_SPIDRV_ABORTED ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000007 )
	SPI transfer has been aborted.

#define	ECODE_EMDRV_SPIDRV_BUSY ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000003 )
	The SPI port is busy.

#define	ECODE_EMDRV_SPIDRV_DMA_ALLOC_ERROR ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000009 )
	Unable to allocated DMA channels.

#define	ECODE_EMDRV_SPIDRV_IDLE ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000006 )
	No SPI transfer in progress.

#define	ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000001 )
	Illegal SPI handle.

#define	ECODE_EMDRV_SPIDRV_MODE_ERROR ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000008 )
	SPI master used slave API or vica versa.

#define	ECODE_EMDRV_SPIDRV_OK ( ECODE_OK )
	Success return value.

#define	ECODE_EMDRV_SPIDRV_PARAM_ERROR ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000002 )
	Illegal input parameter.

#define	ECODE_EMDRV_SPIDRV_TIMEOUT ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000005 )
	SPI transfer timeout.

#define	ECODE_EMDRV_SPIDRV_TIMER_ALLOC_ERROR ( ECODE_EMDRV_SPIDRV_BASE \| 0x00000004 )
	Unable to allocated timeout timer.

#define	SPIDRV_MASTER_USART0
	Configuration data for SPI master using USART0. More...

#define	SPIDRV_MASTER_USART1
	Configuration data for SPI master using USART1. More...

#define	SPIDRV_MASTER_USART2
	Configuration data for SPI master using USART2. More...

#define	SPIDRV_MASTER_USARTRF0
	Configuration data for SPI master using USARTRF0. More...

#define	SPIDRV_MASTER_USARTRF1
	Configuration data for SPI master using USARTRF1. More...

#define	SPIDRV_SLAVE_USART0
	Configuration data for SPI slave using USART0. More...

#define	SPIDRV_SLAVE_USART1
	Configuration data for SPI slave using USART1. More...

#define	SPIDRV_SLAVE_USART2
	Configuration data for SPI slave using USART2. More...

#define	SPIDRV_SLAVE_USARTRF0
	Configuration data for SPI slave using USARTRF0. More...

Typedefs
typedef enum SPIDRV_BitOrder	SPIDRV_BitOrder_t
	SPI bus bit order.

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

typedef enum SPIDRV_ClockMode	SPIDRV_ClockMode_t
	SPI clock mode (clock polarity and phase).

typedef enum SPIDRV_CsControl	SPIDRV_CsControl_t
	SPI master chip select (CS) control scheme.

typedef SPIDRV_HandleData_t *	SPIDRV_Handle_t
	SPI driver instance handle.

typedef struct SPIDRV_HandleData	SPIDRV_HandleData_t

typedef struct SPIDRV_Init	SPIDRV_Init_t

typedef enum SPIDRV_SlaveStart	SPIDRV_SlaveStart_t
	SPI slave transfer start scheme.

typedef enum SPIDRV_Type	SPIDRV_Type_t
	SPI driver instance type.

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

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

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

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

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

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

Ecode_t	SPIDRV_DeInit (SPIDRV_Handle_t handle)
	Deinitialize a SPI driver instance. More...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Macro Definition Documentation

#define SPIDRV_MASTER_USART0

Value:

{                                                                         \
  USART0,                       /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  1000000,                      /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvMaster,                 /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI master using USART0.

Definition at line 421 of file spidrv.h.

#define SPIDRV_MASTER_USART1

Value:

{                                                                         \
  USART1,                       /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  1000000,                      /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvMaster,                 /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI master using USART1.

Definition at line 436 of file spidrv.h.

Referenced by KSZ8851SNL_SPI_Init().

#define SPIDRV_MASTER_USART2

Value:

{                                                                         \
  USART2,                       /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  1000000,                      /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvMaster,                 /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI master using USART2.

Definition at line 452 of file spidrv.h.

#define SPIDRV_MASTER_USARTRF0

Value:

{                                                                         \
  USARTRF0,                     /* USART port                       */    \
  RF_USARTRF_LOCATION,          /* USART pins location number       */    \
  1000000,                      /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvMaster,                 /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI master using USARTRF0.

Definition at line 482 of file spidrv.h.

#define SPIDRV_MASTER_USARTRF1

Value:

{                                                                         \
  USARTRF1,                     /* USART port                       */    \
  RF_USARTRF_LOCATION,          /* USART pins location number       */    \
  1000000,                      /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvMaster,                 /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI master using USARTRF1.

Definition at line 497 of file spidrv.h.

#define SPIDRV_SLAVE_USART0

Value:

{                                                                         \
  USART0,                       /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  0,                            /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvSlave,                  /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI slave using USART0.

Definition at line 512 of file spidrv.h.

#define SPIDRV_SLAVE_USART1

Value:

{                                                                         \
  USART1,                       /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  0,                            /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvSlave,                  /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI slave using USART1.

Definition at line 527 of file spidrv.h.

#define SPIDRV_SLAVE_USART2

Value:

{                                                                         \
  USART2,                       /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  0,                            /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvSlave,                  /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI slave using USART2.

Definition at line 543 of file spidrv.h.

#define SPIDRV_SLAVE_USARTRF0

Value:

{                                                                         \
  USARTRF0,                     /* USART port                       */    \
  _USART_ROUTE_LOCATION_LOC1,   /* USART pins location number       */    \
  0,                            /* Bitrate                          */    \
  8,                            /* Frame length                     */    \
  0,                            /* Dummy tx value for rx only funcs */    \
  spidrvSlave,                  /* SPI mode                         */    \
  spidrvBitOrderMsbFirst,       /* Bit order on bus                 */    \
  spidrvClockMode0,             /* SPI clock/phase mode             */    \
  spidrvCsControlAuto,          /* CS controlled by the driver      */    \
  spidrvSlaveStartImmediate     /* Slave start transfers immediately*/    \
}

Configuration data for SPI slave using USARTRF0.

Definition at line 573 of file spidrv.h.

Typedef Documentation

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

SPIDRV transfer completion callback function.

The callback function is called when a transfer has completed. An application should check the transferStatus and itemsTransferred values.

Parameters

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

Definition at line 114 of file spidrv.h.

typedef struct SPIDRV_HandleData SPIDRV_HandleData_t

SPI driver instance handle data structure. The handle is allocated by the application using SPIDRV. There may be several concurrent driver instances in an application. The application is not supposed to neither write nor read the contents of the handle.

typedef struct SPIDRV_Init SPIDRV_Init_t

SPI driver instance initialization structure. This data structure contains a number of SPIDRV configuration options. This struct is passed to SPIDRV_Init() when initializing a SPIDRV instance. Some common initialization data sets are predefined in SPIDRV_MASTER_USART0 and friends.

Enumeration Type Documentation

enum SPIDRV_BitOrder

SPI bus bit order.

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

Definition at line 62 of file spidrv.h.

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.

Definition at line 69 of file spidrv.h.

enum SPIDRV_CsControl

SPI master chip select (CS) control scheme.

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

Definition at line 78 of file spidrv.h.

enum SPIDRV_SlaveStart

SPI slave transfer start scheme.

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

Definition at line 85 of file spidrv.h.

enum SPIDRV_Type

SPI driver instance type.

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

Definition at line 55 of file spidrv.h.

Function Documentation

Ecode_t SPIDRV_AbortTransfer ( SPIDRV_Handle_t handle )

Abort an ongoing SPI transfer.

Parameters

[in] handle Pointer to a 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.

Definition at line 388 of file spidrv.c.

References CORE_DECLARE_IRQ_STATE, CORE_ENTER_ATOMIC, CORE_EXIT_ATOMIC, DMADRV_StopTransfer(), DMADRV_TransferRemainingCount(), ECODE_EMDRV_SPIDRV_ABORTED, ECODE_EMDRV_SPIDRV_IDLE, ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, RTCDRV_StopTimer(), and spidrvSlave.

Ecode_t SPIDRV_DeInit ( SPIDRV_Handle_t handle )

Deinitialize a SPI driver instance.

Parameters

[in] handle Pointer to a SPI driver handle.

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

Definition at line 347 of file spidrv.c.

References CMU_ClockEnable(), DMADRV_DeInit(), DMADRV_FreeChannel(), DMADRV_StopTransfer(), ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, RTCDRV_FreeTimer(), RTCDRV_StopTimer(), spidrvSlave, and USART_Reset().

Ecode_t SPIDRV_GetBitrate	(	SPIDRV_Handle_t	handle,
		uint32_t *	bitRate
	)

Get current SPI bus bitrate.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 443 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, ECODE_EMDRV_SPIDRV_PARAM_ERROR, and USART_BaudrateGet().

Ecode_t SPIDRV_GetFramelength	(	SPIDRV_Handle_t	handle,
		uint32_t *	frameLength
	)

Get current SPI framelength.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 472 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, and ECODE_EMDRV_SPIDRV_PARAM_ERROR.

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

Get the status of a 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 a 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.

Definition at line 507 of file spidrv.c.

References CORE_ATOMIC_SECTION, ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, and ECODE_EMDRV_SPIDRV_PARAM_ERROR.

Ecode_t SPIDRV_Init	(	SPIDRV_Handle_t	handle,
		SPIDRV_Init_t *	initData
	)

Initialize a SPI driver instance.

Parameters

[out]	handle	Pointer to a SPI driver handle, refer to SPIDRV_Handle_t.
[in]	initData	Pointer to an initialization data structure, refer to SPIDRV_Init_t.

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

Definition at line 101 of file spidrv.c.

References _USART_ROUTE_LOCATION_SHIFT, USART_InitSync_TypeDef::baudrate, SPIDRV_Init::bitOrder, SPIDRV_Init::bitRate, SPIDRV_Init::clockMode, USART_InitSync_TypeDef::clockMode, CMU_ClockEnable(), cmuClock_GPIO, cmuClock_HFPER, cmuClock_USART1, cmuClock_USART2, cmuClock_USARTRF0, CORE_DECLARE_IRQ_STATE, CORE_ENTER_ATOMIC, CORE_EXIT_ATOMIC, SPIDRV_Init::csControl, USART_TypeDef::CTRL, DMADRV_AllocateChannel(), DMADRV_Init(), dmadrvPeripheralSignal_USART1_RXDATAV, dmadrvPeripheralSignal_USART1_TXBL, dmadrvPeripheralSignal_USART2_RXDATAV, dmadrvPeripheralSignal_USART2_TXBL, dmadrvPeripheralSignal_USARTRF0_RXDATAV, dmadrvPeripheralSignal_USARTRF0_TXBL, ECODE_EMDRV_DMADRV_OK, ECODE_EMDRV_RTCDRV_OK, ECODE_EMDRV_SPIDRV_DMA_ALLOC_ERROR, ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, ECODE_EMDRV_SPIDRV_PARAM_ERROR, ECODE_EMDRV_SPIDRV_TIMER_ALLOC_ERROR, USART_InitSync_TypeDef::master, USART_InitSync_TypeDef::msbf, SPIDRV_Init::port, SPIDRV_Init::portLocation, USART_TypeDef::ROUTE, RTCDRV_AllocateTimer(), RTCDRV_Init(), spidrvBitOrderMsbFirst, spidrvClockMode0, spidrvClockMode1, spidrvClockMode2, spidrvClockMode3, spidrvCsControlAuto, spidrvMaster, spidrvSlave, SPIDRV_Init::type, USART1, USART2, USART_CTRL_AUTOCS, USART_InitSync(), USART_INITSYNC_DEFAULT, USART_ROUTE_CLKPEN, USART_ROUTE_CSPEN, USART_ROUTE_RXPEN, USART_ROUTE_TXPEN, usartClockMode0, usartClockMode1, usartClockMode2, usartClockMode3, and USARTRF0.

Referenced by ezradio_hal_SpiInit(), and KSZ8851SNL_SPI_Init().

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

Start a SPI master receive transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 559 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, and spidrvSlave.

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

Start a SPI master blocking receive transfer.

Note: The MOSI wire will transmit SPIDRV_Init_t::dummyTxValue.
This function is blocking and returns when the transfer has completed, or when SPIDRV_AbortTransfer() is called.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 602 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, and spidrvSlave.

Referenced by ezradio_hal_SpiReadByte(), ezradio_hal_SpiReadData(), and KSZ8851SNL_SPI_Receive().

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

Start a SPI master transfer.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 644 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, ECODE_EMDRV_SPIDRV_PARAM_ERROR, and spidrvSlave.

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

Start a SPI master blocking transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 694 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, ECODE_EMDRV_SPIDRV_PARAM_ERROR, and spidrvSlave.

Referenced by ezradio_hal_SpiWriteReadData(), and KSZ8851SNL_SPI_ReadRegister().

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

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

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 743 of file spidrv.c.

References CORE_DECLARE_IRQ_STATE, CORE_ENTER_ATOMIC, CORE_EXIT_ATOMIC, ECODE_EMDRV_SPIDRV_BUSY, ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_MODE_ERROR, rxBuffer, and spidrvSlave.

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

Start a SPI master transmit transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 801 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, and spidrvSlave.

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

Start a 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 completed.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 843 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, and spidrvSlave.

Referenced by ezradio_hal_SpiWriteByte(), ezradio_hal_SpiWriteData(), and KSZ8851SNL_SPI_Transmit().

Ecode_t SPIDRV_SetBitrate	(	SPIDRV_Handle_t	handle,
		uint32_t	bitRate
	)

Set SPI bus bitrate.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 879 of file spidrv.c.

References CORE_DECLARE_IRQ_STATE, CORE_ENTER_ATOMIC, CORE_EXIT_ATOMIC, ECODE_EMDRV_SPIDRV_BUSY, ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, and USART_BaudrateSyncSet().

Ecode_t SPIDRV_SetFramelength	(	SPIDRV_Handle_t	handle,
		uint32_t	frameLength
	)

Set SPI framelength.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 914 of file spidrv.c.

References _USART_FRAME_DATABITS_FOUR, _USART_FRAME_DATABITS_MASK, _USART_FRAME_DATABITS_SHIFT, _USART_FRAME_DATABITS_SIXTEEN, CORE_DECLARE_IRQ_STATE, CORE_ENTER_ATOMIC, CORE_EXIT_ATOMIC, ECODE_EMDRV_SPIDRV_BUSY, ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE, ECODE_EMDRV_SPIDRV_OK, and ECODE_EMDRV_SPIDRV_PARAM_ERROR.

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

Start a SPI slave receive transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 969 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, RTCDRV_StartTimer(), rtcdrvTimerTypeOneshot, spidrvMaster, and spidrvSlaveStartDelayed.

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

Start a SPI slave blocking receive transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 1033 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, RTCDRV_StartTimer(), rtcdrvTimerTypeOneshot, spidrvMaster, and spidrvSlaveStartDelayed.

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

Start a SPI slave transfer.

Parameters

[in]	handle	Pointer to a 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.

Definition at line 1095 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, ECODE_EMDRV_SPIDRV_PARAM_ERROR, RTCDRV_StartTimer(), rtcdrvTimerTypeOneshot, spidrvMaster, and spidrvSlaveStartDelayed.

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

Start a SPI slave blocking transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 1166 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, ECODE_EMDRV_SPIDRV_PARAM_ERROR, RTCDRV_StartTimer(), rtcdrvTimerTypeOneshot, spidrvMaster, and spidrvSlaveStartDelayed.

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

Start a SPI slave transmit transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 1235 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, RTCDRV_StartTimer(), rtcdrvTimerTypeOneshot, spidrvMaster, and spidrvSlaveStartDelayed.

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

Start a SPI slave blocking transmit transfer.

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

Parameters

[in]	handle	Pointer to a 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.

Definition at line 1299 of file spidrv.c.

References ECODE_EMDRV_SPIDRV_MODE_ERROR, ECODE_EMDRV_SPIDRV_OK, RTCDRV_StartTimer(), rtcdrvTimerTypeOneshot, spidrvMaster, and spidrvSlaveStartDelayed.

Detailed Description

Introduction

Configuration Options

The API

Example

Data Structures

Macros

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Enumerations

Functions

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation