Nathan Yonkee / Mbed 2 deprecated Nucleo_sinewave_output_copy

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Dependencies:   mbed

mbed-os/drivers/SPI.h@9:d58e77ebd769, 2018-03-02 (annotated)

Committer:
Nathan Yonkee
Date:
Fri Mar 02 07:12:37 2018 -0700
Revision:
9:d58e77ebd769
add mbed-os library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Nathan Yonkee 9:d58e77ebd769 1 /* mbed Microcontroller Library
Nathan Yonkee 9:d58e77ebd769 2 * Copyright (c) 2006-2015 ARM Limited
Nathan Yonkee 9:d58e77ebd769 3 *
Nathan Yonkee 9:d58e77ebd769 4 * Licensed under the Apache License, Version 2.0 (the "License");
Nathan Yonkee 9:d58e77ebd769 5 * you may not use this file except in compliance with the License.
Nathan Yonkee 9:d58e77ebd769 6 * You may obtain a copy of the License at
Nathan Yonkee 9:d58e77ebd769 7 *
Nathan Yonkee 9:d58e77ebd769 8 * http://www.apache.org/licenses/LICENSE-2.0
Nathan Yonkee 9:d58e77ebd769 9 *
Nathan Yonkee 9:d58e77ebd769 10 * Unless required by applicable law or agreed to in writing, software
Nathan Yonkee 9:d58e77ebd769 11 * distributed under the License is distributed on an "AS IS" BASIS,
Nathan Yonkee 9:d58e77ebd769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Nathan Yonkee 9:d58e77ebd769 13 * See the License for the specific language governing permissions and
Nathan Yonkee 9:d58e77ebd769 14 * limitations under the License.
Nathan Yonkee 9:d58e77ebd769 15 */
Nathan Yonkee 9:d58e77ebd769 16 #ifndef MBED_SPI_H
Nathan Yonkee 9:d58e77ebd769 17 #define MBED_SPI_H
Nathan Yonkee 9:d58e77ebd769 18
Nathan Yonkee 9:d58e77ebd769 19 #include "platform/platform.h"
Nathan Yonkee 9:d58e77ebd769 20
Nathan Yonkee 9:d58e77ebd769 21 #if defined (DEVICE_SPI) || defined(DOXYGEN_ONLY)
Nathan Yonkee 9:d58e77ebd769 22
Nathan Yonkee 9:d58e77ebd769 23 #include "platform/PlatformMutex.h"
Nathan Yonkee 9:d58e77ebd769 24 #include "hal/spi_api.h"
Nathan Yonkee 9:d58e77ebd769 25 #include "platform/SingletonPtr.h"
Nathan Yonkee 9:d58e77ebd769 26 #include "platform/NonCopyable.h"
Nathan Yonkee 9:d58e77ebd769 27
Nathan Yonkee 9:d58e77ebd769 28 #if DEVICE_SPI_ASYNCH
Nathan Yonkee 9:d58e77ebd769 29 #include "platform/CThunk.h"
Nathan Yonkee 9:d58e77ebd769 30 #include "hal/dma_api.h"
Nathan Yonkee 9:d58e77ebd769 31 #include "platform/CircularBuffer.h"
Nathan Yonkee 9:d58e77ebd769 32 #include "platform/FunctionPointer.h"
Nathan Yonkee 9:d58e77ebd769 33 #include "platform/Transaction.h"
Nathan Yonkee 9:d58e77ebd769 34 #endif
Nathan Yonkee 9:d58e77ebd769 35
Nathan Yonkee 9:d58e77ebd769 36 namespace mbed {
Nathan Yonkee 9:d58e77ebd769 37 /** \addtogroup drivers */
Nathan Yonkee 9:d58e77ebd769 38
Nathan Yonkee 9:d58e77ebd769 39 /** A SPI Master, used for communicating with SPI slave devices
Nathan Yonkee 9:d58e77ebd769 40 *
Nathan Yonkee 9:d58e77ebd769 41 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz
Nathan Yonkee 9:d58e77ebd769 42 *
Nathan Yonkee 9:d58e77ebd769 43 * Most SPI devices will also require Chip Select and Reset signals. These
Nathan Yonkee 9:d58e77ebd769 44 * can be controlled using DigitalOut pins
Nathan Yonkee 9:d58e77ebd769 45 *
Nathan Yonkee 9:d58e77ebd769 46 * @note Synchronization level: Thread safe
Nathan Yonkee 9:d58e77ebd769 47 *
Nathan Yonkee 9:d58e77ebd769 48 * Example:
Nathan Yonkee 9:d58e77ebd769 49 * @code
Nathan Yonkee 9:d58e77ebd769 50 * // Send a byte to a SPI slave, and record the response
Nathan Yonkee 9:d58e77ebd769 51 *
Nathan Yonkee 9:d58e77ebd769 52 * #include "mbed.h"
Nathan Yonkee 9:d58e77ebd769 53 *
Nathan Yonkee 9:d58e77ebd769 54 * // hardware ssel (where applicable)
Nathan Yonkee 9:d58e77ebd769 55 * //SPI device(p5, p6, p7, p8); // mosi, miso, sclk, ssel
Nathan Yonkee 9:d58e77ebd769 56 *
Nathan Yonkee 9:d58e77ebd769 57 * // software ssel
Nathan Yonkee 9:d58e77ebd769 58 * SPI device(p5, p6, p7); // mosi, miso, sclk
Nathan Yonkee 9:d58e77ebd769 59 * DigitalOut cs(p8); // ssel
Nathan Yonkee 9:d58e77ebd769 60 *
Nathan Yonkee 9:d58e77ebd769 61 * int main() {
Nathan Yonkee 9:d58e77ebd769 62 * // hardware ssel (where applicable)
Nathan Yonkee 9:d58e77ebd769 63 * //int response = device.write(0xFF);
Nathan Yonkee 9:d58e77ebd769 64 *
Nathan Yonkee 9:d58e77ebd769 65 * device.lock();
Nathan Yonkee 9:d58e77ebd769 66 * // software ssel
Nathan Yonkee 9:d58e77ebd769 67 * cs = 0;
Nathan Yonkee 9:d58e77ebd769 68 * int response = device.write(0xFF);
Nathan Yonkee 9:d58e77ebd769 69 * cs = 1;
Nathan Yonkee 9:d58e77ebd769 70 * device.unlock();
Nathan Yonkee 9:d58e77ebd769 71 *
Nathan Yonkee 9:d58e77ebd769 72 * }
Nathan Yonkee 9:d58e77ebd769 73 * @endcode
Nathan Yonkee 9:d58e77ebd769 74 * @ingroup drivers
Nathan Yonkee 9:d58e77ebd769 75 */
Nathan Yonkee 9:d58e77ebd769 76 class SPI : private NonCopyable<SPI> {
Nathan Yonkee 9:d58e77ebd769 77
Nathan Yonkee 9:d58e77ebd769 78 public:
Nathan Yonkee 9:d58e77ebd769 79
Nathan Yonkee 9:d58e77ebd769 80 /** Create a SPI master connected to the specified pins
Nathan Yonkee 9:d58e77ebd769 81 *
Nathan Yonkee 9:d58e77ebd769 82 * mosi or miso can be specfied as NC if not used
Nathan Yonkee 9:d58e77ebd769 83 *
Nathan Yonkee 9:d58e77ebd769 84 * @param mosi SPI Master Out, Slave In pin
Nathan Yonkee 9:d58e77ebd769 85 * @param miso SPI Master In, Slave Out pin
Nathan Yonkee 9:d58e77ebd769 86 * @param sclk SPI Clock pin
Nathan Yonkee 9:d58e77ebd769 87 * @param ssel SPI chip select pin
Nathan Yonkee 9:d58e77ebd769 88 */
Nathan Yonkee 9:d58e77ebd769 89 SPI(PinName mosi, PinName miso, PinName sclk, PinName ssel=NC);
Nathan Yonkee 9:d58e77ebd769 90
Nathan Yonkee 9:d58e77ebd769 91 /** Configure the data transmission format
Nathan Yonkee 9:d58e77ebd769 92 *
Nathan Yonkee 9:d58e77ebd769 93 * @param bits Number of bits per SPI frame (4 - 16)
Nathan Yonkee 9:d58e77ebd769 94 * @param mode Clock polarity and phase mode (0 - 3)
Nathan Yonkee 9:d58e77ebd769 95 *
Nathan Yonkee 9:d58e77ebd769 96 * @code
Nathan Yonkee 9:d58e77ebd769 97 * mode | POL PHA
Nathan Yonkee 9:d58e77ebd769 98 * -----+--------
Nathan Yonkee 9:d58e77ebd769 99 * 0 | 0 0
Nathan Yonkee 9:d58e77ebd769 100 * 1 | 0 1
Nathan Yonkee 9:d58e77ebd769 101 * 2 | 1 0
Nathan Yonkee 9:d58e77ebd769 102 * 3 | 1 1
Nathan Yonkee 9:d58e77ebd769 103 * @endcode
Nathan Yonkee 9:d58e77ebd769 104 */
Nathan Yonkee 9:d58e77ebd769 105 void format(int bits, int mode = 0);
Nathan Yonkee 9:d58e77ebd769 106
Nathan Yonkee 9:d58e77ebd769 107 /** Set the spi bus clock frequency
Nathan Yonkee 9:d58e77ebd769 108 *
Nathan Yonkee 9:d58e77ebd769 109 * @param hz SCLK frequency in hz (default = 1MHz)
Nathan Yonkee 9:d58e77ebd769 110 */
Nathan Yonkee 9:d58e77ebd769 111 void frequency(int hz = 1000000);
Nathan Yonkee 9:d58e77ebd769 112
Nathan Yonkee 9:d58e77ebd769 113 /** Write to the SPI Slave and return the response
Nathan Yonkee 9:d58e77ebd769 114 *
Nathan Yonkee 9:d58e77ebd769 115 * @param value Data to be sent to the SPI slave
Nathan Yonkee 9:d58e77ebd769 116 *
Nathan Yonkee 9:d58e77ebd769 117 * @returns
Nathan Yonkee 9:d58e77ebd769 118 * Response from the SPI slave
Nathan Yonkee 9:d58e77ebd769 119 */
Nathan Yonkee 9:d58e77ebd769 120 virtual int write(int value);
Nathan Yonkee 9:d58e77ebd769 121
Nathan Yonkee 9:d58e77ebd769 122 /** Write to the SPI Slave and obtain the response
Nathan Yonkee 9:d58e77ebd769 123 *
Nathan Yonkee 9:d58e77ebd769 124 * The total number of bytes sent and recieved will be the maximum of
Nathan Yonkee 9:d58e77ebd769 125 * tx_length and rx_length. The bytes written will be padded with the
Nathan Yonkee 9:d58e77ebd769 126 * value 0xff.
Nathan Yonkee 9:d58e77ebd769 127 *
Nathan Yonkee 9:d58e77ebd769 128 * @param tx_buffer Pointer to the byte-array of data to write to the device
Nathan Yonkee 9:d58e77ebd769 129 * @param tx_length Number of bytes to write, may be zero
Nathan Yonkee 9:d58e77ebd769 130 * @param rx_buffer Pointer to the byte-array of data to read from the device
Nathan Yonkee 9:d58e77ebd769 131 * @param rx_length Number of bytes to read, may be zero
Nathan Yonkee 9:d58e77ebd769 132 * @returns
Nathan Yonkee 9:d58e77ebd769 133 * The number of bytes written and read from the device. This is
Nathan Yonkee 9:d58e77ebd769 134 * maximum of tx_length and rx_length.
Nathan Yonkee 9:d58e77ebd769 135 */
Nathan Yonkee 9:d58e77ebd769 136 virtual int write(const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length);
Nathan Yonkee 9:d58e77ebd769 137
Nathan Yonkee 9:d58e77ebd769 138 /** Acquire exclusive access to this SPI bus
Nathan Yonkee 9:d58e77ebd769 139 */
Nathan Yonkee 9:d58e77ebd769 140 virtual void lock(void);
Nathan Yonkee 9:d58e77ebd769 141
Nathan Yonkee 9:d58e77ebd769 142 /** Release exclusive access to this SPI bus
Nathan Yonkee 9:d58e77ebd769 143 */
Nathan Yonkee 9:d58e77ebd769 144 virtual void unlock(void);
Nathan Yonkee 9:d58e77ebd769 145
Nathan Yonkee 9:d58e77ebd769 146 /** Set default write data
Nathan Yonkee 9:d58e77ebd769 147 * SPI requires the master to send some data during a read operation.
Nathan Yonkee 9:d58e77ebd769 148 * Different devices may require different default byte values.
Nathan Yonkee 9:d58e77ebd769 149 * For example: A SD Card requires default bytes to be 0xFF.
Nathan Yonkee 9:d58e77ebd769 150 *
Nathan Yonkee 9:d58e77ebd769 151 * @param data Default character to be transmitted while read operation
Nathan Yonkee 9:d58e77ebd769 152 */
Nathan Yonkee 9:d58e77ebd769 153 void set_default_write_value(char data);
Nathan Yonkee 9:d58e77ebd769 154
Nathan Yonkee 9:d58e77ebd769 155 #if DEVICE_SPI_ASYNCH
Nathan Yonkee 9:d58e77ebd769 156
Nathan Yonkee 9:d58e77ebd769 157 /** Start non-blocking SPI transfer using 8bit buffers.
Nathan Yonkee 9:d58e77ebd769 158 *
Nathan Yonkee 9:d58e77ebd769 159 * This function locks the deep sleep until any event has occured
Nathan Yonkee 9:d58e77ebd769 160 *
Nathan Yonkee 9:d58e77ebd769 161 * @param tx_buffer The TX buffer with data to be transfered. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 162 * the default SPI value is sent
Nathan Yonkee 9:d58e77ebd769 163 * @param tx_length The length of TX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 164 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 165 * received data are ignored
Nathan Yonkee 9:d58e77ebd769 166 * @param rx_length The length of RX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 167 * @param callback The event callback function
Nathan Yonkee 9:d58e77ebd769 168 * @param event The logical OR of events to modify. Look at spi hal header file for SPI events.
Nathan Yonkee 9:d58e77ebd769 169 * @return Zero if the transfer has started, or -1 if SPI peripheral is busy
Nathan Yonkee 9:d58e77ebd769 170 */
Nathan Yonkee 9:d58e77ebd769 171 template<typename Type>
Nathan Yonkee 9:d58e77ebd769 172 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) {
Nathan Yonkee 9:d58e77ebd769 173 if (spi_active(&_spi)) {
Nathan Yonkee 9:d58e77ebd769 174 return queue_transfer(tx_buffer, tx_length, rx_buffer, rx_length, sizeof(Type)*8, callback, event);
Nathan Yonkee 9:d58e77ebd769 175 }
Nathan Yonkee 9:d58e77ebd769 176 start_transfer(tx_buffer, tx_length, rx_buffer, rx_length, sizeof(Type)*8, callback, event);
Nathan Yonkee 9:d58e77ebd769 177 return 0;
Nathan Yonkee 9:d58e77ebd769 178 }
Nathan Yonkee 9:d58e77ebd769 179
Nathan Yonkee 9:d58e77ebd769 180 /** Abort the on-going SPI transfer, and continue with transfer's in the queue if any.
Nathan Yonkee 9:d58e77ebd769 181 */
Nathan Yonkee 9:d58e77ebd769 182 void abort_transfer();
Nathan Yonkee 9:d58e77ebd769 183
Nathan Yonkee 9:d58e77ebd769 184 /** Clear the transaction buffer
Nathan Yonkee 9:d58e77ebd769 185 */
Nathan Yonkee 9:d58e77ebd769 186 void clear_transfer_buffer();
Nathan Yonkee 9:d58e77ebd769 187
Nathan Yonkee 9:d58e77ebd769 188 /** Clear the transaction buffer and abort on-going transfer.
Nathan Yonkee 9:d58e77ebd769 189 */
Nathan Yonkee 9:d58e77ebd769 190 void abort_all_transfers();
Nathan Yonkee 9:d58e77ebd769 191
Nathan Yonkee 9:d58e77ebd769 192 /** Configure DMA usage suggestion for non-blocking transfers
Nathan Yonkee 9:d58e77ebd769 193 *
Nathan Yonkee 9:d58e77ebd769 194 * @param usage The usage DMA hint for peripheral
Nathan Yonkee 9:d58e77ebd769 195 * @return Zero if the usage was set, -1 if a transaction is on-going
Nathan Yonkee 9:d58e77ebd769 196 */
Nathan Yonkee 9:d58e77ebd769 197 int set_dma_usage(DMAUsage usage);
Nathan Yonkee 9:d58e77ebd769 198
Nathan Yonkee 9:d58e77ebd769 199 protected:
Nathan Yonkee 9:d58e77ebd769 200 /** SPI IRQ handler
Nathan Yonkee 9:d58e77ebd769 201 *
Nathan Yonkee 9:d58e77ebd769 202 */
Nathan Yonkee 9:d58e77ebd769 203 void irq_handler_asynch(void);
Nathan Yonkee 9:d58e77ebd769 204
Nathan Yonkee 9:d58e77ebd769 205 /** Common transfer method
Nathan Yonkee 9:d58e77ebd769 206 *
Nathan Yonkee 9:d58e77ebd769 207 * @param tx_buffer The TX buffer with data to be transfered. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 208 * the default SPI value is sent
Nathan Yonkee 9:d58e77ebd769 209 * @param tx_length The length of TX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 210 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 211 * received data are ignored
Nathan Yonkee 9:d58e77ebd769 212 * @param rx_length The length of RX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 213 * @param bit_width The buffers element width
Nathan Yonkee 9:d58e77ebd769 214 * @param callback The event callback function
Nathan Yonkee 9:d58e77ebd769 215 * @param event The logical OR of events to modify
Nathan Yonkee 9:d58e77ebd769 216 * @return Zero if the transfer has started or was added to the queue, or -1 if SPI peripheral is busy/buffer is full
Nathan Yonkee 9:d58e77ebd769 217 */
Nathan Yonkee 9:d58e77ebd769 218 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);
Nathan Yonkee 9:d58e77ebd769 219
Nathan Yonkee 9:d58e77ebd769 220 /**
Nathan Yonkee 9:d58e77ebd769 221 *
Nathan Yonkee 9:d58e77ebd769 222 * @param tx_buffer The TX buffer with data to be transfered. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 223 * the default SPI value is sent
Nathan Yonkee 9:d58e77ebd769 224 * @param tx_length The length of TX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 225 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 226 * received data are ignored
Nathan Yonkee 9:d58e77ebd769 227 * @param rx_length The length of RX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 228 * @param bit_width The buffers element width
Nathan Yonkee 9:d58e77ebd769 229 * @param callback The event callback function
Nathan Yonkee 9:d58e77ebd769 230 * @param event The logical OR of events to modify
Nathan Yonkee 9:d58e77ebd769 231 * @return Zero if a transfer was added to the queue, or -1 if the queue is full
Nathan Yonkee 9:d58e77ebd769 232 */
Nathan Yonkee 9:d58e77ebd769 233 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);
Nathan Yonkee 9:d58e77ebd769 234
Nathan Yonkee 9:d58e77ebd769 235 /** Configures a callback, spi peripheral and initiate a new transfer
Nathan Yonkee 9:d58e77ebd769 236 *
Nathan Yonkee 9:d58e77ebd769 237 * @param tx_buffer The TX buffer with data to be transfered. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 238 * the default SPI value is sent
Nathan Yonkee 9:d58e77ebd769 239 * @param tx_length The length of TX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 240 * @param rx_buffer The RX buffer which is used for received data. If NULL is passed,
Nathan Yonkee 9:d58e77ebd769 241 * received data are ignored
Nathan Yonkee 9:d58e77ebd769 242 * @param rx_length The length of RX buffer in bytes
Nathan Yonkee 9:d58e77ebd769 243 * @param bit_width The buffers element width
Nathan Yonkee 9:d58e77ebd769 244 * @param callback The event callback function
Nathan Yonkee 9:d58e77ebd769 245 * @param event The logical OR of events to modify
Nathan Yonkee 9:d58e77ebd769 246 */
Nathan Yonkee 9:d58e77ebd769 247 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);
Nathan Yonkee 9:d58e77ebd769 248
Nathan Yonkee 9:d58e77ebd769 249 private:
Nathan Yonkee 9:d58e77ebd769 250 /** Lock deep sleep only if it is not yet locked */
Nathan Yonkee 9:d58e77ebd769 251 void lock_deep_sleep();
Nathan Yonkee 9:d58e77ebd769 252
Nathan Yonkee 9:d58e77ebd769 253 /** Unlock deep sleep in case it is locked */
Nathan Yonkee 9:d58e77ebd769 254 void unlock_deep_sleep();
Nathan Yonkee 9:d58e77ebd769 255
Nathan Yonkee 9:d58e77ebd769 256
Nathan Yonkee 9:d58e77ebd769 257 #if TRANSACTION_QUEUE_SIZE_SPI
Nathan Yonkee 9:d58e77ebd769 258
Nathan Yonkee 9:d58e77ebd769 259 /** Start a new transaction
Nathan Yonkee 9:d58e77ebd769 260 *
Nathan Yonkee 9:d58e77ebd769 261 * @param data Transaction data
Nathan Yonkee 9:d58e77ebd769 262 */
Nathan Yonkee 9:d58e77ebd769 263 void start_transaction(transaction_t *data);
Nathan Yonkee 9:d58e77ebd769 264
Nathan Yonkee 9:d58e77ebd769 265 /** Dequeue a transaction
Nathan Yonkee 9:d58e77ebd769 266 *
Nathan Yonkee 9:d58e77ebd769 267 */
Nathan Yonkee 9:d58e77ebd769 268 void dequeue_transaction();
Nathan Yonkee 9:d58e77ebd769 269 static CircularBuffer<Transaction<SPI>, TRANSACTION_QUEUE_SIZE_SPI> _transaction_buffer;
Nathan Yonkee 9:d58e77ebd769 270 #endif
Nathan Yonkee 9:d58e77ebd769 271
Nathan Yonkee 9:d58e77ebd769 272 #endif
Nathan Yonkee 9:d58e77ebd769 273
Nathan Yonkee 9:d58e77ebd769 274 public:
Nathan Yonkee 9:d58e77ebd769 275 virtual ~SPI() {
Nathan Yonkee 9:d58e77ebd769 276 }
Nathan Yonkee 9:d58e77ebd769 277
Nathan Yonkee 9:d58e77ebd769 278 protected:
Nathan Yonkee 9:d58e77ebd769 279 spi_t _spi;
Nathan Yonkee 9:d58e77ebd769 280
Nathan Yonkee 9:d58e77ebd769 281 #if DEVICE_SPI_ASYNCH
Nathan Yonkee 9:d58e77ebd769 282 CThunk<SPI> _irq;
Nathan Yonkee 9:d58e77ebd769 283 event_callback_t _callback;
Nathan Yonkee 9:d58e77ebd769 284 DMAUsage _usage;
Nathan Yonkee 9:d58e77ebd769 285 bool _deep_sleep_locked;
Nathan Yonkee 9:d58e77ebd769 286 #endif
Nathan Yonkee 9:d58e77ebd769 287
Nathan Yonkee 9:d58e77ebd769 288 void aquire(void);
Nathan Yonkee 9:d58e77ebd769 289 static SPI *_owner;
Nathan Yonkee 9:d58e77ebd769 290 static SingletonPtr<PlatformMutex> _mutex;
Nathan Yonkee 9:d58e77ebd769 291 int _bits;
Nathan Yonkee 9:d58e77ebd769 292 int _mode;
Nathan Yonkee 9:d58e77ebd769 293 int _hz;
Nathan Yonkee 9:d58e77ebd769 294 char _write_fill;
Nathan Yonkee 9:d58e77ebd769 295
Nathan Yonkee 9:d58e77ebd769 296 private:
Nathan Yonkee 9:d58e77ebd769 297 /* Private acquire function without locking/unlocking
Nathan Yonkee 9:d58e77ebd769 298 * Implemented in order to avoid duplicate locking and boost performance
Nathan Yonkee 9:d58e77ebd769 299 */
Nathan Yonkee 9:d58e77ebd769 300 void _acquire(void);
Nathan Yonkee 9:d58e77ebd769 301 };
Nathan Yonkee 9:d58e77ebd769 302
Nathan Yonkee 9:d58e77ebd769 303 } // namespace mbed
Nathan Yonkee 9:d58e77ebd769 304
Nathan Yonkee 9:d58e77ebd769 305 #endif
Nathan Yonkee 9:d58e77ebd769 306
Nathan Yonkee 9:d58e77ebd769 307 #endif