#include "legato.h"

Macros
#define	LE_SPI_MAX_WRITE_SIZE 1024

#define	LE_SPI_MAX_READ_SIZE 1024

Typedefs
typedef struct le_spi_DeviceHandle *	le_spi_DeviceHandleRef_t

Functions
void	le_spi_ConnectService (void)

le_result_t	le_spi_TryConnectService (void)

void	le_spi_DisconnectService (void)

le_result_t	le_spi_Open (const char deviceName, le_spi_DeviceHandleRef_t handlePtr)

void	le_spi_Close (le_spi_DeviceHandleRef_t handle)

void	le_spi_Configure (le_spi_DeviceHandleRef_t handle, int32_t mode, uint8_t bits, uint32_t speed, int32_t msb)

le_result_t	le_spi_WriteReadHD (le_spi_DeviceHandleRef_t handle, const uint8_t writeDataPtr, size_t writeDataNumElements, uint8_t readDataPtr, size_t *readDataNumElementsPtr)

le_result_t	le_spi_WriteHD (le_spi_DeviceHandleRef_t handle, const uint8_t *writeDataPtr, size_t writeDataNumElements)

le_result_t	le_spi_ReadHD (le_spi_DeviceHandleRef_t handle, uint8_t readDataPtr, size_t readDataNumElementsPtr)

le_result_t	le_spi_WriteReadFD (le_spi_DeviceHandleRef_t handle, const uint8_t writeDataPtr, size_t writeDataNumElements, uint8_t readDataPtr, size_t *readDataNumElementsPtr)

Detailed Description

Legato c_le_spi include file.

Copyright (C) Sierra Wireless Inc. Use of this work is subject to license.

Macro Definition Documentation

#define LE_SPI_MAX_READ_SIZE 1024

Max byte storage size for read buffer

#define LE_SPI_MAX_WRITE_SIZE 1024

Max byte storage size for write buffer

Typedef Documentation

typedef struct le_spi_DeviceHandle* le_spi_DeviceHandleRef_t

Handle for passing to related functions to access the SPI device

Function Documentation

void le_spi_Close ( le_spi_DeviceHandleRef_t handle )

Closes the device associated with the given handle and frees the associated resources.

Note: Once a handle is closed, it's not permitted to use it for future SPI access without first calling Open.

Parameters

[in] handle Handle for the SPI master to close

void le_spi_Configure	(	le_spi_DeviceHandleRef_t	handle,
		int32_t	mode,
		uint8_t	bits,
		uint32_t	speed,
		int32_t	msb
	)

Configures an SPI device's data sample settings. The required values should be included in your target's datasheet. Most common Mode values are 0 and 3.

These are the SPI Mode options:

Mode	Clock Polarity	Clock Phase	Clock Edge
0	0	0	1
1	0	1	0
2	1	0	1
3	1	1	0

Note: This function should be called before any of the Read/Write functions to ensure the SPI bus configuration is in a known state.

Parameters

[in]	handle	Handle for the SPI master to configure
[in]	mode	Choose mode options for the bus per above table
[in]	bits	bits per word, typically 8 bits per word
[in]	speed	max speed (Hz), this is slave dependant
[in]	msb	set as 0 for MSB as first bit or 1 for LSB as first bit

void le_spi_ConnectService ( void )

Connect the current client thread to the service providing this API. Block until the service is available.

For each thread that wants to use this API, either ConnectService or TryConnectService must be called before any other functions in this API. Normally, ConnectService is automatically called for the main thread, but not for any other thread. For details, see Client-specific Functions.

This function is created automatically.

void le_spi_DisconnectService ( void )

Disconnect the current client thread from the service providing this API.

Normally, this function doesn't need to be called. After this function is called, there's no longer a connection to the service, and the functions in this API can't be used. For details, see Client-specific Functions.

This function is created automatically.

le_result_t le_spi_Open	(	const char *	deviceName,
		le_spi_DeviceHandleRef_t *	handlePtr
	)

Opens an SPI device so that the attached device may be accessed.

Returns

LE_OK on success
LE_BAD_PARAMETER if the device name string is bad
LE_NOT_FOUND if the SPI device file could not be found
LE_NOT_PERMITTED if the SPI device file can't be opened for read/write
LE_DUPLICATE if the given device file is already opened by another spiService client
LE_FAULT for non-specific failures

Parameters

[in]	deviceName	Handle for the SPI master to open
[out]	handlePtr	Handle for passing to related functions in order to

le_result_t le_spi_ReadHD	(	le_spi_DeviceHandleRef_t	handle,
		uint8_t *	readDataPtr,
		size_t *	readDataNumElementsPtr
	)

SPI Read for Half Duplex Communication

Returns: LE_OK on success or LE_FAULT on failure.

Parameters

[in]	handle	Handle for the SPI master to perform the read from
[out]	readDataPtr	RX response from slave with number of bytes reserved
[in,out]	readDataNumElementsPtr

le_result_t le_spi_TryConnectService ( void )

Try to connect the current client thread to the service providing this API. Return with an error if the service is not available.

For each thread that wants to use this API, either ConnectService or TryConnectService must be called before any other functions in this API. Normally, ConnectService is automatically called for the main thread, but not for any other thread. For details, see Client-specific Functions.

This function is created automatically.

Returns

LE_OK if the client connected successfully to the service.
LE_UNAVAILABLE if the server is not currently offering the service to which the client is bound.
LE_NOT_PERMITTED if the client interface is not bound to any service (doesn't have a binding).
LE_COMM_ERROR if the Service Directory cannot be reached.

le_result_t le_spi_WriteHD	(	le_spi_DeviceHandleRef_t	handle,
		const uint8_t *	writeDataPtr,
		size_t	writeDataNumElements
	)

SPI Write for Half Duplex Communication

Returns: LE_OK on success or LE_FAULT on failure.

Parameters

[in]	handle	Handle for the SPI master to perform the write on
[in]	writeDataPtr	TX command/address being sent to slave with size
[in]	writeDataNumElements

le_result_t le_spi_WriteReadFD	(	le_spi_DeviceHandleRef_t	handle,
		const uint8_t *	writeDataPtr,
		size_t	writeDataNumElements,
		uint8_t *	readDataPtr,
		size_t *	readDataNumElementsPtr
	)

Simultaneous SPI Write and Read for full duplex communication

Returns: LE_OK on success or LE_FAULT on failure.

Parameters

[in]	handle	Handle for the SPI master to perform full duplex write-read on
[in]	writeDataPtr	TX command/address being sent to slave with size
[in]	writeDataNumElements
[out]	readDataPtr	RX response from slave with same buffer size as TX
[in,out]	readDataNumElementsPtr

le_result_t le_spi_WriteReadHD	(	le_spi_DeviceHandleRef_t	handle,
		const uint8_t *	writeDataPtr,
		size_t	writeDataNumElements,
		uint8_t *	readDataPtr,
		size_t *	readDataNumElementsPtr
	)

Performs SPI WriteRead Half Duplex. You can send send Read command/ address of data to read.

Returns: LE_OK on success or LE_FAULT on failure.

Parameters

[in]	handle	Handle for the SPI master to perform the write-read on
[in]	writeDataPtr	TX command/address being sent to slave with size
[in]	writeDataNumElements
[out]	readDataPtr	RX response from slave with number of bytes reserved
[in,out]	readDataNumElementsPtr

/ Build Apps

le_spi_interface.h File Reference

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation