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/**
* @file spi.h
* @brief Serial Peripheral Interface (SPIMSS) function prototypes and data types.
*/
/* ****************************************************************************
* Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Maxim Integrated
* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
*
* The mere transfer of this software does not imply any licenses
* of trade secrets, proprietary technology, copyrights, patents,
* trademarks, maskwork rights, or any other form of intellectual
* property whatsoever. Maxim Integrated Products, Inc. retains all
* ownership rights.
*
* $Date: 2018-11-07 14:48:15 -0600 (Wed, 07 Nov 2018) $
* $Revision: 39010 $
*
*************************************************************************** */
/* Define to prevent redundant inclusion */
#ifndef _SPI_H_
#define _SPI_H_
/* **** Includes **** */
#include "spi17y_regs.h"
#include "spimss_regs.h"
#include "spimss.h"
#include "spi17y.h"
#include "mxc_sys.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup spi SPI
* @ingroup periphlibs
* @{
*/
/* **** Definitions **** */
/**
* @brief Enums assigning numbers to SPI
*/
typedef enum {
SPI0A, // SPI17Y (0A)
SPI1A, // SPIMSS (1A)
SPI1B, // SPIMSS (1B)
}spi_type;
/**
* @brief Renaming the SPI address names
*/
#define MXC_SPI0 MXC_SPI17Y // SPI0A
#define MXC_SPI1 MXC_SPIMSS // SPI1A & SPI1B
/**
* @brief Renaming Interrupt SPI Interrupt sources
*/
#define SPI0_IRQn SPI17Y_IRQn // SPI0A
#define SPI1_IRQn SPIMSS_IRQn // SPI1A & SPI1B
/**
* @brief Renaming SPI Width
*/
#define SPI0_WIDTH_1 SPI17Y_WIDTH_1 /**< 1 Data Line. */
#define SPI0_WIDTH_2 SPI17Y_WIDTH_2 /**< 2 Data Lines (x2). */
#define SPI0_WIDTH_4 SPI17Y_WIDTH_4 /**< 4 Data Lines (x4). */
/**
* @brief Renaming SPI Polarity
*/
#define SPI_POL_LOW SPI17Y_POL_LOW /**< Slave Select polarity Low. */
#define SPI_POL_HIGH SPI17Y_POL_HIGH /**< Slave Select polarity High. */
/**
* @brief Structure type representing a SPI Master Transaction request.
*/
typedef struct spi_req spi_req_t;
/**
* @brief Callback function type used in asynchronous SPI Master communication requests.
* @details The function declaration for the SPI Master callback is:
* @code
* void callback(spi_req_t * req, int error_code);
* @endcode
* | | |
* | -----: | :----------------------------------------- |
* | \p req | Pointer to a #spi_req object representing the active SPI Master active transaction. |
* | \p error_code | An error code if the active transaction had a failure or #E_NO_ERROR if successful. |
* @note Callback will execute in interrupt context
* @addtogroup spi_async
*/
typedef void (*spi_callback_fn)(void * req, int error_code);
/**
* @brief Structure definition for an SPI Master Transaction request.
* @note When using this structure for an asynchronous operation, the
* structure must remain allocated until the callback is completed.
* @addtogroup spi_async
*/
struct spi_req {
uint8_t ssel; /**< Slave select line to use. (Master only) */
uint8_t deass; /**< Non-zero to de-assert slave select after transaction. (Master only)*/
spi17y_sspol_t ssel_pol; /**< Slave select line polarity. */
const void *tx_data; /**< Pointer to a buffer to transmit data from. NULL if undesired. */
void *rx_data; /**< Pointer to a buffer to store data received. NULL if undesired.*/
spi17y_width_t width; /**< Number of data lines to use, see #spi17y_width_t. */
unsigned len; /**< Number of transfer units to send from the \p tx_data buffer. */
unsigned bits; /**< Number of bits in transfer unit (e.g. 8 for byte, 16 for short) */
unsigned rx_num; /**< Number of bytes actually read into the \p rx_data buffer. */
unsigned tx_num; /**< Number of bytes actually sent from the \p tx_data buffer */
spi_callback_fn callback; /**< Callback function if desired, NULL otherwise */
};
/* **** Function Prototypes **** */
/**
* @brief Initialize the spi.
* @param spi_name spi module to initialize.
* @param mode SPI mode for clock phase and polarity.
* @param freq Desired clock frequency.
*
* @return #E_NO_ERROR if successful, @ref
* MXC_Error_Codes "error" if unsuccessful.
*/
int SPI_Init(spi_type spi_name, unsigned mode, unsigned freq);
/**
* @brief Asynchronously read/write SPI Master data
*
* @param spi_name SPI instance being used
* @param req Pointer to spi request
*
* @return #E_NO_ERROR if successful, @ref
* MXC_Error_Codes "error" if unsuccessful.
*/
int SPI_MasterTransAsync(spi_type spi_name, spi_req_t *req);
/**
* @brief Execute a master transaction.
* @param spi_name SPI instance being used
* @param req Pointer to spi request
*
* @return #E_NO_ERROR if successful, @ref
* MXC_Error_Codes "error" if unsuccessful.
*/
int SPI_MasterTrans(spi_type spi_name, spi_req_t *req);
/**
* @brief Asynchronously read/write SPI Slave data
* @param spi_name SPI instance being used
* @param req Pointer to spi request
*
* @return #E_NO_ERROR if successful, @ref
* MXC_Error_Codes "error" if unsuccessful.
*/
int SPI_SlaveTransAsync(spi_type spi_name, spi_req_t *req);
/**
* @brief Execute a slave transaction.
* @param spi_name SPI instance being used
* @param req Pointer to spi request
*
* @return #E_NO_ERROR if successful, @ref
* MXC_Error_Codes "error" if unsuccessful.
*/
int SPI_SlaveTrans(spi_type spi_name, spi_req_t *req);
/**
* @brief Shutdown SPI module.
* @param spi_name SPI instance being used
*
* @return #E_NO_ERROR if successful, appropriate error otherwise
*/
int SPI_Shutdown(spi_type spi_name);
/**
* @brief Aborts an Asynchronous request
* @param spi_name SPI instance being used
* @param req Pointer to spi request
*
* @return #E_NO_ERROR if successful, @ref
* MXC_Error_Codes "error" if unsuccessful.
*/
int SPI_AbortAsync(spi_type spi_name, spi_req_t *req);
/**
* @brief Execute SPI transaction based on interrupt handler
* @param spi_name SPI instance being used
*
* @return #E_NO_ERROR if successful,
* @return #E_BAD_PARAM otherwise
*/
int SPI_Handler(spi_type spi_name);
/**
* @brief Enable SPI
* @param spi_name Pointer to spi module.
*
* @return #E_NO_ERROR if successful, appropriate error otherwise
*/
int SPI_Enable(spi_type spi_name);
/**
* @brief Disable SPI
* @param spi_name Pointer to spi module.
*
* @return #E_NO_ERROR if successful, appropriate error otherwise
*/
int SPI_Disable(spi_type spi_name);
/**
* @brief Clear the TX and RX FIFO
* @param spi_name Pointer to spi module.
*
* @return #E_NO_ERROR if successful, appropriate error otherwise
*/
int SPI_Clear_fifo(spi_type spi_name);
//-------------------------------------------------------------------------------------------
/**@} end of group spi */
#ifdef __cplusplus
}
#endif
#endif /* _SPI_H_ */
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