241 lines
12 KiB
C
241 lines
12 KiB
C
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/*
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* Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/******************************************************************************
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* @file drv_spi.h
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* @brief header file for spi driver
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* @version V1.0
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* @date 02. June 2017
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******************************************************************************/
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#ifndef _CSI_SPI_H_
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#define _CSI_SPI_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <drv_common.h>
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#include <config.h>
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#ifdef CONFIG_SPI_DMA
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#include <drv_dmac.h>
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#endif
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/// definition for spi handle.
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typedef void *spi_handle_t;
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/****** SPI specific error codes *****/
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typedef enum {
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EDRV_SPI_MODE = (EDRV_SPECIFIC + 1), ///< Specified Mode not supported
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EDRV_SPI_FRAME_FORMAT, ///< Specified Frame Format not supported
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EDRV_SPI_DATA_BITS, ///< Specified number of Data bits not supported
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EDRV_SPI_BIT_ORDER, ///< Specified Bit order not supported
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EDRV_SPI_SS_MODE ///< Specified Slave Select Mode not supported
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} drv_spi_err_e;
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/*----- SPI Control Codes: Mode -----*/
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typedef enum {
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SPI_MODE_INACTIVE = 0, ///< SPI Inactive
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SPI_MODE_MASTER, ///< SPI Master (Output on MOSI, Input on MISO); arg = Bus Speed in bps
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SPI_MODE_SLAVE, ///< SPI Slave (Output on MISO, Input on MOSI)
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SPI_MODE_MASTER_SIMPLEX, ///< SPI Master (Output/Input on MOSI); arg = Bus Speed in bps
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SPI_MODE_SLAVE_SIMPLEX ///< SPI Slave (Output/Input on MISO)
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} spi_mode_e;
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/*----- SPI Control Codes: Mode Parameters: Frame Format -----*/
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typedef enum {
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SPI_FORMAT_CPOL0_CPHA0 = 0, ///< Clock Polarity 0, Clock Phase 0 (default)
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SPI_FORMAT_CPOL0_CPHA1, ///< Clock Polarity 0, Clock Phase 1
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SPI_FORMAT_CPOL1_CPHA0, ///< Clock Polarity 1, Clock Phase 0
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SPI_FORMAT_CPOL1_CPHA1, ///< Clock Polarity 1, Clock Phase 1
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} spi_format_e;
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/*----- SPI Control Codes: Mode Parameters: Bit Order -----*/
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typedef enum {
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SPI_ORDER_MSB2LSB = 0, ///< SPI Bit order from MSB to LSB (default)
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SPI_ORDER_LSB2MSB ///< SPI Bit order from LSB to MSB
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} spi_bit_order_e;
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/*----- SPI Control Codes: Mode Parameters: Data Width in bits -----*/
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#define SPI_DATAWIDTH_MAX 32 /* 1 ~ 32 bit*/
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/*----- SPI Control Codes: Mode Parameters: Slave Select Mode -----*/
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typedef enum {
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/*options for SPI_MODE_MASTER/SPI_MODE_MASTER_SIMPLEX */
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SPI_SS_MASTER_UNUSED = 0, ///< SPI Slave Select when Master: Not used (default).SS line is not controlled by master, For example,SS line connected to a fixed low level
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SPI_SS_MASTER_SW, ///< SPI Slave Select when Master: Software controlled. SS line is configured by software
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SPI_SS_MASTER_HW_OUTPUT, ///< SPI Slave Select when Master: Hardware controlled Output.SS line is activated or deactivated automatically by hardware
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SPI_SS_MASTER_HW_INPUT, ///< SPI Slave Select when Master: Hardware monitored Input.Used in multi-master configuration where a master does not drive the Slave Select when driving the bus, but rather monitors it
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/*options for SPI_MODE_SLAVE/SPI_MODE_SLAVE_SIMPLEX */
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SPI_SS_SLAVE_HW, ///< SPI Slave Select when Slave: Hardware monitored (default).Hardware monitors the Slave Select line and accepts transfers only when the line is active
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SPI_SS_SLAVE_SW ///< SPI Slave Select when Slave: Software controlled.Used only when the Slave Select line is not used. Software controls if the slave is responding or not(enables or disables transfers)
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} spi_ss_mode_e;
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/****** SPI Slave Select Signal definitions *****/
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typedef enum {
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SPI_SS_INACTIVE = 0, ///< SPI Slave Select Signal/line Inactive
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SPI_SS_ACTIVE ///< SPI Slave Select Signal/line Active
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} spi_ss_stat_e;
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/**
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\brief SPI Status
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*/
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typedef struct {
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uint32_t busy : 1; ///< Transmitter/Receiver busy flag
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uint32_t data_lost : 1; ///< Data lost: Receive overflow / Transmit underflow (cleared on start of transfer operation)
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uint32_t mode_fault : 1; ///< Mode fault detected; optional (cleared on start of transfer operation)
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} spi_status_t;
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/****** SPI Event *****/
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typedef enum {
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SPI_EVENT_TRANSFER_COMPLETE = 0, ///< Data Transfer completed. Occurs after call to ARM_SPI_Send, ARM_SPI_Receive, or ARM_SPI_Transfer to indicate that all the data has been transferred. The driver is ready for the next transfer operation
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SPI_EVENT_TX_COMPLETE, ///< Data Transfer completed. Occurs after call to ARM_SPI_Send, ARM_SPI_Receive, or ARM_SPI_Transfer to indicate that all the data has been transferred. The driver is ready for the next transfer operation
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SPI_EVENT_RX_COMPLETE, ///< Data Transfer completed. Occurs after call to ARM_SPI_Send, ARM_SPI_Receive, or ARM_SPI_Transfer to indicate that all the data has been transferred. The driver is ready for the next transfer operation
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SPI_EVENT_DATA_LOST, ///< Data lost: Receive overflow / Transmit underflow. Occurs in slave mode when data is requested/sent by master but send/receive/transfer operation has not been started and indicates that data is lost. Occurs also in master mode when driver cannot transfer data fast enough.
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SPI_EVENT_MODE_FAULT ///< Master Mode Fault (SS deactivated when Master).Occurs in master mode when Slave Select is deactivated and indicates Master Mode Fault. The driver is ready for the next transfer operation.
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} spi_event_e;
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typedef void (*spi_event_cb_t)(spi_event_e event, void *arg); ///< Pointer to \ref spi_event_cb_t : SPI Event call back.
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/**
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\brief SPI Driver Capabilities.
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*/
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typedef struct {
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uint32_t simplex : 1; ///< supports Simplex Mode (Master and Slave)
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uint32_t ti_ssi : 1; ///< supports TI Synchronous Serial Interface
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uint32_t microwire : 1; ///< supports Microwire Interface
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uint32_t event_mode_fault : 1; ///< Signal Mode Fault event: \ref spi_event_e
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} spi_capabilities_t;
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/**
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\brief Initialize SPI Interface. 1. Initializes the resources needed for the SPI interface 2.registers event callback function
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\param[in] mosi spi pin of mosi
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\param[in] miso spi pin of miso
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\param[in] sclk spi pin of sclk
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\param[in] ssel spi pin of ssel
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\param[in] cb_event event call back function \ref spi_event_cb_t
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\param[in] cb_arg argument for call back function
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\return return spi handle if success
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*/
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spi_handle_t csi_spi_initialize(pin_t mosi, pin_t miso, pin_t sclk, pin_t ssel, spi_event_cb_t cb_event, void *cb_arg);
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/**
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\brief De-initialize SPI Interface. stops operation and releases the software resources used by the interface
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\param[in] handle spi handle to operate.
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\return error code
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*/
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int32_t csi_spi_uninitialize(spi_handle_t handle);
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/**
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\brief Get driver capabilities.
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\param[in] handle spi handle to operate.
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\return \ref spi_capabilities_t
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*/
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spi_capabilities_t csi_spi_get_capabilities(spi_handle_t handle);
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/**
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\brief config spi mode.
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\param[in] handle spi handle to operate.
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\param[in] sysclk sysclk for spi module.
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\param[in] baud spi baud rate. if negative, then this attribute not changed
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\param[in] mode \ref spi_mode_e . if negative, then this attribute not changed
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\param[in] format \ref spi_format_e . if negative, then this attribute not changed
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\param[in] order \ref spi_bit_order_e . if negative, then this attribute not changed
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\param[in] ss_mode \ref spi_ss_mode_e . if negative, then this attribute not changed
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\param[in] bit_width spi data bitwidth: (1 ~ SPI_DATAWIDTH_MAX) . if negative, then this attribute not changed
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\return error code
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*/
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int32_t csi_spi_config(spi_handle_t handle,
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int32_t sysclk,
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int32_t baud,
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spi_mode_e mode,
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spi_format_e format,
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spi_bit_order_e order,
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spi_ss_mode_e ss_mode,
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int32_t bit_width);
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/**
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\brief config spi default tx value.
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\param[in] handle spi handle to operate.
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\param[in] value default tx value
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\return error code
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*/
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int32_t csi_spi_set_default_tx_value(spi_handle_t handle, uint32_t value);
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/**
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\brief sending data to SPI transmitter,(received data is ignored).
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if non-blocking mode, this function only start the sending,
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\ref spi_event_e is signaled when operation completes or error happens.
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\ref csi_spi_get_status can indicates operation status.
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if blocking mode, this function return after operation completes or error happens.
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\param[in] handle spi handle to operate.
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\param[in] data Pointer to buffer with data to send to SPI transmitter. data_type is : uint8_t for 1..8 data bits, uint16_t for 9..16 data bits,uint32_t for 17..32 data bits,
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\param[in] num Number of data items to send.
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\param[in] block_mode blocking and non_blocking to selcect
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\return error code
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*/
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int32_t csi_spi_send(spi_handle_t handle, const void *data, uint32_t num, uint8_t block_mode);
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/**
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\brief receiving data from SPI receiver.transmits the default value as specified by csi_spi_set_default_tx_value
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if non-blocking mode, this function only start the receiving,
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\ref spi_event_e is signaled when operation completes or error happens.
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\ref csi_spi_get_status can indicates operation status.
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if blocking mode, this function return after operation completes or error happens.
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\param[in] handle spi handle to operate.
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\param[out] data Pointer to buffer for data to receive from SPI receiver
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\param[in] num Number of data items to receive
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\param[in] block_mode blocking and non_blocking to selcect
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\return error code
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*/
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int32_t csi_spi_receive(spi_handle_t handle, void *data, uint32_t num, uint8_t block_mode);
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/**
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\brief sending/receiving data to/from SPI transmitter/receiver.
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if non-blocking mode, this function only start the transfer,
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\ref spi_event_e is signaled when operation completes or error happens.
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\ref csi_spi_get_status can indicates operation status.
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if blocking mode, this function return after operation completes or error happens.
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\param[in] handle spi handle to operate.
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\param[in] data_out Pointer to buffer with data to send to SPI transmitter
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\param[out] data_in Pointer to buffer for data to receive from SPI receiver
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\param[in] num_out Number of data items to send
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\param[in] num_in Number of data items to receive
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\param[in] block_mode blocking and non_blocking to selcect
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\return error code
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*/
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int32_t csi_spi_transfer(spi_handle_t handle, const void *data_out, void *data_in, uint32_t num_out, uint32_t num_in, uint8_t block_mode);
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/**
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\brief abort spi transfer.
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\param[in] handle spi handle to operate.
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\return error code
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*/
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int32_t csi_spi_abort_transfer(spi_handle_t handle);
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/**
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\brief Get SPI status.
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\param[in] handle spi handle to operate.
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\return SPI status \ref spi_status_t
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*/
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spi_status_t csi_spi_get_status(spi_handle_t handle);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _CSI_SPI_H_ */
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