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rt-thread-official/bsp/synopsys/embarc/device/device_hal/inc/dev_spi.h

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[bsp][synopsys] add the support of synopsys arc emsk * the initial support of synopsys designware arc processor * the initial support of synospsy ARC EM Starter Kit * the bsp code is based on embarc which is a common SDK for all synopsys ARC-based boards * use "scons --gdb" to debug emsk with em9d configuration * for detailed board information, pls go embarc.org Signed-off-by: Wayne Ren <wei.ren@synopsys.com>
2019-01-23 17:29:54 +08:00
/* ------------------------------------------
* Copyright (c) 2017, Synopsys, Inc. All rights reserved.
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1) Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2) Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* 3) Neither the name of the Synopsys, Inc., nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* \version 2017.03
* \date 2014-06-16
* \author Huaqi Fang(Huaqi.Fang@synopsys.com)
--------------------------------------------- */
/**
* \defgroup DEVICE_HAL_SPI SPI Device HAL Interface
* \ingroup DEVICE_HAL_DEF
* \brief definitions for spi device hardware layer (\ref dev_spi.h)
* \details provide interfaces for spi driver to implement
* Here is a diagram for the spi interface.
*
* \htmlonly
* <div class="imagebox">
* <div style="width: 600px">
* <img src="pic/dev_spi_hal.jpg" alt="SPI Device HAL Interface Diagram"/>
* <p>SPI Device HAL Interface Diagram</p>
* </div>
* </div>
* \endhtmlonly
*
* @{
*
* \file
* \brief spi device hardware layer definitions
* \details provide common definitions for spi device,
* then software developer can develop spi driver
* following this definitions, and the applications
* can directly call this definition to realize functions
*/
#ifndef _DEVICE_HAL_SPI_H_
#define _DEVICE_HAL_SPI_H_
#include "device/device_hal/inc/dev_common.h"
/**
* \defgroup DEVICE_HAL_SPI_CTRLCMD SPI Device Control Commands
* \ingroup DEVICE_HAL_SPI
* \brief Definitions for spi control command, used in \ref dev_spi::spi_control "SPI IO Control"
* \details These commands defined here can be used in user code directly.
* - Parameters Usage
* - For passing parameters like integer, just use uint32_t/int32_t to directly pass values
* - For passing parameters for a structure, please use pointer to pass values
* - For getting some data, please use pointer to store the return data
* - Common Return Values
* - \ref E_OK, Control device successfully
* - \ref E_CLSED, Device is not opened
* - \ref E_OBJ, Device object is not valid or not exists
* - \ref E_PAR, Parameter is not valid for current control command
* - \ref E_SYS, Control device failed, due to hardware issues such as device is disabled
* - \ref E_CTX, Control device failed, due to different reasons like in transfer state
* - \ref E_NOSPT, Control command is not supported or not valid
* - Usage Comment
* - For SPI poll or interrupt read/write/transfer operations, only 1 operation can be triggered.
* If there is a operation is running, any other operation will return \ref E_CTX
* - If SPI is in transfer, then the following operations may return \ref E_CTX. Like
* \ref SPI_CMD_SET_CLK_MODE, \ref SPI_CMD_SET_TXINT_BUF, \ref SPI_CMD_SET_RXINT_BUF,
* \ref SPI_CMD_SET_TXINT, \ref SPI_CMD_SET_RXINT, \ref SPI_CMD_ABORT_TX, \ref SPI_CMD_ABORT_RX,
* \ref SPI_CMD_FLUSH_TX, \ref SPI_CMD_FLUSH_RX, \ref SPI_CMD_SET_DFS, \ref SPI_CMD_TRANSFER_POLLING,
* \ref SPI_CMD_TRANSFER_INT, \ref SPI_CMD_ABORT_XFER, \ref SPI_CMD_MST_SEL_DEV, \ref SPI_CMD_MST_DSEL_DEV,
* \ref SPI_CMD_MST_SET_FREQ and \ref dev_spi::spi_write "SPI Poll Write" or \ref dev_spi::spi_read "SPI Poll Read".
* @{
*/
/** Define SPI control commands for common usage */
#define DEV_SET_SPI_SYSCMD(cmd) DEV_SET_SYSCMD((cmd))
/** Define SPI control commands for master usage */
#define DEV_SET_SPI_MST_SYSCMD(cmd) DEV_SET_SYSCMD(0x00001000|(cmd))
/** Define SPI control commands for slave usage */
#define DEV_SET_SPI_SLV_SYSCMD(cmd) DEV_SET_SYSCMD(0x00002000|(cmd))
/* ++++ Common commands for SPI Device ++++ */
/**
* Get \ref dev_spi_info::status "current device status"
* - Param type : uint32_t *
* - Param usage : store result of current status
* - Return value explanation :
*/
#define SPI_CMD_GET_STATUS DEV_SET_SPI_SYSCMD(0)
/**
* set the \ref dev_spi_info::clk_mode "clock mode" of spi transfer
* - Param type : uint32_t
* - Param usage : spi clock mode to choose clock phase and clock polarity
* - Return value explanation :
*/
#define SPI_CMD_SET_CLK_MODE DEV_SET_SPI_SYSCMD(1)
/**
* set spi \ref dev_spi_info::dfs "data frame size"
* - Param type : uint32_t
* - Param usage : should > 0
* - Return value explanation : If dfs is not supported, then return \ref E_SYS
*/
#define SPI_CMD_SET_DFS DEV_SET_SPI_SYSCMD(2)
/**
* set the \ref dev_spi_info::dummy "dummy data" during spi transfer
* - Param type : uint32_t
* - Param usage : dummy data to transfer
* - Return value explanation :
*/
#define SPI_CMD_SET_DUMMY_DATA DEV_SET_SPI_SYSCMD(3)
/**
* Set \ref dev_spi_cbs::tx_cb "spi transmit success callback" function
* when all required bytes are transmitted for interrupt method
* - Param type : \ref DEV_CALLBACK * or NULL
* - Param usage : transmit success callback function for spi
* - Return value explanation :
*/
#define SPI_CMD_SET_TXCB DEV_SET_SPI_SYSCMD(4)
/**
* Set \ref dev_spi_cbs::rx_cb "spi receive success callback" function
* when all required bytes are received for interrupt method
* - Param type : \ref DEV_CALLBACK * or NULL
* - Param usage : receive success callback function for spi
* - Return value explanation :
*/
#define SPI_CMD_SET_RXCB DEV_SET_SPI_SYSCMD(5)
/**
* Set \ref dev_spi_cbs::xfer_cb "spi transfer success callback" function
* when all required transfer are done for interrupt method
* - Param type : \ref DEV_CALLBACK * or NULL
* - Param usage : transfer success callback function for spi
* - Return value explanation :
*/
#define SPI_CMD_SET_XFERCB DEV_SET_SPI_SYSCMD(6)
/**
* Set \ref dev_spi_cbs::err_cb "spi transfer error callback" function
* when something error happened for interrupt method
* - Param type : \ref DEV_CALLBACK * or NULL
* - Param usage : transfer error callback function for spi
* - Return value explanation :
*/
#define SPI_CMD_SET_ERRCB DEV_SET_SPI_SYSCMD(7)
/**
* Set buffer in interrupt transmit, and it will set \ref dev_spi_info::xfer "spi tranfer".
* - SPI master and slave mode use case \n
* For both master and slave mode, if you set tx buffer to NULL, when tx interrupt is enabled and entered into tx interrupt,
* it will automatically disable the tx interrupt, so when you want to transfer something, you need to set the
* tx buffer to Non-NULL and enable tx interrupt, when the tx buffer is sent, it will disable the tx interrupt
* and call tx callback function if available.
* - Param type : DEV_BUFFER * or NULL
* - Param usage : buffer structure pointer, if param is NULL, then it will set xfer to empty
* - Return value explanation :
*/
#define SPI_CMD_SET_TXINT_BUF DEV_SET_SPI_SYSCMD(8)
/**
* Set buffer in interrupt receive, and it will set \ref dev_spi_info::xfer "spi tranfer".
* - SPI master mode use case \n
* Similar to \ref SPI_CMD_SET_TXINT_BUF
* - SPI slave mode use case \n
* Similiar to \ref SPI_CMD_SET_TXINT_BUF
* - Param type : DEV_BUFFER * or NULL
* - Param usage : buffer structure pointer, if param is NULL, then it will set xfer to empty
* - Return value explanation :
*/
#define SPI_CMD_SET_RXINT_BUF DEV_SET_SPI_SYSCMD(9)
/**
* Enable or disable transmit interrupt,
* for master mode, only one of tx and rx interrupt can be enabled,
* if tx interrupt is enabled, then rx interrupt can't be enabled.
* - Param type : uint32_t
* - Param usage : enable(none-zero) or disable(zero) flag
* - Return value explanation :
*/
#define SPI_CMD_SET_TXINT DEV_SET_SPI_SYSCMD(10)
/**
* Enable or disable receive interrupt,
* for master mode, only one of tx and rx interrupt can be enabled,
* if rx interrupt is enabled, then tx interrupt can't be enabled.
* - Param type : uint32_t
* - Param usage : enable(none-zero) or disable(zero) flag
* - Return value explanation :
*/
#define SPI_CMD_SET_RXINT DEV_SET_SPI_SYSCMD(11)
/**
* start the transfer by polling
* - Param type : \ref DEV_SPI_TRANSFER *
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_TRANSFER_POLLING DEV_SET_SPI_SYSCMD(12)
/**
* start the transfer by interrupt
* - Param type : \ref DEV_SPI_TRANSFER * or NULL
* - Param usage : If NULL, it will disable transfer interrupt, if not NULL, it will enable transfer interrupt
* - Return value explanation :
*/
#define SPI_CMD_TRANSFER_INT DEV_SET_SPI_SYSCMD(13)
/**
* Abort current interrupt transmit operation if tx interrupt enabled,
* it will disable transmit interrupt, and set \ref DEV_IN_TX_ABRT
* in \ref dev_spi_info::status "status" variable,
* and call the transmit callback function, when tx callback is finished,
* it will clear \ref DEV_IN_TX_ABRT and return
* - Param type : NULL
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_ABORT_TX DEV_SET_SPI_SYSCMD(14)
/**
* Abort current interrupt receive operation if rx interrupt enabled,
* it will disable receive interrupt, and set \ref DEV_IN_TX_ABRT
* in \ref dev_spi_info::status "status" variable,
* and call the receive callback function, when rx callback is finished,
* it will clear \ref DEV_IN_TX_ABRT and return
* - Param type : NULL
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_ABORT_RX DEV_SET_SPI_SYSCMD(15)
/**
* Abort current interrupt transfer operation if transfer is issued,
* it will disable transfer interrupt, and set \ref DEV_IN_XFER_ABRT
* in \ref dev_spi_info::status "status" variable,
* and call the transfer callback function, when xfer callback is finished,
* it will clear \ref DEV_IN_XFER_ABRT and return
* - Param type : NULL
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_ABORT_XFER DEV_SET_SPI_SYSCMD(16)
/**
* Do a software reset for SPI device, it will stop current transfer,
* and clear error state and bring device to normal state, set next condition to STOP
* - Param type : NULL
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_RESET DEV_SET_SPI_SYSCMD(17)
/**
* Flush spi tx fifo, this will clear the data in tx fifo
* - Param type : NULL
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_FLUSH_TX DEV_SET_SPI_SYSCMD(18)
/**
* Flush spi rx fifo, this will clear the data in rx fifo
* - Param type : NULL
* - Param usage :
* - Return value explanation :
*/
#define SPI_CMD_FLUSH_RX DEV_SET_SPI_SYSCMD(19)
/**
* Enable spi device
* - Param type : NULL
* - Param usage : param is not required
* - Return value explanation :
*/
#define SPI_CMD_ENA_DEV DEV_SET_SPI_SYSCMD(20)
/**
* Disable spi device, when device is disabled,
* only \ref SPI_CMD_ENA_DEV, \ref SPI_CMD_DIS_DEV,
* \ref SPI_CMD_GET_STATUS and \ref SPI_CMD_RESET
* commands can be executed, other commands will return \ref E_SYS
* - Param type : NULL
* - Param usage : param is not required
* - Return value explanation :
*/
#define SPI_CMD_DIS_DEV DEV_SET_SPI_SYSCMD(21)
/**
* Get how many bytes space in spi are available to transmit,
* this can be used in interrupt callback functions,
* cooperate with \ref dev_spi::spi_write "spi_write" API to realize non-blocked write
* - Param type : int32_t *
* - Param usage : store the write available bytes, > 0 for available bytes, 0 for not available
* - Return value explanation :
*/
#define SPI_CMD_GET_TXAVAIL DEV_SET_SPI_SYSCMD(22)
/**
* Get how many bytes in spi are available to receive,
* this can be used in interrupt callback functions,
* cooperate with \ref dev_spi::spi_read "spi_read" API to realize non-blocked read
* - Param type : int32_t *
* - Param usage : store the read available bytes, > 0 for available bytes, 0 for not available
* - Return value explanation :
*/
#define SPI_CMD_GET_RXAVAIL DEV_SET_SPI_SYSCMD(23)
/* ++++ Master only commands for SPI Device ++++ */
/**
* select spi slave device
* - Param type : uint32_t
* - Param usage : the number of spi slave device to select
* - Return value explanation : return \ref E_SYS when selection can't be done, return \ref E_CTX during transfer
*/
#define SPI_CMD_MST_SEL_DEV DEV_SET_SPI_MST_SYSCMD(0)
/**
* de-select spi slave device
* - Param type : uint32_t
* - Param usage : the number of spi slave device to de-select
* - Return value explanation : return \ref E_SYS when selection can't be done, return \ref E_CTX during transfer
*/
#define SPI_CMD_MST_DSEL_DEV DEV_SET_SPI_MST_SYSCMD(1)
/**
* Set \ref dev_spi_info::freq "spi frequency".
* - Param type : uint32_t
* - Param usage : spi freq
* - Return value explanation : no return
*/
#define SPI_CMD_MST_SET_FREQ DEV_SET_SPI_MST_SYSCMD(2)
/* ++++ Slave only commands for SPI Device ++++ */
/* \todo add spi slave related CMDs */
/** @} */
/**
* \defgroup DEVICE_HAL_SPI_CALLBACK SPI Interrupt callback functions
* \ingroup DEVICE_HAL_SPI
* \brief callback function structure for SPI device
* @{
*/
typedef struct dev_spi_cbs {
DEV_CALLBACK tx_cb; /*!< spi data transmit success required bytes callback */
DEV_CALLBACK rx_cb; /*!< spi data receive success required bytes callback */
DEV_CALLBACK err_cb; /*!< spi error callback */
DEV_CALLBACK xfer_cb; /*!< transfer callback */
} DEV_SPI_CBS, *DEV_SPI_CBS_PTR;
/** @} */
/** SPI Clock Mode */
typedef enum spi_clk_mode {
SPI_CPOL_0_CPHA_0 = 0, /*!< Inactive state of serial clock is low, serial clock toggles in middle of first data bit */
SPI_CPOL_0_CPHA_1 = 1, /*!< Inactive state of serial clock is low, serial clock toggles at start of first data bit */
SPI_CPOL_1_CPHA_0 = 2, /*!< Inactive state of serial clock is high, serial clock toggles in middle of first data bit */
SPI_CPOL_1_CPHA_1 = 3, /*!< Inactive state of serial clock is high, serial clock toggles at start of first data bit */
SPI_CLK_MODE_0 = SPI_CPOL_0_CPHA_0, /*!< Equal to \ref SPI_CPOL_0_CPHA_0 */
SPI_CLK_MODE_1 = SPI_CPOL_0_CPHA_1, /*!< Equal to \ref SPI_CPOL_0_CPHA_1 */
SPI_CLK_MODE_2 = SPI_CPOL_1_CPHA_0, /*!< Equal to \ref SPI_CPOL_1_CPHA_0 */
SPI_CLK_MODE_3 = SPI_CPOL_1_CPHA_1 /*!< Equal to \ref SPI_CPOL_1_CPHA_1 */
} SPI_CLK_MODE;
#define SPI_CLK_MODE_DEFAULT SPI_CPOL_0_CPHA_0 /*!< Default SPI device clock mode */
/**
* \defgroup DEVICE_HAL_SPI_DEVSTRUCT SPI Device Structure
* \ingroup DEVICE_HAL_SPI
* \brief contains definitions of spi device structure.
* \details this structure will be used in user implemented code, which was called
* Device Driver Implement Layer for spi to realize in user code.
* @{
*/
typedef struct dev_spi_transfer DEV_SPI_TRANSFER, *DEV_SPI_TRANSFER_PTR;
/**
* \brief spi read and write data structure used by \ref SPI_CMD_TRANSFER
* spi write then read data
*
*/
struct dev_spi_transfer {
DEV_SPI_TRANSFER *next;
/* Calc by software */
/** tot_len = (tx_totlen>rx_totlen)?tx_totlen:rx_totlen */
uint32_t tot_len;
/* Set by user */
uint8_t *tx_buf;
uint32_t tx_ofs;
uint32_t tx_len;
uint8_t *rx_buf;
uint32_t rx_ofs;
uint32_t rx_len;
/* Should auto set to proper value during set buffer value */
uint32_t tx_idx;
uint32_t tx_totlen; /** tx_totlen = tx_len + tx_ofs */
uint32_t rx_idx;
uint32_t rx_totlen; /** rx_totlen = rx_len + rx_ofs */
};
/** Set tx buffer of device spi transfer */
#define DEV_SPI_XFER_SET_TXBUF(xfer, buf, ofs, len) { \
(xfer)->tx_buf = (uint8_t *)(buf); \
(xfer)->tx_len = (uint32_t)(len); \
(xfer)->tx_ofs = (uint32_t)(ofs); \
(xfer)->tx_idx = 0; \
(xfer)->tx_totlen = ( (uint32_t)(len) \
+ (uint32_t)(ofs) ) ; \
}
/** Set rx buffer of device spi transfer */
#define DEV_SPI_XFER_SET_RXBUF(xfer, buf, ofs, len) { \
(xfer)->rx_buf = (uint8_t *)(buf); \
(xfer)->rx_len = (uint32_t)(len); \
(xfer)->rx_ofs = (uint32_t)(ofs); \
(xfer)->rx_idx = 0; \
(xfer)->rx_totlen = ( (uint32_t)(len) \
+ (uint32_t)(ofs) ) ; \
}
/** Calculate total length of current transfer without next transfer */
#define DEV_SPI_XFER_CALC_TOTLEN(xfer) (xfer)->tot_len = \
((xfer)->tx_totlen > (xfer)->rx_totlen) ? (xfer)->tx_totlen : (xfer)->rx_totlen ;
/** Set next SPI transfer */
#define DEV_SPI_XFER_SET_NEXT(xfer, next_xfer) (xfer)->next = (next_xfer);
/** Init spi transfer */
#define DEV_SPI_XFER_INIT(xfer) { \
(xfer)->tx_idx = 0; \
(xfer)->rx_idx = 0; \
(xfer)->tx_totlen = ((xfer)->tx_len \
+ (xfer)->tx_ofs) ; \
(xfer)->rx_totlen = ((xfer)->rx_len \
+ (xfer)->rx_ofs) ; \
DEV_SPI_XFER_CALC_TOTLEN(xfer); \
}
/**
* \brief spi information struct definition
* \details informations about spi open state, working state,
* frequency, spi registers, working method, interrupt number
*/
typedef struct dev_spi_info {
void *spi_ctrl; /*!< spi control related */
uint32_t status; /*!< current working status, refer to \ref DEVICE_HAL_COMMON_DEVSTATUS, this should be \ref DEV_ENABLED for first open */
uint32_t freq; /*!< spi working baudrate */
uint8_t mode; /*!< spi working mode (master/slave) */
uint8_t clk_mode; /*!< spi clock phase and polarity, this should be \ref SPI_CLK_MODE_DEFAULT for first open */
uint8_t opn_cnt; /*!< spi open count, open it will increase 1, close it will decrease 1, 0 for close, >0 for open */
uint8_t slave; /*!< current selected slave device no, start from 0, this should be \ref SPI_SLAVE_NOT_SELECTED for first open */
uint8_t dfs; /*!< data frame size, this should be \ref SPI_DFS_DEFAULT for first open */
DEV_SPI_TRANSFER xfer; /*!< spi transfer, this should be set to all zero for first open */
DEV_SPI_CBS spi_cbs; /*!< spi callbacks, for both master and slave mode, this should be all NULL for first open */
void *extra; /*!< a extra pointer to get hook to applications which should not used by bsp developer,
this should be NULL for first open and you can \ref DEV_SPI_INFO_SET_EXTRA_OBJECT "set"
or \ref DEV_SPI_INFO_GET_EXTRA_OBJECT "get" the extra information pointer */
uint32_t dummy; /*!< dummy write data when send and receive, this should be \ref SPI_DUMMY_DEFAULT for first open */
} DEV_SPI_INFO, * DEV_SPI_INFO_PTR;
/** Set extra information pointer of spi info */
#define DEV_SPI_INFO_SET_EXTRA_OBJECT(spi_info_ptr, extra_info) (spi_info_ptr)->extra = (void *)(extra_info)
/** Get extra information pointer of spi info */
#define DEV_SPI_INFO_GET_EXTRA_OBJECT(spi_info_ptr) ((spi_info_ptr)->extra)
#define SPI_DFS_DEFAULT 8 /*!< Default spi data frame size */
#define SPI_SLAVE_NOT_SELECTED (0xFF) /*!< Slave is not selected */
#define SPI_DUMMY_DEFAULT (0xFF) /*!< default dummy value for first open */
/**
* \brief spi device interface definition
* \details define spi device interface, like spi information structure,
* fuctions to get spi info, open/close/control spi, send/receive data by spi
* \note all this details are implemented by user in user porting code
*/
typedef struct dev_spi {
DEV_SPI_INFO spi_info; /*!< spi device information */
int32_t (*spi_open) (uint32_t mode, uint32_t param); /*!< open spi device in master/slave mode, \
when in master mode, param stands for frequency, \
when in slave mode, param stands for clock mode */
int32_t (*spi_close) (void); /*!< close spi device */
int32_t (*spi_control) (uint32_t ctrl_cmd, void *param); /*!< control spi device */
int32_t (*spi_write) (const void *data, uint32_t len); /*!< send data to spi device (blocking method) */
int32_t (*spi_read) (void *data, uint32_t len); /*!< read data from spi device (blocking method) */
} DEV_SPI, * DEV_SPI_PTR;
/**
* \fn int32_t (* dev_spi::spi_open) (uint32_t mode, uint32_t param)
* \details open an spi device with selected mode (master or slave) with defined \ref param
* \param[in] mode working mode (\ref DEV_MASTER_MODE "master" or \ref DEV_SLAVE_MODE "slave")
* \param[in] param When mode is \ref DEV_MASTER_MODE, param stands for \ref dev_spi_info::freq "frequency",
* when mode is \ref DEV_SLAVE_MODE, param stands for \ref dev_spi_info::clk_mode "slave clock mode"
* \retval E_OK Open successfully without any issues
* \retval E_OPNED If device was opened before with different parameters,
* then just increase the \ref dev_spi_info::opn_cnt "opn_cnt" and return \ref E_OPNED
* \retval E_OBJ Device object is not valid
* \retval E_SYS Device is opened for different mode before, if you want to open it with different mode, you need to fully close it first.
* \retval E_PAR Parameter is not valid
* \retval E_NOSPT Open settings are not supported
*/
/**
* \fn int32_t (* dev_spi::spi_close) (void)
* \details close an spi device, just decrease the \ref dev_spi_info::opn_cnt "opn_cnt",
* if \ref dev_spi_info::opn_cnt "opn_cnt" equals 0, then close the device
* \retval E_OK Close successfully without any issues(including scenario that device is already closed)
* \retval E_OPNED Device is still opened, the device \ref dev_spi_info::opn_cnt "opn_cnt" decreased by 1
* \retval E_OBJ Device object is not valid
*/
/**
* \fn int32_t (* dev_spi::spi_control) (uint32_t ctrl_cmd, void *param)
* \details control an spi device by \ref ctrl_cmd, with passed \ref param.
* you can control spi device using predefined spi control commands defined using \ref DEV_SET_SYSCMD
* (which must be implemented by bsp developer), such as \ref SPI_CMD_MST_SET_FREQ "set spi master frequency",
* \ref SPI_CMD_FLUSH_TX "flush tx" and \ref DEVICE_HAL_SPI_CTRLCMD "more".
* And you can also control spi device using your own specified commands defined using \ref DEV_SET_USRCMD,
* but these specified commands should be defined in your own spi device driver implementation.
* \param[in] ctrl_cmd \ref DEVICE_HAL_SPI_CTRLCMD "control command", to change or get some thing related to spi
* \param[in,out] param parameters that maybe argument of the command,
* or return values of the command, must not be NULL
* \retval E_OK Control device successfully
* \retval E_CLSED Device is not opened
* \retval E_OBJ Device object is not valid or not exists
* \retval E_PAR Parameter is not valid for current control command
* \retval E_SYS Control device failed, due to hardware issues, such as device is disabled
* \retval E_CTX Control device failed, due to different reasons like in transfer state
* \retval E_NOSPT Control command is not supported or not valid
*/
/**
* \fn int32_t (* dev_spi::spi_write) (const void *data, uint32_t len)
* \details send \ref data through spi with defined \ref len to slave device .
* \param[in] data pointer to data need to send by spi
* \param[in] len length of data to be sent
* \retval >0 Byte count that was successfully sent for poll method
* \retval E_OBJ Device object is not valid or not exists
* \retval E_PAR Parameter is not valid
* \retval E_CTX Device is still in transfer state
* \retval E_SYS Can't write data to hardware due to hardware issues, such as device is disabled
*/
/**
* \fn int32_t (* dev_spi::spi_read) (void *data, uint32_t len)
* \details receive \ref data of defined \ref len through spi from slave device .
* \param[out] data pointer to data need to received by spi
* \param[in] len length of data to be received
* \retval >0 Byte count that was successfully received for poll method
* \retval E_OBJ Device object is not valid or not exists
* \retval E_CTX Device is still in transfer state
* \retval E_PAR Parameter is not valid
* \retval E_SYS Can't receive data from hardware due to hardware issues, such as device is disabled
*/
/** @} */
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief get an \ref dev_spi "spi device" by spi device id.
* For how to use spi device hal refer to \ref dev_spi "Functions in spi device structure"
* \param[in] spi_id id of spi, defined by user
* \retval !NULL pointer to an \ref dev_spi "spi device structure"
* \retval NULL failed to find the spi device by \ref spi_id
* \note need to implemented by user in user code
*/
extern DEV_SPI_PTR spi_get_dev(int32_t spi_id);
#ifdef __cplusplus
}
#endif
/** @} */
#endif /* _DEVICE_HAL_SPI_H_ */