Sun, 02 Apr 2023 09:33:20 +0200
Fixed start of json status message.
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1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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1 | /* |
1c9894662795
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2 | * The MIT License (MIT) |
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3 | * |
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4 | * Copyright (c) 2018 Ruslan V. Uss <unclerus@gmail.com> |
1c9894662795
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
1c9894662795
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7 | * of this software and associated documentation files (the "Software"), to deal |
1c9894662795
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8 | * in the Software without restriction, including without limitation the rights |
1c9894662795
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
1c9894662795
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10 | * copies of the Software, and to permit persons to whom the Software is |
1c9894662795
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11 | * furnished to do so, subject to the following conditions: |
1c9894662795
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12 | * The above copyright notice and this permission notice shall be included in all |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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13 | * copies or substantial portions of the Software. |
1c9894662795
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14 | * |
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15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
1c9894662795
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17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
1c9894662795
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19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
1c9894662795
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20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
1c9894662795
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21 | * SOFTWARE. |
1c9894662795
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22 | */ |
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23 | |
1c9894662795
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24 | /** |
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25 | * @file i2cdev.c |
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26 | * |
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27 | * ESP-IDF I2C master thread-safe functions for communication with I2C slave |
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28 | * |
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29 | * Copyright (c) 2018 Ruslan V. Uss <unclerus@gmail.com> |
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30 | * |
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31 | * MIT Licensed as described in the file LICENSE |
1c9894662795
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32 | */ |
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33 | #include <string.h> |
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34 | #include <inttypes.h> |
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35 | #include <freertos/FreeRTOS.h> |
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36 | #include <freertos/task.h> |
1c9894662795
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37 | #include <esp_log.h> |
1c9894662795
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38 | #include "i2cdev.h" |
1c9894662795
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39 | |
1c9894662795
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40 | static const char *TAG = "i2cdev"; |
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41 | |
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42 | typedef struct { |
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43 | SemaphoreHandle_t lock; |
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44 | i2c_config_t config; |
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45 | bool installed; |
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46 | } i2c_port_state_t; |
1c9894662795
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47 | |
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48 | static i2c_port_state_t states[I2C_NUM_MAX]; |
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49 | |
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50 | #if CONFIG_I2CDEV_NOLOCK |
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51 | #define SEMAPHORE_TAKE(port) |
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52 | #else |
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53 | #define SEMAPHORE_TAKE(port) do { \ |
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54 | if (!xSemaphoreTake(states[port].lock, pdMS_TO_TICKS(CONFIG_I2CDEV_TIMEOUT))) \ |
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55 | { \ |
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56 | ESP_LOGE(TAG, "Could not take port mutex %d", port); \ |
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57 | return ESP_ERR_TIMEOUT; \ |
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58 | } \ |
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59 | } while (0) |
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60 | #endif |
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61 | |
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62 | #if CONFIG_I2CDEV_NOLOCK |
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63 | #define SEMAPHORE_GIVE(port) |
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64 | #else |
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65 | #define SEMAPHORE_GIVE(port) do { \ |
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66 | if (!xSemaphoreGive(states[port].lock)) \ |
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67 | { \ |
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68 | ESP_LOGE(TAG, "Could not give port mutex %d", port); \ |
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69 | return ESP_FAIL; \ |
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70 | } \ |
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71 | } while (0) |
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72 | #endif |
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73 | |
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74 | esp_err_t i2cdev_init() |
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75 | { |
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76 | memset(states, 0, sizeof(states)); |
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77 | |
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78 | #if !CONFIG_I2CDEV_NOLOCK |
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79 | for (int i = 0; i < I2C_NUM_MAX; i++) |
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80 | { |
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81 | states[i].lock = xSemaphoreCreateMutex(); |
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82 | if (!states[i].lock) |
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83 | { |
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84 | ESP_LOGE(TAG, "Could not create port mutex %d", i); |
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85 | return ESP_FAIL; |
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86 | } |
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87 | } |
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88 | #endif |
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89 | |
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90 | return ESP_OK; |
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91 | } |
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92 | |
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93 | esp_err_t i2cdev_done() |
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94 | { |
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95 | for (int i = 0; i < I2C_NUM_MAX; i++) |
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96 | { |
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97 | if (!states[i].lock) continue; |
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98 | |
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99 | if (states[i].installed) |
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100 | { |
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101 | SEMAPHORE_TAKE(i); |
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102 | i2c_driver_delete(i); |
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103 | states[i].installed = false; |
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104 | SEMAPHORE_GIVE(i); |
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105 | } |
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106 | #if !CONFIG_I2CDEV_NOLOCK |
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107 | vSemaphoreDelete(states[i].lock); |
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108 | #endif |
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109 | states[i].lock = NULL; |
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110 | } |
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111 | return ESP_OK; |
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112 | } |
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113 | |
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114 | esp_err_t i2c_dev_create_mutex(i2c_dev_t *dev) |
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115 | { |
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116 | #if !CONFIG_I2CDEV_NOLOCK |
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117 | if (!dev) return ESP_ERR_INVALID_ARG; |
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118 | |
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119 | ESP_LOGV(TAG, "[0x%02x at %d] creating mutex", dev->addr, dev->port); |
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120 | |
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121 | dev->mutex = xSemaphoreCreateMutex(); |
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122 | if (!dev->mutex) |
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123 | { |
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124 | ESP_LOGE(TAG, "[0x%02x at %d] Could not create device mutex", dev->addr, dev->port); |
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125 | return ESP_FAIL; |
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126 | } |
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127 | #endif |
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128 | |
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129 | return ESP_OK; |
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130 | } |
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131 | |
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132 | esp_err_t i2c_dev_delete_mutex(i2c_dev_t *dev) |
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133 | { |
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134 | #if !CONFIG_I2CDEV_NOLOCK |
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135 | if (!dev) return ESP_ERR_INVALID_ARG; |
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136 | |
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137 | ESP_LOGV(TAG, "[0x%02x at %d] deleting mutex", dev->addr, dev->port); |
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138 | |
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139 | vSemaphoreDelete(dev->mutex); |
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140 | #endif |
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141 | return ESP_OK; |
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142 | } |
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143 | |
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144 | esp_err_t i2c_dev_take_mutex(i2c_dev_t *dev) |
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145 | { |
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146 | #if !CONFIG_I2CDEV_NOLOCK |
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147 | if (!dev) return ESP_ERR_INVALID_ARG; |
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148 | |
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149 | ESP_LOGV(TAG, "[0x%02x at %d] taking mutex", dev->addr, dev->port); |
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150 | |
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151 | if (!xSemaphoreTake(dev->mutex, pdMS_TO_TICKS(CONFIG_I2CDEV_TIMEOUT))) |
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152 | { |
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153 | ESP_LOGE(TAG, "[0x%02x at %d] Could not take device mutex", dev->addr, dev->port); |
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154 | return ESP_ERR_TIMEOUT; |
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155 | } |
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156 | #endif |
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157 | return ESP_OK; |
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158 | } |
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159 | |
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160 | esp_err_t i2c_dev_give_mutex(i2c_dev_t *dev) |
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161 | { |
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162 | #if !CONFIG_I2CDEV_NOLOCK |
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163 | if (!dev) return ESP_ERR_INVALID_ARG; |
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164 | |
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165 | ESP_LOGV(TAG, "[0x%02x at %d] giving mutex", dev->addr, dev->port); |
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166 | |
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167 | if (!xSemaphoreGive(dev->mutex)) |
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168 | { |
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169 | ESP_LOGE(TAG, "[0x%02x at %d] Could not give device mutex", dev->addr, dev->port); |
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170 | return ESP_FAIL; |
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171 | } |
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172 | #endif |
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173 | return ESP_OK; |
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174 | } |
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175 | |
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176 | inline static bool cfg_equal(const i2c_config_t *a, const i2c_config_t *b) |
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177 | { |
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178 | return a->scl_io_num == b->scl_io_num |
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179 | && a->sda_io_num == b->sda_io_num |
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180 | #if HELPER_TARGET_IS_ESP32 |
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181 | && a->master.clk_speed == b->master.clk_speed |
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182 | #elif HELPER_TARGET_IS_ESP8266 |
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183 | && a->clk_stretch_tick == b->clk_stretch_tick |
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184 | #endif |
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185 | && a->scl_pullup_en == b->scl_pullup_en |
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186 | && a->sda_pullup_en == b->sda_pullup_en; |
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187 | } |
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188 | |
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189 | static esp_err_t i2c_setup_port(const i2c_dev_t *dev) |
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190 | { |
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191 | if (dev->port >= I2C_NUM_MAX) return ESP_ERR_INVALID_ARG; |
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192 | |
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193 | esp_err_t res; |
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194 | if (!cfg_equal(&dev->cfg, &states[dev->port].config) || !states[dev->port].installed) |
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195 | { |
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196 | ESP_LOGD(TAG, "Reconfiguring I2C driver on port %d", dev->port); |
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197 | i2c_config_t temp; |
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198 | memcpy(&temp, &dev->cfg, sizeof(i2c_config_t)); |
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199 | temp.mode = I2C_MODE_MASTER; |
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200 | |
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201 | // Driver reinstallation |
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202 | if (states[dev->port].installed) |
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203 | { |
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204 | i2c_driver_delete(dev->port); |
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205 | states[dev->port].installed = false; |
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206 | } |
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207 | #if HELPER_TARGET_IS_ESP32 |
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208 | #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0) |
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209 | // See https://github.com/espressif/esp-idf/issues/10163 |
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210 | if ((res = i2c_driver_install(dev->port, temp.mode, 0, 0, 0)) != ESP_OK) |
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211 | return res; |
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212 | if ((res = i2c_param_config(dev->port, &temp)) != ESP_OK) |
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213 | return res; |
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214 | #else |
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215 | if ((res = i2c_param_config(dev->port, &temp)) != ESP_OK) |
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216 | return res; |
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217 | if ((res = i2c_driver_install(dev->port, temp.mode, 0, 0, 0)) != ESP_OK) |
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218 | return res; |
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219 | #endif |
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220 | #endif |
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221 | #if HELPER_TARGET_IS_ESP8266 |
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222 | // Clock Stretch time, depending on CPU frequency |
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223 | temp.clk_stretch_tick = dev->timeout_ticks ? dev->timeout_ticks : I2CDEV_MAX_STRETCH_TIME; |
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224 | if ((res = i2c_driver_install(dev->port, temp.mode)) != ESP_OK) |
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225 | return res; |
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226 | if ((res = i2c_param_config(dev->port, &temp)) != ESP_OK) |
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227 | return res; |
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228 | #endif |
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229 | states[dev->port].installed = true; |
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230 | |
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231 | memcpy(&states[dev->port].config, &temp, sizeof(i2c_config_t)); |
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232 | ESP_LOGD(TAG, "I2C driver successfully reconfigured on port %d", dev->port); |
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233 | } |
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234 | #if HELPER_TARGET_IS_ESP32 |
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235 | int t; |
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236 | if ((res = i2c_get_timeout(dev->port, &t)) != ESP_OK) |
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237 | return res; |
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238 | // Timeout cannot be 0 |
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239 | uint32_t ticks = dev->timeout_ticks ? dev->timeout_ticks : I2CDEV_MAX_STRETCH_TIME; |
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240 | if ((ticks != t) && (res = i2c_set_timeout(dev->port, ticks)) != ESP_OK) |
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241 | return res; |
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242 | ESP_LOGD(TAG, "Timeout: ticks = %" PRIu32 " (%" PRIu32 " usec) on port %d", dev->timeout_ticks, dev->timeout_ticks / 80, dev->port); |
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243 | #endif |
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244 | |
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245 | return ESP_OK; |
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246 | } |
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247 | |
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248 | esp_err_t i2c_dev_probe(const i2c_dev_t *dev, i2c_dev_type_t operation_type) |
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249 | { |
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250 | if (!dev) return ESP_ERR_INVALID_ARG; |
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251 | |
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252 | SEMAPHORE_TAKE(dev->port); |
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253 | |
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254 | esp_err_t res = i2c_setup_port(dev); |
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255 | if (res == ESP_OK) |
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256 | { |
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257 | i2c_cmd_handle_t cmd = i2c_cmd_link_create(); |
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258 | i2c_master_start(cmd); |
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259 | i2c_master_write_byte(cmd, dev->addr << 1 | (operation_type == I2C_DEV_READ ? 1 : 0), true); |
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260 | i2c_master_stop(cmd); |
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261 | |
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262 | res = i2c_master_cmd_begin(dev->port, cmd, pdMS_TO_TICKS(CONFIG_I2CDEV_TIMEOUT)); |
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263 | |
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264 | i2c_cmd_link_delete(cmd); |
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265 | } |
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266 | |
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267 | SEMAPHORE_GIVE(dev->port); |
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268 | |
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269 | return res; |
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270 | } |
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271 | |
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272 | esp_err_t i2c_dev_read(const i2c_dev_t *dev, const void *out_data, size_t out_size, void *in_data, size_t in_size) |
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273 | { |
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274 | if (!dev || !in_data || !in_size) return ESP_ERR_INVALID_ARG; |
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275 | |
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276 | SEMAPHORE_TAKE(dev->port); |
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277 | |
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278 | esp_err_t res = i2c_setup_port(dev); |
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279 | if (res == ESP_OK) |
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280 | { |
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281 | i2c_cmd_handle_t cmd = i2c_cmd_link_create(); |
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282 | if (out_data && out_size) |
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283 | { |
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284 | i2c_master_start(cmd); |
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285 | i2c_master_write_byte(cmd, dev->addr << 1, true); |
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286 | i2c_master_write(cmd, (void *)out_data, out_size, true); |
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287 | } |
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288 | i2c_master_start(cmd); |
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289 | i2c_master_write_byte(cmd, (dev->addr << 1) | 1, true); |
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290 | i2c_master_read(cmd, in_data, in_size, I2C_MASTER_LAST_NACK); |
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291 | i2c_master_stop(cmd); |
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292 | |
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293 | res = i2c_master_cmd_begin(dev->port, cmd, pdMS_TO_TICKS(CONFIG_I2CDEV_TIMEOUT)); |
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294 | if (res != ESP_OK) |
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295 | ESP_LOGE(TAG, "Could not read from device [0x%02x at %d]: %d (%s)", dev->addr, dev->port, res, esp_err_to_name(res)); |
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296 | |
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297 | i2c_cmd_link_delete(cmd); |
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298 | } |
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299 | |
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300 | SEMAPHORE_GIVE(dev->port); |
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301 | return res; |
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302 | } |
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303 | |
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304 | esp_err_t i2c_dev_write(const i2c_dev_t *dev, const void *out_reg, size_t out_reg_size, const void *out_data, size_t out_size) |
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305 | { |
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306 | if (!dev || !out_data || !out_size) return ESP_ERR_INVALID_ARG; |
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307 | |
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308 | SEMAPHORE_TAKE(dev->port); |
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309 | |
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310 | esp_err_t res = i2c_setup_port(dev); |
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311 | if (res == ESP_OK) |
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312 | { |
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313 | i2c_cmd_handle_t cmd = i2c_cmd_link_create(); |
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314 | i2c_master_start(cmd); |
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315 | i2c_master_write_byte(cmd, dev->addr << 1, true); |
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316 | if (out_reg && out_reg_size) |
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317 | i2c_master_write(cmd, (void *)out_reg, out_reg_size, true); |
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318 | i2c_master_write(cmd, (void *)out_data, out_size, true); |
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319 | i2c_master_stop(cmd); |
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320 | res = i2c_master_cmd_begin(dev->port, cmd, pdMS_TO_TICKS(CONFIG_I2CDEV_TIMEOUT)); |
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321 | if (res != ESP_OK) |
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322 | ESP_LOGE(TAG, "Could not write to device [0x%02x at %d]: %d (%s)", dev->addr, dev->port, res, esp_err_to_name(res)); |
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323 | i2c_cmd_link_delete(cmd); |
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324 | } |
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325 | |
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326 | SEMAPHORE_GIVE(dev->port); |
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327 | return res; |
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328 | } |
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329 | |
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330 | esp_err_t i2c_dev_read_reg(const i2c_dev_t *dev, uint8_t reg, void *in_data, size_t in_size) |
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331 | { |
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332 | return i2c_dev_read(dev, ®, 1, in_data, in_size); |
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333 | } |
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334 | |
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335 | esp_err_t i2c_dev_write_reg(const i2c_dev_t *dev, uint8_t reg, const void *out_data, size_t out_size) |
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336 | { |
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337 | return i2c_dev_write(dev, ®, 1, out_data, out_size); |
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338 | } |