Daniel Sygut / Application

lol

Dependencies:   MMA8451Q

Fork of Application by Mateusz Kowalik

mbed-dev/targets/TARGET_STM/i2c_api.c@12:3a30cdffa27c, 2018-01-21 (annotated)

Committer:
danix
Date:
Sun Jan 21 22:28:30 2018 +0000
Revision:
12:3a30cdffa27c
Parent:
10:41552d038a69 
Working acelerometer and mouse

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Zaitsev 10:41552d038a69 1 /* mbed Microcontroller Library
Zaitsev 10:41552d038a69 2 *******************************************************************************
Zaitsev 10:41552d038a69 3 * Copyright (c) 2015, STMicroelectronics
Zaitsev 10:41552d038a69 4 * All rights reserved.
Zaitsev 10:41552d038a69 5 *
Zaitsev 10:41552d038a69 6 * Redistribution and use in source and binary forms, with or without
Zaitsev 10:41552d038a69 7 * modification, are permitted provided that the following conditions are met:
Zaitsev 10:41552d038a69 8 *
Zaitsev 10:41552d038a69 9 * 1. Redistributions of source code must retain the above copyright notice,
Zaitsev 10:41552d038a69 10 * this list of conditions and the following disclaimer.
Zaitsev 10:41552d038a69 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
Zaitsev 10:41552d038a69 12 * this list of conditions and the following disclaimer in the documentation
Zaitsev 10:41552d038a69 13 * and/or other materials provided with the distribution.
Zaitsev 10:41552d038a69 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
Zaitsev 10:41552d038a69 15 * may be used to endorse or promote products derived from this software
Zaitsev 10:41552d038a69 16 * without specific prior written permission.
Zaitsev 10:41552d038a69 17 *
Zaitsev 10:41552d038a69 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Zaitsev 10:41552d038a69 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Zaitsev 10:41552d038a69 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Zaitsev 10:41552d038a69 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
Zaitsev 10:41552d038a69 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
Zaitsev 10:41552d038a69 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
Zaitsev 10:41552d038a69 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
Zaitsev 10:41552d038a69 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
Zaitsev 10:41552d038a69 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
Zaitsev 10:41552d038a69 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Zaitsev 10:41552d038a69 28 *******************************************************************************
Zaitsev 10:41552d038a69 29 */
Zaitsev 10:41552d038a69 30
Zaitsev 10:41552d038a69 31
Zaitsev 10:41552d038a69 32 #include "mbed_assert.h"
Zaitsev 10:41552d038a69 33 #include "i2c_api.h"
Zaitsev 10:41552d038a69 34 #include "platform/wait_api.h"
Zaitsev 10:41552d038a69 35
Zaitsev 10:41552d038a69 36 #if DEVICE_I2C
Zaitsev 10:41552d038a69 37
Zaitsev 10:41552d038a69 38 #include "cmsis.h"
Zaitsev 10:41552d038a69 39 #include "pinmap.h"
Zaitsev 10:41552d038a69 40 #include "PeripheralPins.h"
Zaitsev 10:41552d038a69 41 #include "i2c_device.h" // family specific defines
Zaitsev 10:41552d038a69 42
Zaitsev 10:41552d038a69 43 #ifndef DEBUG_STDIO
Zaitsev 10:41552d038a69 44 # define DEBUG_STDIO 0
Zaitsev 10:41552d038a69 45 #endif
Zaitsev 10:41552d038a69 46
Zaitsev 10:41552d038a69 47 #if DEBUG_STDIO
Zaitsev 10:41552d038a69 48 # include <stdio.h>
Zaitsev 10:41552d038a69 49 # define DEBUG_PRINTF(...) do { printf(__VA_ARGS__); } while(0)
Zaitsev 10:41552d038a69 50 #else
Zaitsev 10:41552d038a69 51 # define DEBUG_PRINTF(...) {}
Zaitsev 10:41552d038a69 52 #endif
Zaitsev 10:41552d038a69 53
Zaitsev 10:41552d038a69 54 #if DEVICE_I2C_ASYNCH
Zaitsev 10:41552d038a69 55 #define I2C_S(obj) (struct i2c_s *) (&((obj)->i2c))
Zaitsev 10:41552d038a69 56 #else
Zaitsev 10:41552d038a69 57 #define I2C_S(obj) (struct i2c_s *) (obj)
Zaitsev 10:41552d038a69 58 #endif
Zaitsev 10:41552d038a69 59
Zaitsev 10:41552d038a69 60 /* Family specific description for I2C */
Zaitsev 10:41552d038a69 61 #define I2C_NUM (5)
Zaitsev 10:41552d038a69 62 static I2C_HandleTypeDef* i2c_handles[I2C_NUM];
Zaitsev 10:41552d038a69 63
Zaitsev 10:41552d038a69 64 /* Timeout values are based on core clock and I2C clock.
Zaitsev 10:41552d038a69 65 The BYTE_TIMEOUT is computed as twice the number of cycles it would
Zaitsev 10:41552d038a69 66 take to send 10 bits over I2C. Most Flags should take less than that.
Zaitsev 10:41552d038a69 67 This is for immediate FLAG or ACK check.
Zaitsev 10:41552d038a69 68 */
Zaitsev 10:41552d038a69 69 #define BYTE_TIMEOUT ((SystemCoreClock / obj_s->hz) * 2 * 10)
Zaitsev 10:41552d038a69 70 /* Timeout values based on I2C clock.
Zaitsev 10:41552d038a69 71 The BYTE_TIMEOUT_US is computed as 3x the time in us it would
Zaitsev 10:41552d038a69 72 take to send 10 bits over I2C. Most Flags should take less than that.
Zaitsev 10:41552d038a69 73 This is for complete transfers check.
Zaitsev 10:41552d038a69 74 */
Zaitsev 10:41552d038a69 75 #define BYTE_TIMEOUT_US ((SystemCoreClock / obj_s->hz) * 3 * 10)
Zaitsev 10:41552d038a69 76 /* Timeout values for flags and events waiting loops. These timeouts are
Zaitsev 10:41552d038a69 77 not based on accurate values, they just guarantee that the application will
Zaitsev 10:41552d038a69 78 not remain stuck if the I2C communication is corrupted.
Zaitsev 10:41552d038a69 79 */
Zaitsev 10:41552d038a69 80 #define FLAG_TIMEOUT ((int)0x1000)
Zaitsev 10:41552d038a69 81
Zaitsev 10:41552d038a69 82 /* GENERIC INIT and HELPERS FUNCTIONS */
Zaitsev 10:41552d038a69 83
Zaitsev 10:41552d038a69 84 #if defined(I2C1_BASE)
Zaitsev 10:41552d038a69 85 static void i2c1_irq(void)
Zaitsev 10:41552d038a69 86 {
Zaitsev 10:41552d038a69 87 I2C_HandleTypeDef * handle = i2c_handles[0];
Zaitsev 10:41552d038a69 88 HAL_I2C_EV_IRQHandler(handle);
Zaitsev 10:41552d038a69 89 HAL_I2C_ER_IRQHandler(handle);
Zaitsev 10:41552d038a69 90 }
Zaitsev 10:41552d038a69 91 #endif
Zaitsev 10:41552d038a69 92 #if defined(I2C2_BASE)
Zaitsev 10:41552d038a69 93 static void i2c2_irq(void)
Zaitsev 10:41552d038a69 94 {
Zaitsev 10:41552d038a69 95 I2C_HandleTypeDef * handle = i2c_handles[1];
Zaitsev 10:41552d038a69 96 HAL_I2C_EV_IRQHandler(handle);
Zaitsev 10:41552d038a69 97 HAL_I2C_ER_IRQHandler(handle);
Zaitsev 10:41552d038a69 98 }
Zaitsev 10:41552d038a69 99 #endif
Zaitsev 10:41552d038a69 100 #if defined(I2C3_BASE)
Zaitsev 10:41552d038a69 101 static void i2c3_irq(void)
Zaitsev 10:41552d038a69 102 {
Zaitsev 10:41552d038a69 103 I2C_HandleTypeDef * handle = i2c_handles[2];
Zaitsev 10:41552d038a69 104 HAL_I2C_EV_IRQHandler(handle);
Zaitsev 10:41552d038a69 105 HAL_I2C_ER_IRQHandler(handle);
Zaitsev 10:41552d038a69 106 }
Zaitsev 10:41552d038a69 107 #endif
Zaitsev 10:41552d038a69 108 #if defined(I2C4_BASE)
Zaitsev 10:41552d038a69 109 static void i2c4_irq(void)
Zaitsev 10:41552d038a69 110 {
Zaitsev 10:41552d038a69 111 I2C_HandleTypeDef * handle = i2c_handles[3];
Zaitsev 10:41552d038a69 112 HAL_I2C_EV_IRQHandler(handle);
Zaitsev 10:41552d038a69 113 HAL_I2C_ER_IRQHandler(handle);
Zaitsev 10:41552d038a69 114 }
Zaitsev 10:41552d038a69 115 #endif
Zaitsev 10:41552d038a69 116 #if defined(FMPI2C1_BASE)
Zaitsev 10:41552d038a69 117 static void i2c5_irq(void)
Zaitsev 10:41552d038a69 118 {
Zaitsev 10:41552d038a69 119 I2C_HandleTypeDef * handle = i2c_handles[4];
Zaitsev 10:41552d038a69 120 HAL_I2C_EV_IRQHandler(handle);
Zaitsev 10:41552d038a69 121 HAL_I2C_ER_IRQHandler(handle);
Zaitsev 10:41552d038a69 122 }
Zaitsev 10:41552d038a69 123 #endif
Zaitsev 10:41552d038a69 124
Zaitsev 10:41552d038a69 125 void i2c_ev_err_enable(i2c_t *obj, uint32_t handler) {
Zaitsev 10:41552d038a69 126 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 127 IRQn_Type irq_event_n = obj_s->event_i2cIRQ;
Zaitsev 10:41552d038a69 128 IRQn_Type irq_error_n = obj_s->error_i2cIRQ;
Zaitsev 10:41552d038a69 129 /* default prio in master case is set to 2 */
Zaitsev 10:41552d038a69 130 uint32_t prio = 2;
Zaitsev 10:41552d038a69 131
Zaitsev 10:41552d038a69 132 /* Set up ITs using IRQ and handler tables */
Zaitsev 10:41552d038a69 133 NVIC_SetVector(irq_event_n, handler);
Zaitsev 10:41552d038a69 134 NVIC_SetVector(irq_error_n, handler);
Zaitsev 10:41552d038a69 135
Zaitsev 10:41552d038a69 136 #if DEVICE_I2CSLAVE
Zaitsev 10:41552d038a69 137 /* Set higher priority to slave device than master.
Zaitsev 10:41552d038a69 138 * In case a device makes use of both master and slave, the
Zaitsev 10:41552d038a69 139 * slave needs higher responsiveness.
Zaitsev 10:41552d038a69 140 */
Zaitsev 10:41552d038a69 141 if (obj_s->slave) {
Zaitsev 10:41552d038a69 142 prio = 1;
Zaitsev 10:41552d038a69 143 }
Zaitsev 10:41552d038a69 144 #endif
Zaitsev 10:41552d038a69 145
Zaitsev 10:41552d038a69 146 NVIC_SetPriority(irq_event_n, prio);
Zaitsev 10:41552d038a69 147 NVIC_SetPriority(irq_error_n, prio);
Zaitsev 10:41552d038a69 148 NVIC_EnableIRQ(irq_event_n);
Zaitsev 10:41552d038a69 149 NVIC_EnableIRQ(irq_error_n);
Zaitsev 10:41552d038a69 150 }
Zaitsev 10:41552d038a69 151
Zaitsev 10:41552d038a69 152 void i2c_ev_err_disable(i2c_t *obj) {
Zaitsev 10:41552d038a69 153 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 154 IRQn_Type irq_event_n = obj_s->event_i2cIRQ;
Zaitsev 10:41552d038a69 155 IRQn_Type irq_error_n = obj_s->error_i2cIRQ;
Zaitsev 10:41552d038a69 156
Zaitsev 10:41552d038a69 157 HAL_NVIC_DisableIRQ(irq_event_n);
Zaitsev 10:41552d038a69 158 HAL_NVIC_DisableIRQ(irq_error_n);
Zaitsev 10:41552d038a69 159 }
Zaitsev 10:41552d038a69 160
Zaitsev 10:41552d038a69 161 uint32_t i2c_get_irq_handler(i2c_t *obj)
Zaitsev 10:41552d038a69 162 {
Zaitsev 10:41552d038a69 163 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 164 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 165 uint32_t handler = 0;
Zaitsev 10:41552d038a69 166
Zaitsev 10:41552d038a69 167 switch (obj_s->index) {
Zaitsev 10:41552d038a69 168 #if defined(I2C1_BASE)
Zaitsev 10:41552d038a69 169 case 0:
Zaitsev 10:41552d038a69 170 handler = (uint32_t)&i2c1_irq;
Zaitsev 10:41552d038a69 171 break;
Zaitsev 10:41552d038a69 172 #endif
Zaitsev 10:41552d038a69 173 #if defined(I2C2_BASE)
Zaitsev 10:41552d038a69 174 case 1:
Zaitsev 10:41552d038a69 175 handler = (uint32_t)&i2c2_irq;
Zaitsev 10:41552d038a69 176 break;
Zaitsev 10:41552d038a69 177 #endif
Zaitsev 10:41552d038a69 178 #if defined(I2C3_BASE)
Zaitsev 10:41552d038a69 179 case 2:
Zaitsev 10:41552d038a69 180 handler = (uint32_t)&i2c3_irq;
Zaitsev 10:41552d038a69 181 break;
Zaitsev 10:41552d038a69 182 #endif
Zaitsev 10:41552d038a69 183 #if defined(I2C4_BASE)
Zaitsev 10:41552d038a69 184 case 3:
Zaitsev 10:41552d038a69 185 handler = (uint32_t)&i2c4_irq;
Zaitsev 10:41552d038a69 186 break;
Zaitsev 10:41552d038a69 187 #endif
Zaitsev 10:41552d038a69 188 #if defined(FMPI2C1_BASE)
Zaitsev 10:41552d038a69 189 case 4:
Zaitsev 10:41552d038a69 190 handler = (uint32_t)&i2c5_irq;
Zaitsev 10:41552d038a69 191 break;
Zaitsev 10:41552d038a69 192 #endif
Zaitsev 10:41552d038a69 193 }
Zaitsev 10:41552d038a69 194
Zaitsev 10:41552d038a69 195 i2c_handles[obj_s->index] = handle;
Zaitsev 10:41552d038a69 196 return handler;
Zaitsev 10:41552d038a69 197 }
Zaitsev 10:41552d038a69 198
Zaitsev 10:41552d038a69 199 void i2c_hw_reset(i2c_t *obj) {
Zaitsev 10:41552d038a69 200 int timeout;
Zaitsev 10:41552d038a69 201 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 202 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 203
Zaitsev 10:41552d038a69 204 handle->Instance = (I2C_TypeDef *)(obj_s->i2c);
Zaitsev 10:41552d038a69 205
Zaitsev 10:41552d038a69 206 // wait before reset
Zaitsev 10:41552d038a69 207 timeout = BYTE_TIMEOUT;
Zaitsev 10:41552d038a69 208 while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BUSY)) && (--timeout != 0));
Zaitsev 10:41552d038a69 209 #if defined I2C1_BASE
Zaitsev 10:41552d038a69 210 if (obj_s->i2c == I2C_1) {
Zaitsev 10:41552d038a69 211 __HAL_RCC_I2C1_FORCE_RESET();
Zaitsev 10:41552d038a69 212 __HAL_RCC_I2C1_RELEASE_RESET();
Zaitsev 10:41552d038a69 213 }
Zaitsev 10:41552d038a69 214 #endif
Zaitsev 10:41552d038a69 215 #if defined I2C2_BASE
Zaitsev 10:41552d038a69 216 if (obj_s->i2c == I2C_2) {
Zaitsev 10:41552d038a69 217 __HAL_RCC_I2C2_FORCE_RESET();
Zaitsev 10:41552d038a69 218 __HAL_RCC_I2C2_RELEASE_RESET();
Zaitsev 10:41552d038a69 219 }
Zaitsev 10:41552d038a69 220 #endif
Zaitsev 10:41552d038a69 221 #if defined I2C3_BASE
Zaitsev 10:41552d038a69 222 if (obj_s->i2c == I2C_3) {
Zaitsev 10:41552d038a69 223 __HAL_RCC_I2C3_FORCE_RESET();
Zaitsev 10:41552d038a69 224 __HAL_RCC_I2C3_RELEASE_RESET();
Zaitsev 10:41552d038a69 225 }
Zaitsev 10:41552d038a69 226 #endif
Zaitsev 10:41552d038a69 227 #if defined I2C4_BASE
Zaitsev 10:41552d038a69 228 if (obj_s->i2c == I2C_4) {
Zaitsev 10:41552d038a69 229 __HAL_RCC_I2C4_FORCE_RESET();
Zaitsev 10:41552d038a69 230 __HAL_RCC_I2C4_RELEASE_RESET();
Zaitsev 10:41552d038a69 231 }
Zaitsev 10:41552d038a69 232 #endif
Zaitsev 10:41552d038a69 233 #if defined FMPI2C1_BASE
Zaitsev 10:41552d038a69 234 if (obj_s->i2c == FMPI2C_1) {
Zaitsev 10:41552d038a69 235 __HAL_RCC_FMPI2C1_FORCE_RESET();
Zaitsev 10:41552d038a69 236 __HAL_RCC_FMPI2C1_RELEASE_RESET();
Zaitsev 10:41552d038a69 237 }
Zaitsev 10:41552d038a69 238 #endif
Zaitsev 10:41552d038a69 239 }
Zaitsev 10:41552d038a69 240
Zaitsev 10:41552d038a69 241 void i2c_init(i2c_t *obj, PinName sda, PinName scl) {
Zaitsev 10:41552d038a69 242
Zaitsev 10:41552d038a69 243 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 244
Zaitsev 10:41552d038a69 245 // Determine the I2C to use
Zaitsev 10:41552d038a69 246 I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA);
Zaitsev 10:41552d038a69 247 I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL);
Zaitsev 10:41552d038a69 248 obj_s->sda = sda;
Zaitsev 10:41552d038a69 249 obj_s->scl = scl;
Zaitsev 10:41552d038a69 250
Zaitsev 10:41552d038a69 251 obj_s->i2c = (I2CName)pinmap_merge(i2c_sda, i2c_scl);
Zaitsev 10:41552d038a69 252 MBED_ASSERT(obj_s->i2c != (I2CName)NC);
Zaitsev 10:41552d038a69 253
Zaitsev 10:41552d038a69 254 #if defined I2C1_BASE
Zaitsev 10:41552d038a69 255 // Enable I2C1 clock and pinout if not done
Zaitsev 10:41552d038a69 256 if (obj_s->i2c == I2C_1) {
Zaitsev 10:41552d038a69 257 obj_s->index = 0;
Zaitsev 10:41552d038a69 258 __HAL_RCC_I2C1_CLK_ENABLE();
Zaitsev 10:41552d038a69 259 // Configure I2C pins
Zaitsev 10:41552d038a69 260 pinmap_pinout(sda, PinMap_I2C_SDA);
Zaitsev 10:41552d038a69 261 pinmap_pinout(scl, PinMap_I2C_SCL);
Zaitsev 10:41552d038a69 262 pin_mode(sda, PullUp);
Zaitsev 10:41552d038a69 263 pin_mode(scl, PullUp);
Zaitsev 10:41552d038a69 264 obj_s->event_i2cIRQ = I2C1_EV_IRQn;
Zaitsev 10:41552d038a69 265 obj_s->error_i2cIRQ = I2C1_ER_IRQn;
Zaitsev 10:41552d038a69 266 }
Zaitsev 10:41552d038a69 267 #endif
Zaitsev 10:41552d038a69 268 #if defined I2C2_BASE
Zaitsev 10:41552d038a69 269 // Enable I2C2 clock and pinout if not done
Zaitsev 10:41552d038a69 270 if (obj_s->i2c == I2C_2) {
Zaitsev 10:41552d038a69 271 obj_s->index = 1;
Zaitsev 10:41552d038a69 272 __HAL_RCC_I2C2_CLK_ENABLE();
Zaitsev 10:41552d038a69 273 // Configure I2C pins
Zaitsev 10:41552d038a69 274 pinmap_pinout(sda, PinMap_I2C_SDA);
Zaitsev 10:41552d038a69 275 pinmap_pinout(scl, PinMap_I2C_SCL);
Zaitsev 10:41552d038a69 276 pin_mode(sda, PullUp);
Zaitsev 10:41552d038a69 277 pin_mode(scl, PullUp);
Zaitsev 10:41552d038a69 278 obj_s->event_i2cIRQ = I2C2_EV_IRQn;
Zaitsev 10:41552d038a69 279 obj_s->error_i2cIRQ = I2C2_ER_IRQn;
Zaitsev 10:41552d038a69 280 }
Zaitsev 10:41552d038a69 281 #endif
Zaitsev 10:41552d038a69 282 #if defined I2C3_BASE
Zaitsev 10:41552d038a69 283 // Enable I2C3 clock and pinout if not done
Zaitsev 10:41552d038a69 284 if (obj_s->i2c == I2C_3) {
Zaitsev 10:41552d038a69 285 obj_s->index = 2;
Zaitsev 10:41552d038a69 286 __HAL_RCC_I2C3_CLK_ENABLE();
Zaitsev 10:41552d038a69 287 // Configure I2C pins
Zaitsev 10:41552d038a69 288 pinmap_pinout(sda, PinMap_I2C_SDA);
Zaitsev 10:41552d038a69 289 pinmap_pinout(scl, PinMap_I2C_SCL);
Zaitsev 10:41552d038a69 290 pin_mode(sda, PullUp);
Zaitsev 10:41552d038a69 291 pin_mode(scl, PullUp);
Zaitsev 10:41552d038a69 292 obj_s->event_i2cIRQ = I2C3_EV_IRQn;
Zaitsev 10:41552d038a69 293 obj_s->error_i2cIRQ = I2C3_ER_IRQn;
Zaitsev 10:41552d038a69 294 }
Zaitsev 10:41552d038a69 295 #endif
Zaitsev 10:41552d038a69 296 #if defined I2C4_BASE
Zaitsev 10:41552d038a69 297 // Enable I2C3 clock and pinout if not done
Zaitsev 10:41552d038a69 298 if (obj_s->i2c == I2C_4) {
Zaitsev 10:41552d038a69 299 obj_s->index = 3;
Zaitsev 10:41552d038a69 300 __HAL_RCC_I2C4_CLK_ENABLE();
Zaitsev 10:41552d038a69 301 // Configure I2C pins
Zaitsev 10:41552d038a69 302 pinmap_pinout(sda, PinMap_I2C_SDA);
Zaitsev 10:41552d038a69 303 pinmap_pinout(scl, PinMap_I2C_SCL);
Zaitsev 10:41552d038a69 304 pin_mode(sda, PullUp);
Zaitsev 10:41552d038a69 305 pin_mode(scl, PullUp);
Zaitsev 10:41552d038a69 306 obj_s->event_i2cIRQ = I2C4_EV_IRQn;
Zaitsev 10:41552d038a69 307 obj_s->error_i2cIRQ = I2C4_ER_IRQn;
Zaitsev 10:41552d038a69 308 }
Zaitsev 10:41552d038a69 309 #endif
Zaitsev 10:41552d038a69 310 #if defined FMPI2C1_BASE
Zaitsev 10:41552d038a69 311 // Enable I2C3 clock and pinout if not done
Zaitsev 10:41552d038a69 312 if (obj_s->i2c == FMPI2C_1) {
Zaitsev 10:41552d038a69 313 obj_s->index = 4;
Zaitsev 10:41552d038a69 314 __HAL_RCC_FMPI2C1_CLK_ENABLE();
Zaitsev 10:41552d038a69 315 // Configure I2C pins
Zaitsev 10:41552d038a69 316 pinmap_pinout(sda, PinMap_I2C_SDA);
Zaitsev 10:41552d038a69 317 pinmap_pinout(scl, PinMap_I2C_SCL);
Zaitsev 10:41552d038a69 318 pin_mode(sda, PullUp);
Zaitsev 10:41552d038a69 319 pin_mode(scl, PullUp);
Zaitsev 10:41552d038a69 320 obj_s->event_i2cIRQ = FMPI2C1_EV_IRQn;
Zaitsev 10:41552d038a69 321 obj_s->error_i2cIRQ = FMPI2C1_ER_IRQn;
Zaitsev 10:41552d038a69 322 }
Zaitsev 10:41552d038a69 323 #endif
Zaitsev 10:41552d038a69 324
Zaitsev 10:41552d038a69 325 // I2C configuration
Zaitsev 10:41552d038a69 326 // Default hz value used for timeout computation
Zaitsev 10:41552d038a69 327 if(!obj_s->hz)
Zaitsev 10:41552d038a69 328 obj_s->hz = 100000; // 100 kHz per default
Zaitsev 10:41552d038a69 329
Zaitsev 10:41552d038a69 330 // Reset to clear pending flags if any
Zaitsev 10:41552d038a69 331 i2c_hw_reset(obj);
Zaitsev 10:41552d038a69 332 i2c_frequency(obj, obj_s->hz );
Zaitsev 10:41552d038a69 333
Zaitsev 10:41552d038a69 334 #if DEVICE_I2CSLAVE
Zaitsev 10:41552d038a69 335 // I2C master by default
Zaitsev 10:41552d038a69 336 obj_s->slave = 0;
Zaitsev 10:41552d038a69 337 obj_s->pending_slave_tx_master_rx = 0;
Zaitsev 10:41552d038a69 338 obj_s->pending_slave_rx_maxter_tx = 0;
Zaitsev 10:41552d038a69 339 #endif
Zaitsev 10:41552d038a69 340
Zaitsev 10:41552d038a69 341 // I2C Xfer operation init
Zaitsev 10:41552d038a69 342 obj_s->event = 0;
Zaitsev 10:41552d038a69 343 obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME;
Zaitsev 10:41552d038a69 344 }
Zaitsev 10:41552d038a69 345
Zaitsev 10:41552d038a69 346 void i2c_frequency(i2c_t *obj, int hz)
Zaitsev 10:41552d038a69 347 {
Zaitsev 10:41552d038a69 348 int timeout;
Zaitsev 10:41552d038a69 349 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 350 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 351
Zaitsev 10:41552d038a69 352 // wait before init
Zaitsev 10:41552d038a69 353 timeout = BYTE_TIMEOUT;
Zaitsev 10:41552d038a69 354 while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BUSY)) && (--timeout != 0));
Zaitsev 10:41552d038a69 355
Zaitsev 10:41552d038a69 356 #ifdef I2C_IP_VERSION_V1
Zaitsev 10:41552d038a69 357 handle->Init.ClockSpeed = hz;
Zaitsev 10:41552d038a69 358 handle->Init.DutyCycle = I2C_DUTYCYCLE_2;
Zaitsev 10:41552d038a69 359 #endif
Zaitsev 10:41552d038a69 360 #ifdef I2C_IP_VERSION_V2
Zaitsev 10:41552d038a69 361 /* Only predefined timing for below frequencies are supported */
Zaitsev 10:41552d038a69 362 MBED_ASSERT((hz == 100000) || (hz == 400000) || (hz == 1000000));
Zaitsev 10:41552d038a69 363 handle->Init.Timing = get_i2c_timing(hz);
Zaitsev 10:41552d038a69 364
Zaitsev 10:41552d038a69 365 // Enable the Fast Mode Plus capability
Zaitsev 10:41552d038a69 366 if (hz == 1000000) {
Zaitsev 10:41552d038a69 367 #if defined(I2C1_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C1)
Zaitsev 10:41552d038a69 368 if (obj_s->i2c == I2C_1) {
Zaitsev 10:41552d038a69 369 __HAL_SYSCFG_FASTMODEPLUS_ENABLE(I2C_FASTMODEPLUS_I2C1);
Zaitsev 10:41552d038a69 370 }
Zaitsev 10:41552d038a69 371 #endif
Zaitsev 10:41552d038a69 372 #if defined(I2C2_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C2)
Zaitsev 10:41552d038a69 373 if (obj_s->i2c == I2C_2) {
Zaitsev 10:41552d038a69 374 __HAL_SYSCFG_FASTMODEPLUS_ENABLE(I2C_FASTMODEPLUS_I2C2);
Zaitsev 10:41552d038a69 375 }
Zaitsev 10:41552d038a69 376 #endif
Zaitsev 10:41552d038a69 377 #if defined(I2C3_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C3)
Zaitsev 10:41552d038a69 378 if (obj_s->i2c == I2C_3) {
Zaitsev 10:41552d038a69 379 __HAL_SYSCFG_FASTMODEPLUS_ENABLE(I2C_FASTMODEPLUS_I2C3);
Zaitsev 10:41552d038a69 380 }
Zaitsev 10:41552d038a69 381 #endif
Zaitsev 10:41552d038a69 382 #if defined(I2C4_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C4)
Zaitsev 10:41552d038a69 383 if (obj_s->i2c == I2C_4) {
Zaitsev 10:41552d038a69 384 __HAL_SYSCFG_FASTMODEPLUS_ENABLE(I2C_FASTMODEPLUS_I2C4);
Zaitsev 10:41552d038a69 385 }
Zaitsev 10:41552d038a69 386 #endif
Zaitsev 10:41552d038a69 387 }
Zaitsev 10:41552d038a69 388 #endif //I2C_IP_VERSION_V2
Zaitsev 10:41552d038a69 389
Zaitsev 10:41552d038a69 390 /*##-1- Configure the I2C clock source. The clock is derived from the SYSCLK #*/
Zaitsev 10:41552d038a69 391 #if defined(I2C1_BASE) && defined (__HAL_RCC_I2C1_CONFIG)
Zaitsev 10:41552d038a69 392 if (obj_s->i2c == I2C_1) {
Zaitsev 10:41552d038a69 393 __HAL_RCC_I2C1_CONFIG(I2CAPI_I2C1_CLKSRC);
Zaitsev 10:41552d038a69 394 }
Zaitsev 10:41552d038a69 395 #endif
Zaitsev 10:41552d038a69 396 #if defined(I2C2_BASE) && defined(__HAL_RCC_I2C2_CONFIG)
Zaitsev 10:41552d038a69 397 if (obj_s->i2c == I2C_2) {
Zaitsev 10:41552d038a69 398 __HAL_RCC_I2C2_CONFIG(I2CAPI_I2C2_CLKSRC);
Zaitsev 10:41552d038a69 399 }
Zaitsev 10:41552d038a69 400 #endif
Zaitsev 10:41552d038a69 401 #if defined(I2C3_BASE) && defined(__HAL_RCC_I2C3_CONFIG)
Zaitsev 10:41552d038a69 402 if (obj_s->i2c == I2C_3) {
Zaitsev 10:41552d038a69 403 __HAL_RCC_I2C3_CONFIG(I2CAPI_I2C3_CLKSRC);
Zaitsev 10:41552d038a69 404 }
Zaitsev 10:41552d038a69 405 #endif
Zaitsev 10:41552d038a69 406 #if defined(I2C4_BASE) && defined(__HAL_RCC_I2C4_CONFIG)
Zaitsev 10:41552d038a69 407 if (obj_s->i2c == I2C_4) {
Zaitsev 10:41552d038a69 408 __HAL_RCC_I2C4_CONFIG(I2CAPI_I2C4_CLKSRC);
Zaitsev 10:41552d038a69 409 }
Zaitsev 10:41552d038a69 410 #endif
Zaitsev 10:41552d038a69 411
Zaitsev 10:41552d038a69 412 #ifdef I2C_ANALOGFILTER_ENABLE
Zaitsev 10:41552d038a69 413 /* Enable the Analog I2C Filter */
Zaitsev 10:41552d038a69 414 HAL_I2CEx_AnalogFilter_Config(handle,I2C_ANALOGFILTER_ENABLE);
Zaitsev 10:41552d038a69 415 #endif
Zaitsev 10:41552d038a69 416
Zaitsev 10:41552d038a69 417 // I2C configuration
Zaitsev 10:41552d038a69 418 handle->Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
Zaitsev 10:41552d038a69 419 handle->Init.DualAddressMode = I2C_DUALADDRESS_DISABLED;
Zaitsev 10:41552d038a69 420 handle->Init.GeneralCallMode = I2C_GENERALCALL_DISABLED;
Zaitsev 10:41552d038a69 421 handle->Init.NoStretchMode = I2C_NOSTRETCH_DISABLED;
Zaitsev 10:41552d038a69 422 handle->Init.OwnAddress1 = 0;
Zaitsev 10:41552d038a69 423 handle->Init.OwnAddress2 = 0;
Zaitsev 10:41552d038a69 424 HAL_I2C_Init(handle);
Zaitsev 10:41552d038a69 425
Zaitsev 10:41552d038a69 426 /* store frequency for timeout computation */
Zaitsev 10:41552d038a69 427 obj_s->hz = hz;
Zaitsev 10:41552d038a69 428 }
Zaitsev 10:41552d038a69 429
Zaitsev 10:41552d038a69 430 i2c_t *get_i2c_obj(I2C_HandleTypeDef *hi2c){
Zaitsev 10:41552d038a69 431 /* Aim of the function is to get i2c_s pointer using hi2c pointer */
Zaitsev 10:41552d038a69 432 /* Highly inspired from magical linux kernel's "container_of" */
Zaitsev 10:41552d038a69 433 /* (which was not directly used since not compatible with IAR toolchain) */
Zaitsev 10:41552d038a69 434 struct i2c_s *obj_s;
Zaitsev 10:41552d038a69 435 i2c_t *obj;
Zaitsev 10:41552d038a69 436
Zaitsev 10:41552d038a69 437 obj_s = (struct i2c_s *)( (char *)hi2c - offsetof(struct i2c_s,handle));
Zaitsev 10:41552d038a69 438 obj = (i2c_t *)( (char *)obj_s - offsetof(i2c_t,i2c));
Zaitsev 10:41552d038a69 439
Zaitsev 10:41552d038a69 440 return (obj);
Zaitsev 10:41552d038a69 441 }
Zaitsev 10:41552d038a69 442
Zaitsev 10:41552d038a69 443 /*
Zaitsev 10:41552d038a69 444 * UNITARY APIS.
Zaitsev 10:41552d038a69 445 * For very basic operations, direct registers access is needed
Zaitsev 10:41552d038a69 446 * There are 2 different IPs version that need to be supported
Zaitsev 10:41552d038a69 447 */
Zaitsev 10:41552d038a69 448 #ifdef I2C_IP_VERSION_V1
Zaitsev 10:41552d038a69 449 int i2c_start(i2c_t *obj) {
Zaitsev 10:41552d038a69 450
Zaitsev 10:41552d038a69 451 int timeout;
Zaitsev 10:41552d038a69 452 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 453 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 454
Zaitsev 10:41552d038a69 455 // Clear Acknowledge failure flag
Zaitsev 10:41552d038a69 456 __HAL_I2C_CLEAR_FLAG(handle, I2C_FLAG_AF);
Zaitsev 10:41552d038a69 457
Zaitsev 10:41552d038a69 458 // Wait the STOP condition has been previously correctly sent
Zaitsev 10:41552d038a69 459 // This timeout can be avoid in some specific cases by simply clearing the STOP bit
Zaitsev 10:41552d038a69 460 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 461 while ((handle->Instance->CR1 & I2C_CR1_STOP) == I2C_CR1_STOP) {
Zaitsev 10:41552d038a69 462 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 463 return 1;
Zaitsev 10:41552d038a69 464 }
Zaitsev 10:41552d038a69 465 }
Zaitsev 10:41552d038a69 466
Zaitsev 10:41552d038a69 467 // Generate the START condition
Zaitsev 10:41552d038a69 468 handle->Instance->CR1 |= I2C_CR1_START;
Zaitsev 10:41552d038a69 469
Zaitsev 10:41552d038a69 470 // Wait the START condition has been correctly sent
Zaitsev 10:41552d038a69 471 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 472 while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_SB) == RESET) {
Zaitsev 10:41552d038a69 473 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 474 return 1;
Zaitsev 10:41552d038a69 475 }
Zaitsev 10:41552d038a69 476 }
Zaitsev 10:41552d038a69 477
Zaitsev 10:41552d038a69 478 return 0;
Zaitsev 10:41552d038a69 479 }
Zaitsev 10:41552d038a69 480
Zaitsev 10:41552d038a69 481 int i2c_stop(i2c_t *obj) {
Zaitsev 10:41552d038a69 482 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 483 I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c;
Zaitsev 10:41552d038a69 484 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 485 int timeout;
Zaitsev 10:41552d038a69 486
Zaitsev 10:41552d038a69 487 // Generate the STOP condition
Zaitsev 10:41552d038a69 488 i2c->CR1 |= I2C_CR1_STOP;
Zaitsev 10:41552d038a69 489
Zaitsev 10:41552d038a69 490 /* In case of mixed usage of the APIs (unitary + SYNC)
Zaitsev 10:41552d038a69 491 * re-inti HAL state
Zaitsev 10:41552d038a69 492 */
Zaitsev 10:41552d038a69 493 if(obj_s->XferOperation != I2C_FIRST_AND_LAST_FRAME)
Zaitsev 10:41552d038a69 494 i2c_init(obj, obj_s->sda, obj_s->scl);
Zaitsev 10:41552d038a69 495
Zaitsev 10:41552d038a69 496 return 0;
Zaitsev 10:41552d038a69 497 }
Zaitsev 10:41552d038a69 498
Zaitsev 10:41552d038a69 499 int i2c_byte_read(i2c_t *obj, int last) {
Zaitsev 10:41552d038a69 500
Zaitsev 10:41552d038a69 501 int timeout;
Zaitsev 10:41552d038a69 502 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 503 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 504
Zaitsev 10:41552d038a69 505 if (last) {
Zaitsev 10:41552d038a69 506 // Don't acknowledge the last byte
Zaitsev 10:41552d038a69 507 handle->Instance->CR1 &= ~I2C_CR1_ACK;
Zaitsev 10:41552d038a69 508 } else {
Zaitsev 10:41552d038a69 509 // Acknowledge the byte
Zaitsev 10:41552d038a69 510 handle->Instance->CR1 |= I2C_CR1_ACK;
Zaitsev 10:41552d038a69 511 }
Zaitsev 10:41552d038a69 512
Zaitsev 10:41552d038a69 513 // Wait until the byte is received
Zaitsev 10:41552d038a69 514 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 515 while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_RXNE) == RESET) {
Zaitsev 10:41552d038a69 516 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 517 return -1;
Zaitsev 10:41552d038a69 518 }
Zaitsev 10:41552d038a69 519 }
Zaitsev 10:41552d038a69 520
Zaitsev 10:41552d038a69 521 return (int)handle->Instance->DR;
Zaitsev 10:41552d038a69 522 }
Zaitsev 10:41552d038a69 523
Zaitsev 10:41552d038a69 524 int i2c_byte_write(i2c_t *obj, int data) {
Zaitsev 10:41552d038a69 525
Zaitsev 10:41552d038a69 526 int timeout;
Zaitsev 10:41552d038a69 527 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 528 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 529
Zaitsev 10:41552d038a69 530 handle->Instance->DR = (uint8_t)data;
Zaitsev 10:41552d038a69 531
Zaitsev 10:41552d038a69 532 // Wait until the byte (might be the address) is transmitted
Zaitsev 10:41552d038a69 533 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 534 while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TXE) == RESET) &&
Zaitsev 10:41552d038a69 535 (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BTF) == RESET) &&
Zaitsev 10:41552d038a69 536 (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_ADDR) == RESET)) {
Zaitsev 10:41552d038a69 537 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 538 return 0;
Zaitsev 10:41552d038a69 539 }
Zaitsev 10:41552d038a69 540 }
Zaitsev 10:41552d038a69 541
Zaitsev 10:41552d038a69 542 if (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_ADDR) != RESET)
Zaitsev 10:41552d038a69 543 {
Zaitsev 10:41552d038a69 544 __HAL_I2C_CLEAR_ADDRFLAG(handle);
Zaitsev 10:41552d038a69 545 }
Zaitsev 10:41552d038a69 546
Zaitsev 10:41552d038a69 547 return 1;
Zaitsev 10:41552d038a69 548 }
Zaitsev 10:41552d038a69 549 #endif //I2C_IP_VERSION_V1
Zaitsev 10:41552d038a69 550 #ifdef I2C_IP_VERSION_V2
Zaitsev 10:41552d038a69 551 int i2c_start(i2c_t *obj) {
Zaitsev 10:41552d038a69 552 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 553 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 554 I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c;
Zaitsev 10:41552d038a69 555 int timeout;
Zaitsev 10:41552d038a69 556
Zaitsev 10:41552d038a69 557 // Clear Acknowledge failure flag
Zaitsev 10:41552d038a69 558 __HAL_I2C_CLEAR_FLAG(handle, I2C_FLAG_AF);
Zaitsev 10:41552d038a69 559
Zaitsev 10:41552d038a69 560 // Wait the STOP condition has been previously correctly sent
Zaitsev 10:41552d038a69 561 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 562 while ((i2c->CR2 & I2C_CR2_STOP) == I2C_CR2_STOP){
Zaitsev 10:41552d038a69 563 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 564 return 1;
Zaitsev 10:41552d038a69 565 }
Zaitsev 10:41552d038a69 566 }
Zaitsev 10:41552d038a69 567
Zaitsev 10:41552d038a69 568 // Generate the START condition
Zaitsev 10:41552d038a69 569 i2c->CR2 |= I2C_CR2_START;
Zaitsev 10:41552d038a69 570
Zaitsev 10:41552d038a69 571 // Wait the START condition has been correctly sent
Zaitsev 10:41552d038a69 572 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 573 while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BUSY) == RESET) {
Zaitsev 10:41552d038a69 574 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 575 return 1;
Zaitsev 10:41552d038a69 576 }
Zaitsev 10:41552d038a69 577 }
Zaitsev 10:41552d038a69 578
Zaitsev 10:41552d038a69 579 return 0;
Zaitsev 10:41552d038a69 580 }
Zaitsev 10:41552d038a69 581
Zaitsev 10:41552d038a69 582 int i2c_stop(i2c_t *obj) {
Zaitsev 10:41552d038a69 583 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 584 I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c;
Zaitsev 10:41552d038a69 585
Zaitsev 10:41552d038a69 586 // Generate the STOP condition
Zaitsev 10:41552d038a69 587 i2c->CR2 |= I2C_CR2_STOP;
Zaitsev 10:41552d038a69 588
Zaitsev 10:41552d038a69 589 return 0;
Zaitsev 10:41552d038a69 590 }
Zaitsev 10:41552d038a69 591
Zaitsev 10:41552d038a69 592 int i2c_byte_read(i2c_t *obj, int last) {
Zaitsev 10:41552d038a69 593 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 594 I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c;
Zaitsev 10:41552d038a69 595 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 596 int timeout;
Zaitsev 10:41552d038a69 597
Zaitsev 10:41552d038a69 598 // Wait until the byte is received
Zaitsev 10:41552d038a69 599 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 600 while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_RXNE) == RESET) {
Zaitsev 10:41552d038a69 601 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 602 return -1;
Zaitsev 10:41552d038a69 603 }
Zaitsev 10:41552d038a69 604 }
Zaitsev 10:41552d038a69 605
Zaitsev 10:41552d038a69 606 return (int)i2c->RXDR;
Zaitsev 10:41552d038a69 607 }
Zaitsev 10:41552d038a69 608
Zaitsev 10:41552d038a69 609 int i2c_byte_write(i2c_t *obj, int data) {
Zaitsev 10:41552d038a69 610 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 611 I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c;
Zaitsev 10:41552d038a69 612 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 613 int timeout;
Zaitsev 10:41552d038a69 614
Zaitsev 10:41552d038a69 615 // Wait until the previous byte is transmitted
Zaitsev 10:41552d038a69 616 timeout = FLAG_TIMEOUT;
Zaitsev 10:41552d038a69 617 while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TXIS) == RESET) {
Zaitsev 10:41552d038a69 618 if ((timeout--) == 0) {
Zaitsev 10:41552d038a69 619 return 0;
Zaitsev 10:41552d038a69 620 }
Zaitsev 10:41552d038a69 621 }
Zaitsev 10:41552d038a69 622
Zaitsev 10:41552d038a69 623 i2c->TXDR = (uint8_t)data;
Zaitsev 10:41552d038a69 624
Zaitsev 10:41552d038a69 625 return 1;
Zaitsev 10:41552d038a69 626 }
Zaitsev 10:41552d038a69 627 #endif //I2C_IP_VERSION_V2
Zaitsev 10:41552d038a69 628
Zaitsev 10:41552d038a69 629 void i2c_reset(i2c_t *obj) {
Zaitsev 10:41552d038a69 630 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 631 /* As recommended in i2c_api.h, mainly send stop */
Zaitsev 10:41552d038a69 632 i2c_stop(obj);
Zaitsev 10:41552d038a69 633 /* then re-init */
Zaitsev 10:41552d038a69 634 i2c_init(obj, obj_s->sda, obj_s->scl);
Zaitsev 10:41552d038a69 635 }
Zaitsev 10:41552d038a69 636
Zaitsev 10:41552d038a69 637 /*
Zaitsev 10:41552d038a69 638 * SYNC APIS
Zaitsev 10:41552d038a69 639 */
Zaitsev 10:41552d038a69 640 int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
Zaitsev 10:41552d038a69 641 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 642 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 643 int count = I2C_ERROR_BUS_BUSY, ret = 0;
Zaitsev 10:41552d038a69 644 uint32_t timeout = 0;
Zaitsev 10:41552d038a69 645
Zaitsev 10:41552d038a69 646 if((length == 0) || (data == 0)) {
Zaitsev 10:41552d038a69 647 if(HAL_I2C_IsDeviceReady(handle, address, 1, 10) == HAL_OK)
Zaitsev 10:41552d038a69 648 return 0;
Zaitsev 10:41552d038a69 649 else
Zaitsev 10:41552d038a69 650 return I2C_ERROR_BUS_BUSY;
Zaitsev 10:41552d038a69 651 }
Zaitsev 10:41552d038a69 652
Zaitsev 10:41552d038a69 653 if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
Zaitsev 10:41552d038a69 654 (obj_s->XferOperation == I2C_LAST_FRAME)) {
Zaitsev 10:41552d038a69 655 if (stop)
Zaitsev 10:41552d038a69 656 obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME;
Zaitsev 10:41552d038a69 657 else
Zaitsev 10:41552d038a69 658 obj_s->XferOperation = I2C_FIRST_FRAME;
Zaitsev 10:41552d038a69 659 } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) ||
Zaitsev 10:41552d038a69 660 (obj_s->XferOperation == I2C_NEXT_FRAME)) {
Zaitsev 10:41552d038a69 661 if (stop)
Zaitsev 10:41552d038a69 662 obj_s->XferOperation = I2C_LAST_FRAME;
Zaitsev 10:41552d038a69 663 else
Zaitsev 10:41552d038a69 664 obj_s->XferOperation = I2C_NEXT_FRAME;
Zaitsev 10:41552d038a69 665 }
Zaitsev 10:41552d038a69 666
Zaitsev 10:41552d038a69 667 obj_s->event = 0;
Zaitsev 10:41552d038a69 668
Zaitsev 10:41552d038a69 669 /* Activate default IRQ handlers for sync mode
Zaitsev 10:41552d038a69 670 * which would be overwritten in async mode
Zaitsev 10:41552d038a69 671 */
Zaitsev 10:41552d038a69 672 i2c_ev_err_enable(obj, i2c_get_irq_handler(obj));
Zaitsev 10:41552d038a69 673
Zaitsev 10:41552d038a69 674 ret = HAL_I2C_Master_Sequential_Receive_IT(handle, address, (uint8_t *) data, length, obj_s->XferOperation);
Zaitsev 10:41552d038a69 675
Zaitsev 10:41552d038a69 676 if(ret == HAL_OK) {
Zaitsev 10:41552d038a69 677 timeout = BYTE_TIMEOUT_US * (length + 1);
Zaitsev 10:41552d038a69 678 /* transfer started : wait completion or timeout */
Zaitsev 10:41552d038a69 679 while(!(obj_s->event & I2C_EVENT_ALL) && (--timeout != 0)) {
Zaitsev 10:41552d038a69 680 wait_us(1);
Zaitsev 10:41552d038a69 681 }
Zaitsev 10:41552d038a69 682
Zaitsev 10:41552d038a69 683 i2c_ev_err_disable(obj);
Zaitsev 10:41552d038a69 684
Zaitsev 10:41552d038a69 685 if((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) {
Zaitsev 10:41552d038a69 686 DEBUG_PRINTF(" TIMEOUT or error in i2c_read\r\n");
Zaitsev 10:41552d038a69 687 /* re-init IP to try and get back in a working state */
Zaitsev 10:41552d038a69 688 i2c_init(obj, obj_s->sda, obj_s->scl);
Zaitsev 10:41552d038a69 689 } else {
Zaitsev 10:41552d038a69 690 count = length;
Zaitsev 10:41552d038a69 691 }
Zaitsev 10:41552d038a69 692 } else {
Zaitsev 10:41552d038a69 693 DEBUG_PRINTF("ERROR in i2c_read:%d\r\n", ret);
Zaitsev 10:41552d038a69 694 }
Zaitsev 10:41552d038a69 695
Zaitsev 10:41552d038a69 696 return count;
Zaitsev 10:41552d038a69 697 }
Zaitsev 10:41552d038a69 698
Zaitsev 10:41552d038a69 699 int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
Zaitsev 10:41552d038a69 700 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 701 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 702 int count = I2C_ERROR_BUS_BUSY, ret = 0;
Zaitsev 10:41552d038a69 703 uint32_t timeout = 0;
Zaitsev 10:41552d038a69 704
Zaitsev 10:41552d038a69 705 if((length == 0) || (data == 0)) {
Zaitsev 10:41552d038a69 706 if(HAL_I2C_IsDeviceReady(handle, address, 1, 10) == HAL_OK)
Zaitsev 10:41552d038a69 707 return 0;
Zaitsev 10:41552d038a69 708 else
Zaitsev 10:41552d038a69 709 return I2C_ERROR_BUS_BUSY;
Zaitsev 10:41552d038a69 710 }
Zaitsev 10:41552d038a69 711
Zaitsev 10:41552d038a69 712 if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
Zaitsev 10:41552d038a69 713 (obj_s->XferOperation == I2C_LAST_FRAME)) {
Zaitsev 10:41552d038a69 714 if (stop)
Zaitsev 10:41552d038a69 715 obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME;
Zaitsev 10:41552d038a69 716 else
Zaitsev 10:41552d038a69 717 obj_s->XferOperation = I2C_FIRST_FRAME;
Zaitsev 10:41552d038a69 718 } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) ||
Zaitsev 10:41552d038a69 719 (obj_s->XferOperation == I2C_NEXT_FRAME)) {
Zaitsev 10:41552d038a69 720 if (stop)
Zaitsev 10:41552d038a69 721 obj_s->XferOperation = I2C_LAST_FRAME;
Zaitsev 10:41552d038a69 722 else
Zaitsev 10:41552d038a69 723 obj_s->XferOperation = I2C_NEXT_FRAME;
Zaitsev 10:41552d038a69 724 }
Zaitsev 10:41552d038a69 725
Zaitsev 10:41552d038a69 726 obj_s->event = 0;
Zaitsev 10:41552d038a69 727
Zaitsev 10:41552d038a69 728 i2c_ev_err_enable(obj, i2c_get_irq_handler(obj));
Zaitsev 10:41552d038a69 729
Zaitsev 10:41552d038a69 730 ret = HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t *) data, length, obj_s->XferOperation);
Zaitsev 10:41552d038a69 731
Zaitsev 10:41552d038a69 732 if(ret == HAL_OK) {
Zaitsev 10:41552d038a69 733 timeout = BYTE_TIMEOUT_US * (length + 1);
Zaitsev 10:41552d038a69 734 /* transfer started : wait completion or timeout */
Zaitsev 10:41552d038a69 735 while(!(obj_s->event & I2C_EVENT_ALL) && (--timeout != 0)) {
Zaitsev 10:41552d038a69 736 wait_us(1);
Zaitsev 10:41552d038a69 737 }
Zaitsev 10:41552d038a69 738
Zaitsev 10:41552d038a69 739 i2c_ev_err_disable(obj);
Zaitsev 10:41552d038a69 740
Zaitsev 10:41552d038a69 741 if((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) {
Zaitsev 10:41552d038a69 742 DEBUG_PRINTF(" TIMEOUT or error in i2c_write\r\n");
Zaitsev 10:41552d038a69 743 /* re-init IP to try and get back in a working state */
Zaitsev 10:41552d038a69 744 i2c_init(obj, obj_s->sda, obj_s->scl);
Zaitsev 10:41552d038a69 745 } else {
Zaitsev 10:41552d038a69 746 count = length;
Zaitsev 10:41552d038a69 747 }
Zaitsev 10:41552d038a69 748 } else {
Zaitsev 10:41552d038a69 749 DEBUG_PRINTF("ERROR in i2c_read\r\n");
Zaitsev 10:41552d038a69 750 }
Zaitsev 10:41552d038a69 751
Zaitsev 10:41552d038a69 752 return count;
Zaitsev 10:41552d038a69 753 }
Zaitsev 10:41552d038a69 754
Zaitsev 10:41552d038a69 755 void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c){
Zaitsev 10:41552d038a69 756 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 757 i2c_t *obj = get_i2c_obj(hi2c);
Zaitsev 10:41552d038a69 758 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 759
Zaitsev 10:41552d038a69 760 #if DEVICE_I2C_ASYNCH
Zaitsev 10:41552d038a69 761 /* Handle potential Tx/Rx use case */
Zaitsev 10:41552d038a69 762 if ((obj->tx_buff.length) && (obj->rx_buff.length)) {
Zaitsev 10:41552d038a69 763 if (obj_s->stop) {
Zaitsev 10:41552d038a69 764 obj_s->XferOperation = I2C_LAST_FRAME;
Zaitsev 10:41552d038a69 765 } else {
Zaitsev 10:41552d038a69 766 obj_s->XferOperation = I2C_NEXT_FRAME;
Zaitsev 10:41552d038a69 767 }
Zaitsev 10:41552d038a69 768
Zaitsev 10:41552d038a69 769 HAL_I2C_Master_Sequential_Receive_IT(hi2c, obj_s->address, (uint8_t*)obj->rx_buff.buffer , obj->rx_buff.length, obj_s->XferOperation);
Zaitsev 10:41552d038a69 770 }
Zaitsev 10:41552d038a69 771 else
Zaitsev 10:41552d038a69 772 #endif
Zaitsev 10:41552d038a69 773 {
Zaitsev 10:41552d038a69 774 /* Set event flag */
Zaitsev 10:41552d038a69 775 obj_s->event = I2C_EVENT_TRANSFER_COMPLETE;
Zaitsev 10:41552d038a69 776 }
Zaitsev 10:41552d038a69 777 }
Zaitsev 10:41552d038a69 778
Zaitsev 10:41552d038a69 779 void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *hi2c){
Zaitsev 10:41552d038a69 780 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 781 i2c_t *obj = get_i2c_obj(hi2c);
Zaitsev 10:41552d038a69 782 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 783
Zaitsev 10:41552d038a69 784 /* Set event flag */
Zaitsev 10:41552d038a69 785 obj_s->event = I2C_EVENT_TRANSFER_COMPLETE;
Zaitsev 10:41552d038a69 786 }
Zaitsev 10:41552d038a69 787
Zaitsev 10:41552d038a69 788 void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c){
Zaitsev 10:41552d038a69 789 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 790 i2c_t *obj = get_i2c_obj(hi2c);
Zaitsev 10:41552d038a69 791 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 792 #if DEVICE_I2CSLAVE
Zaitsev 10:41552d038a69 793 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 794 uint32_t address = 0;
Zaitsev 10:41552d038a69 795 /* Store address to handle it after reset */
Zaitsev 10:41552d038a69 796 if(obj_s->slave)
Zaitsev 10:41552d038a69 797 address = handle->Init.OwnAddress1;
Zaitsev 10:41552d038a69 798 #endif
Zaitsev 10:41552d038a69 799
Zaitsev 10:41552d038a69 800 DEBUG_PRINTF("HAL_I2C_ErrorCallback:%d, index=%d\r\n", (int) hi2c->ErrorCode, obj_s->index);
Zaitsev 10:41552d038a69 801
Zaitsev 10:41552d038a69 802 /* re-init IP to try and get back in a working state */
Zaitsev 10:41552d038a69 803 i2c_init(obj, obj_s->sda, obj_s->scl);
Zaitsev 10:41552d038a69 804
Zaitsev 10:41552d038a69 805 #if DEVICE_I2CSLAVE
Zaitsev 10:41552d038a69 806 /* restore slave address */
Zaitsev 10:41552d038a69 807 i2c_slave_address(obj, 0, address, 0);
Zaitsev 10:41552d038a69 808 #endif
Zaitsev 10:41552d038a69 809
Zaitsev 10:41552d038a69 810 /* Keep Set event flag */
Zaitsev 10:41552d038a69 811 obj_s->event = I2C_EVENT_ERROR;
Zaitsev 10:41552d038a69 812 }
Zaitsev 10:41552d038a69 813
Zaitsev 10:41552d038a69 814 #if DEVICE_I2CSLAVE
Zaitsev 10:41552d038a69 815 /* SLAVE API FUNCTIONS */
Zaitsev 10:41552d038a69 816 void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) {
Zaitsev 10:41552d038a69 817 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 818 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 819
Zaitsev 10:41552d038a69 820 // I2C configuration
Zaitsev 10:41552d038a69 821 handle->Init.OwnAddress1 = address;
Zaitsev 10:41552d038a69 822 HAL_I2C_Init(handle);
Zaitsev 10:41552d038a69 823
Zaitsev 10:41552d038a69 824 i2c_ev_err_enable(obj, i2c_get_irq_handler(obj));
Zaitsev 10:41552d038a69 825
Zaitsev 10:41552d038a69 826 HAL_I2C_EnableListen_IT(handle);
Zaitsev 10:41552d038a69 827 }
Zaitsev 10:41552d038a69 828
Zaitsev 10:41552d038a69 829 void i2c_slave_mode(i2c_t *obj, int enable_slave) {
Zaitsev 10:41552d038a69 830
Zaitsev 10:41552d038a69 831 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 832 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 833
Zaitsev 10:41552d038a69 834 if (enable_slave) {
Zaitsev 10:41552d038a69 835 obj_s->slave = 1;
Zaitsev 10:41552d038a69 836 HAL_I2C_EnableListen_IT(handle);
Zaitsev 10:41552d038a69 837 } else {
Zaitsev 10:41552d038a69 838 obj_s->slave = 0;
Zaitsev 10:41552d038a69 839 HAL_I2C_DisableListen_IT(handle);
Zaitsev 10:41552d038a69 840 }
Zaitsev 10:41552d038a69 841 }
Zaitsev 10:41552d038a69 842
Zaitsev 10:41552d038a69 843 // See I2CSlave.h
Zaitsev 10:41552d038a69 844 #define NoData 0 // the slave has not been addressed
Zaitsev 10:41552d038a69 845 #define ReadAddressed 1 // the master has requested a read from this slave (slave = transmitter)
Zaitsev 10:41552d038a69 846 #define WriteGeneral 2 // the master is writing to all slave
Zaitsev 10:41552d038a69 847 #define WriteAddressed 3 // the master is writing to this slave (slave = receiver)
Zaitsev 10:41552d038a69 848
Zaitsev 10:41552d038a69 849
Zaitsev 10:41552d038a69 850 void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode) {
Zaitsev 10:41552d038a69 851 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 852 i2c_t *obj = get_i2c_obj(hi2c);
Zaitsev 10:41552d038a69 853 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 854
Zaitsev 10:41552d038a69 855 /* Transfer direction in HAL is from Master point of view */
Zaitsev 10:41552d038a69 856 if(TransferDirection == I2C_DIRECTION_RECEIVE) {
Zaitsev 10:41552d038a69 857 obj_s->pending_slave_tx_master_rx = 1;
Zaitsev 10:41552d038a69 858 }
Zaitsev 10:41552d038a69 859
Zaitsev 10:41552d038a69 860 if(TransferDirection == I2C_DIRECTION_TRANSMIT) {
Zaitsev 10:41552d038a69 861 obj_s->pending_slave_rx_maxter_tx = 1;
Zaitsev 10:41552d038a69 862 }
Zaitsev 10:41552d038a69 863 }
Zaitsev 10:41552d038a69 864
Zaitsev 10:41552d038a69 865 void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *I2cHandle){
Zaitsev 10:41552d038a69 866 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 867 i2c_t *obj = get_i2c_obj(I2cHandle);
Zaitsev 10:41552d038a69 868 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 869 obj_s->pending_slave_tx_master_rx = 0;
Zaitsev 10:41552d038a69 870 }
Zaitsev 10:41552d038a69 871
Zaitsev 10:41552d038a69 872 void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *I2cHandle){
Zaitsev 10:41552d038a69 873 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 874 i2c_t *obj = get_i2c_obj(I2cHandle);
Zaitsev 10:41552d038a69 875 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 876 obj_s->pending_slave_rx_maxter_tx = 0;
Zaitsev 10:41552d038a69 877 }
Zaitsev 10:41552d038a69 878
Zaitsev 10:41552d038a69 879 void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)
Zaitsev 10:41552d038a69 880 {
Zaitsev 10:41552d038a69 881 /* restart listening for master requests */
Zaitsev 10:41552d038a69 882 HAL_I2C_EnableListen_IT(hi2c);
Zaitsev 10:41552d038a69 883 }
Zaitsev 10:41552d038a69 884
Zaitsev 10:41552d038a69 885 int i2c_slave_receive(i2c_t *obj) {
Zaitsev 10:41552d038a69 886
Zaitsev 10:41552d038a69 887 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 888 int retValue = NoData;
Zaitsev 10:41552d038a69 889
Zaitsev 10:41552d038a69 890 if(obj_s->pending_slave_rx_maxter_tx) {
Zaitsev 10:41552d038a69 891 retValue = WriteAddressed;
Zaitsev 10:41552d038a69 892 }
Zaitsev 10:41552d038a69 893
Zaitsev 10:41552d038a69 894 if(obj_s->pending_slave_tx_master_rx) {
Zaitsev 10:41552d038a69 895 retValue = ReadAddressed;
Zaitsev 10:41552d038a69 896 }
Zaitsev 10:41552d038a69 897
Zaitsev 10:41552d038a69 898 return (retValue);
Zaitsev 10:41552d038a69 899 }
Zaitsev 10:41552d038a69 900
Zaitsev 10:41552d038a69 901 int i2c_slave_read(i2c_t *obj, char *data, int length) {
Zaitsev 10:41552d038a69 902 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 903 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 904 int count = 0;
Zaitsev 10:41552d038a69 905 int ret = 0;
Zaitsev 10:41552d038a69 906 uint32_t timeout = 0;
Zaitsev 10:41552d038a69 907
Zaitsev 10:41552d038a69 908 /* Always use I2C_NEXT_FRAME as slave will just adapt to master requests */
Zaitsev 10:41552d038a69 909 ret = HAL_I2C_Slave_Sequential_Receive_IT(handle, (uint8_t *) data, length, I2C_NEXT_FRAME);
Zaitsev 10:41552d038a69 910
Zaitsev 10:41552d038a69 911 if(ret == HAL_OK) {
Zaitsev 10:41552d038a69 912 timeout = BYTE_TIMEOUT_US * (length + 1);
Zaitsev 10:41552d038a69 913 while(obj_s->pending_slave_rx_maxter_tx && (--timeout != 0)) {
Zaitsev 10:41552d038a69 914 wait_us(1);
Zaitsev 10:41552d038a69 915 }
Zaitsev 10:41552d038a69 916
Zaitsev 10:41552d038a69 917 if(timeout != 0) {
Zaitsev 10:41552d038a69 918 count = length;
Zaitsev 10:41552d038a69 919 } else {
Zaitsev 10:41552d038a69 920 DEBUG_PRINTF("TIMEOUT or error in i2c_slave_read\r\n");
Zaitsev 10:41552d038a69 921 }
Zaitsev 10:41552d038a69 922 }
Zaitsev 10:41552d038a69 923 return count;
Zaitsev 10:41552d038a69 924 }
Zaitsev 10:41552d038a69 925
Zaitsev 10:41552d038a69 926 int i2c_slave_write(i2c_t *obj, const char *data, int length) {
Zaitsev 10:41552d038a69 927 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 928 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 929 int count = 0;
Zaitsev 10:41552d038a69 930 int ret = 0;
Zaitsev 10:41552d038a69 931 uint32_t timeout = 0;
Zaitsev 10:41552d038a69 932
Zaitsev 10:41552d038a69 933 /* Always use I2C_NEXT_FRAME as slave will just adapt to master requests */
Zaitsev 10:41552d038a69 934 ret = HAL_I2C_Slave_Sequential_Transmit_IT(handle, (uint8_t *) data, length, I2C_NEXT_FRAME);
Zaitsev 10:41552d038a69 935
Zaitsev 10:41552d038a69 936 if(ret == HAL_OK) {
Zaitsev 10:41552d038a69 937 timeout = BYTE_TIMEOUT_US * (length + 1);
Zaitsev 10:41552d038a69 938 while(obj_s->pending_slave_tx_master_rx && (--timeout != 0)) {
Zaitsev 10:41552d038a69 939 wait_us(1);
Zaitsev 10:41552d038a69 940 }
Zaitsev 10:41552d038a69 941
Zaitsev 10:41552d038a69 942 if(timeout != 0) {
Zaitsev 10:41552d038a69 943 count = length;
Zaitsev 10:41552d038a69 944 } else {
Zaitsev 10:41552d038a69 945 DEBUG_PRINTF("TIMEOUT or error in i2c_slave_write\r\n");
Zaitsev 10:41552d038a69 946 }
Zaitsev 10:41552d038a69 947 }
Zaitsev 10:41552d038a69 948
Zaitsev 10:41552d038a69 949 return count;
Zaitsev 10:41552d038a69 950 }
Zaitsev 10:41552d038a69 951 #endif // DEVICE_I2CSLAVE
Zaitsev 10:41552d038a69 952
Zaitsev 10:41552d038a69 953 #if DEVICE_I2C_ASYNCH
Zaitsev 10:41552d038a69 954 /* ASYNCH MASTER API FUNCTIONS */
Zaitsev 10:41552d038a69 955 void HAL_I2C_AbortCpltCallback(I2C_HandleTypeDef *hi2c){
Zaitsev 10:41552d038a69 956 /* Get object ptr based on handler ptr */
Zaitsev 10:41552d038a69 957 i2c_t *obj = get_i2c_obj(hi2c);
Zaitsev 10:41552d038a69 958 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 959 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 960
Zaitsev 10:41552d038a69 961 /* Disable IT. Not always done before calling macro */
Zaitsev 10:41552d038a69 962 __HAL_I2C_DISABLE_IT(handle, I2C_IT_ALL);
Zaitsev 10:41552d038a69 963 i2c_ev_err_disable(obj);
Zaitsev 10:41552d038a69 964
Zaitsev 10:41552d038a69 965 /* Set event flag */
Zaitsev 10:41552d038a69 966 obj_s->event = I2C_EVENT_ERROR;
Zaitsev 10:41552d038a69 967 }
Zaitsev 10:41552d038a69 968
Zaitsev 10:41552d038a69 969 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) {
Zaitsev 10:41552d038a69 970
Zaitsev 10:41552d038a69 971 // TODO: DMA usage is currently ignored by this way
Zaitsev 10:41552d038a69 972 (void) hint;
Zaitsev 10:41552d038a69 973
Zaitsev 10:41552d038a69 974 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 975 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 976
Zaitsev 10:41552d038a69 977 /* Update object */
Zaitsev 10:41552d038a69 978 obj->tx_buff.buffer = (void *)tx;
Zaitsev 10:41552d038a69 979 obj->tx_buff.length = tx_length;
Zaitsev 10:41552d038a69 980 obj->tx_buff.pos = 0;
Zaitsev 10:41552d038a69 981 obj->tx_buff.width = 8;
Zaitsev 10:41552d038a69 982
Zaitsev 10:41552d038a69 983 obj->rx_buff.buffer = (void *)rx;
Zaitsev 10:41552d038a69 984 obj->rx_buff.length = rx_length;
Zaitsev 10:41552d038a69 985 obj->rx_buff.pos = SIZE_MAX;
Zaitsev 10:41552d038a69 986 obj->rx_buff.width = 8;
Zaitsev 10:41552d038a69 987
Zaitsev 10:41552d038a69 988 obj_s->available_events = event;
Zaitsev 10:41552d038a69 989 obj_s->event = 0;
Zaitsev 10:41552d038a69 990 obj_s->address = address;
Zaitsev 10:41552d038a69 991 obj_s->stop = stop;
Zaitsev 10:41552d038a69 992
Zaitsev 10:41552d038a69 993 i2c_ev_err_enable(obj, handler);
Zaitsev 10:41552d038a69 994
Zaitsev 10:41552d038a69 995 /* Set operation step depending if stop sending required or not */
Zaitsev 10:41552d038a69 996 if ((tx_length && !rx_length) || (!tx_length && rx_length)) {
Zaitsev 10:41552d038a69 997 if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
Zaitsev 10:41552d038a69 998 (obj_s->XferOperation == I2C_LAST_FRAME)) {
Zaitsev 10:41552d038a69 999 if (stop)
Zaitsev 10:41552d038a69 1000 obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME;
Zaitsev 10:41552d038a69 1001 else
Zaitsev 10:41552d038a69 1002 obj_s->XferOperation = I2C_FIRST_FRAME;
Zaitsev 10:41552d038a69 1003 } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) ||
Zaitsev 10:41552d038a69 1004 (obj_s->XferOperation == I2C_NEXT_FRAME)) {
Zaitsev 10:41552d038a69 1005 if (stop)
Zaitsev 10:41552d038a69 1006 obj_s->XferOperation = I2C_LAST_FRAME;
Zaitsev 10:41552d038a69 1007 else
Zaitsev 10:41552d038a69 1008 obj_s->XferOperation = I2C_NEXT_FRAME;
Zaitsev 10:41552d038a69 1009 }
Zaitsev 10:41552d038a69 1010
Zaitsev 10:41552d038a69 1011 if (tx_length > 0) {
Zaitsev 10:41552d038a69 1012 HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t*)tx, tx_length, obj_s->XferOperation);
Zaitsev 10:41552d038a69 1013 }
Zaitsev 10:41552d038a69 1014 if (rx_length > 0) {
Zaitsev 10:41552d038a69 1015 HAL_I2C_Master_Sequential_Receive_IT(handle, address, (uint8_t*)rx, rx_length, obj_s->XferOperation);
Zaitsev 10:41552d038a69 1016 }
Zaitsev 10:41552d038a69 1017 }
Zaitsev 10:41552d038a69 1018 else if (tx_length && rx_length) {
Zaitsev 10:41552d038a69 1019 /* Two steps operation, don't modify XferOperation, keep it for next step */
Zaitsev 10:41552d038a69 1020 if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
Zaitsev 10:41552d038a69 1021 (obj_s->XferOperation == I2C_LAST_FRAME)) {
Zaitsev 10:41552d038a69 1022 HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t*)tx, tx_length, I2C_FIRST_FRAME);
Zaitsev 10:41552d038a69 1023 } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) ||
Zaitsev 10:41552d038a69 1024 (obj_s->XferOperation == I2C_NEXT_FRAME)) {
Zaitsev 10:41552d038a69 1025 HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t*)tx, tx_length, I2C_NEXT_FRAME);
Zaitsev 10:41552d038a69 1026 }
Zaitsev 10:41552d038a69 1027 }
Zaitsev 10:41552d038a69 1028 }
Zaitsev 10:41552d038a69 1029
Zaitsev 10:41552d038a69 1030
Zaitsev 10:41552d038a69 1031 uint32_t i2c_irq_handler_asynch(i2c_t *obj) {
Zaitsev 10:41552d038a69 1032
Zaitsev 10:41552d038a69 1033 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 1034 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 1035
Zaitsev 10:41552d038a69 1036 HAL_I2C_EV_IRQHandler(handle);
Zaitsev 10:41552d038a69 1037 HAL_I2C_ER_IRQHandler(handle);
Zaitsev 10:41552d038a69 1038
Zaitsev 10:41552d038a69 1039 /* Return I2C event status */
Zaitsev 10:41552d038a69 1040 return (obj_s->event & obj_s->available_events);
Zaitsev 10:41552d038a69 1041 }
Zaitsev 10:41552d038a69 1042
Zaitsev 10:41552d038a69 1043 uint8_t i2c_active(i2c_t *obj) {
Zaitsev 10:41552d038a69 1044
Zaitsev 10:41552d038a69 1045 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 1046 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 1047
Zaitsev 10:41552d038a69 1048 if (handle->State == HAL_I2C_STATE_READY) {
Zaitsev 10:41552d038a69 1049 return 0;
Zaitsev 10:41552d038a69 1050 }
Zaitsev 10:41552d038a69 1051 else {
Zaitsev 10:41552d038a69 1052 return 1;
Zaitsev 10:41552d038a69 1053 }
Zaitsev 10:41552d038a69 1054 }
Zaitsev 10:41552d038a69 1055
Zaitsev 10:41552d038a69 1056 void i2c_abort_asynch(i2c_t *obj) {
Zaitsev 10:41552d038a69 1057
Zaitsev 10:41552d038a69 1058 struct i2c_s *obj_s = I2C_S(obj);
Zaitsev 10:41552d038a69 1059 I2C_HandleTypeDef *handle = &(obj_s->handle);
Zaitsev 10:41552d038a69 1060
Zaitsev 10:41552d038a69 1061 /* Abort HAL requires DevAddress, but is not used. Use Dummy */
Zaitsev 10:41552d038a69 1062 uint16_t Dummy_DevAddress = 0x00;
Zaitsev 10:41552d038a69 1063
Zaitsev 10:41552d038a69 1064 HAL_I2C_Master_Abort_IT(handle, Dummy_DevAddress);
Zaitsev 10:41552d038a69 1065 }
Zaitsev 10:41552d038a69 1066
Zaitsev 10:41552d038a69 1067 #endif // DEVICE_I2C_ASYNCH
Zaitsev 10:41552d038a69 1068
Zaitsev 10:41552d038a69 1069 #endif // DEVICE_I2C