Kenji Arai / TYBLE16_mbedlized_os5_several_examples_2nd

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   nRF51_Vdd

Fork of TYBLE16_mbedlized_os5_several_examples by Kenji Arai

TYBLE16_os5_BASE/drivers/SPI.h@4:416b3d1e1481, 2019-02-12 (annotated)

Committer:
kenjiArai
Date:
Tue Feb 12 20:58:56 2019 +0000
Revision:
4:416b3d1e1481
mbed-os5 revision up

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 4:416b3d1e1481 1 /* mbed Microcontroller Library
kenjiArai 4:416b3d1e1481 2 * Copyright (c) 2006-2015 ARM Limited
kenjiArai 4:416b3d1e1481 3 *
kenjiArai 4:416b3d1e1481 4 * Licensed under the Apache License, Version 2.0 (the "License");
kenjiArai 4:416b3d1e1481 5 * you may not use this file except in compliance with the License.
kenjiArai 4:416b3d1e1481 6 * You may obtain a copy of the License at
kenjiArai 4:416b3d1e1481 7 *
kenjiArai 4:416b3d1e1481 8 * http://www.apache.org/licenses/LICENSE-2.0
kenjiArai 4:416b3d1e1481 9 *
kenjiArai 4:416b3d1e1481 10 * Unless required by applicable law or agreed to in writing, software
kenjiArai 4:416b3d1e1481 11 * distributed under the License is distributed on an "AS IS" BASIS,
kenjiArai 4:416b3d1e1481 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kenjiArai 4:416b3d1e1481 13 * See the License for the specific language governing permissions and
kenjiArai 4:416b3d1e1481 14 * limitations under the License.
kenjiArai 4:416b3d1e1481 15 */
kenjiArai 4:416b3d1e1481 16 #ifndef MBED_SPI_H
kenjiArai 4:416b3d1e1481 17 #define MBED_SPI_H
kenjiArai 4:416b3d1e1481 18
kenjiArai 4:416b3d1e1481 19 #include "platform/platform.h"
kenjiArai 4:416b3d1e1481 20
kenjiArai 4:416b3d1e1481 21 #if defined (DEVICE_SPI) || defined(DOXYGEN_ONLY)
kenjiArai 4:416b3d1e1481 22
kenjiArai 4:416b3d1e1481 23 #include "platform/PlatformMutex.h"
kenjiArai 4:416b3d1e1481 24 #include "hal/spi_api.h"
kenjiArai 4:416b3d1e1481 25 #include "platform/SingletonPtr.h"
kenjiArai 4:416b3d1e1481 26 #include "platform/NonCopyable.h"
kenjiArai 4:416b3d1e1481 27
kenjiArai 4:416b3d1e1481 28 #if DEVICE_SPI_ASYNCH
kenjiArai 4:416b3d1e1481 29 #include "platform/CThunk.h"
kenjiArai 4:416b3d1e1481 30 #include "hal/dma_api.h"
kenjiArai 4:416b3d1e1481 31 #include "platform/CircularBuffer.h"
kenjiArai 4:416b3d1e1481 32 #include "platform/FunctionPointer.h"
kenjiArai 4:416b3d1e1481 33 #include "platform/Transaction.h"
kenjiArai 4:416b3d1e1481 34 #endif
kenjiArai 4:416b3d1e1481 35
kenjiArai 4:416b3d1e1481 36 namespace mbed {
kenjiArai 4:416b3d1e1481 37 /** \addtogroup drivers */
kenjiArai 4:416b3d1e1481 38
kenjiArai 4:416b3d1e1481 39 /** A SPI Master, used for communicating with SPI slave devices.
kenjiArai 4:416b3d1e1481 40 *
kenjiArai 4:416b3d1e1481 41 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz.
kenjiArai 4:416b3d1e1481 42 *
kenjiArai 4:416b3d1e1481 43 * Most SPI devices will also require Chip Select and Reset signals. These
kenjiArai 4:416b3d1e1481 44 * can be controlled using DigitalOut pins.
kenjiArai 4:416b3d1e1481 45 *
kenjiArai 4:416b3d1e1481 46 * @note Synchronization level: Thread safe
kenjiArai 4:416b3d1e1481 47 *
kenjiArai 4:416b3d1e1481 48 * Example of how to send a byte to a SPI slave and record the response:
kenjiArai 4:416b3d1e1481 49 * @code
kenjiArai 4:416b3d1e1481 50 * #include "mbed.h"
kenjiArai 4:416b3d1e1481 51 *
kenjiArai 4:416b3d1e1481 52 * SPI device(SPI_MOSI, SPI_MISO, SPI_SCLK)
kenjiArai 4:416b3d1e1481 53 *
kenjiArai 4:416b3d1e1481 54 * DigitalOut chip_select(SPI_CS);
kenjiArai 4:416b3d1e1481 55 *
kenjiArai 4:416b3d1e1481 56 * int main() {
kenjiArai 4:416b3d1e1481 57 * device.lock();
kenjiArai 4:416b3d1e1481 58 * chip_select = 0;
kenjiArai 4:416b3d1e1481 59 *
kenjiArai 4:416b3d1e1481 60 * int response = device.write(0xFF);
kenjiArai 4:416b3d1e1481 61 *
kenjiArai 4:416b3d1e1481 62 * chip_select = 1;
kenjiArai 4:416b3d1e1481 63 * device.unlock();
kenjiArai 4:416b3d1e1481 64 * }
kenjiArai 4:416b3d1e1481 65 * @endcode
kenjiArai 4:416b3d1e1481 66 *
kenjiArai 4:416b3d1e1481 67 * Example using hardware Chip Select line:
kenjiArai 4:416b3d1e1481 68 * @code
kenjiArai 4:416b3d1e1481 69 * #include "mbed.h"
kenjiArai 4:416b3d1e1481 70 *
kenjiArai 4:416b3d1e1481 71 * SPI device(SPI_MOSI, SPI_MISO, SPI_SCLK, SPI_CS)
kenjiArai 4:416b3d1e1481 72 *
kenjiArai 4:416b3d1e1481 73 * int main() {
kenjiArai 4:416b3d1e1481 74 * device.lock();
kenjiArai 4:416b3d1e1481 75 * int response = device.write(0xFF);
kenjiArai 4:416b3d1e1481 76 * device.unlock();
kenjiArai 4:416b3d1e1481 77 * }
kenjiArai 4:416b3d1e1481 78 * @endcode
kenjiArai 4:416b3d1e1481 79 * @ingroup drivers
kenjiArai 4:416b3d1e1481 80 */
kenjiArai 4:416b3d1e1481 81 class SPI : private NonCopyable<SPI> {
kenjiArai 4:416b3d1e1481 82
kenjiArai 4:416b3d1e1481 83 public:
kenjiArai 4:416b3d1e1481 84
kenjiArai 4:416b3d1e1481 85 /** Create a SPI master connected to the specified pins.
kenjiArai 4:416b3d1e1481 86 *
kenjiArai 4:416b3d1e1481 87 * @note You can specify mosi or miso as NC if not used.
kenjiArai 4:416b3d1e1481 88 *
kenjiArai 4:416b3d1e1481 89 * @param mosi SPI Master Out, Slave In pin.
kenjiArai 4:416b3d1e1481 90 * @param miso SPI Master In, Slave Out pin.
kenjiArai 4:416b3d1e1481 91 * @param sclk SPI Clock pin.
kenjiArai 4:416b3d1e1481 92 * @param ssel SPI Chip Select pin.
kenjiArai 4:416b3d1e1481 93 */
kenjiArai 4:416b3d1e1481 94 SPI(PinName mosi, PinName miso, PinName sclk, PinName ssel = NC);
kenjiArai 4:416b3d1e1481 95 virtual ~SPI();
kenjiArai 4:416b3d1e1481 96
kenjiArai 4:416b3d1e1481 97 /** Configure the data transmission format.
kenjiArai 4:416b3d1e1481 98 *
kenjiArai 4:416b3d1e1481 99 * @param bits Number of bits per SPI frame (4 - 16).
kenjiArai 4:416b3d1e1481 100 * @param mode Clock polarity and phase mode (0 - 3).
kenjiArai 4:416b3d1e1481 101 *
kenjiArai 4:416b3d1e1481 102 * @code
kenjiArai 4:416b3d1e1481 103 * mode | POL PHA
kenjiArai 4:416b3d1e1481 104 * -----+--------
kenjiArai 4:416b3d1e1481 105 * 0 | 0 0
kenjiArai 4:416b3d1e1481 106 * 1 | 0 1
kenjiArai 4:416b3d1e1481 107 * 2 | 1 0
kenjiArai 4:416b3d1e1481 108 * 3 | 1 1
kenjiArai 4:416b3d1e1481 109 * @endcode
kenjiArai 4:416b3d1e1481 110 */
kenjiArai 4:416b3d1e1481 111 void format(int bits, int mode = 0);
kenjiArai 4:416b3d1e1481 112
kenjiArai 4:416b3d1e1481 113 /** Set the SPI bus clock frequency.
kenjiArai 4:416b3d1e1481 114 *
kenjiArai 4:416b3d1e1481 115 * @param hz Clock frequency in Hz (default = 1MHz).
kenjiArai 4:416b3d1e1481 116 */
kenjiArai 4:416b3d1e1481 117 void frequency(int hz = 1000000);
kenjiArai 4:416b3d1e1481 118
kenjiArai 4:416b3d1e1481 119 /** Write to the SPI Slave and return the response.
kenjiArai 4:416b3d1e1481 120 *
kenjiArai 4:416b3d1e1481 121 * @param value Data to be sent to the SPI slave.
kenjiArai 4:416b3d1e1481 122 *
kenjiArai 4:416b3d1e1481 123 * @return Response from the SPI slave.
kenjiArai 4:416b3d1e1481 124 */
kenjiArai 4:416b3d1e1481 125 virtual int write(int value);
kenjiArai 4:416b3d1e1481 126
kenjiArai 4:416b3d1e1481 127 /** Write to the SPI Slave and obtain the response.
kenjiArai 4:416b3d1e1481 128 *
kenjiArai 4:416b3d1e1481 129 * The total number of bytes sent and received will be the maximum of
kenjiArai 4:416b3d1e1481 130 * tx_length and rx_length. The bytes written will be padded with the
kenjiArai 4:416b3d1e1481 131 * value 0xff.
kenjiArai 4:416b3d1e1481 132 *
kenjiArai 4:416b3d1e1481 133 * @param tx_buffer Pointer to the byte-array of data to write to the device.
kenjiArai 4:416b3d1e1481 134 * @param tx_length Number of bytes to write, may be zero.
kenjiArai 4:416b3d1e1481 135 * @param rx_buffer Pointer to the byte-array of data to read from the device.
kenjiArai 4:416b3d1e1481 136 * @param rx_length Number of bytes to read, may be zero.
kenjiArai 4:416b3d1e1481 137 * @return
kenjiArai 4:416b3d1e1481 138 * The number of bytes written and read from the device. This is
kenjiArai 4:416b3d1e1481 139 * maximum of tx_length and rx_length.
kenjiArai 4:416b3d1e1481 140 */
kenjiArai 4:416b3d1e1481 141 virtual int write(const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length);
kenjiArai 4:416b3d1e1481 142
kenjiArai 4:416b3d1e1481 143 /** Acquire exclusive access to this SPI bus.
kenjiArai 4:416b3d1e1481 144 */
kenjiArai 4:416b3d1e1481 145 virtual void lock(void);
kenjiArai 4:416b3d1e1481 146
kenjiArai 4:416b3d1e1481 147 /** Release exclusive access to this SPI bus.
kenjiArai 4:416b3d1e1481 148 */
kenjiArai 4:416b3d1e1481 149 virtual void unlock(void);
kenjiArai 4:416b3d1e1481 150
kenjiArai 4:416b3d1e1481 151 /** Set default write data.
kenjiArai 4:416b3d1e1481 152 * SPI requires the master to send some data during a read operation.
kenjiArai 4:416b3d1e1481 153 * Different devices may require different default byte values.
kenjiArai 4:416b3d1e1481 154 * For example: A SD Card requires default bytes to be 0xFF.
kenjiArai 4:416b3d1e1481 155 *
kenjiArai 4:416b3d1e1481 156 * @param data Default character to be transmitted during a read operation.
kenjiArai 4:416b3d1e1481 157 */
kenjiArai 4:416b3d1e1481 158 void set_default_write_value(char data);
kenjiArai 4:416b3d1e1481 159
kenjiArai 4:416b3d1e1481 160 #if DEVICE_SPI_ASYNCH
kenjiArai 4:416b3d1e1481 161
kenjiArai 4:416b3d1e1481 162 /** Start non-blocking SPI transfer using 8bit buffers.
kenjiArai 4:416b3d1e1481 163 *
kenjiArai 4:416b3d1e1481 164 * This function locks the deep sleep until any event has occurred.
kenjiArai 4:416b3d1e1481 165 *
kenjiArai 4:416b3d1e1481 166 * @param tx_buffer The TX buffer with data to be transferred. If NULL is passed,
kenjiArai 4:416b3d1e1481 167 * the default SPI value is sent.
kenjiArai 4:416b3d1e1481 168 * @param tx_length The length of TX buffer in bytes.
kenjiArai 4:416b3d1e1481 169 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
kenjiArai 4:416b3d1e1481 170 * received data are ignored.
kenjiArai 4:416b3d1e1481 171 * @param rx_length The length of RX buffer in bytes.
kenjiArai 4:416b3d1e1481 172 * @param callback The event callback function.
kenjiArai 4:416b3d1e1481 173 * @param event The event mask of events to modify. @see spi_api.h for SPI events.
kenjiArai 4:416b3d1e1481 174 *
kenjiArai 4:416b3d1e1481 175 * @return Operation result.
kenjiArai 4:416b3d1e1481 176 * @retval 0 If the transfer has started.
kenjiArai 4:416b3d1e1481 177 * @retval -1 If SPI peripheral is busy.
kenjiArai 4:416b3d1e1481 178 */
kenjiArai 4:416b3d1e1481 179 template<typename Type>
kenjiArai 4:416b3d1e1481 180 int transfer(const Type *tx_buffer, int tx_length, Type *rx_buffer, int rx_length, const event_callback_t &callback, int event = SPI_EVENT_COMPLETE)
kenjiArai 4:416b3d1e1481 181 {
kenjiArai 4:416b3d1e1481 182 if (spi_active(&_spi)) {
kenjiArai 4:416b3d1e1481 183 return queue_transfer(tx_buffer, tx_length, rx_buffer, rx_length, sizeof(Type) * 8, callback, event);
kenjiArai 4:416b3d1e1481 184 }
kenjiArai 4:416b3d1e1481 185 start_transfer(tx_buffer, tx_length, rx_buffer, rx_length, sizeof(Type) * 8, callback, event);
kenjiArai 4:416b3d1e1481 186 return 0;
kenjiArai 4:416b3d1e1481 187 }
kenjiArai 4:416b3d1e1481 188
kenjiArai 4:416b3d1e1481 189 /** Abort the on-going SPI transfer, and continue with transfers in the queue, if any.
kenjiArai 4:416b3d1e1481 190 */
kenjiArai 4:416b3d1e1481 191 void abort_transfer();
kenjiArai 4:416b3d1e1481 192
kenjiArai 4:416b3d1e1481 193 /** Clear the queue of transfers.
kenjiArai 4:416b3d1e1481 194 */
kenjiArai 4:416b3d1e1481 195 void clear_transfer_buffer();
kenjiArai 4:416b3d1e1481 196
kenjiArai 4:416b3d1e1481 197 /** Clear the queue of transfers and abort the on-going transfer.
kenjiArai 4:416b3d1e1481 198 */
kenjiArai 4:416b3d1e1481 199 void abort_all_transfers();
kenjiArai 4:416b3d1e1481 200
kenjiArai 4:416b3d1e1481 201 /** Configure DMA usage suggestion for non-blocking transfers.
kenjiArai 4:416b3d1e1481 202 *
kenjiArai 4:416b3d1e1481 203 * @param usage The usage DMA hint for peripheral.
kenjiArai 4:416b3d1e1481 204 *
kenjiArai 4:416b3d1e1481 205 * @return Result of the operation.
kenjiArai 4:416b3d1e1481 206 * @retval 0 The usage was set.
kenjiArai 4:416b3d1e1481 207 * @retval -1 Usage cannot be set as there is an ongoing transaction.
kenjiArai 4:416b3d1e1481 208 */
kenjiArai 4:416b3d1e1481 209 int set_dma_usage(DMAUsage usage);
kenjiArai 4:416b3d1e1481 210
kenjiArai 4:416b3d1e1481 211 protected:
kenjiArai 4:416b3d1e1481 212 /** SPI interrupt handler.
kenjiArai 4:416b3d1e1481 213 */
kenjiArai 4:416b3d1e1481 214 void irq_handler_asynch(void);
kenjiArai 4:416b3d1e1481 215
kenjiArai 4:416b3d1e1481 216 /** Start the transfer or put it on the queue.
kenjiArai 4:416b3d1e1481 217 *
kenjiArai 4:416b3d1e1481 218 * @param tx_buffer The TX buffer with data to be transferred. If NULL is passed,
kenjiArai 4:416b3d1e1481 219 * the default SPI value is sent
kenjiArai 4:416b3d1e1481 220 * @param tx_length The length of TX buffer in bytes.
kenjiArai 4:416b3d1e1481 221 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
kenjiArai 4:416b3d1e1481 222 * received data are ignored.
kenjiArai 4:416b3d1e1481 223 * @param rx_length The length of RX buffer in bytes.
kenjiArai 4:416b3d1e1481 224 * @param bit_width The buffers element width in bits.
kenjiArai 4:416b3d1e1481 225 * @param callback The event callback function.
kenjiArai 4:416b3d1e1481 226 * @param event The event mask of events to modify.
kenjiArai 4:416b3d1e1481 227 *
kenjiArai 4:416b3d1e1481 228 * @return Operation success.
kenjiArai 4:416b3d1e1481 229 * @retval 0 A transfer was started or added to the queue.
kenjiArai 4:416b3d1e1481 230 * @retval -1 Transfer can't be added because queue is full.
kenjiArai 4:416b3d1e1481 231 */
kenjiArai 4:416b3d1e1481 232 int transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t &callback, int event);
kenjiArai 4:416b3d1e1481 233
kenjiArai 4:416b3d1e1481 234 /** Put a transfer on the transfer queue.
kenjiArai 4:416b3d1e1481 235 *
kenjiArai 4:416b3d1e1481 236 * @param tx_buffer The TX buffer with data to be transferred. If NULL is passed,
kenjiArai 4:416b3d1e1481 237 * the default SPI value is sent.
kenjiArai 4:416b3d1e1481 238 * @param tx_length The length of TX buffer in bytes.
kenjiArai 4:416b3d1e1481 239 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
kenjiArai 4:416b3d1e1481 240 * received data are ignored.
kenjiArai 4:416b3d1e1481 241 * @param rx_length The length of RX buffer in bytes.
kenjiArai 4:416b3d1e1481 242 * @param bit_width The buffers element width in bits.
kenjiArai 4:416b3d1e1481 243 * @param callback The event callback function.
kenjiArai 4:416b3d1e1481 244 * @param event The event mask of events to modify.
kenjiArai 4:416b3d1e1481 245 *
kenjiArai 4:416b3d1e1481 246 * @return Operation success.
kenjiArai 4:416b3d1e1481 247 * @retval 0 A transfer was added to the queue.
kenjiArai 4:416b3d1e1481 248 * @retval -1 Transfer can't be added because queue is full.
kenjiArai 4:416b3d1e1481 249 */
kenjiArai 4:416b3d1e1481 250 int queue_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t &callback, int event);
kenjiArai 4:416b3d1e1481 251
kenjiArai 4:416b3d1e1481 252 /** Configure a callback, SPI peripheral, and initiate a new transfer.
kenjiArai 4:416b3d1e1481 253 *
kenjiArai 4:416b3d1e1481 254 * @param tx_buffer The TX buffer with data to be transferred. If NULL is passed,
kenjiArai 4:416b3d1e1481 255 * the default SPI value is sent.
kenjiArai 4:416b3d1e1481 256 * @param tx_length The length of TX buffer in bytes.
kenjiArai 4:416b3d1e1481 257 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
kenjiArai 4:416b3d1e1481 258 * received data are ignored.
kenjiArai 4:416b3d1e1481 259 * @param rx_length The length of RX buffer in bytes.
kenjiArai 4:416b3d1e1481 260 * @param bit_width The buffers element width.
kenjiArai 4:416b3d1e1481 261 * @param callback The event callback function.
kenjiArai 4:416b3d1e1481 262 * @param event The event mask of events to modify.
kenjiArai 4:416b3d1e1481 263 */
kenjiArai 4:416b3d1e1481 264 void start_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t &callback, int event);
kenjiArai 4:416b3d1e1481 265
kenjiArai 4:416b3d1e1481 266 #if !defined(DOXYGEN_ONLY)
kenjiArai 4:416b3d1e1481 267
kenjiArai 4:416b3d1e1481 268 private:
kenjiArai 4:416b3d1e1481 269 /** Lock deep sleep only if it is not yet locked */
kenjiArai 4:416b3d1e1481 270 void lock_deep_sleep();
kenjiArai 4:416b3d1e1481 271
kenjiArai 4:416b3d1e1481 272 /** Unlock deep sleep in case it is locked */
kenjiArai 4:416b3d1e1481 273 void unlock_deep_sleep();
kenjiArai 4:416b3d1e1481 274
kenjiArai 4:416b3d1e1481 275
kenjiArai 4:416b3d1e1481 276 #if TRANSACTION_QUEUE_SIZE_SPI
kenjiArai 4:416b3d1e1481 277
kenjiArai 4:416b3d1e1481 278 /** Start a new transaction.
kenjiArai 4:416b3d1e1481 279 *
kenjiArai 4:416b3d1e1481 280 * @param data Transaction data.
kenjiArai 4:416b3d1e1481 281 */
kenjiArai 4:416b3d1e1481 282 void start_transaction(transaction_t *data);
kenjiArai 4:416b3d1e1481 283
kenjiArai 4:416b3d1e1481 284 /** Dequeue a transaction and start the transfer if there was one pending.
kenjiArai 4:416b3d1e1481 285 */
kenjiArai 4:416b3d1e1481 286 void dequeue_transaction();
kenjiArai 4:416b3d1e1481 287
kenjiArai 4:416b3d1e1481 288 /* Queue of pending transfers */
kenjiArai 4:416b3d1e1481 289 static CircularBuffer<Transaction<SPI>, TRANSACTION_QUEUE_SIZE_SPI> _transaction_buffer;
kenjiArai 4:416b3d1e1481 290 #endif
kenjiArai 4:416b3d1e1481 291
kenjiArai 4:416b3d1e1481 292 #endif //!defined(DOXYGEN_ONLY)
kenjiArai 4:416b3d1e1481 293
kenjiArai 4:416b3d1e1481 294 #endif //DEVICE_SPI_ASYNCH
kenjiArai 4:416b3d1e1481 295
kenjiArai 4:416b3d1e1481 296 #if !defined(DOXYGEN_ONLY)
kenjiArai 4:416b3d1e1481 297
kenjiArai 4:416b3d1e1481 298 protected:
kenjiArai 4:416b3d1e1481 299 /* Internal SPI object identifying the resources */
kenjiArai 4:416b3d1e1481 300 spi_t _spi;
kenjiArai 4:416b3d1e1481 301
kenjiArai 4:416b3d1e1481 302 #if DEVICE_SPI_ASYNCH
kenjiArai 4:416b3d1e1481 303 /* Interrupt */
kenjiArai 4:416b3d1e1481 304 CThunk<SPI> _irq;
kenjiArai 4:416b3d1e1481 305 /* Interrupt handler callback */
kenjiArai 4:416b3d1e1481 306 event_callback_t _callback;
kenjiArai 4:416b3d1e1481 307 /* Current preferred DMA mode @see dma_api.h */
kenjiArai 4:416b3d1e1481 308 DMAUsage _usage;
kenjiArai 4:416b3d1e1481 309 /* Current sate of the sleep manager */
kenjiArai 4:416b3d1e1481 310 bool _deep_sleep_locked;
kenjiArai 4:416b3d1e1481 311 #endif
kenjiArai 4:416b3d1e1481 312
kenjiArai 4:416b3d1e1481 313 /* Take over the physical SPI and apply our settings (thread safe) */
kenjiArai 4:416b3d1e1481 314 void aquire(void);
kenjiArai 4:416b3d1e1481 315 /* Current user of the SPI */
kenjiArai 4:416b3d1e1481 316 static SPI *_owner;
kenjiArai 4:416b3d1e1481 317 /* Used by lock and unlock for thread safety */
kenjiArai 4:416b3d1e1481 318 static SingletonPtr<PlatformMutex> _mutex;
kenjiArai 4:416b3d1e1481 319 /* Size of the SPI frame */
kenjiArai 4:416b3d1e1481 320 int _bits;
kenjiArai 4:416b3d1e1481 321 /* Clock polairy and phase */
kenjiArai 4:416b3d1e1481 322 int _mode;
kenjiArai 4:416b3d1e1481 323 /* Clock frequency */
kenjiArai 4:416b3d1e1481 324 int _hz;
kenjiArai 4:416b3d1e1481 325 /* Default character used for NULL transfers */
kenjiArai 4:416b3d1e1481 326 char _write_fill;
kenjiArai 4:416b3d1e1481 327
kenjiArai 4:416b3d1e1481 328 private:
kenjiArai 4:416b3d1e1481 329 /** Private acquire function without locking/unlocking.
kenjiArai 4:416b3d1e1481 330 * Implemented in order to avoid duplicate locking and boost performance.
kenjiArai 4:416b3d1e1481 331 */
kenjiArai 4:416b3d1e1481 332 void _acquire(void);
kenjiArai 4:416b3d1e1481 333
kenjiArai 4:416b3d1e1481 334 #endif //!defined(DOXYGEN_ONLY)
kenjiArai 4:416b3d1e1481 335 };
kenjiArai 4:416b3d1e1481 336
kenjiArai 4:416b3d1e1481 337 } // namespace mbed
kenjiArai 4:416b3d1e1481 338
kenjiArai 4:416b3d1e1481 339 #endif
kenjiArai 4:416b3d1e1481 340
kenjiArai 4:416b3d1e1481 341 #endif