2 * Copyright (c) 2013-2017 ARM Limited. All rights reserved.
4 * SPDX-License-Identifier: Apache-2.0
6 * Licensed under the Apache License, Version 2.0 (the License); you may
7 * not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
14 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
21 * Project: SPI (Serial Peripheral Interface) Driver definitions
26 * ARM_SPI_STATUS made volatile
28 * Renamed status flag "tx_rx_busy" to "busy"
30 * New simplified driver:
31 * complexity moved to upper layer (especially data handling)
32 * more unified API for different communication interfaces
36 * Configurable number of data bits
37 * Support for TI Mode and Microwire
38 * Changed prefix ARM_DRV -> ARM_DRIVER
40 * Namespace prefix ARM_ added
42 * Added "send_done_event" to Capabilities
55 #include "Driver_Common.h"
57 #define ARM_SPI_API_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(2,2) /* API version */
60 /****** SPI Control Codes *****/
62 #define ARM_SPI_CONTROL_Pos 0
63 #define ARM_SPI_CONTROL_Msk (0xFFUL << ARM_SPI_CONTROL_Pos)
65 /*----- SPI Control Codes: Mode -----*/
66 #define ARM_SPI_MODE_INACTIVE (0x00UL << ARM_SPI_CONTROL_Pos) ///< SPI Inactive
67 #define ARM_SPI_MODE_MASTER (0x01UL << ARM_SPI_CONTROL_Pos) ///< SPI Master (Output on MOSI, Input on MISO); arg = Bus Speed in bps
68 #define ARM_SPI_MODE_SLAVE (0x02UL << ARM_SPI_CONTROL_Pos) ///< SPI Slave (Output on MISO, Input on MOSI)
69 #define ARM_SPI_MODE_MASTER_SIMPLEX (0x03UL << ARM_SPI_CONTROL_Pos) ///< SPI Master (Output/Input on MOSI); arg = Bus Speed in bps
70 #define ARM_SPI_MODE_SLAVE_SIMPLEX (0x04UL << ARM_SPI_CONTROL_Pos) ///< SPI Slave (Output/Input on MISO)
72 /*----- SPI Control Codes: Mode Parameters: Frame Format -----*/
73 #define ARM_SPI_FRAME_FORMAT_Pos 8
74 #define ARM_SPI_FRAME_FORMAT_Msk (7UL << ARM_SPI_FRAME_FORMAT_Pos)
75 #define ARM_SPI_CPOL0_CPHA0 (0UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 0, Clock Phase 0 (default)
76 #define ARM_SPI_CPOL0_CPHA1 (1UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 0, Clock Phase 1
77 #define ARM_SPI_CPOL1_CPHA0 (2UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 1, Clock Phase 0
78 #define ARM_SPI_CPOL1_CPHA1 (3UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Clock Polarity 1, Clock Phase 1
79 #define ARM_SPI_TI_SSI (4UL << ARM_SPI_FRAME_FORMAT_Pos) ///< Texas Instruments Frame Format
80 #define ARM_SPI_MICROWIRE (5UL << ARM_SPI_FRAME_FORMAT_Pos) ///< National Microwire Frame Format
82 /*----- SPI Control Codes: Mode Parameters: Data Bits -----*/
83 #define ARM_SPI_DATA_BITS_Pos 12
84 #define ARM_SPI_DATA_BITS_Msk (0x3FUL << ARM_SPI_DATA_BITS_Pos)
85 #define ARM_SPI_DATA_BITS(n) (((n) & 0x3F) << ARM_SPI_DATA_BITS_Pos) ///< Number of Data bits
87 /*----- SPI Control Codes: Mode Parameters: Bit Order -----*/
88 #define ARM_SPI_BIT_ORDER_Pos 18
89 #define ARM_SPI_BIT_ORDER_Msk (1UL << ARM_SPI_BIT_ORDER_Pos)
90 #define ARM_SPI_MSB_LSB (0UL << ARM_SPI_BIT_ORDER_Pos) ///< SPI Bit order from MSB to LSB (default)
91 #define ARM_SPI_LSB_MSB (1UL << ARM_SPI_BIT_ORDER_Pos) ///< SPI Bit order from LSB to MSB
93 /*----- SPI Control Codes: Mode Parameters: Slave Select Mode -----*/
94 #define ARM_SPI_SS_MASTER_MODE_Pos 19
95 #define ARM_SPI_SS_MASTER_MODE_Msk (3UL << ARM_SPI_SS_MASTER_MODE_Pos)
96 #define ARM_SPI_SS_MASTER_UNUSED (0UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Not used (default)
97 #define ARM_SPI_SS_MASTER_SW (1UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Software controlled
98 #define ARM_SPI_SS_MASTER_HW_OUTPUT (2UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Hardware controlled Output
99 #define ARM_SPI_SS_MASTER_HW_INPUT (3UL << ARM_SPI_SS_MASTER_MODE_Pos) ///< SPI Slave Select when Master: Hardware monitored Input
100 #define ARM_SPI_SS_SLAVE_MODE_Pos 21
101 #define ARM_SPI_SS_SLAVE_MODE_Msk (1UL << ARM_SPI_SS_SLAVE_MODE_Pos)
102 #define ARM_SPI_SS_SLAVE_HW (0UL << ARM_SPI_SS_SLAVE_MODE_Pos) ///< SPI Slave Select when Slave: Hardware monitored (default)
103 #define ARM_SPI_SS_SLAVE_SW (1UL << ARM_SPI_SS_SLAVE_MODE_Pos) ///< SPI Slave Select when Slave: Software controlled
106 /*----- SPI Control Codes: Miscellaneous Controls -----*/
107 #define ARM_SPI_SET_BUS_SPEED (0x10UL << ARM_SPI_CONTROL_Pos) ///< Set Bus Speed in bps; arg = value
108 #define ARM_SPI_GET_BUS_SPEED (0x11UL << ARM_SPI_CONTROL_Pos) ///< Get Bus Speed in bps
109 #define ARM_SPI_SET_DEFAULT_TX_VALUE (0x12UL << ARM_SPI_CONTROL_Pos) ///< Set default Transmit value; arg = value
110 #define ARM_SPI_CONTROL_SS (0x13UL << ARM_SPI_CONTROL_Pos) ///< Control Slave Select; arg: 0=inactive, 1=active
111 #define ARM_SPI_ABORT_TRANSFER (0x14UL << ARM_SPI_CONTROL_Pos) ///< Abort current data transfer
114 /****** SPI Slave Select Signal definitions *****/
115 #define ARM_SPI_SS_INACTIVE 0 ///< SPI Slave Select Signal Inactive
116 #define ARM_SPI_SS_ACTIVE 1 ///< SPI Slave Select Signal Active
119 /****** SPI specific error codes *****/
120 #define ARM_SPI_ERROR_MODE (ARM_DRIVER_ERROR_SPECIFIC - 1) ///< Specified Mode not supported
121 #define ARM_SPI_ERROR_FRAME_FORMAT (ARM_DRIVER_ERROR_SPECIFIC - 2) ///< Specified Frame Format not supported
122 #define ARM_SPI_ERROR_DATA_BITS (ARM_DRIVER_ERROR_SPECIFIC - 3) ///< Specified number of Data bits not supported
123 #define ARM_SPI_ERROR_BIT_ORDER (ARM_DRIVER_ERROR_SPECIFIC - 4) ///< Specified Bit order not supported
124 #define ARM_SPI_ERROR_SS_MODE (ARM_DRIVER_ERROR_SPECIFIC - 5) ///< Specified Slave Select Mode not supported
130 typedef volatile struct _ARM_SPI_STATUS {
131 uint32_t busy : 1; ///< Transmitter/Receiver busy flag
132 uint32_t data_lost : 1; ///< Data lost: Receive overflow / Transmit underflow (cleared on start of transfer operation)
133 uint32_t mode_fault : 1; ///< Mode fault detected; optional (cleared on start of transfer operation)
134 uint32_t reserved : 29;
138 /****** SPI Event *****/
139 #define ARM_SPI_EVENT_TRANSFER_COMPLETE (1UL << 0) ///< Data Transfer completed
140 #define ARM_SPI_EVENT_DATA_LOST (1UL << 1) ///< Data lost: Receive overflow / Transmit underflow
141 #define ARM_SPI_EVENT_MODE_FAULT (1UL << 2) ///< Master Mode Fault (SS deactivated when Master)
144 // Function documentation
146 \fn ARM_DRIVER_VERSION ARM_SPI_GetVersion (void)
147 \brief Get driver version.
148 \return \ref ARM_DRIVER_VERSION
150 \fn ARM_SPI_CAPABILITIES ARM_SPI_GetCapabilities (void)
151 \brief Get driver capabilities.
152 \return \ref ARM_SPI_CAPABILITIES
154 \fn int32_t ARM_SPI_Initialize (ARM_SPI_SignalEvent_t cb_event)
155 \brief Initialize SPI Interface.
156 \param[in] cb_event Pointer to \ref ARM_SPI_SignalEvent
157 \return \ref execution_status
159 \fn int32_t ARM_SPI_Uninitialize (void)
160 \brief De-initialize SPI Interface.
161 \return \ref execution_status
163 \fn int32_t ARM_SPI_PowerControl (ARM_POWER_STATE state)
164 \brief Control SPI Interface Power.
165 \param[in] state Power state
166 \return \ref execution_status
168 \fn int32_t ARM_SPI_Send (const void *data, uint32_t num)
169 \brief Start sending data to SPI transmitter.
170 \param[in] data Pointer to buffer with data to send to SPI transmitter
171 \param[in] num Number of data items to send
172 \return \ref execution_status
174 \fn int32_t ARM_SPI_Receive (void *data, uint32_t num)
175 \brief Start receiving data from SPI receiver.
176 \param[out] data Pointer to buffer for data to receive from SPI receiver
177 \param[in] num Number of data items to receive
178 \return \ref execution_status
180 \fn int32_t ARM_SPI_Transfer (const void *data_out,
183 \brief Start sending/receiving data to/from SPI transmitter/receiver.
184 \param[in] data_out Pointer to buffer with data to send to SPI transmitter
185 \param[out] data_in Pointer to buffer for data to receive from SPI receiver
186 \param[in] num Number of data items to transfer
187 \return \ref execution_status
189 \fn uint32_t ARM_SPI_GetDataCount (void)
190 \brief Get transferred data count.
191 \return number of data items transferred
193 \fn int32_t ARM_SPI_Control (uint32_t control, uint32_t arg)
194 \brief Control SPI Interface.
195 \param[in] control Operation
196 \param[in] arg Argument of operation (optional)
197 \return common \ref execution_status and driver specific \ref spi_execution_status
199 \fn ARM_SPI_STATUS ARM_SPI_GetStatus (void)
200 \brief Get SPI status.
201 \return SPI status \ref ARM_SPI_STATUS
203 \fn void ARM_SPI_SignalEvent (uint32_t event)
204 \brief Signal SPI Events.
205 \param[in] event \ref SPI_events notification mask
209 typedef void (*ARM_SPI_SignalEvent_t) (uint32_t event); ///< Pointer to \ref ARM_SPI_SignalEvent : Signal SPI Event.
213 \brief SPI Driver Capabilities.
215 typedef struct _ARM_SPI_CAPABILITIES {
216 uint32_t simplex : 1; ///< supports Simplex Mode (Master and Slave)
217 uint32_t ti_ssi : 1; ///< supports TI Synchronous Serial Interface
218 uint32_t microwire : 1; ///< supports Microwire Interface
219 uint32_t event_mode_fault : 1; ///< Signal Mode Fault event: \ref ARM_SPI_EVENT_MODE_FAULT
220 uint32_t reserved : 28; ///< Reserved (must be zero)
221 } ARM_SPI_CAPABILITIES;
225 \brief Access structure of the SPI Driver.
227 typedef struct _ARM_DRIVER_SPI {
228 ARM_DRIVER_VERSION (*GetVersion) (void); ///< Pointer to \ref ARM_SPI_GetVersion : Get driver version.
229 ARM_SPI_CAPABILITIES (*GetCapabilities) (void); ///< Pointer to \ref ARM_SPI_GetCapabilities : Get driver capabilities.
230 int32_t (*Initialize) (ARM_SPI_SignalEvent_t cb_event); ///< Pointer to \ref ARM_SPI_Initialize : Initialize SPI Interface.
231 int32_t (*Uninitialize) (void); ///< Pointer to \ref ARM_SPI_Uninitialize : De-initialize SPI Interface.
232 int32_t (*PowerControl) (ARM_POWER_STATE state); ///< Pointer to \ref ARM_SPI_PowerControl : Control SPI Interface Power.
233 int32_t (*Send) (const void *data, uint32_t num); ///< Pointer to \ref ARM_SPI_Send : Start sending data to SPI Interface.
234 int32_t (*Receive) ( void *data, uint32_t num); ///< Pointer to \ref ARM_SPI_Receive : Start receiving data from SPI Interface.
235 int32_t (*Transfer) (const void *data_out,
237 uint32_t num); ///< Pointer to \ref ARM_SPI_Transfer : Start sending/receiving data to/from SPI.
238 uint32_t (*GetDataCount) (void); ///< Pointer to \ref ARM_SPI_GetDataCount : Get transferred data count.
239 int32_t (*Control) (uint32_t control, uint32_t arg); ///< Pointer to \ref ARM_SPI_Control : Control SPI Interface.
240 ARM_SPI_STATUS (*GetStatus) (void); ///< Pointer to \ref ARM_SPI_GetStatus : Get SPI status.
241 } const ARM_DRIVER_SPI;
247 #endif /* DRIVER_SPI_H_ */