Fri, 08 Nov 2019 22:40:15 +0100
Increaded stacksize for the user process. Implemented the network update using the proven brewboard code. Reverted the lock release and display sendbuffer lines to the previous code. The networks status screen uses the wifi lock.
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1 | /* |
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2 | * MIT License |
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3 | * |
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4 | * Copyright (c) 2017 David Antliff |
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5 | * Copyright (c) 2017 Chris Morgan <chmorgan@gmail.com> |
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6 | * |
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7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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8 | * of this software and associated documentation files (the "Software"), to deal |
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9 | * in the Software without restriction, including without limitation the rights |
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10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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11 | * copies of the Software, and to permit persons to whom the Software is |
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12 | * furnished to do so, subject to the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice shall be included in all |
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15 | * copies or substantial portions of the Software. |
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16 | * |
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17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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23 | * SOFTWARE. |
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24 | */ |
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25 | |
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26 | /** |
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27 | * @file |
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28 | * @brief Interface definitions for the 1-Wire bus component. |
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29 | * |
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30 | * This component provides structures and functions that are useful for communicating |
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31 | * with devices connected to a Maxim Integrated 1-Wire® bus via a single GPIO. |
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32 | * |
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33 | * Currently only externally powered devices are supported. Parasitic power is not supported. |
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34 | */ |
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35 | |
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36 | #ifndef ONE_WIRE_BUS_H |
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37 | #define ONE_WIRE_BUS_H |
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38 | |
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39 | #include <stdint.h> |
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40 | #include <stdbool.h> |
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41 | #include <stddef.h> |
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42 | |
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43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
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46 | |
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47 | |
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48 | // ROM commands |
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49 | #define OWB_ROM_SEARCH 0xF0 ///< Command ROM search |
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50 | #define OWB_ROM_READ 0x33 ///< ROM read |
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51 | #define OWB_ROM_MATCH 0x55 ///< ROM address match |
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52 | #define OWB_ROM_SKIP 0xCC ///< Skip device |
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53 | #define OWB_ROM_SEARCH_ALARM 0xEC ///< Search device with alarm set |
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54 | |
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55 | #define OWB_ROM_CODE_STRING_LENGTH (17) ///< Typical length of OneWire bus ROM ID as ASCII hex string, including null terminator |
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56 | |
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57 | struct owb_driver; |
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58 | |
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59 | /** |
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60 | * @brief Structure containing 1-Wire bus information relevant to a single instance. |
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61 | */ |
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62 | typedef struct |
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63 | { |
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64 | const struct _OneWireBus_Timing * timing; ///< Pointer to timing information |
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65 | bool use_crc; ///< True if CRC checks are to be used when retrieving information from a device on the bus |
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66 | |
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67 | const struct owb_driver *driver; |
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68 | } OneWireBus; |
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69 | |
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70 | /** |
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71 | * @brief Represents a 1-Wire ROM Code. This is a sequence of eight bytes, where |
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72 | * the first byte is the family number, then the following 6 bytes form the |
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73 | * serial number. The final byte is the CRC8 check byte. |
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74 | */ |
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75 | typedef union |
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76 | { |
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77 | /// Provides access via field names |
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78 | struct fields |
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79 | { |
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80 | uint8_t family[1]; ///< family identifier (1 byte, LSB - read/write first) |
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81 | uint8_t serial_number[6]; ///< serial number (6 bytes) |
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82 | uint8_t crc[1]; ///< CRC check byte (1 byte, MSB - read/write last) |
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83 | } fields; ///< Provides access via field names |
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84 | |
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85 | uint8_t bytes[8]; ///< Provides raw byte access |
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86 | |
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87 | } OneWireBus_ROMCode; |
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88 | |
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89 | /** |
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90 | * @brief Represents the state of a device search on the 1-Wire bus. |
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91 | * |
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92 | * Pass a pointer to this structure to owb_search_first() and |
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93 | * owb_search_next() to iterate through detected devices on the bus. |
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94 | */ |
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95 | typedef struct |
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96 | { |
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97 | OneWireBus_ROMCode rom_code; |
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98 | int last_discrepancy; |
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99 | int last_family_discrepancy; |
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100 | int last_device_flag; |
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101 | } OneWireBus_SearchState; |
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102 | |
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103 | /** |
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104 | * @brief Status codes |
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105 | */ |
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106 | typedef enum |
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107 | { |
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108 | OWB_STATUS_OK, ///< Ok |
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109 | OWB_STATUS_NOT_INITIALIZED, ///< Init error |
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110 | OWB_STATUS_PARAMETER_NULL, ///< NULL parameter |
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111 | OWB_STATUS_DEVICE_NOT_RESPONDING, ///< Device does not respond |
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112 | OWB_STATUS_CRC_FAILED, ///< CRC error |
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113 | OWB_STATUS_TOO_MANY_BITS, ///< Too many bits |
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114 | OWB_STATUS_HW_ERROR ///< Hardware error |
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115 | } owb_status; |
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116 | |
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117 | /** NOTE: Driver assumes that (*init) was called prior to any other methods */ |
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118 | struct owb_driver |
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119 | { |
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120 | const char* name; |
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121 | |
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122 | owb_status (*uninitialize)(const OneWireBus * bus); |
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123 | |
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124 | owb_status (*reset)(const OneWireBus * bus, bool *is_present); |
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125 | |
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126 | /** NOTE: The data is shifted out of the low bits, eg. it is written in the order of lsb to msb */ |
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127 | owb_status (*write_bits)(const OneWireBus *bus, uint8_t out, int number_of_bits_to_write); |
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128 | |
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129 | /** NOTE: Data is read into the high bits, eg. each bit read is shifted down before the next bit is read */ |
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130 | owb_status (*read_bits)(const OneWireBus *bus, uint8_t *in, int number_of_bits_to_read); |
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131 | }; |
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132 | |
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133 | #define container_of(ptr, type, member) ({ \ |
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134 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
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135 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
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136 | |
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137 | /** |
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138 | * @brief call to release resources after completing use of the OneWireBus |
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139 | * @param[in] bus Pointer to initialised bus instance. |
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140 | * @return status |
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141 | */ |
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142 | owb_status owb_uninitialize(OneWireBus * bus); |
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143 | |
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144 | /** |
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145 | * @brief Enable or disable use of CRC checks on device communications. |
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146 | * @param[in] bus Pointer to initialised bus instance. |
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147 | * @param[in] use_crc True to enable CRC checks, false to disable. |
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148 | * @return status |
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149 | */ |
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150 | owb_status owb_use_crc(OneWireBus * bus, bool use_crc); |
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151 | |
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152 | /** |
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153 | * @brief Read ROM code from device - only works when there is a single device on the bus. |
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154 | * @param[in] bus Pointer to initialised bus instance. |
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155 | * @param[out] rom_code the value read from the device's rom |
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156 | * @return status |
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157 | */ |
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158 | owb_status owb_read_rom(const OneWireBus * bus, OneWireBus_ROMCode *rom_code); |
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159 | |
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160 | /** |
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161 | * @brief Verify the device specified by ROM code is present. |
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162 | * @param[in] bus Pointer to initialised bus instance. |
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163 | * @param[in] rom_code ROM code to verify. |
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164 | * @param[out] is_present set to true if a device is present, false if not |
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165 | * @return status |
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166 | */ |
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167 | owb_status owb_verify_rom(const OneWireBus * bus, OneWireBus_ROMCode rom_code, bool* is_present); |
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168 | |
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169 | /** |
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170 | * @brief Reset the 1-Wire bus. |
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171 | * @param[in] bus Pointer to initialised bus instance. |
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172 | * @param[out] a_device_present set to true if at least one device is present on the bus |
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173 | * @return status |
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174 | */ |
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175 | owb_status owb_reset(const OneWireBus * bus, bool* a_device_present); |
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176 | |
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177 | /** |
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178 | * @brief Write a single byte to the 1-Wire bus. |
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179 | * @param[in] bus Pointer to initialised bus instance. |
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180 | * @param[in] data Byte value to write to bus. |
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181 | * @return status |
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182 | */ |
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183 | owb_status owb_write_byte(const OneWireBus * bus, uint8_t data); |
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184 | |
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185 | /** |
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186 | * @brief Read a single byte from the 1-Wire bus. |
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187 | * @param[in] bus Pointer to initialised bus instance. |
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188 | * @param[out] out The byte value read from the bus. |
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189 | * @return status |
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190 | */ |
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191 | owb_status owb_read_byte(const OneWireBus * bus, uint8_t *out); |
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192 | |
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193 | /** |
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194 | * @brief Read a number of bytes from the 1-Wire bus. |
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195 | * @param[in] bus Pointer to initialised bus instance. |
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196 | * @param[in, out] buffer Pointer to buffer to receive read data. |
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197 | * @param[in] len Number of bytes to read, must not exceed length of receive buffer. |
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198 | * @return status. |
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199 | */ |
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200 | owb_status owb_read_bytes(const OneWireBus * bus, uint8_t * buffer, size_t len); |
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201 | |
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202 | /** |
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203 | * @brief Write a number of bytes to the 1-Wire bus. |
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204 | * @param[in] bus Pointer to initialised bus instance. |
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205 | * @param[in] buffer Pointer to buffer to write data from. |
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206 | * @param[in] len Number of bytes to write. |
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207 | * @return status |
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208 | */ |
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209 | owb_status owb_write_bytes(const OneWireBus * bus, const uint8_t * buffer, size_t len); |
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210 | |
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211 | /** |
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212 | * @brief Write a ROM code to the 1-Wire bus ensuring LSB is sent first. |
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213 | * @param[in] bus Pointer to initialised bus instance. |
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214 | * @param[in] rom_code ROM code to write to bus. |
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215 | * @return status |
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216 | */ |
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217 | owb_status owb_write_rom_code(const OneWireBus * bus, OneWireBus_ROMCode rom_code); |
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218 | |
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219 | /** |
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220 | * @brief 1-Wire 8-bit CRC lookup. |
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221 | * @param[in] crc Starting CRC value. Pass in prior CRC to accumulate. |
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222 | * @param[in] data Byte to feed into CRC. |
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223 | * @return Resultant CRC value. |
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224 | * Should be zero if last byte was the CRC byte and the CRC matches. |
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225 | */ |
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226 | uint8_t owb_crc8_byte(uint8_t crc, uint8_t data); |
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227 | |
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228 | /** |
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229 | * @brief 1-Wire 8-bit CRC lookup with accumulation over a block of bytes. |
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230 | * @param[in] crc Starting CRC value. Pass in prior CRC to accumulate. |
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231 | * @param[in] data Array of bytes to feed into CRC. |
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232 | * @param[in] len Length of data array in bytes. |
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233 | * @return Resultant CRC value. |
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234 | * Should be zero if last byte was the CRC byte and the CRC matches. |
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235 | */ |
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236 | uint8_t owb_crc8_bytes(uint8_t crc, const uint8_t * data, size_t len); |
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237 | |
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238 | /** |
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239 | * @brief Locates the first device on the 1-Wire bus, if present. |
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240 | * @param[in] bus Pointer to initialised bus instance. |
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241 | * @param[in,out] state Pointer to an existing search state structure. |
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242 | * @param[out] found_device True if a device is found, false if no devices are found. |
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243 | * If a device is found, the ROM Code can be obtained from the state. |
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244 | * @return status |
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245 | */ |
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246 | owb_status owb_search_first(const OneWireBus * bus, OneWireBus_SearchState * state, bool *found_device); |
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247 | |
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248 | /** |
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249 | * @brief Locates the next device on the 1-Wire bus, if present, starting from |
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250 | * the provided state. Further calls will yield additional devices, if present. |
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251 | * @param[in] bus Pointer to initialised bus instance. |
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252 | * @param[in,out] state Pointer to an existing search state structure. |
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253 | * @param[out] found_device True if a device is found, false if no devices are found. |
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254 | * If a device is found, the ROM Code can be obtained from the state. |
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255 | * @return status |
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256 | */ |
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257 | owb_status owb_search_next(const OneWireBus * bus, OneWireBus_SearchState * state, bool *found_device); |
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258 | |
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259 | /** |
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260 | * @brief Create a string representation of a ROM code, most significant byte (CRC8) first. |
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261 | * @param[in] rom_code The ROM code to convert to string representation. |
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262 | * @param[out] buffer The destination for the string representation. It will be null terminated. |
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263 | * @param[in] len The length of the buffer in bytes. 64-bit ROM codes require 16 characters |
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264 | * to represent as a string, plus a null terminator, for 17 bytes. |
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265 | * See OWB_ROM_CODE_STRING_LENGTH. |
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266 | * @return pointer to the byte beyond the last byte written |
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267 | */ |
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268 | char * owb_string_from_rom_code(OneWireBus_ROMCode rom_code, char * buffer, size_t len); |
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269 | |
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270 | #include "owb_gpio.h" |
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271 | #include "owb_rmt.h" |
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272 | |
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273 | #ifdef __cplusplus |
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274 | } |
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275 | #endif |
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276 | |
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277 | #endif // ONE_WIRE_BUS_H |