Руслан Бредун / Mbed 2 deprecated stm32-sensor-base2

test

Dependencies:   mbed Watchdog

Dependents:   STM32-MC_node

mbed/hal/i2c_api.h@0:d383e2dee0f7, 2020-07-06 (annotated)

Committer:
ommpy
Date:
Mon Jul 06 17:18:59 2020 +0530
Revision:
0:d383e2dee0f7
first commit

Who changed what in which revision?

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ommpy 0:d383e2dee0f7 1
ommpy 0:d383e2dee0f7 2 /** \addtogroup hal */
ommpy 0:d383e2dee0f7 3 /** @{*/
ommpy 0:d383e2dee0f7 4 /* mbed Microcontroller Library
ommpy 0:d383e2dee0f7 5 * Copyright (c) 2006-2015 ARM Limited
ommpy 0:d383e2dee0f7 6 * SPDX-License-Identifier: Apache-2.0
ommpy 0:d383e2dee0f7 7 *
ommpy 0:d383e2dee0f7 8 * Licensed under the Apache License, Version 2.0 (the "License");
ommpy 0:d383e2dee0f7 9 * you may not use this file except in compliance with the License.
ommpy 0:d383e2dee0f7 10 * You may obtain a copy of the License at
ommpy 0:d383e2dee0f7 11 *
ommpy 0:d383e2dee0f7 12 * http://www.apache.org/licenses/LICENSE-2.0
ommpy 0:d383e2dee0f7 13 *
ommpy 0:d383e2dee0f7 14 * Unless required by applicable law or agreed to in writing, software
ommpy 0:d383e2dee0f7 15 * distributed under the License is distributed on an "AS IS" BASIS,
ommpy 0:d383e2dee0f7 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ommpy 0:d383e2dee0f7 17 * See the License for the specific language governing permissions and
ommpy 0:d383e2dee0f7 18 * limitations under the License.
ommpy 0:d383e2dee0f7 19 */
ommpy 0:d383e2dee0f7 20 #ifndef MBED_I2C_API_H
ommpy 0:d383e2dee0f7 21 #define MBED_I2C_API_H
ommpy 0:d383e2dee0f7 22
ommpy 0:d383e2dee0f7 23 #include "device.h"
ommpy 0:d383e2dee0f7 24 #include "hal/buffer.h"
ommpy 0:d383e2dee0f7 25
ommpy 0:d383e2dee0f7 26 #if DEVICE_I2C_ASYNCH
ommpy 0:d383e2dee0f7 27 #include "hal/dma_api.h"
ommpy 0:d383e2dee0f7 28 #endif
ommpy 0:d383e2dee0f7 29
ommpy 0:d383e2dee0f7 30 #if DEVICE_I2C
ommpy 0:d383e2dee0f7 31
ommpy 0:d383e2dee0f7 32 /**
ommpy 0:d383e2dee0f7 33 * @defgroup hal_I2CEvents I2C Events Macros
ommpy 0:d383e2dee0f7 34 *
ommpy 0:d383e2dee0f7 35 * @{
ommpy 0:d383e2dee0f7 36 */
ommpy 0:d383e2dee0f7 37 #define I2C_EVENT_ERROR (1 << 1)
ommpy 0:d383e2dee0f7 38 #define I2C_EVENT_ERROR_NO_SLAVE (1 << 2)
ommpy 0:d383e2dee0f7 39 #define I2C_EVENT_TRANSFER_COMPLETE (1 << 3)
ommpy 0:d383e2dee0f7 40 #define I2C_EVENT_TRANSFER_EARLY_NACK (1 << 4)
ommpy 0:d383e2dee0f7 41 #define I2C_EVENT_ALL (I2C_EVENT_ERROR | I2C_EVENT_TRANSFER_COMPLETE | I2C_EVENT_ERROR_NO_SLAVE | I2C_EVENT_TRANSFER_EARLY_NACK)
ommpy 0:d383e2dee0f7 42
ommpy 0:d383e2dee0f7 43 /**@}*/
ommpy 0:d383e2dee0f7 44
ommpy 0:d383e2dee0f7 45 #if DEVICE_I2C_ASYNCH
ommpy 0:d383e2dee0f7 46 /** Asynch I2C HAL structure
ommpy 0:d383e2dee0f7 47 */
ommpy 0:d383e2dee0f7 48 typedef struct {
ommpy 0:d383e2dee0f7 49 struct i2c_s i2c; /**< Target specific I2C structure */
ommpy 0:d383e2dee0f7 50 struct buffer_s tx_buff; /**< Tx buffer */
ommpy 0:d383e2dee0f7 51 struct buffer_s rx_buff; /**< Rx buffer */
ommpy 0:d383e2dee0f7 52 } i2c_t;
ommpy 0:d383e2dee0f7 53
ommpy 0:d383e2dee0f7 54 #else
ommpy 0:d383e2dee0f7 55 /** Non-asynch I2C HAL structure
ommpy 0:d383e2dee0f7 56 */
ommpy 0:d383e2dee0f7 57 typedef struct i2c_s i2c_t;
ommpy 0:d383e2dee0f7 58
ommpy 0:d383e2dee0f7 59 #endif
ommpy 0:d383e2dee0f7 60
ommpy 0:d383e2dee0f7 61 enum {
ommpy 0:d383e2dee0f7 62 I2C_ERROR_NO_SLAVE = -1,
ommpy 0:d383e2dee0f7 63 I2C_ERROR_BUS_BUSY = -2
ommpy 0:d383e2dee0f7 64 };
ommpy 0:d383e2dee0f7 65
ommpy 0:d383e2dee0f7 66 #ifdef __cplusplus
ommpy 0:d383e2dee0f7 67 extern "C" {
ommpy 0:d383e2dee0f7 68 #endif
ommpy 0:d383e2dee0f7 69
ommpy 0:d383e2dee0f7 70 /**
ommpy 0:d383e2dee0f7 71 * \defgroup hal_GeneralI2C I2C Configuration Functions
ommpy 0:d383e2dee0f7 72 * @{
ommpy 0:d383e2dee0f7 73 */
ommpy 0:d383e2dee0f7 74
ommpy 0:d383e2dee0f7 75 /** Initialize the I2C peripheral. It sets the default parameters for I2C
ommpy 0:d383e2dee0f7 76 * peripheral, and configures its specifieds pins.
ommpy 0:d383e2dee0f7 77 *
ommpy 0:d383e2dee0f7 78 * @param obj The I2C object
ommpy 0:d383e2dee0f7 79 * @param sda The sda pin
ommpy 0:d383e2dee0f7 80 * @param scl The scl pin
ommpy 0:d383e2dee0f7 81 */
ommpy 0:d383e2dee0f7 82 void i2c_init(i2c_t *obj, PinName sda, PinName scl);
ommpy 0:d383e2dee0f7 83
ommpy 0:d383e2dee0f7 84 /** Configure the I2C frequency
ommpy 0:d383e2dee0f7 85 *
ommpy 0:d383e2dee0f7 86 * @param obj The I2C object
ommpy 0:d383e2dee0f7 87 * @param hz Frequency in Hz
ommpy 0:d383e2dee0f7 88 */
ommpy 0:d383e2dee0f7 89 void i2c_frequency(i2c_t *obj, int hz);
ommpy 0:d383e2dee0f7 90
ommpy 0:d383e2dee0f7 91 /** Send START command
ommpy 0:d383e2dee0f7 92 *
ommpy 0:d383e2dee0f7 93 * @param obj The I2C object
ommpy 0:d383e2dee0f7 94 */
ommpy 0:d383e2dee0f7 95 int i2c_start(i2c_t *obj);
ommpy 0:d383e2dee0f7 96
ommpy 0:d383e2dee0f7 97 /** Send STOP command
ommpy 0:d383e2dee0f7 98 *
ommpy 0:d383e2dee0f7 99 * @param obj The I2C object
ommpy 0:d383e2dee0f7 100 */
ommpy 0:d383e2dee0f7 101 int i2c_stop(i2c_t *obj);
ommpy 0:d383e2dee0f7 102
ommpy 0:d383e2dee0f7 103 /** Blocking reading data
ommpy 0:d383e2dee0f7 104 *
ommpy 0:d383e2dee0f7 105 * @param obj The I2C object
ommpy 0:d383e2dee0f7 106 * @param address 7-bit address (last bit is 1)
ommpy 0:d383e2dee0f7 107 * @param data The buffer for receiving
ommpy 0:d383e2dee0f7 108 * @param length Number of bytes to read
ommpy 0:d383e2dee0f7 109 * @param stop Stop to be generated after the transfer is done
ommpy 0:d383e2dee0f7 110 * @return Number of read bytes
ommpy 0:d383e2dee0f7 111 */
ommpy 0:d383e2dee0f7 112 int i2c_read(i2c_t *obj, int address, char *data, int length, int stop);
ommpy 0:d383e2dee0f7 113
ommpy 0:d383e2dee0f7 114 /** Blocking sending data
ommpy 0:d383e2dee0f7 115 *
ommpy 0:d383e2dee0f7 116 * @param obj The I2C object
ommpy 0:d383e2dee0f7 117 * @param address 7-bit address (last bit is 0)
ommpy 0:d383e2dee0f7 118 * @param data The buffer for sending
ommpy 0:d383e2dee0f7 119 * @param length Number of bytes to write
ommpy 0:d383e2dee0f7 120 * @param stop Stop to be generated after the transfer is done
ommpy 0:d383e2dee0f7 121 * @return
ommpy 0:d383e2dee0f7 122 * zero or non-zero - Number of written bytes
ommpy 0:d383e2dee0f7 123 * negative - I2C_ERROR_XXX status
ommpy 0:d383e2dee0f7 124 */
ommpy 0:d383e2dee0f7 125 int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop);
ommpy 0:d383e2dee0f7 126
ommpy 0:d383e2dee0f7 127 /** Reset I2C peripheral. TODO: The action here. Most of the implementation sends stop()
ommpy 0:d383e2dee0f7 128 *
ommpy 0:d383e2dee0f7 129 * @param obj The I2C object
ommpy 0:d383e2dee0f7 130 */
ommpy 0:d383e2dee0f7 131 void i2c_reset(i2c_t *obj);
ommpy 0:d383e2dee0f7 132
ommpy 0:d383e2dee0f7 133 /** Read one byte
ommpy 0:d383e2dee0f7 134 *
ommpy 0:d383e2dee0f7 135 * @param obj The I2C object
ommpy 0:d383e2dee0f7 136 * @param last Acknoledge
ommpy 0:d383e2dee0f7 137 * @return The read byte
ommpy 0:d383e2dee0f7 138 */
ommpy 0:d383e2dee0f7 139 int i2c_byte_read(i2c_t *obj, int last);
ommpy 0:d383e2dee0f7 140
ommpy 0:d383e2dee0f7 141 /** Write one byte
ommpy 0:d383e2dee0f7 142 *
ommpy 0:d383e2dee0f7 143 * @param obj The I2C object
ommpy 0:d383e2dee0f7 144 * @param data Byte to be written
ommpy 0:d383e2dee0f7 145 * @return 0 if NAK was received, 1 if ACK was received, 2 for timeout.
ommpy 0:d383e2dee0f7 146 */
ommpy 0:d383e2dee0f7 147 int i2c_byte_write(i2c_t *obj, int data);
ommpy 0:d383e2dee0f7 148
ommpy 0:d383e2dee0f7 149 /**@}*/
ommpy 0:d383e2dee0f7 150
ommpy 0:d383e2dee0f7 151 #if DEVICE_I2CSLAVE
ommpy 0:d383e2dee0f7 152
ommpy 0:d383e2dee0f7 153 /**
ommpy 0:d383e2dee0f7 154 * \defgroup SynchI2C Synchronous I2C Hardware Abstraction Layer for slave
ommpy 0:d383e2dee0f7 155 * @{
ommpy 0:d383e2dee0f7 156 */
ommpy 0:d383e2dee0f7 157
ommpy 0:d383e2dee0f7 158 /** Configure I2C as slave or master.
ommpy 0:d383e2dee0f7 159 * @param obj The I2C object
ommpy 0:d383e2dee0f7 160 * @param enable_slave Enable i2c hardware so you can receive events with ::i2c_slave_receive
ommpy 0:d383e2dee0f7 161 * @return non-zero if a value is available
ommpy 0:d383e2dee0f7 162 */
ommpy 0:d383e2dee0f7 163 void i2c_slave_mode(i2c_t *obj, int enable_slave);
ommpy 0:d383e2dee0f7 164
ommpy 0:d383e2dee0f7 165 /** Check to see if the I2C slave has been addressed.
ommpy 0:d383e2dee0f7 166 * @param obj The I2C object
ommpy 0:d383e2dee0f7 167 * @return The status - 1 - read addresses, 2 - write to all slaves,
ommpy 0:d383e2dee0f7 168 * 3 write addressed, 0 - the slave has not been addressed
ommpy 0:d383e2dee0f7 169 */
ommpy 0:d383e2dee0f7 170 int i2c_slave_receive(i2c_t *obj);
ommpy 0:d383e2dee0f7 171
ommpy 0:d383e2dee0f7 172 /** Configure I2C as slave or master.
ommpy 0:d383e2dee0f7 173 * @param obj The I2C object
ommpy 0:d383e2dee0f7 174 * @param data The buffer for receiving
ommpy 0:d383e2dee0f7 175 * @param length Number of bytes to read
ommpy 0:d383e2dee0f7 176 * @return non-zero if a value is available
ommpy 0:d383e2dee0f7 177 */
ommpy 0:d383e2dee0f7 178 int i2c_slave_read(i2c_t *obj, char *data, int length);
ommpy 0:d383e2dee0f7 179
ommpy 0:d383e2dee0f7 180 /** Configure I2C as slave or master.
ommpy 0:d383e2dee0f7 181 * @param obj The I2C object
ommpy 0:d383e2dee0f7 182 * @param data The buffer for sending
ommpy 0:d383e2dee0f7 183 * @param length Number of bytes to write
ommpy 0:d383e2dee0f7 184 * @return non-zero if a value is available
ommpy 0:d383e2dee0f7 185 */
ommpy 0:d383e2dee0f7 186 int i2c_slave_write(i2c_t *obj, const char *data, int length);
ommpy 0:d383e2dee0f7 187
ommpy 0:d383e2dee0f7 188 /** Configure I2C address.
ommpy 0:d383e2dee0f7 189 * @param obj The I2C object
ommpy 0:d383e2dee0f7 190 * @param idx Currently not used
ommpy 0:d383e2dee0f7 191 * @param address The address to be set
ommpy 0:d383e2dee0f7 192 * @param mask Currently not used
ommpy 0:d383e2dee0f7 193 */
ommpy 0:d383e2dee0f7 194 void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask);
ommpy 0:d383e2dee0f7 195
ommpy 0:d383e2dee0f7 196 #endif
ommpy 0:d383e2dee0f7 197
ommpy 0:d383e2dee0f7 198 /**@}*/
ommpy 0:d383e2dee0f7 199
ommpy 0:d383e2dee0f7 200 #if DEVICE_I2C_ASYNCH
ommpy 0:d383e2dee0f7 201
ommpy 0:d383e2dee0f7 202 /**
ommpy 0:d383e2dee0f7 203 * \defgroup hal_AsynchI2C Asynchronous I2C Hardware Abstraction Layer
ommpy 0:d383e2dee0f7 204 * @{
ommpy 0:d383e2dee0f7 205 */
ommpy 0:d383e2dee0f7 206
ommpy 0:d383e2dee0f7 207 /** Start I2C asynchronous transfer
ommpy 0:d383e2dee0f7 208 *
ommpy 0:d383e2dee0f7 209 * @param obj The I2C object
ommpy 0:d383e2dee0f7 210 * @param tx The transmit buffer
ommpy 0:d383e2dee0f7 211 * @param tx_length The number of bytes to transmit
ommpy 0:d383e2dee0f7 212 * @param rx The receive buffer
ommpy 0:d383e2dee0f7 213 * @param rx_length The number of bytes to receive
ommpy 0:d383e2dee0f7 214 * @param address The address to be set - 7bit or 9bit
ommpy 0:d383e2dee0f7 215 * @param stop If true, stop will be generated after the transfer is done
ommpy 0:d383e2dee0f7 216 * @param handler The I2C IRQ handler to be set
ommpy 0:d383e2dee0f7 217 * @param event Event mask for the transfer. See \ref hal_I2CEvents
ommpy 0:d383e2dee0f7 218 * @param hint DMA hint usage
ommpy 0:d383e2dee0f7 219 */
ommpy 0:d383e2dee0f7 220 void i2c_transfer_asynch(i2c_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint);
ommpy 0:d383e2dee0f7 221
ommpy 0:d383e2dee0f7 222 /** The asynchronous IRQ handler
ommpy 0:d383e2dee0f7 223 *
ommpy 0:d383e2dee0f7 224 * @param obj The I2C object which holds the transfer information
ommpy 0:d383e2dee0f7 225 * @return Event flags if a transfer termination condition was met, otherwise return 0.
ommpy 0:d383e2dee0f7 226 */
ommpy 0:d383e2dee0f7 227 uint32_t i2c_irq_handler_asynch(i2c_t *obj);
ommpy 0:d383e2dee0f7 228
ommpy 0:d383e2dee0f7 229 /** Attempts to determine if the I2C peripheral is already in use
ommpy 0:d383e2dee0f7 230 *
ommpy 0:d383e2dee0f7 231 * @param obj The I2C object
ommpy 0:d383e2dee0f7 232 * @return Non-zero if the I2C module is active or zero if it is not
ommpy 0:d383e2dee0f7 233 */
ommpy 0:d383e2dee0f7 234 uint8_t i2c_active(i2c_t *obj);
ommpy 0:d383e2dee0f7 235
ommpy 0:d383e2dee0f7 236 /** Abort asynchronous transfer
ommpy 0:d383e2dee0f7 237 *
ommpy 0:d383e2dee0f7 238 * This function does not perform any check - that should happen in upper layers.
ommpy 0:d383e2dee0f7 239 * @param obj The I2C object
ommpy 0:d383e2dee0f7 240 */
ommpy 0:d383e2dee0f7 241 void i2c_abort_asynch(i2c_t *obj);
ommpy 0:d383e2dee0f7 242
ommpy 0:d383e2dee0f7 243 #endif
ommpy 0:d383e2dee0f7 244
ommpy 0:d383e2dee0f7 245 /**@}*/
ommpy 0:d383e2dee0f7 246
ommpy 0:d383e2dee0f7 247 #ifdef __cplusplus
ommpy 0:d383e2dee0f7 248 }
ommpy 0:d383e2dee0f7 249 #endif
ommpy 0:d383e2dee0f7 250
ommpy 0:d383e2dee0f7 251 #endif
ommpy 0:d383e2dee0f7 252
ommpy 0:d383e2dee0f7 253 #endif
ommpy 0:d383e2dee0f7 254
ommpy 0:d383e2dee0f7 255 /** @}*/