Sun, 02 Apr 2023 09:33:20 +0200
Fixed start of json status message.
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1 | /* |
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2 | * SPDX-License-Identifier: ISC |
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3 | * |
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4 | * Copyright (c) 2022 Marc Luehr <marcluehr@gmail.com> |
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5 | * |
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6 | * Permission to use, copy, modify, and distribute this software for any |
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7 | * purpose with or without fee is hereby granted, provided that the above |
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8 | * copyright notice and this permission notice appear in all copies. |
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9 | * |
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10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 | */ |
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18 | |
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19 | /** |
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20 | * @file veml7700.h |
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21 | * @defgroup veml7700 veml7700 |
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22 | * @{ |
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23 | * |
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24 | * ESP-IDF driver for VEML7700 brightness sensors for I2C-bus |
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25 | * |
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26 | * Copyright (c) 2022 Marc Luehr <marcluehr@gmail.com> |
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27 | * |
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28 | * ISC Licensed as described in the file LICENSE |
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29 | */ |
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30 | #ifndef __VEML7700_H__ |
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31 | #define __VEML7700_H__ |
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32 | |
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33 | #include <stddef.h> |
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34 | #include <i2cdev.h> |
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35 | #include <esp_err.h> |
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36 | |
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37 | #ifdef __cplusplus |
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38 | extern "C" { |
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39 | #endif |
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40 | |
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41 | #define VEML7700_I2C_ADDR (0x10) |
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42 | |
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43 | #define VEML7700_INTEGRATION_TIME_25MS (0b1100) |
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44 | #define VEML7700_INTEGRATION_TIME_50MS (0b1000) |
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45 | #define VEML7700_INTEGRATION_TIME_100MS (0b0000) |
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46 | #define VEML7700_INTEGRATION_TIME_200MS (0b0001) |
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47 | #define VEML7700_INTEGRATION_TIME_400MS (0b0010) |
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48 | #define VEML7700_INTEGRATION_TIME_800MS (0b0011) |
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49 | |
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50 | #define VEML7700_GAIN_1 (0b00) |
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51 | #define VEML7700_GAIN_2 (0b01) |
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52 | #define VEML7700_GAIN_DIV_8 (0b10) |
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53 | #define VEML7700_GAIN_DIV_4 (0b11) |
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54 | |
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55 | #define VEML7700_POWER_SAVING_MODE_500MS (0b00) |
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56 | #define VEML7700_POWER_SAVING_MODE_1000MS (0b01) |
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57 | #define VEML7700_POWER_SAVING_MODE_2000MS (0b10) |
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58 | #define VEML7700_POWER_SAVING_MODE_4000MS (0b11) |
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59 | |
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60 | #define VEML7700_PERSISTENCE_PROTECTION_1 (0b00) |
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61 | #define VEML7700_PERSISTENCE_PROTECTION_2 (0b01) |
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62 | #define VEML7700_PERSISTENCE_PROTECTION_4 (0b10) |
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63 | #define VEML7700_PERSISTENCE_PROTECTION_8 (0b11) |
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64 | |
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65 | /** |
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66 | * VEML configuration descriptor |
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67 | */ |
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68 | typedef struct |
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69 | { |
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70 | uint16_t gain : 2; //!< control the sensitivity |
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71 | uint16_t integration_time : 4; //!< time to measure |
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72 | uint16_t persistence_protect : 2; //!< sample count before the interrupt triggers |
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73 | uint16_t interrupt_enable : 1; //!< enable threshold interrupt |
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74 | uint16_t shutdown : 1; //!< set to 1 to shutdown the device, set to 0 to wakeup |
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75 | uint16_t threshold_high; //!< high threshold for the interrupt |
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76 | uint16_t threshold_low; //!< low threshold for the interrupt |
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77 | uint16_t power_saving_mode : 2; //!< power saving mode |
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78 | uint16_t power_saving_enable : 1; //!< enable the pover saving mode |
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79 | } veml7700_config_t; |
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80 | |
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81 | /** |
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82 | * @brief Initialize device descriptor |
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83 | * |
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84 | * Default SCL frequency is 100kHz. The I2C address is fix. |
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85 | * |
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86 | * @param dev Pointer to I2C device descriptor |
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87 | * @param port I2C port number |
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88 | * @param sda_gpio SDA GPIO |
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89 | * @param scl_gpio SCL GPIO |
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90 | * @return `ESP_OK` on success |
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91 | */ |
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92 | esp_err_t veml7700_init_desc(i2c_dev_t *dev, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio); |
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93 | |
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94 | /** |
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95 | * @brief Free device descriptor |
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96 | * |
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97 | * @param dev Pointer to I2C device descriptor |
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98 | * @return `ESP_OK` on success |
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99 | */ |
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100 | esp_err_t veml7700_free_desc(i2c_dev_t *dev); |
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101 | |
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102 | /** |
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103 | * @brief Probe if the device exist on the bus |
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104 | * |
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105 | * @param dev Pointer to I2C device descriptor |
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106 | * @return `ESP_OK` on success |
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107 | */ |
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108 | esp_err_t veml7700_probe(i2c_dev_t *dev); |
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109 | |
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110 | /** |
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111 | * @brief Write the config to the device |
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112 | * |
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113 | * @param dev Pointer to I2C device descriptor |
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114 | * @param config Pointer to the config descriptor |
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115 | * @return `ESP_OK` on success |
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116 | */ |
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117 | esp_err_t veml7700_set_config(i2c_dev_t *dev, veml7700_config_t *config); |
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118 | |
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119 | /** |
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120 | * @brief Read the config to the device |
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121 | * |
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122 | * @param dev Pointer to I2C device descriptor |
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123 | * @param config Pointer to the config descriptor |
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124 | * @return `ESP_OK` on success |
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125 | */ |
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126 | esp_err_t veml7700_get_config(i2c_dev_t *dev, veml7700_config_t *config); |
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127 | |
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128 | /** |
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129 | * @brief Read ambient light sensor value from the device |
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130 | * |
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131 | * @param dev Pointer to I2C device descriptor |
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132 | * @param config Pointer to the config descriptor |
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133 | * @param value_lux Pointer as return value in lux |
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134 | * @return `ESP_OK` on success |
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135 | */ |
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136 | esp_err_t veml7700_get_ambient_light(i2c_dev_t *dev, veml7700_config_t *config, uint32_t *value_lux); |
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137 | |
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138 | /** |
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139 | * @brief Read white channel value from the device |
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140 | * |
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141 | * @param dev Pointer to I2C device descriptor |
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142 | * @param config Pointer to the config descriptor |
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143 | * @param value_lux Pointer as return value in lux |
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144 | * @return `ESP_OK` on success |
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145 | */ |
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146 | esp_err_t veml7700_get_white_channel(i2c_dev_t *dev, veml7700_config_t *config, uint32_t *value_lux); |
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147 | |
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148 | /** |
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149 | * @brief Read the interrupt status from the device |
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150 | * |
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151 | * @param dev Pointer to I2C device descriptor |
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152 | * @param low_threshold Pointer to return the low threshold passed indicator |
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153 | * @param high_threshold Pointer to return the high threshold passed indicator |
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154 | * @return `ESP_OK` on success |
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155 | */ |
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156 | esp_err_t veml7700_get_interrupt_status(i2c_dev_t *dev, bool *low_threshold, bool *high_threshold); |
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157 | |
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158 | #ifdef __cplusplus |
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159 | } |
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160 | #endif |
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161 | |
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162 | /**@}*/ |
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163 | |
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164 | #endif /* __VEML7700_H__ */ |