zhang boie / mbed-dev-f30333

mbed-dev-f303

drivers/I2C.h@0:bdf663c61a82, 2022-06-14 (annotated)

Committer:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4
Date:
Tue Jun 14 09:21:18 2022 +0000
Revision:
0:bdf663c61a82
lib

Who changed what in which revision?

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abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 1 /* mbed Microcontroller Library
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 2 * Copyright (c) 2006-2015 ARM Limited
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 3 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 4 * Licensed under the Apache License, Version 2.0 (the "License");
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 5 * you may not use this file except in compliance with the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 6 * You may obtain a copy of the License at
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 7 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 8 * http://www.apache.org/licenses/LICENSE-2.0
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 9 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 10 * Unless required by applicable law or agreed to in writing, software
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 11 * distributed under the License is distributed on an "AS IS" BASIS,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 13 * See the License for the specific language governing permissions and
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 14 * limitations under the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 15 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 16 #ifndef MBED_I2C_H
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 17 #define MBED_I2C_H
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 18
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 19 #include "platform/platform.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 20
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 21 #if defined (DEVICE_I2C) || defined(DOXYGEN_ONLY)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 22
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 23 #include "hal/i2c_api.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 24 #include "platform/SingletonPtr.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 25 #include "platform/PlatformMutex.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 26 #include "platform/NonCopyable.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 27
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 28 #if DEVICE_I2C_ASYNCH
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 29 #include "platform/CThunk.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 30 #include "hal/dma_api.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 31 #include "platform/FunctionPointer.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 32 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 33
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 34 namespace mbed {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 35 /** \addtogroup drivers */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 36
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 37 /** An I2C Master, used for communicating with I2C slave devices
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 38 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 39 * @note Synchronization level: Thread safe
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 40 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 41 * Example:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 42 * @code
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 43 * // Read from I2C slave at address 0x62
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 44 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 45 * #include "mbed.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 46 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 47 * I2C i2c(p28, p27);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 48 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 49 * int main() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 50 * int address = 0x62;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 51 * char data[2];
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 52 * i2c.read(address, data, 2);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 53 * }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 54 * @endcode
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 55 * @ingroup drivers
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 56 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 57 class I2C : private NonCopyable<I2C> {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 58
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 59 public:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 60 enum RxStatus {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 61 NoData,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 62 MasterGeneralCall,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 63 MasterWrite,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 64 MasterRead
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 65 };
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 66
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 67 enum Acknowledge {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 68 NoACK = 0,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 69 ACK = 1
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 70 };
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 71
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 72 /** Create an I2C Master interface, connected to the specified pins
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 73 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 74 * @param sda I2C data line pin
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 75 * @param scl I2C clock line pin
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 76 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 77 I2C(PinName sda, PinName scl);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 78
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 79 /** Set the frequency of the I2C interface
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 80 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 81 * @param hz The bus frequency in hertz
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 82 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 83 void frequency(int hz);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 84
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 85 /** Read from an I2C slave
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 86 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 87 * Performs a complete read transaction. The bottom bit of
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 88 * the address is forced to 1 to indicate a read.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 89 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 90 * @param address 8-bit I2C slave address [ addr | 1 ]
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 91 * @param data Pointer to the byte-array to read data in to
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 92 * @param length Number of bytes to read
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 93 * @param repeated Repeated start, true - don't send stop at end
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 94 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 95 * @returns
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 96 * 0 on success (ack),
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 97 * non-0 on failure (nack)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 98 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 99 int read(int address, char *data, int length, bool repeated = false);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 100
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 101 /** Read a single byte from the I2C bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 102 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 103 * @param ack indicates if the byte is to be acknowledged (1 = acknowledge)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 104 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 105 * @returns
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 106 * the byte read
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 107 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 108 int read(int ack);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 109
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 110 /** Write to an I2C slave
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 111 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 112 * Performs a complete write transaction. The bottom bit of
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 113 * the address is forced to 0 to indicate a write.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 114 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 115 * @param address 8-bit I2C slave address [ addr | 0 ]
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 116 * @param data Pointer to the byte-array data to send
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 117 * @param length Number of bytes to send
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 118 * @param repeated Repeated start, true - do not send stop at end
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 119 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 120 * @returns
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 121 * 0 on success (ack),
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 122 * non-0 on failure (nack)
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 123 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 124 int write(int address, const char *data, int length, bool repeated = false);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 125
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 126 /** Write single byte out on the I2C bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 127 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 128 * @param data data to write out on bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 129 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 130 * @returns
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 131 * '0' - NAK was received
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 132 * '1' - ACK was received,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 133 * '2' - timeout
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 134 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 135 int write(int data);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 136
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 137 /** Creates a start condition on the I2C bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 138 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 139
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 140 void start(void);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 141
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 142 /** Creates a stop condition on the I2C bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 143 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 144 void stop(void);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 145
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 146 /** Acquire exclusive access to this I2C bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 147 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 148 virtual void lock(void);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 149
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 150 /** Release exclusive access to this I2C bus
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 151 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 152 virtual void unlock(void);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 153
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 154 virtual ~I2C() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 155 // Do nothing
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 156 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 157
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 158 #if DEVICE_I2C_ASYNCH
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 159
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 160 /** Start non-blocking I2C transfer.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 161 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 162 * This function locks the deep sleep until any event has occured
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 163 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 164 * @param address 8/10 bit I2c slave address
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 165 * @param tx_buffer The TX buffer with data to be transfered
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 166 * @param tx_length The length of TX buffer in bytes
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 167 * @param rx_buffer The RX buffer which is used for received data
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 168 * @param rx_length The length of RX buffer in bytes
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 169 * @param event The logical OR of events to modify
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 170 * @param callback The event callback function
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 171 * @param repeated Repeated start, true - do not send stop at end
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 172 * @return Zero if the transfer has started, or -1 if I2C peripheral is busy
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 173 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 174 int transfer(int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event = I2C_EVENT_TRANSFER_COMPLETE, bool repeated = false);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 175
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 176 /** Abort the on-going I2C transfer
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 177 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 178 void abort_transfer();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 179 protected:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 180 void irq_handler_asynch(void);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 181 event_callback_t _callback;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 182 CThunk<I2C> _irq;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 183 DMAUsage _usage;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 184 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 185
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 186 protected:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 187 void aquire();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 188
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 189 i2c_t _i2c;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 190 static I2C *_owner;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 191 int _hz;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 192 static SingletonPtr<PlatformMutex> _mutex;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 193 };
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 194
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 195 } // namespace mbed
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 196
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 197 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 198
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 199 #endif
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 200