Initial commit
mbed-dev-master/targets/TARGET_STM/i2c_api.c@0:bb348c97df44, 2020-09-16 (annotated)
- Committer:
- lypinator
- Date:
- Wed Sep 16 01:11:49 2020 +0000
- Revision:
- 0:bb348c97df44
Added PWM
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
lypinator | 0:bb348c97df44 | 1 | /* mbed Microcontroller Library |
lypinator | 0:bb348c97df44 | 2 | ******************************************************************************* |
lypinator | 0:bb348c97df44 | 3 | * Copyright (c) 2015, STMicroelectronics |
lypinator | 0:bb348c97df44 | 4 | * All rights reserved. |
lypinator | 0:bb348c97df44 | 5 | * |
lypinator | 0:bb348c97df44 | 6 | * Redistribution and use in source and binary forms, with or without |
lypinator | 0:bb348c97df44 | 7 | * modification, are permitted provided that the following conditions are met: |
lypinator | 0:bb348c97df44 | 8 | * |
lypinator | 0:bb348c97df44 | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
lypinator | 0:bb348c97df44 | 10 | * this list of conditions and the following disclaimer. |
lypinator | 0:bb348c97df44 | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
lypinator | 0:bb348c97df44 | 12 | * this list of conditions and the following disclaimer in the documentation |
lypinator | 0:bb348c97df44 | 13 | * and/or other materials provided with the distribution. |
lypinator | 0:bb348c97df44 | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
lypinator | 0:bb348c97df44 | 15 | * may be used to endorse or promote products derived from this software |
lypinator | 0:bb348c97df44 | 16 | * without specific prior written permission. |
lypinator | 0:bb348c97df44 | 17 | * |
lypinator | 0:bb348c97df44 | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
lypinator | 0:bb348c97df44 | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
lypinator | 0:bb348c97df44 | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
lypinator | 0:bb348c97df44 | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
lypinator | 0:bb348c97df44 | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
lypinator | 0:bb348c97df44 | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
lypinator | 0:bb348c97df44 | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
lypinator | 0:bb348c97df44 | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
lypinator | 0:bb348c97df44 | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
lypinator | 0:bb348c97df44 | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
lypinator | 0:bb348c97df44 | 28 | ******************************************************************************* |
lypinator | 0:bb348c97df44 | 29 | */ |
lypinator | 0:bb348c97df44 | 30 | |
lypinator | 0:bb348c97df44 | 31 | |
lypinator | 0:bb348c97df44 | 32 | #include "mbed_assert.h" |
lypinator | 0:bb348c97df44 | 33 | #include "i2c_api.h" |
lypinator | 0:bb348c97df44 | 34 | #include "platform/mbed_wait_api.h" |
lypinator | 0:bb348c97df44 | 35 | |
lypinator | 0:bb348c97df44 | 36 | #if DEVICE_I2C |
lypinator | 0:bb348c97df44 | 37 | |
lypinator | 0:bb348c97df44 | 38 | #include "cmsis.h" |
lypinator | 0:bb348c97df44 | 39 | #include "pinmap.h" |
lypinator | 0:bb348c97df44 | 40 | #include "PeripheralPins.h" |
lypinator | 0:bb348c97df44 | 41 | #include "i2c_device.h" // family specific defines |
lypinator | 0:bb348c97df44 | 42 | |
lypinator | 0:bb348c97df44 | 43 | #ifndef DEBUG_STDIO |
lypinator | 0:bb348c97df44 | 44 | # define DEBUG_STDIO 0 |
lypinator | 0:bb348c97df44 | 45 | #endif |
lypinator | 0:bb348c97df44 | 46 | |
lypinator | 0:bb348c97df44 | 47 | #if DEBUG_STDIO |
lypinator | 0:bb348c97df44 | 48 | # include <stdio.h> |
lypinator | 0:bb348c97df44 | 49 | # define DEBUG_PRINTF(...) do { printf(__VA_ARGS__); } while(0) |
lypinator | 0:bb348c97df44 | 50 | #else |
lypinator | 0:bb348c97df44 | 51 | # define DEBUG_PRINTF(...) {} |
lypinator | 0:bb348c97df44 | 52 | #endif |
lypinator | 0:bb348c97df44 | 53 | |
lypinator | 0:bb348c97df44 | 54 | #if DEVICE_I2C_ASYNCH |
lypinator | 0:bb348c97df44 | 55 | #define I2C_S(obj) (struct i2c_s *) (&((obj)->i2c)) |
lypinator | 0:bb348c97df44 | 56 | #else |
lypinator | 0:bb348c97df44 | 57 | #define I2C_S(obj) (struct i2c_s *) (obj) |
lypinator | 0:bb348c97df44 | 58 | #endif |
lypinator | 0:bb348c97df44 | 59 | |
lypinator | 0:bb348c97df44 | 60 | /* Family specific description for I2C */ |
lypinator | 0:bb348c97df44 | 61 | #define I2C_NUM (5) |
lypinator | 0:bb348c97df44 | 62 | static I2C_HandleTypeDef *i2c_handles[I2C_NUM]; |
lypinator | 0:bb348c97df44 | 63 | |
lypinator | 0:bb348c97df44 | 64 | /* Timeout values are based on core clock and I2C clock. |
lypinator | 0:bb348c97df44 | 65 | The BYTE_TIMEOUT is computed as twice the number of cycles it would |
lypinator | 0:bb348c97df44 | 66 | take to send 10 bits over I2C. Most Flags should take less than that. |
lypinator | 0:bb348c97df44 | 67 | This is for immediate FLAG or ACK check. |
lypinator | 0:bb348c97df44 | 68 | */ |
lypinator | 0:bb348c97df44 | 69 | #define BYTE_TIMEOUT ((SystemCoreClock / obj_s->hz) * 2 * 10) |
lypinator | 0:bb348c97df44 | 70 | /* Timeout values based on I2C clock. |
lypinator | 0:bb348c97df44 | 71 | The BYTE_TIMEOUT_US is computed as 3x the time in us it would |
lypinator | 0:bb348c97df44 | 72 | take to send 10 bits over I2C. Most Flags should take less than that. |
lypinator | 0:bb348c97df44 | 73 | This is for complete transfers check. |
lypinator | 0:bb348c97df44 | 74 | */ |
lypinator | 0:bb348c97df44 | 75 | #define BYTE_TIMEOUT_US ((SystemCoreClock / obj_s->hz) * 3 * 10) |
lypinator | 0:bb348c97df44 | 76 | /* Timeout values for flags and events waiting loops. These timeouts are |
lypinator | 0:bb348c97df44 | 77 | not based on accurate values, they just guarantee that the application will |
lypinator | 0:bb348c97df44 | 78 | not remain stuck if the I2C communication is corrupted. |
lypinator | 0:bb348c97df44 | 79 | */ |
lypinator | 0:bb348c97df44 | 80 | #define FLAG_TIMEOUT ((int)0x1000) |
lypinator | 0:bb348c97df44 | 81 | |
lypinator | 0:bb348c97df44 | 82 | /* GENERIC INIT and HELPERS FUNCTIONS */ |
lypinator | 0:bb348c97df44 | 83 | |
lypinator | 0:bb348c97df44 | 84 | #if defined(I2C1_BASE) |
lypinator | 0:bb348c97df44 | 85 | static void i2c1_irq(void) |
lypinator | 0:bb348c97df44 | 86 | { |
lypinator | 0:bb348c97df44 | 87 | I2C_HandleTypeDef *handle = i2c_handles[0]; |
lypinator | 0:bb348c97df44 | 88 | HAL_I2C_EV_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 89 | HAL_I2C_ER_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 90 | } |
lypinator | 0:bb348c97df44 | 91 | #endif |
lypinator | 0:bb348c97df44 | 92 | #if defined(I2C2_BASE) |
lypinator | 0:bb348c97df44 | 93 | static void i2c2_irq(void) |
lypinator | 0:bb348c97df44 | 94 | { |
lypinator | 0:bb348c97df44 | 95 | I2C_HandleTypeDef *handle = i2c_handles[1]; |
lypinator | 0:bb348c97df44 | 96 | HAL_I2C_EV_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 97 | HAL_I2C_ER_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 98 | } |
lypinator | 0:bb348c97df44 | 99 | #endif |
lypinator | 0:bb348c97df44 | 100 | #if defined(I2C3_BASE) |
lypinator | 0:bb348c97df44 | 101 | static void i2c3_irq(void) |
lypinator | 0:bb348c97df44 | 102 | { |
lypinator | 0:bb348c97df44 | 103 | I2C_HandleTypeDef *handle = i2c_handles[2]; |
lypinator | 0:bb348c97df44 | 104 | HAL_I2C_EV_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 105 | HAL_I2C_ER_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 106 | } |
lypinator | 0:bb348c97df44 | 107 | #endif |
lypinator | 0:bb348c97df44 | 108 | #if defined(I2C4_BASE) |
lypinator | 0:bb348c97df44 | 109 | static void i2c4_irq(void) |
lypinator | 0:bb348c97df44 | 110 | { |
lypinator | 0:bb348c97df44 | 111 | I2C_HandleTypeDef *handle = i2c_handles[3]; |
lypinator | 0:bb348c97df44 | 112 | HAL_I2C_EV_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 113 | HAL_I2C_ER_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 114 | } |
lypinator | 0:bb348c97df44 | 115 | #endif |
lypinator | 0:bb348c97df44 | 116 | #if defined(FMPI2C1_BASE) |
lypinator | 0:bb348c97df44 | 117 | static void i2c5_irq(void) |
lypinator | 0:bb348c97df44 | 118 | { |
lypinator | 0:bb348c97df44 | 119 | I2C_HandleTypeDef *handle = i2c_handles[4]; |
lypinator | 0:bb348c97df44 | 120 | HAL_I2C_EV_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 121 | HAL_I2C_ER_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 122 | } |
lypinator | 0:bb348c97df44 | 123 | #endif |
lypinator | 0:bb348c97df44 | 124 | |
lypinator | 0:bb348c97df44 | 125 | void i2c_ev_err_enable(i2c_t *obj, uint32_t handler) |
lypinator | 0:bb348c97df44 | 126 | { |
lypinator | 0:bb348c97df44 | 127 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 128 | IRQn_Type irq_event_n = obj_s->event_i2cIRQ; |
lypinator | 0:bb348c97df44 | 129 | IRQn_Type irq_error_n = obj_s->error_i2cIRQ; |
lypinator | 0:bb348c97df44 | 130 | /* default prio in master case is set to 2 */ |
lypinator | 0:bb348c97df44 | 131 | uint32_t prio = 2; |
lypinator | 0:bb348c97df44 | 132 | |
lypinator | 0:bb348c97df44 | 133 | /* Set up ITs using IRQ and handler tables */ |
lypinator | 0:bb348c97df44 | 134 | NVIC_SetVector(irq_event_n, handler); |
lypinator | 0:bb348c97df44 | 135 | NVIC_SetVector(irq_error_n, handler); |
lypinator | 0:bb348c97df44 | 136 | |
lypinator | 0:bb348c97df44 | 137 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 138 | /* Set higher priority to slave device than master. |
lypinator | 0:bb348c97df44 | 139 | * In case a device makes use of both master and slave, the |
lypinator | 0:bb348c97df44 | 140 | * slave needs higher responsiveness. |
lypinator | 0:bb348c97df44 | 141 | */ |
lypinator | 0:bb348c97df44 | 142 | if (obj_s->slave) { |
lypinator | 0:bb348c97df44 | 143 | prio = 1; |
lypinator | 0:bb348c97df44 | 144 | } |
lypinator | 0:bb348c97df44 | 145 | #endif |
lypinator | 0:bb348c97df44 | 146 | |
lypinator | 0:bb348c97df44 | 147 | NVIC_SetPriority(irq_event_n, prio); |
lypinator | 0:bb348c97df44 | 148 | NVIC_SetPriority(irq_error_n, prio); |
lypinator | 0:bb348c97df44 | 149 | NVIC_EnableIRQ(irq_event_n); |
lypinator | 0:bb348c97df44 | 150 | NVIC_EnableIRQ(irq_error_n); |
lypinator | 0:bb348c97df44 | 151 | } |
lypinator | 0:bb348c97df44 | 152 | |
lypinator | 0:bb348c97df44 | 153 | void i2c_ev_err_disable(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 154 | { |
lypinator | 0:bb348c97df44 | 155 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 156 | IRQn_Type irq_event_n = obj_s->event_i2cIRQ; |
lypinator | 0:bb348c97df44 | 157 | IRQn_Type irq_error_n = obj_s->error_i2cIRQ; |
lypinator | 0:bb348c97df44 | 158 | |
lypinator | 0:bb348c97df44 | 159 | HAL_NVIC_DisableIRQ(irq_event_n); |
lypinator | 0:bb348c97df44 | 160 | HAL_NVIC_DisableIRQ(irq_error_n); |
lypinator | 0:bb348c97df44 | 161 | } |
lypinator | 0:bb348c97df44 | 162 | |
lypinator | 0:bb348c97df44 | 163 | uint32_t i2c_get_irq_handler(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 164 | { |
lypinator | 0:bb348c97df44 | 165 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 166 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 167 | uint32_t handler = 0; |
lypinator | 0:bb348c97df44 | 168 | |
lypinator | 0:bb348c97df44 | 169 | switch (obj_s->index) { |
lypinator | 0:bb348c97df44 | 170 | #if defined(I2C1_BASE) |
lypinator | 0:bb348c97df44 | 171 | case 0: |
lypinator | 0:bb348c97df44 | 172 | handler = (uint32_t)&i2c1_irq; |
lypinator | 0:bb348c97df44 | 173 | break; |
lypinator | 0:bb348c97df44 | 174 | #endif |
lypinator | 0:bb348c97df44 | 175 | #if defined(I2C2_BASE) |
lypinator | 0:bb348c97df44 | 176 | case 1: |
lypinator | 0:bb348c97df44 | 177 | handler = (uint32_t)&i2c2_irq; |
lypinator | 0:bb348c97df44 | 178 | break; |
lypinator | 0:bb348c97df44 | 179 | #endif |
lypinator | 0:bb348c97df44 | 180 | #if defined(I2C3_BASE) |
lypinator | 0:bb348c97df44 | 181 | case 2: |
lypinator | 0:bb348c97df44 | 182 | handler = (uint32_t)&i2c3_irq; |
lypinator | 0:bb348c97df44 | 183 | break; |
lypinator | 0:bb348c97df44 | 184 | #endif |
lypinator | 0:bb348c97df44 | 185 | #if defined(I2C4_BASE) |
lypinator | 0:bb348c97df44 | 186 | case 3: |
lypinator | 0:bb348c97df44 | 187 | handler = (uint32_t)&i2c4_irq; |
lypinator | 0:bb348c97df44 | 188 | break; |
lypinator | 0:bb348c97df44 | 189 | #endif |
lypinator | 0:bb348c97df44 | 190 | #if defined(FMPI2C1_BASE) |
lypinator | 0:bb348c97df44 | 191 | case 4: |
lypinator | 0:bb348c97df44 | 192 | handler = (uint32_t)&i2c5_irq; |
lypinator | 0:bb348c97df44 | 193 | break; |
lypinator | 0:bb348c97df44 | 194 | #endif |
lypinator | 0:bb348c97df44 | 195 | } |
lypinator | 0:bb348c97df44 | 196 | |
lypinator | 0:bb348c97df44 | 197 | i2c_handles[obj_s->index] = handle; |
lypinator | 0:bb348c97df44 | 198 | return handler; |
lypinator | 0:bb348c97df44 | 199 | } |
lypinator | 0:bb348c97df44 | 200 | |
lypinator | 0:bb348c97df44 | 201 | void i2c_hw_reset(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 202 | { |
lypinator | 0:bb348c97df44 | 203 | int timeout; |
lypinator | 0:bb348c97df44 | 204 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 205 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 206 | |
lypinator | 0:bb348c97df44 | 207 | handle->Instance = (I2C_TypeDef *)(obj_s->i2c); |
lypinator | 0:bb348c97df44 | 208 | |
lypinator | 0:bb348c97df44 | 209 | // wait before reset |
lypinator | 0:bb348c97df44 | 210 | timeout = BYTE_TIMEOUT; |
lypinator | 0:bb348c97df44 | 211 | while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BUSY)) && (--timeout != 0)); |
lypinator | 0:bb348c97df44 | 212 | #if defined I2C1_BASE |
lypinator | 0:bb348c97df44 | 213 | if (obj_s->i2c == I2C_1) { |
lypinator | 0:bb348c97df44 | 214 | __HAL_RCC_I2C1_FORCE_RESET(); |
lypinator | 0:bb348c97df44 | 215 | __HAL_RCC_I2C1_RELEASE_RESET(); |
lypinator | 0:bb348c97df44 | 216 | } |
lypinator | 0:bb348c97df44 | 217 | #endif |
lypinator | 0:bb348c97df44 | 218 | #if defined I2C2_BASE |
lypinator | 0:bb348c97df44 | 219 | if (obj_s->i2c == I2C_2) { |
lypinator | 0:bb348c97df44 | 220 | __HAL_RCC_I2C2_FORCE_RESET(); |
lypinator | 0:bb348c97df44 | 221 | __HAL_RCC_I2C2_RELEASE_RESET(); |
lypinator | 0:bb348c97df44 | 222 | } |
lypinator | 0:bb348c97df44 | 223 | #endif |
lypinator | 0:bb348c97df44 | 224 | #if defined I2C3_BASE |
lypinator | 0:bb348c97df44 | 225 | if (obj_s->i2c == I2C_3) { |
lypinator | 0:bb348c97df44 | 226 | __HAL_RCC_I2C3_FORCE_RESET(); |
lypinator | 0:bb348c97df44 | 227 | __HAL_RCC_I2C3_RELEASE_RESET(); |
lypinator | 0:bb348c97df44 | 228 | } |
lypinator | 0:bb348c97df44 | 229 | #endif |
lypinator | 0:bb348c97df44 | 230 | #if defined I2C4_BASE |
lypinator | 0:bb348c97df44 | 231 | if (obj_s->i2c == I2C_4) { |
lypinator | 0:bb348c97df44 | 232 | __HAL_RCC_I2C4_FORCE_RESET(); |
lypinator | 0:bb348c97df44 | 233 | __HAL_RCC_I2C4_RELEASE_RESET(); |
lypinator | 0:bb348c97df44 | 234 | } |
lypinator | 0:bb348c97df44 | 235 | #endif |
lypinator | 0:bb348c97df44 | 236 | #if defined FMPI2C1_BASE |
lypinator | 0:bb348c97df44 | 237 | if (obj_s->i2c == FMPI2C_1) { |
lypinator | 0:bb348c97df44 | 238 | __HAL_RCC_FMPI2C1_FORCE_RESET(); |
lypinator | 0:bb348c97df44 | 239 | __HAL_RCC_FMPI2C1_RELEASE_RESET(); |
lypinator | 0:bb348c97df44 | 240 | } |
lypinator | 0:bb348c97df44 | 241 | #endif |
lypinator | 0:bb348c97df44 | 242 | } |
lypinator | 0:bb348c97df44 | 243 | |
lypinator | 0:bb348c97df44 | 244 | void i2c_sw_reset(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 245 | { |
lypinator | 0:bb348c97df44 | 246 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 247 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 248 | /* SW reset procedure: |
lypinator | 0:bb348c97df44 | 249 | * PE must be kept low during at least 3 APB clock cycles |
lypinator | 0:bb348c97df44 | 250 | * in order to perform the software reset. |
lypinator | 0:bb348c97df44 | 251 | * This is ensured by writing the following software sequence: |
lypinator | 0:bb348c97df44 | 252 | * - Write PE=0 |
lypinator | 0:bb348c97df44 | 253 | * - Check PE=0 |
lypinator | 0:bb348c97df44 | 254 | * - Write PE=1. |
lypinator | 0:bb348c97df44 | 255 | */ |
lypinator | 0:bb348c97df44 | 256 | handle->Instance->CR1 &= ~I2C_CR1_PE; |
lypinator | 0:bb348c97df44 | 257 | while (handle->Instance->CR1 & I2C_CR1_PE); |
lypinator | 0:bb348c97df44 | 258 | handle->Instance->CR1 |= I2C_CR1_PE; |
lypinator | 0:bb348c97df44 | 259 | } |
lypinator | 0:bb348c97df44 | 260 | |
lypinator | 0:bb348c97df44 | 261 | void i2c_init(i2c_t *obj, PinName sda, PinName scl) |
lypinator | 0:bb348c97df44 | 262 | { |
lypinator | 0:bb348c97df44 | 263 | |
lypinator | 0:bb348c97df44 | 264 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 265 | |
lypinator | 0:bb348c97df44 | 266 | // Determine the I2C to use |
lypinator | 0:bb348c97df44 | 267 | I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA); |
lypinator | 0:bb348c97df44 | 268 | I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL); |
lypinator | 0:bb348c97df44 | 269 | obj_s->sda = sda; |
lypinator | 0:bb348c97df44 | 270 | obj_s->scl = scl; |
lypinator | 0:bb348c97df44 | 271 | |
lypinator | 0:bb348c97df44 | 272 | obj_s->i2c = (I2CName)pinmap_merge(i2c_sda, i2c_scl); |
lypinator | 0:bb348c97df44 | 273 | MBED_ASSERT(obj_s->i2c != (I2CName)NC); |
lypinator | 0:bb348c97df44 | 274 | |
lypinator | 0:bb348c97df44 | 275 | #if defined I2C1_BASE |
lypinator | 0:bb348c97df44 | 276 | // Enable I2C1 clock and pinout if not done |
lypinator | 0:bb348c97df44 | 277 | if (obj_s->i2c == I2C_1) { |
lypinator | 0:bb348c97df44 | 278 | obj_s->index = 0; |
lypinator | 0:bb348c97df44 | 279 | __HAL_RCC_I2C1_CLK_ENABLE(); |
lypinator | 0:bb348c97df44 | 280 | // Configure I2C pins |
lypinator | 0:bb348c97df44 | 281 | obj_s->event_i2cIRQ = I2C1_EV_IRQn; |
lypinator | 0:bb348c97df44 | 282 | obj_s->error_i2cIRQ = I2C1_ER_IRQn; |
lypinator | 0:bb348c97df44 | 283 | } |
lypinator | 0:bb348c97df44 | 284 | #endif |
lypinator | 0:bb348c97df44 | 285 | #if defined I2C2_BASE |
lypinator | 0:bb348c97df44 | 286 | // Enable I2C2 clock and pinout if not done |
lypinator | 0:bb348c97df44 | 287 | if (obj_s->i2c == I2C_2) { |
lypinator | 0:bb348c97df44 | 288 | obj_s->index = 1; |
lypinator | 0:bb348c97df44 | 289 | __HAL_RCC_I2C2_CLK_ENABLE(); |
lypinator | 0:bb348c97df44 | 290 | obj_s->event_i2cIRQ = I2C2_EV_IRQn; |
lypinator | 0:bb348c97df44 | 291 | obj_s->error_i2cIRQ = I2C2_ER_IRQn; |
lypinator | 0:bb348c97df44 | 292 | } |
lypinator | 0:bb348c97df44 | 293 | #endif |
lypinator | 0:bb348c97df44 | 294 | #if defined I2C3_BASE |
lypinator | 0:bb348c97df44 | 295 | // Enable I2C3 clock and pinout if not done |
lypinator | 0:bb348c97df44 | 296 | if (obj_s->i2c == I2C_3) { |
lypinator | 0:bb348c97df44 | 297 | obj_s->index = 2; |
lypinator | 0:bb348c97df44 | 298 | __HAL_RCC_I2C3_CLK_ENABLE(); |
lypinator | 0:bb348c97df44 | 299 | obj_s->event_i2cIRQ = I2C3_EV_IRQn; |
lypinator | 0:bb348c97df44 | 300 | obj_s->error_i2cIRQ = I2C3_ER_IRQn; |
lypinator | 0:bb348c97df44 | 301 | } |
lypinator | 0:bb348c97df44 | 302 | #endif |
lypinator | 0:bb348c97df44 | 303 | #if defined I2C4_BASE |
lypinator | 0:bb348c97df44 | 304 | // Enable I2C3 clock and pinout if not done |
lypinator | 0:bb348c97df44 | 305 | if (obj_s->i2c == I2C_4) { |
lypinator | 0:bb348c97df44 | 306 | obj_s->index = 3; |
lypinator | 0:bb348c97df44 | 307 | __HAL_RCC_I2C4_CLK_ENABLE(); |
lypinator | 0:bb348c97df44 | 308 | obj_s->event_i2cIRQ = I2C4_EV_IRQn; |
lypinator | 0:bb348c97df44 | 309 | obj_s->error_i2cIRQ = I2C4_ER_IRQn; |
lypinator | 0:bb348c97df44 | 310 | } |
lypinator | 0:bb348c97df44 | 311 | #endif |
lypinator | 0:bb348c97df44 | 312 | #if defined FMPI2C1_BASE |
lypinator | 0:bb348c97df44 | 313 | // Enable I2C3 clock and pinout if not done |
lypinator | 0:bb348c97df44 | 314 | if (obj_s->i2c == FMPI2C_1) { |
lypinator | 0:bb348c97df44 | 315 | obj_s->index = 4; |
lypinator | 0:bb348c97df44 | 316 | __HAL_RCC_FMPI2C1_CLK_ENABLE(); |
lypinator | 0:bb348c97df44 | 317 | obj_s->event_i2cIRQ = FMPI2C1_EV_IRQn; |
lypinator | 0:bb348c97df44 | 318 | obj_s->error_i2cIRQ = FMPI2C1_ER_IRQn; |
lypinator | 0:bb348c97df44 | 319 | } |
lypinator | 0:bb348c97df44 | 320 | #endif |
lypinator | 0:bb348c97df44 | 321 | |
lypinator | 0:bb348c97df44 | 322 | // Configure I2C pins |
lypinator | 0:bb348c97df44 | 323 | pinmap_pinout(sda, PinMap_I2C_SDA); |
lypinator | 0:bb348c97df44 | 324 | pinmap_pinout(scl, PinMap_I2C_SCL); |
lypinator | 0:bb348c97df44 | 325 | pin_mode(sda, OpenDrainNoPull); |
lypinator | 0:bb348c97df44 | 326 | pin_mode(scl, OpenDrainNoPull); |
lypinator | 0:bb348c97df44 | 327 | |
lypinator | 0:bb348c97df44 | 328 | // I2C configuration |
lypinator | 0:bb348c97df44 | 329 | // Default hz value used for timeout computation |
lypinator | 0:bb348c97df44 | 330 | if (!obj_s->hz) { |
lypinator | 0:bb348c97df44 | 331 | obj_s->hz = 100000; // 100 kHz per default |
lypinator | 0:bb348c97df44 | 332 | } |
lypinator | 0:bb348c97df44 | 333 | |
lypinator | 0:bb348c97df44 | 334 | // Reset to clear pending flags if any |
lypinator | 0:bb348c97df44 | 335 | i2c_hw_reset(obj); |
lypinator | 0:bb348c97df44 | 336 | i2c_frequency(obj, obj_s->hz); |
lypinator | 0:bb348c97df44 | 337 | |
lypinator | 0:bb348c97df44 | 338 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 339 | // I2C master by default |
lypinator | 0:bb348c97df44 | 340 | obj_s->slave = 0; |
lypinator | 0:bb348c97df44 | 341 | obj_s->pending_slave_tx_master_rx = 0; |
lypinator | 0:bb348c97df44 | 342 | obj_s->pending_slave_rx_maxter_tx = 0; |
lypinator | 0:bb348c97df44 | 343 | #endif |
lypinator | 0:bb348c97df44 | 344 | |
lypinator | 0:bb348c97df44 | 345 | // I2C Xfer operation init |
lypinator | 0:bb348c97df44 | 346 | obj_s->event = 0; |
lypinator | 0:bb348c97df44 | 347 | obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 348 | #ifdef I2C_IP_VERSION_V2 |
lypinator | 0:bb348c97df44 | 349 | obj_s->pending_start = 0; |
lypinator | 0:bb348c97df44 | 350 | #endif |
lypinator | 0:bb348c97df44 | 351 | } |
lypinator | 0:bb348c97df44 | 352 | |
lypinator | 0:bb348c97df44 | 353 | void i2c_frequency(i2c_t *obj, int hz) |
lypinator | 0:bb348c97df44 | 354 | { |
lypinator | 0:bb348c97df44 | 355 | int timeout; |
lypinator | 0:bb348c97df44 | 356 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 357 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 358 | |
lypinator | 0:bb348c97df44 | 359 | // wait before init |
lypinator | 0:bb348c97df44 | 360 | timeout = BYTE_TIMEOUT; |
lypinator | 0:bb348c97df44 | 361 | while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BUSY)) && (--timeout != 0)); |
lypinator | 0:bb348c97df44 | 362 | |
lypinator | 0:bb348c97df44 | 363 | #ifdef I2C_IP_VERSION_V1 |
lypinator | 0:bb348c97df44 | 364 | handle->Init.ClockSpeed = hz; |
lypinator | 0:bb348c97df44 | 365 | handle->Init.DutyCycle = I2C_DUTYCYCLE_2; |
lypinator | 0:bb348c97df44 | 366 | #endif |
lypinator | 0:bb348c97df44 | 367 | #ifdef I2C_IP_VERSION_V2 |
lypinator | 0:bb348c97df44 | 368 | /* Only predefined timing for below frequencies are supported */ |
lypinator | 0:bb348c97df44 | 369 | MBED_ASSERT((hz == 100000) || (hz == 400000) || (hz == 1000000)); |
lypinator | 0:bb348c97df44 | 370 | handle->Init.Timing = get_i2c_timing(hz); |
lypinator | 0:bb348c97df44 | 371 | |
lypinator | 0:bb348c97df44 | 372 | // Enable the Fast Mode Plus capability |
lypinator | 0:bb348c97df44 | 373 | if (hz == 1000000) { |
lypinator | 0:bb348c97df44 | 374 | #if defined(I2C1_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C1) |
lypinator | 0:bb348c97df44 | 375 | if (obj_s->i2c == I2C_1) { |
lypinator | 0:bb348c97df44 | 376 | HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C1); |
lypinator | 0:bb348c97df44 | 377 | } |
lypinator | 0:bb348c97df44 | 378 | #endif |
lypinator | 0:bb348c97df44 | 379 | #if defined(I2C2_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C2) |
lypinator | 0:bb348c97df44 | 380 | if (obj_s->i2c == I2C_2) { |
lypinator | 0:bb348c97df44 | 381 | HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C2); |
lypinator | 0:bb348c97df44 | 382 | } |
lypinator | 0:bb348c97df44 | 383 | #endif |
lypinator | 0:bb348c97df44 | 384 | #if defined(I2C3_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C3) |
lypinator | 0:bb348c97df44 | 385 | if (obj_s->i2c == I2C_3) { |
lypinator | 0:bb348c97df44 | 386 | HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C3); |
lypinator | 0:bb348c97df44 | 387 | } |
lypinator | 0:bb348c97df44 | 388 | #endif |
lypinator | 0:bb348c97df44 | 389 | #if defined(I2C4_BASE) && defined(__HAL_SYSCFG_FASTMODEPLUS_ENABLE) && defined (I2C_FASTMODEPLUS_I2C4) |
lypinator | 0:bb348c97df44 | 390 | if (obj_s->i2c == I2C_4) { |
lypinator | 0:bb348c97df44 | 391 | HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C4); |
lypinator | 0:bb348c97df44 | 392 | } |
lypinator | 0:bb348c97df44 | 393 | #endif |
lypinator | 0:bb348c97df44 | 394 | } |
lypinator | 0:bb348c97df44 | 395 | #endif //I2C_IP_VERSION_V2 |
lypinator | 0:bb348c97df44 | 396 | |
lypinator | 0:bb348c97df44 | 397 | /*##-1- Configure the I2C clock source. The clock is derived from the SYSCLK #*/ |
lypinator | 0:bb348c97df44 | 398 | #if defined(I2C1_BASE) && defined (__HAL_RCC_I2C1_CONFIG) |
lypinator | 0:bb348c97df44 | 399 | if (obj_s->i2c == I2C_1) { |
lypinator | 0:bb348c97df44 | 400 | __HAL_RCC_I2C1_CONFIG(I2CAPI_I2C1_CLKSRC); |
lypinator | 0:bb348c97df44 | 401 | } |
lypinator | 0:bb348c97df44 | 402 | #endif |
lypinator | 0:bb348c97df44 | 403 | #if defined(I2C2_BASE) && defined(__HAL_RCC_I2C2_CONFIG) |
lypinator | 0:bb348c97df44 | 404 | if (obj_s->i2c == I2C_2) { |
lypinator | 0:bb348c97df44 | 405 | __HAL_RCC_I2C2_CONFIG(I2CAPI_I2C2_CLKSRC); |
lypinator | 0:bb348c97df44 | 406 | } |
lypinator | 0:bb348c97df44 | 407 | #endif |
lypinator | 0:bb348c97df44 | 408 | #if defined(I2C3_BASE) && defined(__HAL_RCC_I2C3_CONFIG) |
lypinator | 0:bb348c97df44 | 409 | if (obj_s->i2c == I2C_3) { |
lypinator | 0:bb348c97df44 | 410 | __HAL_RCC_I2C3_CONFIG(I2CAPI_I2C3_CLKSRC); |
lypinator | 0:bb348c97df44 | 411 | } |
lypinator | 0:bb348c97df44 | 412 | #endif |
lypinator | 0:bb348c97df44 | 413 | #if defined(I2C4_BASE) && defined(__HAL_RCC_I2C4_CONFIG) |
lypinator | 0:bb348c97df44 | 414 | if (obj_s->i2c == I2C_4) { |
lypinator | 0:bb348c97df44 | 415 | __HAL_RCC_I2C4_CONFIG(I2CAPI_I2C4_CLKSRC); |
lypinator | 0:bb348c97df44 | 416 | } |
lypinator | 0:bb348c97df44 | 417 | #endif |
lypinator | 0:bb348c97df44 | 418 | |
lypinator | 0:bb348c97df44 | 419 | #ifdef I2C_ANALOGFILTER_ENABLE |
lypinator | 0:bb348c97df44 | 420 | /* Enable the Analog I2C Filter */ |
lypinator | 0:bb348c97df44 | 421 | HAL_I2CEx_ConfigAnalogFilter(handle, I2C_ANALOGFILTER_ENABLE); |
lypinator | 0:bb348c97df44 | 422 | #endif |
lypinator | 0:bb348c97df44 | 423 | |
lypinator | 0:bb348c97df44 | 424 | // I2C configuration |
lypinator | 0:bb348c97df44 | 425 | handle->Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; |
lypinator | 0:bb348c97df44 | 426 | handle->Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; |
lypinator | 0:bb348c97df44 | 427 | handle->Init.GeneralCallMode = I2C_GENERALCALL_DISABLE; |
lypinator | 0:bb348c97df44 | 428 | handle->Init.NoStretchMode = I2C_NOSTRETCH_DISABLE; |
lypinator | 0:bb348c97df44 | 429 | handle->Init.OwnAddress1 = 0; |
lypinator | 0:bb348c97df44 | 430 | handle->Init.OwnAddress2 = 0; |
lypinator | 0:bb348c97df44 | 431 | HAL_I2C_Init(handle); |
lypinator | 0:bb348c97df44 | 432 | |
lypinator | 0:bb348c97df44 | 433 | /* store frequency for timeout computation */ |
lypinator | 0:bb348c97df44 | 434 | obj_s->hz = hz; |
lypinator | 0:bb348c97df44 | 435 | } |
lypinator | 0:bb348c97df44 | 436 | |
lypinator | 0:bb348c97df44 | 437 | i2c_t *get_i2c_obj(I2C_HandleTypeDef *hi2c) |
lypinator | 0:bb348c97df44 | 438 | { |
lypinator | 0:bb348c97df44 | 439 | /* Aim of the function is to get i2c_s pointer using hi2c pointer */ |
lypinator | 0:bb348c97df44 | 440 | /* Highly inspired from magical linux kernel's "container_of" */ |
lypinator | 0:bb348c97df44 | 441 | /* (which was not directly used since not compatible with IAR toolchain) */ |
lypinator | 0:bb348c97df44 | 442 | struct i2c_s *obj_s; |
lypinator | 0:bb348c97df44 | 443 | i2c_t *obj; |
lypinator | 0:bb348c97df44 | 444 | |
lypinator | 0:bb348c97df44 | 445 | obj_s = (struct i2c_s *)((char *)hi2c - offsetof(struct i2c_s, handle)); |
lypinator | 0:bb348c97df44 | 446 | obj = (i2c_t *)((char *)obj_s - offsetof(i2c_t, i2c)); |
lypinator | 0:bb348c97df44 | 447 | |
lypinator | 0:bb348c97df44 | 448 | return (obj); |
lypinator | 0:bb348c97df44 | 449 | } |
lypinator | 0:bb348c97df44 | 450 | |
lypinator | 0:bb348c97df44 | 451 | void i2c_reset(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 452 | { |
lypinator | 0:bb348c97df44 | 453 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 454 | /* As recommended in i2c_api.h, mainly send stop */ |
lypinator | 0:bb348c97df44 | 455 | i2c_stop(obj); |
lypinator | 0:bb348c97df44 | 456 | /* then re-init */ |
lypinator | 0:bb348c97df44 | 457 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 458 | } |
lypinator | 0:bb348c97df44 | 459 | |
lypinator | 0:bb348c97df44 | 460 | /* |
lypinator | 0:bb348c97df44 | 461 | * UNITARY APIS. |
lypinator | 0:bb348c97df44 | 462 | * For very basic operations, direct registers access is needed |
lypinator | 0:bb348c97df44 | 463 | * There are 2 different IPs version that need to be supported |
lypinator | 0:bb348c97df44 | 464 | */ |
lypinator | 0:bb348c97df44 | 465 | #ifdef I2C_IP_VERSION_V1 |
lypinator | 0:bb348c97df44 | 466 | int i2c_start(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 467 | { |
lypinator | 0:bb348c97df44 | 468 | |
lypinator | 0:bb348c97df44 | 469 | int timeout; |
lypinator | 0:bb348c97df44 | 470 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 471 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 472 | |
lypinator | 0:bb348c97df44 | 473 | // Clear Acknowledge failure flag |
lypinator | 0:bb348c97df44 | 474 | __HAL_I2C_CLEAR_FLAG(handle, I2C_FLAG_AF); |
lypinator | 0:bb348c97df44 | 475 | |
lypinator | 0:bb348c97df44 | 476 | // Wait the STOP condition has been previously correctly sent |
lypinator | 0:bb348c97df44 | 477 | // This timeout can be avoid in some specific cases by simply clearing the STOP bit |
lypinator | 0:bb348c97df44 | 478 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 479 | while ((handle->Instance->CR1 & I2C_CR1_STOP) == I2C_CR1_STOP) { |
lypinator | 0:bb348c97df44 | 480 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 481 | return 1; |
lypinator | 0:bb348c97df44 | 482 | } |
lypinator | 0:bb348c97df44 | 483 | } |
lypinator | 0:bb348c97df44 | 484 | |
lypinator | 0:bb348c97df44 | 485 | // Generate the START condition |
lypinator | 0:bb348c97df44 | 486 | handle->Instance->CR1 |= I2C_CR1_START; |
lypinator | 0:bb348c97df44 | 487 | |
lypinator | 0:bb348c97df44 | 488 | // Wait the START condition has been correctly sent |
lypinator | 0:bb348c97df44 | 489 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 490 | while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_SB) == RESET) { |
lypinator | 0:bb348c97df44 | 491 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 492 | return 1; |
lypinator | 0:bb348c97df44 | 493 | } |
lypinator | 0:bb348c97df44 | 494 | } |
lypinator | 0:bb348c97df44 | 495 | |
lypinator | 0:bb348c97df44 | 496 | return 0; |
lypinator | 0:bb348c97df44 | 497 | } |
lypinator | 0:bb348c97df44 | 498 | |
lypinator | 0:bb348c97df44 | 499 | int i2c_stop(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 500 | { |
lypinator | 0:bb348c97df44 | 501 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 502 | I2C_TypeDef *i2c = (I2C_TypeDef *)obj_s->i2c; |
lypinator | 0:bb348c97df44 | 503 | |
lypinator | 0:bb348c97df44 | 504 | // Generate the STOP condition |
lypinator | 0:bb348c97df44 | 505 | i2c->CR1 |= I2C_CR1_STOP; |
lypinator | 0:bb348c97df44 | 506 | |
lypinator | 0:bb348c97df44 | 507 | /* In case of mixed usage of the APIs (unitary + SYNC) |
lypinator | 0:bb348c97df44 | 508 | * re-init HAL state |
lypinator | 0:bb348c97df44 | 509 | */ |
lypinator | 0:bb348c97df44 | 510 | if (obj_s->XferOperation != I2C_FIRST_AND_LAST_FRAME) { |
lypinator | 0:bb348c97df44 | 511 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 512 | } |
lypinator | 0:bb348c97df44 | 513 | |
lypinator | 0:bb348c97df44 | 514 | return 0; |
lypinator | 0:bb348c97df44 | 515 | } |
lypinator | 0:bb348c97df44 | 516 | |
lypinator | 0:bb348c97df44 | 517 | int i2c_byte_read(i2c_t *obj, int last) |
lypinator | 0:bb348c97df44 | 518 | { |
lypinator | 0:bb348c97df44 | 519 | |
lypinator | 0:bb348c97df44 | 520 | int timeout; |
lypinator | 0:bb348c97df44 | 521 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 522 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 523 | |
lypinator | 0:bb348c97df44 | 524 | if (last) { |
lypinator | 0:bb348c97df44 | 525 | // Don't acknowledge the last byte |
lypinator | 0:bb348c97df44 | 526 | handle->Instance->CR1 &= ~I2C_CR1_ACK; |
lypinator | 0:bb348c97df44 | 527 | } else { |
lypinator | 0:bb348c97df44 | 528 | // Acknowledge the byte |
lypinator | 0:bb348c97df44 | 529 | handle->Instance->CR1 |= I2C_CR1_ACK; |
lypinator | 0:bb348c97df44 | 530 | } |
lypinator | 0:bb348c97df44 | 531 | |
lypinator | 0:bb348c97df44 | 532 | // Wait until the byte is received |
lypinator | 0:bb348c97df44 | 533 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 534 | while (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_RXNE) == RESET) { |
lypinator | 0:bb348c97df44 | 535 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 536 | return -1; |
lypinator | 0:bb348c97df44 | 537 | } |
lypinator | 0:bb348c97df44 | 538 | } |
lypinator | 0:bb348c97df44 | 539 | |
lypinator | 0:bb348c97df44 | 540 | return (int)handle->Instance->DR; |
lypinator | 0:bb348c97df44 | 541 | } |
lypinator | 0:bb348c97df44 | 542 | |
lypinator | 0:bb348c97df44 | 543 | int i2c_byte_write(i2c_t *obj, int data) |
lypinator | 0:bb348c97df44 | 544 | { |
lypinator | 0:bb348c97df44 | 545 | |
lypinator | 0:bb348c97df44 | 546 | int timeout; |
lypinator | 0:bb348c97df44 | 547 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 548 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 549 | |
lypinator | 0:bb348c97df44 | 550 | handle->Instance->DR = (uint8_t)data; |
lypinator | 0:bb348c97df44 | 551 | |
lypinator | 0:bb348c97df44 | 552 | // Wait until the byte (might be the address) is transmitted |
lypinator | 0:bb348c97df44 | 553 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 554 | while ((__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TXE) == RESET) && |
lypinator | 0:bb348c97df44 | 555 | (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_BTF) == RESET) && |
lypinator | 0:bb348c97df44 | 556 | (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_ADDR) == RESET)) { |
lypinator | 0:bb348c97df44 | 557 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 558 | return 2; |
lypinator | 0:bb348c97df44 | 559 | } |
lypinator | 0:bb348c97df44 | 560 | } |
lypinator | 0:bb348c97df44 | 561 | |
lypinator | 0:bb348c97df44 | 562 | if (__HAL_I2C_GET_FLAG(handle, I2C_FLAG_ADDR) != RESET) { |
lypinator | 0:bb348c97df44 | 563 | __HAL_I2C_CLEAR_ADDRFLAG(handle); |
lypinator | 0:bb348c97df44 | 564 | } |
lypinator | 0:bb348c97df44 | 565 | |
lypinator | 0:bb348c97df44 | 566 | return 1; |
lypinator | 0:bb348c97df44 | 567 | } |
lypinator | 0:bb348c97df44 | 568 | #endif //I2C_IP_VERSION_V1 |
lypinator | 0:bb348c97df44 | 569 | #ifdef I2C_IP_VERSION_V2 |
lypinator | 0:bb348c97df44 | 570 | |
lypinator | 0:bb348c97df44 | 571 | int i2c_start(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 572 | { |
lypinator | 0:bb348c97df44 | 573 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 574 | /* This I2C IP doesn't */ |
lypinator | 0:bb348c97df44 | 575 | obj_s->pending_start = 1; |
lypinator | 0:bb348c97df44 | 576 | return 0; |
lypinator | 0:bb348c97df44 | 577 | } |
lypinator | 0:bb348c97df44 | 578 | |
lypinator | 0:bb348c97df44 | 579 | int i2c_stop(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 580 | { |
lypinator | 0:bb348c97df44 | 581 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 582 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 583 | int timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 584 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 585 | if (obj_s->slave) { |
lypinator | 0:bb348c97df44 | 586 | /* re-init slave when stop is requested */ |
lypinator | 0:bb348c97df44 | 587 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 588 | return 0; |
lypinator | 0:bb348c97df44 | 589 | } |
lypinator | 0:bb348c97df44 | 590 | #endif |
lypinator | 0:bb348c97df44 | 591 | // Disable reload mode |
lypinator | 0:bb348c97df44 | 592 | handle->Instance->CR2 &= (uint32_t)~I2C_CR2_RELOAD; |
lypinator | 0:bb348c97df44 | 593 | // Generate the STOP condition |
lypinator | 0:bb348c97df44 | 594 | handle->Instance->CR2 |= I2C_CR2_STOP; |
lypinator | 0:bb348c97df44 | 595 | |
lypinator | 0:bb348c97df44 | 596 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 597 | while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_STOPF)) { |
lypinator | 0:bb348c97df44 | 598 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 599 | return I2C_ERROR_BUS_BUSY; |
lypinator | 0:bb348c97df44 | 600 | } |
lypinator | 0:bb348c97df44 | 601 | } |
lypinator | 0:bb348c97df44 | 602 | |
lypinator | 0:bb348c97df44 | 603 | /* Clear STOP Flag */ |
lypinator | 0:bb348c97df44 | 604 | __HAL_I2C_CLEAR_FLAG(handle, I2C_FLAG_STOPF); |
lypinator | 0:bb348c97df44 | 605 | |
lypinator | 0:bb348c97df44 | 606 | /* Erase slave address, this wiil be used as a marker |
lypinator | 0:bb348c97df44 | 607 | * to know when we need to prepare next start */ |
lypinator | 0:bb348c97df44 | 608 | handle->Instance->CR2 &= ~I2C_CR2_SADD; |
lypinator | 0:bb348c97df44 | 609 | |
lypinator | 0:bb348c97df44 | 610 | /* |
lypinator | 0:bb348c97df44 | 611 | * V2 IP is meant for automatic STOP, not user STOP |
lypinator | 0:bb348c97df44 | 612 | * SW reset the IP state machine before next transaction |
lypinator | 0:bb348c97df44 | 613 | */ |
lypinator | 0:bb348c97df44 | 614 | i2c_sw_reset(obj); |
lypinator | 0:bb348c97df44 | 615 | |
lypinator | 0:bb348c97df44 | 616 | /* In case of mixed usage of the APIs (unitary + SYNC) |
lypinator | 0:bb348c97df44 | 617 | * re-init HAL state */ |
lypinator | 0:bb348c97df44 | 618 | if (obj_s->XferOperation != I2C_FIRST_AND_LAST_FRAME) { |
lypinator | 0:bb348c97df44 | 619 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 620 | } |
lypinator | 0:bb348c97df44 | 621 | |
lypinator | 0:bb348c97df44 | 622 | return 0; |
lypinator | 0:bb348c97df44 | 623 | } |
lypinator | 0:bb348c97df44 | 624 | |
lypinator | 0:bb348c97df44 | 625 | int i2c_byte_read(i2c_t *obj, int last) |
lypinator | 0:bb348c97df44 | 626 | { |
lypinator | 0:bb348c97df44 | 627 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 628 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 629 | int timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 630 | uint32_t tmpreg = handle->Instance->CR2; |
lypinator | 0:bb348c97df44 | 631 | char data; |
lypinator | 0:bb348c97df44 | 632 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 633 | if (obj_s->slave) { |
lypinator | 0:bb348c97df44 | 634 | return i2c_slave_read(obj, &data, 1); |
lypinator | 0:bb348c97df44 | 635 | } |
lypinator | 0:bb348c97df44 | 636 | #endif |
lypinator | 0:bb348c97df44 | 637 | /* Then send data when there's room in the TX fifo */ |
lypinator | 0:bb348c97df44 | 638 | if ((tmpreg & I2C_CR2_RELOAD) != 0) { |
lypinator | 0:bb348c97df44 | 639 | while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TCR)) { |
lypinator | 0:bb348c97df44 | 640 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 641 | DEBUG_PRINTF("timeout in byte_read\r\n"); |
lypinator | 0:bb348c97df44 | 642 | return -1; |
lypinator | 0:bb348c97df44 | 643 | } |
lypinator | 0:bb348c97df44 | 644 | } |
lypinator | 0:bb348c97df44 | 645 | } |
lypinator | 0:bb348c97df44 | 646 | |
lypinator | 0:bb348c97df44 | 647 | /* Enable reload mode as we don't know how many bytes will be sent */ |
lypinator | 0:bb348c97df44 | 648 | /* and set transfer size to 1 */ |
lypinator | 0:bb348c97df44 | 649 | tmpreg |= I2C_CR2_RELOAD | (I2C_CR2_NBYTES & (1 << 16)); |
lypinator | 0:bb348c97df44 | 650 | /* Set the prepared configuration */ |
lypinator | 0:bb348c97df44 | 651 | handle->Instance->CR2 = tmpreg; |
lypinator | 0:bb348c97df44 | 652 | |
lypinator | 0:bb348c97df44 | 653 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 654 | while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_RXNE)) { |
lypinator | 0:bb348c97df44 | 655 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 656 | return -1; |
lypinator | 0:bb348c97df44 | 657 | } |
lypinator | 0:bb348c97df44 | 658 | } |
lypinator | 0:bb348c97df44 | 659 | |
lypinator | 0:bb348c97df44 | 660 | /* Then Get Byte */ |
lypinator | 0:bb348c97df44 | 661 | data = handle->Instance->RXDR; |
lypinator | 0:bb348c97df44 | 662 | |
lypinator | 0:bb348c97df44 | 663 | if (last) { |
lypinator | 0:bb348c97df44 | 664 | /* Disable Address Acknowledge */ |
lypinator | 0:bb348c97df44 | 665 | handle->Instance->CR2 |= I2C_CR2_NACK; |
lypinator | 0:bb348c97df44 | 666 | } |
lypinator | 0:bb348c97df44 | 667 | |
lypinator | 0:bb348c97df44 | 668 | return data; |
lypinator | 0:bb348c97df44 | 669 | } |
lypinator | 0:bb348c97df44 | 670 | |
lypinator | 0:bb348c97df44 | 671 | int i2c_byte_write(i2c_t *obj, int data) |
lypinator | 0:bb348c97df44 | 672 | { |
lypinator | 0:bb348c97df44 | 673 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 674 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 675 | int timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 676 | uint32_t tmpreg = handle->Instance->CR2; |
lypinator | 0:bb348c97df44 | 677 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 678 | if (obj_s->slave) { |
lypinator | 0:bb348c97df44 | 679 | return i2c_slave_write(obj, (char *) &data, 1); |
lypinator | 0:bb348c97df44 | 680 | } |
lypinator | 0:bb348c97df44 | 681 | #endif |
lypinator | 0:bb348c97df44 | 682 | if (obj_s->pending_start) { |
lypinator | 0:bb348c97df44 | 683 | obj_s->pending_start = 0; |
lypinator | 0:bb348c97df44 | 684 | //* First byte after the start is the address */ |
lypinator | 0:bb348c97df44 | 685 | tmpreg |= (uint32_t)((uint32_t)data & I2C_CR2_SADD); |
lypinator | 0:bb348c97df44 | 686 | if (data & 0x01) { |
lypinator | 0:bb348c97df44 | 687 | tmpreg |= I2C_CR2_START | I2C_CR2_RD_WRN; |
lypinator | 0:bb348c97df44 | 688 | } else { |
lypinator | 0:bb348c97df44 | 689 | tmpreg |= I2C_CR2_START; |
lypinator | 0:bb348c97df44 | 690 | tmpreg &= ~I2C_CR2_RD_WRN; |
lypinator | 0:bb348c97df44 | 691 | } |
lypinator | 0:bb348c97df44 | 692 | /* Disable reload first to use it later */ |
lypinator | 0:bb348c97df44 | 693 | tmpreg &= ~I2C_CR2_RELOAD; |
lypinator | 0:bb348c97df44 | 694 | /* Disable Autoend */ |
lypinator | 0:bb348c97df44 | 695 | tmpreg &= ~I2C_CR2_AUTOEND; |
lypinator | 0:bb348c97df44 | 696 | /* Do not set any transfer size for now */ |
lypinator | 0:bb348c97df44 | 697 | tmpreg |= (I2C_CR2_NBYTES & (1 << 16)); |
lypinator | 0:bb348c97df44 | 698 | /* Set the prepared configuration */ |
lypinator | 0:bb348c97df44 | 699 | handle->Instance->CR2 = tmpreg; |
lypinator | 0:bb348c97df44 | 700 | } else { |
lypinator | 0:bb348c97df44 | 701 | /* Set the prepared configuration */ |
lypinator | 0:bb348c97df44 | 702 | tmpreg = handle->Instance->CR2; |
lypinator | 0:bb348c97df44 | 703 | |
lypinator | 0:bb348c97df44 | 704 | /* Then send data when there's room in the TX fifo */ |
lypinator | 0:bb348c97df44 | 705 | if ((tmpreg & I2C_CR2_RELOAD) != 0) { |
lypinator | 0:bb348c97df44 | 706 | while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TCR)) { |
lypinator | 0:bb348c97df44 | 707 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 708 | DEBUG_PRINTF("timeout in byte_write\r\n"); |
lypinator | 0:bb348c97df44 | 709 | return 2; |
lypinator | 0:bb348c97df44 | 710 | } |
lypinator | 0:bb348c97df44 | 711 | } |
lypinator | 0:bb348c97df44 | 712 | } |
lypinator | 0:bb348c97df44 | 713 | /* Enable reload mode as we don't know how many bytes will eb sent */ |
lypinator | 0:bb348c97df44 | 714 | tmpreg |= I2C_CR2_RELOAD; |
lypinator | 0:bb348c97df44 | 715 | /* Set transfer size to 1 */ |
lypinator | 0:bb348c97df44 | 716 | tmpreg |= (I2C_CR2_NBYTES & (1 << 16)); |
lypinator | 0:bb348c97df44 | 717 | /* Set the prepared configuration */ |
lypinator | 0:bb348c97df44 | 718 | handle->Instance->CR2 = tmpreg; |
lypinator | 0:bb348c97df44 | 719 | /* Prepare next write */ |
lypinator | 0:bb348c97df44 | 720 | timeout = FLAG_TIMEOUT; |
lypinator | 0:bb348c97df44 | 721 | while (!__HAL_I2C_GET_FLAG(handle, I2C_FLAG_TXE)) { |
lypinator | 0:bb348c97df44 | 722 | if ((timeout--) == 0) { |
lypinator | 0:bb348c97df44 | 723 | return 2; |
lypinator | 0:bb348c97df44 | 724 | } |
lypinator | 0:bb348c97df44 | 725 | } |
lypinator | 0:bb348c97df44 | 726 | /* Write byte */ |
lypinator | 0:bb348c97df44 | 727 | handle->Instance->TXDR = data; |
lypinator | 0:bb348c97df44 | 728 | } |
lypinator | 0:bb348c97df44 | 729 | |
lypinator | 0:bb348c97df44 | 730 | return 1; |
lypinator | 0:bb348c97df44 | 731 | } |
lypinator | 0:bb348c97df44 | 732 | #endif //I2C_IP_VERSION_V2 |
lypinator | 0:bb348c97df44 | 733 | |
lypinator | 0:bb348c97df44 | 734 | /* |
lypinator | 0:bb348c97df44 | 735 | * SYNC APIS |
lypinator | 0:bb348c97df44 | 736 | */ |
lypinator | 0:bb348c97df44 | 737 | int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) |
lypinator | 0:bb348c97df44 | 738 | { |
lypinator | 0:bb348c97df44 | 739 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 740 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 741 | int count = I2C_ERROR_BUS_BUSY, ret = 0; |
lypinator | 0:bb348c97df44 | 742 | uint32_t timeout = 0; |
lypinator | 0:bb348c97df44 | 743 | |
lypinator | 0:bb348c97df44 | 744 | // Trick to remove compiler warning "left and right operands are identical" in some cases |
lypinator | 0:bb348c97df44 | 745 | uint32_t op1 = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 746 | uint32_t op2 = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 747 | if ((obj_s->XferOperation == op1) || (obj_s->XferOperation == op2)) { |
lypinator | 0:bb348c97df44 | 748 | if (stop) { |
lypinator | 0:bb348c97df44 | 749 | obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 750 | } else { |
lypinator | 0:bb348c97df44 | 751 | obj_s->XferOperation = I2C_FIRST_FRAME; |
lypinator | 0:bb348c97df44 | 752 | } |
lypinator | 0:bb348c97df44 | 753 | } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) || |
lypinator | 0:bb348c97df44 | 754 | (obj_s->XferOperation == I2C_NEXT_FRAME)) { |
lypinator | 0:bb348c97df44 | 755 | if (stop) { |
lypinator | 0:bb348c97df44 | 756 | obj_s->XferOperation = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 757 | } else { |
lypinator | 0:bb348c97df44 | 758 | obj_s->XferOperation = I2C_NEXT_FRAME; |
lypinator | 0:bb348c97df44 | 759 | } |
lypinator | 0:bb348c97df44 | 760 | } |
lypinator | 0:bb348c97df44 | 761 | |
lypinator | 0:bb348c97df44 | 762 | obj_s->event = 0; |
lypinator | 0:bb348c97df44 | 763 | |
lypinator | 0:bb348c97df44 | 764 | /* Activate default IRQ handlers for sync mode |
lypinator | 0:bb348c97df44 | 765 | * which would be overwritten in async mode |
lypinator | 0:bb348c97df44 | 766 | */ |
lypinator | 0:bb348c97df44 | 767 | i2c_ev_err_enable(obj, i2c_get_irq_handler(obj)); |
lypinator | 0:bb348c97df44 | 768 | |
lypinator | 0:bb348c97df44 | 769 | ret = HAL_I2C_Master_Sequential_Receive_IT(handle, address, (uint8_t *) data, length, obj_s->XferOperation); |
lypinator | 0:bb348c97df44 | 770 | |
lypinator | 0:bb348c97df44 | 771 | if (ret == HAL_OK) { |
lypinator | 0:bb348c97df44 | 772 | timeout = BYTE_TIMEOUT_US * (length + 1); |
lypinator | 0:bb348c97df44 | 773 | /* transfer started : wait completion or timeout */ |
lypinator | 0:bb348c97df44 | 774 | while (!(obj_s->event & I2C_EVENT_ALL) && (--timeout != 0)) { |
lypinator | 0:bb348c97df44 | 775 | wait_us(1); |
lypinator | 0:bb348c97df44 | 776 | } |
lypinator | 0:bb348c97df44 | 777 | |
lypinator | 0:bb348c97df44 | 778 | i2c_ev_err_disable(obj); |
lypinator | 0:bb348c97df44 | 779 | |
lypinator | 0:bb348c97df44 | 780 | if ((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) { |
lypinator | 0:bb348c97df44 | 781 | DEBUG_PRINTF(" TIMEOUT or error in i2c_read\r\n"); |
lypinator | 0:bb348c97df44 | 782 | /* re-init IP to try and get back in a working state */ |
lypinator | 0:bb348c97df44 | 783 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 784 | } else { |
lypinator | 0:bb348c97df44 | 785 | count = length; |
lypinator | 0:bb348c97df44 | 786 | } |
lypinator | 0:bb348c97df44 | 787 | } else { |
lypinator | 0:bb348c97df44 | 788 | DEBUG_PRINTF("ERROR in i2c_read:%d\r\n", ret); |
lypinator | 0:bb348c97df44 | 789 | } |
lypinator | 0:bb348c97df44 | 790 | |
lypinator | 0:bb348c97df44 | 791 | return count; |
lypinator | 0:bb348c97df44 | 792 | } |
lypinator | 0:bb348c97df44 | 793 | |
lypinator | 0:bb348c97df44 | 794 | int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) |
lypinator | 0:bb348c97df44 | 795 | { |
lypinator | 0:bb348c97df44 | 796 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 797 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 798 | int count = I2C_ERROR_BUS_BUSY, ret = 0; |
lypinator | 0:bb348c97df44 | 799 | uint32_t timeout = 0; |
lypinator | 0:bb348c97df44 | 800 | |
lypinator | 0:bb348c97df44 | 801 | // Trick to remove compiler warning "left and right operands are identical" in some cases |
lypinator | 0:bb348c97df44 | 802 | uint32_t op1 = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 803 | uint32_t op2 = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 804 | if ((obj_s->XferOperation == op1) || (obj_s->XferOperation == op2)) { |
lypinator | 0:bb348c97df44 | 805 | if (stop) { |
lypinator | 0:bb348c97df44 | 806 | obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 807 | } else { |
lypinator | 0:bb348c97df44 | 808 | obj_s->XferOperation = I2C_FIRST_FRAME; |
lypinator | 0:bb348c97df44 | 809 | } |
lypinator | 0:bb348c97df44 | 810 | } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) || |
lypinator | 0:bb348c97df44 | 811 | (obj_s->XferOperation == I2C_NEXT_FRAME)) { |
lypinator | 0:bb348c97df44 | 812 | if (stop) { |
lypinator | 0:bb348c97df44 | 813 | obj_s->XferOperation = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 814 | } else { |
lypinator | 0:bb348c97df44 | 815 | obj_s->XferOperation = I2C_NEXT_FRAME; |
lypinator | 0:bb348c97df44 | 816 | } |
lypinator | 0:bb348c97df44 | 817 | } |
lypinator | 0:bb348c97df44 | 818 | |
lypinator | 0:bb348c97df44 | 819 | obj_s->event = 0; |
lypinator | 0:bb348c97df44 | 820 | |
lypinator | 0:bb348c97df44 | 821 | i2c_ev_err_enable(obj, i2c_get_irq_handler(obj)); |
lypinator | 0:bb348c97df44 | 822 | |
lypinator | 0:bb348c97df44 | 823 | ret = HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t *) data, length, obj_s->XferOperation); |
lypinator | 0:bb348c97df44 | 824 | |
lypinator | 0:bb348c97df44 | 825 | if (ret == HAL_OK) { |
lypinator | 0:bb348c97df44 | 826 | timeout = BYTE_TIMEOUT_US * (length + 1); |
lypinator | 0:bb348c97df44 | 827 | /* transfer started : wait completion or timeout */ |
lypinator | 0:bb348c97df44 | 828 | while (!(obj_s->event & I2C_EVENT_ALL) && (--timeout != 0)) { |
lypinator | 0:bb348c97df44 | 829 | wait_us(1); |
lypinator | 0:bb348c97df44 | 830 | } |
lypinator | 0:bb348c97df44 | 831 | |
lypinator | 0:bb348c97df44 | 832 | i2c_ev_err_disable(obj); |
lypinator | 0:bb348c97df44 | 833 | |
lypinator | 0:bb348c97df44 | 834 | if ((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) { |
lypinator | 0:bb348c97df44 | 835 | DEBUG_PRINTF(" TIMEOUT or error in i2c_write\r\n"); |
lypinator | 0:bb348c97df44 | 836 | /* re-init IP to try and get back in a working state */ |
lypinator | 0:bb348c97df44 | 837 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 838 | } else { |
lypinator | 0:bb348c97df44 | 839 | count = length; |
lypinator | 0:bb348c97df44 | 840 | } |
lypinator | 0:bb348c97df44 | 841 | } else { |
lypinator | 0:bb348c97df44 | 842 | DEBUG_PRINTF("ERROR in i2c_read\r\n"); |
lypinator | 0:bb348c97df44 | 843 | } |
lypinator | 0:bb348c97df44 | 844 | |
lypinator | 0:bb348c97df44 | 845 | return count; |
lypinator | 0:bb348c97df44 | 846 | } |
lypinator | 0:bb348c97df44 | 847 | |
lypinator | 0:bb348c97df44 | 848 | void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c) |
lypinator | 0:bb348c97df44 | 849 | { |
lypinator | 0:bb348c97df44 | 850 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 851 | i2c_t *obj = get_i2c_obj(hi2c); |
lypinator | 0:bb348c97df44 | 852 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 853 | |
lypinator | 0:bb348c97df44 | 854 | #if DEVICE_I2C_ASYNCH |
lypinator | 0:bb348c97df44 | 855 | /* Handle potential Tx/Rx use case */ |
lypinator | 0:bb348c97df44 | 856 | if ((obj->tx_buff.length) && (obj->rx_buff.length)) { |
lypinator | 0:bb348c97df44 | 857 | if (obj_s->stop) { |
lypinator | 0:bb348c97df44 | 858 | obj_s->XferOperation = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 859 | } else { |
lypinator | 0:bb348c97df44 | 860 | obj_s->XferOperation = I2C_NEXT_FRAME; |
lypinator | 0:bb348c97df44 | 861 | } |
lypinator | 0:bb348c97df44 | 862 | |
lypinator | 0:bb348c97df44 | 863 | HAL_I2C_Master_Sequential_Receive_IT(hi2c, obj_s->address, (uint8_t *)obj->rx_buff.buffer, obj->rx_buff.length, obj_s->XferOperation); |
lypinator | 0:bb348c97df44 | 864 | } else |
lypinator | 0:bb348c97df44 | 865 | #endif |
lypinator | 0:bb348c97df44 | 866 | { |
lypinator | 0:bb348c97df44 | 867 | /* Set event flag */ |
lypinator | 0:bb348c97df44 | 868 | obj_s->event = I2C_EVENT_TRANSFER_COMPLETE; |
lypinator | 0:bb348c97df44 | 869 | } |
lypinator | 0:bb348c97df44 | 870 | } |
lypinator | 0:bb348c97df44 | 871 | |
lypinator | 0:bb348c97df44 | 872 | void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *hi2c) |
lypinator | 0:bb348c97df44 | 873 | { |
lypinator | 0:bb348c97df44 | 874 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 875 | i2c_t *obj = get_i2c_obj(hi2c); |
lypinator | 0:bb348c97df44 | 876 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 877 | |
lypinator | 0:bb348c97df44 | 878 | /* Set event flag */ |
lypinator | 0:bb348c97df44 | 879 | obj_s->event = I2C_EVENT_TRANSFER_COMPLETE; |
lypinator | 0:bb348c97df44 | 880 | } |
lypinator | 0:bb348c97df44 | 881 | |
lypinator | 0:bb348c97df44 | 882 | void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c) |
lypinator | 0:bb348c97df44 | 883 | { |
lypinator | 0:bb348c97df44 | 884 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 885 | i2c_t *obj = get_i2c_obj(hi2c); |
lypinator | 0:bb348c97df44 | 886 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 887 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 888 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 889 | uint32_t address = 0; |
lypinator | 0:bb348c97df44 | 890 | /* Store address to handle it after reset */ |
lypinator | 0:bb348c97df44 | 891 | if (obj_s->slave) { |
lypinator | 0:bb348c97df44 | 892 | address = handle->Init.OwnAddress1; |
lypinator | 0:bb348c97df44 | 893 | } |
lypinator | 0:bb348c97df44 | 894 | #endif |
lypinator | 0:bb348c97df44 | 895 | |
lypinator | 0:bb348c97df44 | 896 | DEBUG_PRINTF("HAL_I2C_ErrorCallback:%d, index=%d\r\n", (int) hi2c->ErrorCode, obj_s->index); |
lypinator | 0:bb348c97df44 | 897 | |
lypinator | 0:bb348c97df44 | 898 | /* re-init IP to try and get back in a working state */ |
lypinator | 0:bb348c97df44 | 899 | i2c_init(obj, obj_s->sda, obj_s->scl); |
lypinator | 0:bb348c97df44 | 900 | |
lypinator | 0:bb348c97df44 | 901 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 902 | /* restore slave address */ |
lypinator | 0:bb348c97df44 | 903 | if (address != 0) { |
lypinator | 0:bb348c97df44 | 904 | obj_s->slave = 1; |
lypinator | 0:bb348c97df44 | 905 | i2c_slave_address(obj, 0, address, 0); |
lypinator | 0:bb348c97df44 | 906 | } |
lypinator | 0:bb348c97df44 | 907 | #endif |
lypinator | 0:bb348c97df44 | 908 | |
lypinator | 0:bb348c97df44 | 909 | /* Keep Set event flag */ |
lypinator | 0:bb348c97df44 | 910 | obj_s->event = I2C_EVENT_ERROR; |
lypinator | 0:bb348c97df44 | 911 | } |
lypinator | 0:bb348c97df44 | 912 | |
lypinator | 0:bb348c97df44 | 913 | #if DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 914 | /* SLAVE API FUNCTIONS */ |
lypinator | 0:bb348c97df44 | 915 | void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) |
lypinator | 0:bb348c97df44 | 916 | { |
lypinator | 0:bb348c97df44 | 917 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 918 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 919 | |
lypinator | 0:bb348c97df44 | 920 | // I2C configuration |
lypinator | 0:bb348c97df44 | 921 | handle->Init.OwnAddress1 = address; |
lypinator | 0:bb348c97df44 | 922 | HAL_I2C_Init(handle); |
lypinator | 0:bb348c97df44 | 923 | |
lypinator | 0:bb348c97df44 | 924 | i2c_ev_err_enable(obj, i2c_get_irq_handler(obj)); |
lypinator | 0:bb348c97df44 | 925 | |
lypinator | 0:bb348c97df44 | 926 | HAL_I2C_EnableListen_IT(handle); |
lypinator | 0:bb348c97df44 | 927 | } |
lypinator | 0:bb348c97df44 | 928 | |
lypinator | 0:bb348c97df44 | 929 | void i2c_slave_mode(i2c_t *obj, int enable_slave) |
lypinator | 0:bb348c97df44 | 930 | { |
lypinator | 0:bb348c97df44 | 931 | |
lypinator | 0:bb348c97df44 | 932 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 933 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 934 | |
lypinator | 0:bb348c97df44 | 935 | if (enable_slave) { |
lypinator | 0:bb348c97df44 | 936 | obj_s->slave = 1; |
lypinator | 0:bb348c97df44 | 937 | HAL_I2C_EnableListen_IT(handle); |
lypinator | 0:bb348c97df44 | 938 | } else { |
lypinator | 0:bb348c97df44 | 939 | obj_s->slave = 0; |
lypinator | 0:bb348c97df44 | 940 | HAL_I2C_DisableListen_IT(handle); |
lypinator | 0:bb348c97df44 | 941 | } |
lypinator | 0:bb348c97df44 | 942 | } |
lypinator | 0:bb348c97df44 | 943 | |
lypinator | 0:bb348c97df44 | 944 | // See I2CSlave.h |
lypinator | 0:bb348c97df44 | 945 | #define NoData 0 // the slave has not been addressed |
lypinator | 0:bb348c97df44 | 946 | #define ReadAddressed 1 // the master has requested a read from this slave (slave = transmitter) |
lypinator | 0:bb348c97df44 | 947 | #define WriteGeneral 2 // the master is writing to all slave |
lypinator | 0:bb348c97df44 | 948 | #define WriteAddressed 3 // the master is writing to this slave (slave = receiver) |
lypinator | 0:bb348c97df44 | 949 | |
lypinator | 0:bb348c97df44 | 950 | |
lypinator | 0:bb348c97df44 | 951 | void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode) |
lypinator | 0:bb348c97df44 | 952 | { |
lypinator | 0:bb348c97df44 | 953 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 954 | i2c_t *obj = get_i2c_obj(hi2c); |
lypinator | 0:bb348c97df44 | 955 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 956 | |
lypinator | 0:bb348c97df44 | 957 | /* Transfer direction in HAL is from Master point of view */ |
lypinator | 0:bb348c97df44 | 958 | if (TransferDirection == I2C_DIRECTION_RECEIVE) { |
lypinator | 0:bb348c97df44 | 959 | obj_s->pending_slave_tx_master_rx = 1; |
lypinator | 0:bb348c97df44 | 960 | } |
lypinator | 0:bb348c97df44 | 961 | |
lypinator | 0:bb348c97df44 | 962 | if (TransferDirection == I2C_DIRECTION_TRANSMIT) { |
lypinator | 0:bb348c97df44 | 963 | obj_s->pending_slave_rx_maxter_tx = 1; |
lypinator | 0:bb348c97df44 | 964 | } |
lypinator | 0:bb348c97df44 | 965 | } |
lypinator | 0:bb348c97df44 | 966 | |
lypinator | 0:bb348c97df44 | 967 | void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *I2cHandle) |
lypinator | 0:bb348c97df44 | 968 | { |
lypinator | 0:bb348c97df44 | 969 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 970 | i2c_t *obj = get_i2c_obj(I2cHandle); |
lypinator | 0:bb348c97df44 | 971 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 972 | obj_s->pending_slave_tx_master_rx = 0; |
lypinator | 0:bb348c97df44 | 973 | } |
lypinator | 0:bb348c97df44 | 974 | |
lypinator | 0:bb348c97df44 | 975 | void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *I2cHandle) |
lypinator | 0:bb348c97df44 | 976 | { |
lypinator | 0:bb348c97df44 | 977 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 978 | i2c_t *obj = get_i2c_obj(I2cHandle); |
lypinator | 0:bb348c97df44 | 979 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 980 | obj_s->pending_slave_rx_maxter_tx = 0; |
lypinator | 0:bb348c97df44 | 981 | } |
lypinator | 0:bb348c97df44 | 982 | |
lypinator | 0:bb348c97df44 | 983 | void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c) |
lypinator | 0:bb348c97df44 | 984 | { |
lypinator | 0:bb348c97df44 | 985 | /* restart listening for master requests */ |
lypinator | 0:bb348c97df44 | 986 | HAL_I2C_EnableListen_IT(hi2c); |
lypinator | 0:bb348c97df44 | 987 | } |
lypinator | 0:bb348c97df44 | 988 | |
lypinator | 0:bb348c97df44 | 989 | int i2c_slave_receive(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 990 | { |
lypinator | 0:bb348c97df44 | 991 | |
lypinator | 0:bb348c97df44 | 992 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 993 | int retValue = NoData; |
lypinator | 0:bb348c97df44 | 994 | |
lypinator | 0:bb348c97df44 | 995 | if (obj_s->pending_slave_rx_maxter_tx) { |
lypinator | 0:bb348c97df44 | 996 | retValue = WriteAddressed; |
lypinator | 0:bb348c97df44 | 997 | } |
lypinator | 0:bb348c97df44 | 998 | |
lypinator | 0:bb348c97df44 | 999 | if (obj_s->pending_slave_tx_master_rx) { |
lypinator | 0:bb348c97df44 | 1000 | retValue = ReadAddressed; |
lypinator | 0:bb348c97df44 | 1001 | } |
lypinator | 0:bb348c97df44 | 1002 | |
lypinator | 0:bb348c97df44 | 1003 | return (retValue); |
lypinator | 0:bb348c97df44 | 1004 | } |
lypinator | 0:bb348c97df44 | 1005 | |
lypinator | 0:bb348c97df44 | 1006 | int i2c_slave_read(i2c_t *obj, char *data, int length) |
lypinator | 0:bb348c97df44 | 1007 | { |
lypinator | 0:bb348c97df44 | 1008 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1009 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1010 | int count = 0; |
lypinator | 0:bb348c97df44 | 1011 | int ret = 0; |
lypinator | 0:bb348c97df44 | 1012 | uint32_t timeout = 0; |
lypinator | 0:bb348c97df44 | 1013 | |
lypinator | 0:bb348c97df44 | 1014 | /* Always use I2C_NEXT_FRAME as slave will just adapt to master requests */ |
lypinator | 0:bb348c97df44 | 1015 | ret = HAL_I2C_Slave_Sequential_Receive_IT(handle, (uint8_t *) data, length, I2C_NEXT_FRAME); |
lypinator | 0:bb348c97df44 | 1016 | |
lypinator | 0:bb348c97df44 | 1017 | if (ret == HAL_OK) { |
lypinator | 0:bb348c97df44 | 1018 | timeout = BYTE_TIMEOUT_US * (length + 1); |
lypinator | 0:bb348c97df44 | 1019 | while (obj_s->pending_slave_rx_maxter_tx && (--timeout != 0)) { |
lypinator | 0:bb348c97df44 | 1020 | wait_us(1); |
lypinator | 0:bb348c97df44 | 1021 | } |
lypinator | 0:bb348c97df44 | 1022 | |
lypinator | 0:bb348c97df44 | 1023 | if (timeout != 0) { |
lypinator | 0:bb348c97df44 | 1024 | count = length; |
lypinator | 0:bb348c97df44 | 1025 | } else { |
lypinator | 0:bb348c97df44 | 1026 | DEBUG_PRINTF("TIMEOUT or error in i2c_slave_read\r\n"); |
lypinator | 0:bb348c97df44 | 1027 | } |
lypinator | 0:bb348c97df44 | 1028 | } |
lypinator | 0:bb348c97df44 | 1029 | return count; |
lypinator | 0:bb348c97df44 | 1030 | } |
lypinator | 0:bb348c97df44 | 1031 | |
lypinator | 0:bb348c97df44 | 1032 | int i2c_slave_write(i2c_t *obj, const char *data, int length) |
lypinator | 0:bb348c97df44 | 1033 | { |
lypinator | 0:bb348c97df44 | 1034 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1035 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1036 | int count = 0; |
lypinator | 0:bb348c97df44 | 1037 | int ret = 0; |
lypinator | 0:bb348c97df44 | 1038 | uint32_t timeout = 0; |
lypinator | 0:bb348c97df44 | 1039 | |
lypinator | 0:bb348c97df44 | 1040 | /* Always use I2C_NEXT_FRAME as slave will just adapt to master requests */ |
lypinator | 0:bb348c97df44 | 1041 | ret = HAL_I2C_Slave_Sequential_Transmit_IT(handle, (uint8_t *) data, length, I2C_NEXT_FRAME); |
lypinator | 0:bb348c97df44 | 1042 | |
lypinator | 0:bb348c97df44 | 1043 | if (ret == HAL_OK) { |
lypinator | 0:bb348c97df44 | 1044 | timeout = BYTE_TIMEOUT_US * (length + 1); |
lypinator | 0:bb348c97df44 | 1045 | while (obj_s->pending_slave_tx_master_rx && (--timeout != 0)) { |
lypinator | 0:bb348c97df44 | 1046 | wait_us(1); |
lypinator | 0:bb348c97df44 | 1047 | } |
lypinator | 0:bb348c97df44 | 1048 | |
lypinator | 0:bb348c97df44 | 1049 | if (timeout != 0) { |
lypinator | 0:bb348c97df44 | 1050 | count = length; |
lypinator | 0:bb348c97df44 | 1051 | } else { |
lypinator | 0:bb348c97df44 | 1052 | DEBUG_PRINTF("TIMEOUT or error in i2c_slave_write\r\n"); |
lypinator | 0:bb348c97df44 | 1053 | } |
lypinator | 0:bb348c97df44 | 1054 | } |
lypinator | 0:bb348c97df44 | 1055 | |
lypinator | 0:bb348c97df44 | 1056 | return count; |
lypinator | 0:bb348c97df44 | 1057 | } |
lypinator | 0:bb348c97df44 | 1058 | #endif // DEVICE_I2CSLAVE |
lypinator | 0:bb348c97df44 | 1059 | |
lypinator | 0:bb348c97df44 | 1060 | #if DEVICE_I2C_ASYNCH |
lypinator | 0:bb348c97df44 | 1061 | /* ASYNCH MASTER API FUNCTIONS */ |
lypinator | 0:bb348c97df44 | 1062 | void HAL_I2C_AbortCpltCallback(I2C_HandleTypeDef *hi2c) |
lypinator | 0:bb348c97df44 | 1063 | { |
lypinator | 0:bb348c97df44 | 1064 | /* Get object ptr based on handler ptr */ |
lypinator | 0:bb348c97df44 | 1065 | i2c_t *obj = get_i2c_obj(hi2c); |
lypinator | 0:bb348c97df44 | 1066 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1067 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1068 | |
lypinator | 0:bb348c97df44 | 1069 | /* Disable IT. Not always done before calling macro */ |
lypinator | 0:bb348c97df44 | 1070 | __HAL_I2C_DISABLE_IT(handle, I2C_IT_ALL); |
lypinator | 0:bb348c97df44 | 1071 | i2c_ev_err_disable(obj); |
lypinator | 0:bb348c97df44 | 1072 | |
lypinator | 0:bb348c97df44 | 1073 | /* Set event flag */ |
lypinator | 0:bb348c97df44 | 1074 | obj_s->event = I2C_EVENT_ERROR; |
lypinator | 0:bb348c97df44 | 1075 | } |
lypinator | 0:bb348c97df44 | 1076 | |
lypinator | 0:bb348c97df44 | 1077 | 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) |
lypinator | 0:bb348c97df44 | 1078 | { |
lypinator | 0:bb348c97df44 | 1079 | |
lypinator | 0:bb348c97df44 | 1080 | // TODO: DMA usage is currently ignored by this way |
lypinator | 0:bb348c97df44 | 1081 | (void) hint; |
lypinator | 0:bb348c97df44 | 1082 | |
lypinator | 0:bb348c97df44 | 1083 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1084 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1085 | |
lypinator | 0:bb348c97df44 | 1086 | /* Update object */ |
lypinator | 0:bb348c97df44 | 1087 | obj->tx_buff.buffer = (void *)tx; |
lypinator | 0:bb348c97df44 | 1088 | obj->tx_buff.length = tx_length; |
lypinator | 0:bb348c97df44 | 1089 | obj->tx_buff.pos = 0; |
lypinator | 0:bb348c97df44 | 1090 | obj->tx_buff.width = 8; |
lypinator | 0:bb348c97df44 | 1091 | |
lypinator | 0:bb348c97df44 | 1092 | obj->rx_buff.buffer = (void *)rx; |
lypinator | 0:bb348c97df44 | 1093 | obj->rx_buff.length = rx_length; |
lypinator | 0:bb348c97df44 | 1094 | obj->rx_buff.pos = SIZE_MAX; |
lypinator | 0:bb348c97df44 | 1095 | obj->rx_buff.width = 8; |
lypinator | 0:bb348c97df44 | 1096 | |
lypinator | 0:bb348c97df44 | 1097 | obj_s->available_events = event; |
lypinator | 0:bb348c97df44 | 1098 | obj_s->event = 0; |
lypinator | 0:bb348c97df44 | 1099 | obj_s->address = address; |
lypinator | 0:bb348c97df44 | 1100 | obj_s->stop = stop; |
lypinator | 0:bb348c97df44 | 1101 | |
lypinator | 0:bb348c97df44 | 1102 | i2c_ev_err_enable(obj, handler); |
lypinator | 0:bb348c97df44 | 1103 | |
lypinator | 0:bb348c97df44 | 1104 | /* Set operation step depending if stop sending required or not */ |
lypinator | 0:bb348c97df44 | 1105 | if ((tx_length && !rx_length) || (!tx_length && rx_length)) { |
lypinator | 0:bb348c97df44 | 1106 | // Trick to remove compiler warning "left and right operands are identical" in some cases |
lypinator | 0:bb348c97df44 | 1107 | uint32_t op1 = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 1108 | uint32_t op2 = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 1109 | if ((obj_s->XferOperation == op1) || (obj_s->XferOperation == op2)) { |
lypinator | 0:bb348c97df44 | 1110 | if (stop) { |
lypinator | 0:bb348c97df44 | 1111 | obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 1112 | } else { |
lypinator | 0:bb348c97df44 | 1113 | obj_s->XferOperation = I2C_FIRST_FRAME; |
lypinator | 0:bb348c97df44 | 1114 | } |
lypinator | 0:bb348c97df44 | 1115 | } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) || |
lypinator | 0:bb348c97df44 | 1116 | (obj_s->XferOperation == I2C_NEXT_FRAME)) { |
lypinator | 0:bb348c97df44 | 1117 | if (stop) { |
lypinator | 0:bb348c97df44 | 1118 | obj_s->XferOperation = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 1119 | } else { |
lypinator | 0:bb348c97df44 | 1120 | obj_s->XferOperation = I2C_NEXT_FRAME; |
lypinator | 0:bb348c97df44 | 1121 | } |
lypinator | 0:bb348c97df44 | 1122 | } |
lypinator | 0:bb348c97df44 | 1123 | |
lypinator | 0:bb348c97df44 | 1124 | if (tx_length > 0) { |
lypinator | 0:bb348c97df44 | 1125 | HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t *)tx, tx_length, obj_s->XferOperation); |
lypinator | 0:bb348c97df44 | 1126 | } |
lypinator | 0:bb348c97df44 | 1127 | if (rx_length > 0) { |
lypinator | 0:bb348c97df44 | 1128 | HAL_I2C_Master_Sequential_Receive_IT(handle, address, (uint8_t *)rx, rx_length, obj_s->XferOperation); |
lypinator | 0:bb348c97df44 | 1129 | } |
lypinator | 0:bb348c97df44 | 1130 | } else if (tx_length && rx_length) { |
lypinator | 0:bb348c97df44 | 1131 | /* Two steps operation, don't modify XferOperation, keep it for next step */ |
lypinator | 0:bb348c97df44 | 1132 | // Trick to remove compiler warning "left and right operands are identical" in some cases |
lypinator | 0:bb348c97df44 | 1133 | uint32_t op1 = I2C_FIRST_AND_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 1134 | uint32_t op2 = I2C_LAST_FRAME; |
lypinator | 0:bb348c97df44 | 1135 | if ((obj_s->XferOperation == op1) || (obj_s->XferOperation == op2)) { |
lypinator | 0:bb348c97df44 | 1136 | HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t *)tx, tx_length, I2C_FIRST_FRAME); |
lypinator | 0:bb348c97df44 | 1137 | } else if ((obj_s->XferOperation == I2C_FIRST_FRAME) || |
lypinator | 0:bb348c97df44 | 1138 | (obj_s->XferOperation == I2C_NEXT_FRAME)) { |
lypinator | 0:bb348c97df44 | 1139 | HAL_I2C_Master_Sequential_Transmit_IT(handle, address, (uint8_t *)tx, tx_length, I2C_NEXT_FRAME); |
lypinator | 0:bb348c97df44 | 1140 | } |
lypinator | 0:bb348c97df44 | 1141 | } |
lypinator | 0:bb348c97df44 | 1142 | } |
lypinator | 0:bb348c97df44 | 1143 | |
lypinator | 0:bb348c97df44 | 1144 | |
lypinator | 0:bb348c97df44 | 1145 | uint32_t i2c_irq_handler_asynch(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 1146 | { |
lypinator | 0:bb348c97df44 | 1147 | |
lypinator | 0:bb348c97df44 | 1148 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1149 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1150 | |
lypinator | 0:bb348c97df44 | 1151 | HAL_I2C_EV_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 1152 | HAL_I2C_ER_IRQHandler(handle); |
lypinator | 0:bb348c97df44 | 1153 | |
lypinator | 0:bb348c97df44 | 1154 | /* Return I2C event status */ |
lypinator | 0:bb348c97df44 | 1155 | return (obj_s->event & obj_s->available_events); |
lypinator | 0:bb348c97df44 | 1156 | } |
lypinator | 0:bb348c97df44 | 1157 | |
lypinator | 0:bb348c97df44 | 1158 | uint8_t i2c_active(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 1159 | { |
lypinator | 0:bb348c97df44 | 1160 | |
lypinator | 0:bb348c97df44 | 1161 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1162 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1163 | |
lypinator | 0:bb348c97df44 | 1164 | if (handle->State == HAL_I2C_STATE_READY) { |
lypinator | 0:bb348c97df44 | 1165 | return 0; |
lypinator | 0:bb348c97df44 | 1166 | } else { |
lypinator | 0:bb348c97df44 | 1167 | return 1; |
lypinator | 0:bb348c97df44 | 1168 | } |
lypinator | 0:bb348c97df44 | 1169 | } |
lypinator | 0:bb348c97df44 | 1170 | |
lypinator | 0:bb348c97df44 | 1171 | void i2c_abort_asynch(i2c_t *obj) |
lypinator | 0:bb348c97df44 | 1172 | { |
lypinator | 0:bb348c97df44 | 1173 | |
lypinator | 0:bb348c97df44 | 1174 | struct i2c_s *obj_s = I2C_S(obj); |
lypinator | 0:bb348c97df44 | 1175 | I2C_HandleTypeDef *handle = &(obj_s->handle); |
lypinator | 0:bb348c97df44 | 1176 | |
lypinator | 0:bb348c97df44 | 1177 | /* Abort HAL requires DevAddress, but is not used. Use Dummy */ |
lypinator | 0:bb348c97df44 | 1178 | uint16_t Dummy_DevAddress = 0x00; |
lypinator | 0:bb348c97df44 | 1179 | |
lypinator | 0:bb348c97df44 | 1180 | HAL_I2C_Master_Abort_IT(handle, Dummy_DevAddress); |
lypinator | 0:bb348c97df44 | 1181 | } |
lypinator | 0:bb348c97df44 | 1182 | |
lypinator | 0:bb348c97df44 | 1183 | #endif // DEVICE_I2C_ASYNCH |
lypinator | 0:bb348c97df44 | 1184 | |
lypinator | 0:bb348c97df44 | 1185 | #endif // DEVICE_I2C |