SPIDRV
EMDRV

Detailed Description

SPIDRV 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_t 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_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 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);
}

Data Structures

struct SPIDRV_HandleData
struct SPIDRV_Init

Macros

#define ECODE_EMDRV_SPIDRV_ABORTED ( ECODE_EMDRV_SPIDRV_BASE | 0x00000007)
An 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 allocate 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)
An 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 )
A successful return value.
#define ECODE_EMDRV_SPIDRV_PARAM_ERROR ( ECODE_EMDRV_SPIDRV_BASE | 0x00000002)
An illegal input parameter.
#define ECODE_EMDRV_SPIDRV_TIMEOUT ( ECODE_EMDRV_SPIDRV_BASE | 0x00000005)
An SPI transfer timeout.
#define ECODE_EMDRV_SPIDRV_TIMER_ALLOC_ERROR ( ECODE_EMDRV_SPIDRV_BASE | 0x00000004)
Unable to allocate timeout timer.
#define SPIDRV_MASTER_USART0
Configuration data for SPI master using USART0.
#define SPIDRV_MASTER_USART1
Configuration data for SPI master using USART1.
#define SPIDRV_MASTER_USART2
Configuration data for SPI master using USART2.
#define SPIDRV_MASTER_USARTRF0
Configuration data for SPI master using USARTRF0.
#define SPIDRV_MASTER_USARTRF1
Configuration data for SPI master using USARTRF1.
#define SPIDRV_SLAVE_USART0
Configuration data for SPI slave using USART0.
#define SPIDRV_SLAVE_USART1
Configuration data for SPI slave using USART1.
#define SPIDRV_SLAVE_USART2
Configuration data for SPI slave using USART2.
#define SPIDRV_SLAVE_USARTRF0
Configuration data for SPI slave using USARTRF0.

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

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.

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 592 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 607 of file spidrv.h .

Referenced by KSZ8851SNL_SPI_Init() .

#define SPIDRV_MASTER_USART2
Value:
{ \
USART2, /* USART port */ \
_USART_ROUTE_LOCATION_LOC0, /* 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 637 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 653 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 668 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 683 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 698 of file spidrv.h .

#define SPIDRV_SLAVE_USART2
Value:
{ \
USART2, /* USART port */ \
_USART_ROUTE_LOCATION_LOC0, /* 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 728 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 744 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.

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.

Definition at line 124 of file spidrv.h .

typedef struct SPIDRV_HandleData SPIDRV_HandleData_t

An SPI driver instance handle data structure. The handle is allocated by the application using the SPIDRV. Several concurrent driver instances can exist in an application. The application is neither supposed to write or read the contents of the handle.

typedef struct SPIDRV_Init SPIDRV_Init_t

An SPI driver instance initialization structure. Contains a number of SPIDRV configuration options. This structure 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 76 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 82 of file spidrv.h .

enum SPIDRV_CsControl

SPI master chip select (CS) control scheme.

Enumerator
spidrvCsControlAuto

CS controlled by the SPI driver.

spidrvCsControlApplication

CS controlled by the application.

Definition at line 90 of file spidrv.h .

enum SPIDRV_SlaveStart

SPI slave transfer start scheme.

Enumerator
spidrvSlaveStartImmediate

Transfer starts immediately.

spidrvSlaveStartDelayed

Transfer starts when the bus is idle (CS deasserted).

Definition at line 96 of file spidrv.h .

enum SPIDRV_Type

SPI driver instance type.

Enumerator
spidrvMaster

Act as an SPI master.

spidrvSlave

Act as an SPI slave.

Definition at line 70 of file spidrv.h .

Function Documentation

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.

Definition at line 446 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 , sl_sleeptimer_stop_timer() , and spidrvSlave .

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.

Definition at line 407 of file spidrv.c .

References DMADRV_DeInit() , DMADRV_FreeChannel() , DMADRV_StopTransfer() , ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE , ECODE_EMDRV_SPIDRV_OK , sl_sleeptimer_stop_timer() , and spidrvSlave .

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.

Definition at line 497 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE , ECODE_EMDRV_SPIDRV_OK , and ECODE_EMDRV_SPIDRV_PARAM_ERROR .

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.

Definition at line 524 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 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.

Definition at line 557 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 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_t .
Returns
ECODE_EMDRV_SPIDRV_OK on success. On failure, an appropriate SPIDRV Ecode_t is returned.

Definition at line 129 of file spidrv.c .

References SPIDRV_Init::bitOrder , SPIDRV_Init::bitRate , SPIDRV_Init::clockMode , CORE_DECLARE_IRQ_STATE , CORE_ENTER_ATOMIC , CORE_EXIT_ATOMIC , SPIDRV_Init::csControl , DMADRV_AllocateChannel() , DMADRV_Init() , ECODE_EMDRV_DMADRV_OK , ECODE_EMDRV_SPIDRV_DMA_ALLOC_ERROR , ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE , ECODE_EMDRV_SPIDRV_OK , ECODE_EMDRV_SPIDRV_PARAM_ERROR , SPIDRV_Init::frameLength , SPIDRV_Init::port , SPIDRV_Init::portLocation , sl_sleeptimer_init() , spidrvBitOrderMsbFirst , spidrvClockMode0 , spidrvClockMode1 , spidrvClockMode2 , spidrvClockMode3 , spidrvCsControlAuto , spidrvMaster , spidrvSlave , and SPIDRV_Init::type .

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 an SPI master receive transfer.

Note
The MOSI wire will transmit SPIDRV_Init_t::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.

Definition at line 604 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 an SPI master blocking receive transfer.

Note
The MOSI wire will transmit SPIDRV_Init_t::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.

Definition at line 645 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 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.

Definition at line 685 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 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.

Definition at line 732 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 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.

Definition at line 778 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 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.

Definition at line 832 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 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.

Definition at line 872 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 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.

Definition at line 906 of file spidrv.c .

References CORE_DECLARE_IRQ_STATE , CORE_ENTER_ATOMIC , CORE_EXIT_ATOMIC , ECODE_EMDRV_SPIDRV_BUSY , ECODE_EMDRV_SPIDRV_ILLEGAL_HANDLE , and ECODE_EMDRV_SPIDRV_OK .

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.

Definition at line 939 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 ECODE_EMDRV_SPIDRV_PARAM_ERROR .

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_t::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.

Definition at line 991 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_MODE_ERROR , ECODE_EMDRV_SPIDRV_OK , sl_sleeptimer_start_timer_ms() , spidrvMaster , and spidrvSlaveStartDelayed .

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_t::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.

Definition at line 1046 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_MODE_ERROR , ECODE_EMDRV_SPIDRV_OK , sl_sleeptimer_start_timer_ms() , 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 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.

Definition at line 1099 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_MODE_ERROR , ECODE_EMDRV_SPIDRV_OK , ECODE_EMDRV_SPIDRV_PARAM_ERROR , sl_sleeptimer_start_timer_ms() , spidrvMaster , and spidrvSlaveStartDelayed .

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.

Definition at line 1160 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_MODE_ERROR , ECODE_EMDRV_SPIDRV_OK , ECODE_EMDRV_SPIDRV_PARAM_ERROR , sl_sleeptimer_start_timer_ms() , spidrvMaster , and spidrvSlaveStartDelayed .

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.

Definition at line 1219 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_MODE_ERROR , ECODE_EMDRV_SPIDRV_OK , sl_sleeptimer_start_timer_ms() , spidrvMaster , and spidrvSlaveStartDelayed .

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.

Definition at line 1274 of file spidrv.c .

References ECODE_EMDRV_SPIDRV_MODE_ERROR , ECODE_EMDRV_SPIDRV_OK , sl_sleeptimer_start_timer_ms() , spidrvMaster , and spidrvSlaveStartDelayed .