Tue, 26 Sep 2023 14:57:18 +0200
Migrated to isp-idf v5.1
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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 | */ |
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29 | |
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30 | #include <stddef.h> |
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31 | #include <stdbool.h> |
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32 | #include <inttypes.h> |
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33 | #include <string.h> |
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34 | #include <stdlib.h> |
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35 | |
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36 | #include "freertos/FreeRTOS.h" |
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37 | #include "freertos/task.h" |
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38 | #include "esp_log.h" |
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39 | #include "sdkconfig.h" |
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40 | #include "driver/gpio.h" |
72 | 41 | #include "rom/gpio.h" // for gpio_pad_select_gpio() |
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42 | |
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43 | #include "owb.h" |
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44 | #include "owb_gpio.h" |
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45 | |
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46 | static const char * TAG = "owb"; |
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47 | |
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48 | static bool _is_init(const OneWireBus * bus) |
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49 | { |
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50 | bool ok = false; |
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51 | if (bus != NULL) |
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52 | { |
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53 | if (bus->driver) |
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54 | { |
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55 | // OK |
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56 | ok = true; |
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57 | } |
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58 | else |
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59 | { |
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60 | ESP_LOGE(TAG, "bus is not initialised"); |
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61 | } |
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62 | } |
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63 | else |
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64 | { |
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65 | ESP_LOGE(TAG, "bus is NULL"); |
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66 | } |
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67 | return ok; |
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68 | } |
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69 | |
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70 | /** |
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71 | * @brief 1-Wire 8-bit CRC lookup. |
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72 | * @param[in] crc Starting CRC value. Pass in prior CRC to accumulate. |
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73 | * @param[in] data Byte to feed into CRC. |
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74 | * @return Resultant CRC value. |
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75 | */ |
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76 | static uint8_t _calc_crc(uint8_t crc, uint8_t data) |
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77 | { |
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78 | // https://www.maximintegrated.com/en/app-notes/index.mvp/id/27 |
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79 | static const uint8_t table[256] = { |
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80 | 0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65, |
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81 | 157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220, |
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82 | 35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98, |
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83 | 190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255, |
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84 | 70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7, |
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85 | 219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154, |
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86 | 101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36, |
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87 | 248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185, |
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88 | 140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205, |
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89 | 17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80, |
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90 | 175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238, |
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91 | 50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115, |
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92 | 202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139, |
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93 | 87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22, |
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94 | 233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168, |
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95 | 116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53 |
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96 | }; |
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97 | |
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98 | return table[crc ^ data]; |
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99 | } |
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100 | |
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101 | static uint8_t _calc_crc_block(uint8_t crc, const uint8_t * buffer, size_t len) |
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102 | { |
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103 | do |
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104 | { |
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105 | crc = _calc_crc(crc, *buffer++); |
72 | 106 | ESP_LOGD(TAG, "buffer 0x%02x, crc 0x%02x, len %d", (uint8_t)*(buffer - 1), (int)crc, (int)len); |
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107 | } |
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108 | while (--len > 0); |
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109 | return crc; |
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110 | } |
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111 | |
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112 | /** |
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113 | * @param[out] is_found true if a device was found, false if not |
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114 | * @return status |
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115 | */ |
72 | 116 | static owb_status _search(const OneWireBus * bus, OneWireBus_SearchState * state, bool * is_found) |
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117 | { |
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118 | // Based on https://www.maximintegrated.com/en/app-notes/index.mvp/id/187 |
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119 | |
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120 | // initialize for search |
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121 | int id_bit_number = 1; |
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122 | int last_zero = 0; |
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123 | int rom_byte_number = 0; |
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124 | uint8_t id_bit = 0; |
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125 | uint8_t cmp_id_bit = 0; |
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126 | uint8_t rom_byte_mask = 1; |
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127 | uint8_t search_direction = 0; |
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128 | bool search_result = false; |
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129 | uint8_t crc8 = 0; |
72 | 130 | owb_status status = OWB_STATUS_NOT_SET; |
0
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131 | |
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132 | // if the last call was not the last one |
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133 | if (!state->last_device_flag) |
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Initial import of the CO2 meter application.
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134 | { |
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Initial import of the CO2 meter application.
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135 | // 1-Wire reset |
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136 | bool is_present; |
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137 | bus->driver->reset(bus, &is_present); |
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Initial import of the CO2 meter application.
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138 | if (!is_present) |
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139 | { |
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140 | // reset the search |
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Initial import of the CO2 meter application.
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141 | state->last_discrepancy = 0; |
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Initial import of the CO2 meter application.
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142 | state->last_device_flag = false; |
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Initial import of the CO2 meter application.
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143 | state->last_family_discrepancy = 0; |
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144 | *is_found = false; |
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145 | return OWB_STATUS_OK; |
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Initial import of the CO2 meter application.
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146 | } |
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Initial import of the CO2 meter application.
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147 | |
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148 | // issue the search command |
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149 | bus->driver->write_bits(bus, OWB_ROM_SEARCH, 8); |
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Initial import of the CO2 meter application.
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150 | |
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Initial import of the CO2 meter application.
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151 | // loop to do the search |
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152 | do |
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Initial import of the CO2 meter application.
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153 | { |
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154 | id_bit = cmp_id_bit = 0; |
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Initial import of the CO2 meter application.
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155 | |
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Initial import of the CO2 meter application.
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156 | // read a bit and its complement |
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157 | bus->driver->read_bits(bus, &id_bit, 1); |
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Initial import of the CO2 meter application.
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158 | bus->driver->read_bits(bus, &cmp_id_bit, 1); |
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Initial import of the CO2 meter application.
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159 | |
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Initial import of the CO2 meter application.
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160 | // check for no devices on 1-wire (signal level is high in both bit reads) |
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Initial import of the CO2 meter application.
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161 | if (id_bit && cmp_id_bit) |
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Initial import of the CO2 meter application.
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162 | { |
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163 | break; |
72 | 164 | } |
165 | else | |
0
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Initial import of the CO2 meter application.
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166 | { |
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167 | // all devices coupled have 0 or 1 |
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168 | if (id_bit != cmp_id_bit) |
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169 | { |
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170 | search_direction = (id_bit) ? 1 : 0; // bit write value for search |
72 | 171 | } |
172 | else | |
0
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173 | { |
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174 | // if this discrepancy if before the Last Discrepancy |
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175 | // on a previous next then pick the same as last time |
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176 | if (id_bit_number < state->last_discrepancy) |
72 | 177 | { |
0
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178 | search_direction = ((state->rom_code.bytes[rom_byte_number] & rom_byte_mask) > 0); |
72 | 179 | } |
0
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180 | else |
72 | 181 | { |
0
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182 | // if equal to last pick 1, if not then pick 0 |
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183 | search_direction = (id_bit_number == state->last_discrepancy); |
72 | 184 | } |
0
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185 | |
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Initial import of the CO2 meter application.
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186 | // if 0 was picked then record its position in LastZero |
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187 | if (search_direction == 0) |
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188 | { |
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189 | last_zero = id_bit_number; |
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190 | |
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191 | // check for Last discrepancy in family |
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192 | if (last_zero < 9) |
72 | 193 | { |
0
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194 | state->last_family_discrepancy = last_zero; |
72 | 195 | } |
0
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196 | } |
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Initial import of the CO2 meter application.
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197 | } |
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198 | |
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199 | // set or clear the bit in the ROM byte rom_byte_number |
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Initial import of the CO2 meter application.
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200 | // with mask rom_byte_mask |
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201 | if (search_direction == 1) |
72 | 202 | { |
0
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Initial import of the CO2 meter application.
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203 | state->rom_code.bytes[rom_byte_number] |= rom_byte_mask; |
72 | 204 | } |
0
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Initial import of the CO2 meter application.
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205 | else |
72 | 206 | { |
0
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Initial import of the CO2 meter application.
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207 | state->rom_code.bytes[rom_byte_number] &= ~rom_byte_mask; |
72 | 208 | } |
0
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Initial import of the CO2 meter application.
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209 | |
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Initial import of the CO2 meter application.
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210 | // serial number search direction write bit |
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Initial import of the CO2 meter application.
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211 | bus->driver->write_bits(bus, search_direction, 1); |
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Initial import of the CO2 meter application.
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212 | |
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213 | // increment the byte counter id_bit_number |
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214 | // and shift the mask rom_byte_mask |
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Initial import of the CO2 meter application.
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215 | id_bit_number++; |
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216 | rom_byte_mask <<= 1; |
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Initial import of the CO2 meter application.
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217 | |
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218 | // if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask |
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Initial import of the CO2 meter application.
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219 | if (rom_byte_mask == 0) |
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Initial import of the CO2 meter application.
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220 | { |
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221 | crc8 = owb_crc8_byte(crc8, state->rom_code.bytes[rom_byte_number]); // accumulate the CRC |
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222 | rom_byte_number++; |
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223 | rom_byte_mask = 1; |
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224 | } |
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Initial import of the CO2 meter application.
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225 | } |
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226 | } |
72 | 227 | while (rom_byte_number < 8); // loop until through all ROM bytes 0-7 |
0
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228 | |
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229 | // if the search was successful then |
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230 | if (!((id_bit_number < 65) || (crc8 != 0))) |
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Initial import of the CO2 meter application.
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231 | { |
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232 | // search successful so set LastDiscrepancy,LastDeviceFlag,search_result |
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Initial import of the CO2 meter application.
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233 | state->last_discrepancy = last_zero; |
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Initial import of the CO2 meter application.
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234 | |
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Initial import of the CO2 meter application.
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235 | // check for last device |
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236 | if (state->last_discrepancy == 0) |
72 | 237 | { |
0
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Initial import of the CO2 meter application.
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parents:
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238 | state->last_device_flag = true; |
72 | 239 | } |
0
88d965579617
Initial import of the CO2 meter application.
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parents:
diff
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|
240 | |
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Initial import of the CO2 meter application.
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parents:
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241 | search_result = true; |
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Initial import of the CO2 meter application.
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242 | } |
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Initial import of the CO2 meter application.
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243 | } |
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Initial import of the CO2 meter application.
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244 | |
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Initial import of the CO2 meter application.
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245 | // if no device found then reset counters so next 'search' will be like a first |
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Initial import of the CO2 meter application.
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parents:
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246 | if (!search_result || !state->rom_code.bytes[0]) |
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Initial import of the CO2 meter application.
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247 | { |
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Initial import of the CO2 meter application.
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248 | state->last_discrepancy = 0; |
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Initial import of the CO2 meter application.
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249 | state->last_device_flag = false; |
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Initial import of the CO2 meter application.
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250 | state->last_family_discrepancy = 0; |
88d965579617
Initial import of the CO2 meter application.
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251 | search_result = false; |
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Initial import of the CO2 meter application.
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|
252 | } |
88d965579617
Initial import of the CO2 meter application.
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253 | |
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Initial import of the CO2 meter application.
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254 | status = OWB_STATUS_OK; |
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Initial import of the CO2 meter application.
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255 | |
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Initial import of the CO2 meter application.
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256 | *is_found = search_result; |
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Initial import of the CO2 meter application.
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257 | |
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Initial import of the CO2 meter application.
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258 | return status; |
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Initial import of the CO2 meter application.
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259 | } |
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Initial import of the CO2 meter application.
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260 | |
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Initial import of the CO2 meter application.
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parents:
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261 | // Public API |
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Initial import of the CO2 meter application.
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262 | |
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Initial import of the CO2 meter application.
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263 | owb_status owb_uninitialize(OneWireBus * bus) |
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Initial import of the CO2 meter application.
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parents:
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264 | { |
72 | 265 | owb_status status = OWB_STATUS_NOT_SET; |
0
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Initial import of the CO2 meter application.
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parents:
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266 | |
72 | 267 | if (!_is_init(bus)) |
0
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Initial import of the CO2 meter application.
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268 | { |
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Initial import of the CO2 meter application.
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269 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 270 | } |
271 | else | |
0
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Initial import of the CO2 meter application.
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272 | { |
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Initial import of the CO2 meter application.
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273 | bus->driver->uninitialize(bus); |
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Initial import of the CO2 meter application.
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274 | status = OWB_STATUS_OK; |
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Initial import of the CO2 meter application.
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275 | } |
88d965579617
Initial import of the CO2 meter application.
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parents:
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276 | |
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Initial import of the CO2 meter application.
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277 | return status; |
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Initial import of the CO2 meter application.
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278 | } |
88d965579617
Initial import of the CO2 meter application.
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parents:
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|
279 | |
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280 | owb_status owb_use_crc(OneWireBus * bus, bool use_crc) |
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281 | { |
72 | 282 | owb_status status = OWB_STATUS_NOT_SET; |
0
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283 | |
72 | 284 | if (!bus) |
0
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285 | { |
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286 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 287 | } |
288 | else if (!_is_init(bus)) | |
0
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289 | { |
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290 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 291 | } |
292 | else | |
0
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293 | { |
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294 | bus->use_crc = use_crc; |
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295 | ESP_LOGD(TAG, "use_crc %d", bus->use_crc); |
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296 | |
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297 | status = OWB_STATUS_OK; |
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298 | } |
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299 | |
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300 | return status; |
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301 | } |
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302 | |
72 | 303 | owb_status owb_use_parasitic_power(OneWireBus * bus, bool use_parasitic_power) |
304 | { | |
305 | owb_status status = OWB_STATUS_NOT_SET; | |
306 | ||
307 | if (!bus) | |
308 | { | |
309 | status = OWB_STATUS_PARAMETER_NULL; | |
310 | } | |
311 | else if (!_is_init(bus)) | |
312 | { | |
313 | status = OWB_STATUS_NOT_INITIALIZED; | |
314 | } | |
315 | else | |
316 | { | |
317 | bus->use_parasitic_power = use_parasitic_power; | |
318 | ESP_LOGD(TAG, "use_parasitic_power %d", bus->use_parasitic_power); | |
319 | ||
320 | status = OWB_STATUS_OK; | |
321 | } | |
322 | ||
323 | return status; | |
324 | } | |
325 | ||
326 | owb_status owb_use_strong_pullup_gpio(OneWireBus * bus, gpio_num_t gpio) | |
327 | { | |
328 | owb_status status = OWB_STATUS_NOT_SET; | |
329 | ||
330 | if (!bus) | |
331 | { | |
332 | status = OWB_STATUS_PARAMETER_NULL; | |
333 | } | |
334 | else if (!_is_init(bus)) | |
335 | { | |
336 | status = OWB_STATUS_NOT_INITIALIZED; | |
337 | } | |
338 | else | |
339 | { | |
340 | if (gpio != GPIO_NUM_NC) { | |
341 | // The strong GPIO pull-up is only activated if parasitic-power mode is enabled | |
342 | if (!bus->use_parasitic_power) { | |
343 | ESP_LOGW(TAG, "Strong pull-up GPIO set with parasitic-power disabled"); | |
344 | } | |
345 | ||
346 | gpio_pad_select_gpio(gpio); | |
347 | gpio_set_direction(gpio, GPIO_MODE_OUTPUT); | |
348 | } | |
349 | else | |
350 | { | |
351 | gpio_reset_pin(bus->strong_pullup_gpio); | |
352 | } | |
353 | ||
354 | bus->strong_pullup_gpio = gpio; | |
355 | ESP_LOGD(TAG, "use_strong_pullup_gpio %d", bus->strong_pullup_gpio); | |
356 | ||
357 | status = OWB_STATUS_OK; | |
358 | } | |
359 | ||
360 | return status; | |
361 | } | |
362 | ||
0
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363 | owb_status owb_read_rom(const OneWireBus * bus, OneWireBus_ROMCode *rom_code) |
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364 | { |
72 | 365 | owb_status status = OWB_STATUS_NOT_SET; |
0
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366 | |
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367 | memset(rom_code, 0, sizeof(OneWireBus_ROMCode)); |
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368 | |
72 | 369 | if (!bus || !rom_code) |
0
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370 | { |
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371 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 372 | } |
373 | else if (!_is_init(bus)) | |
0
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374 | { |
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375 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 376 | } |
377 | else | |
0
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378 | { |
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379 | bool is_present; |
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380 | bus->driver->reset(bus, &is_present); |
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381 | if (is_present) |
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382 | { |
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383 | uint8_t value = OWB_ROM_READ; |
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384 | bus->driver->write_bits(bus, value, 8); |
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385 | owb_read_bytes(bus, rom_code->bytes, sizeof(OneWireBus_ROMCode)); |
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386 | |
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387 | if (bus->use_crc) |
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388 | { |
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389 | if (owb_crc8_bytes(0, rom_code->bytes, sizeof(OneWireBus_ROMCode)) != 0) |
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390 | { |
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391 | ESP_LOGE(TAG, "CRC failed"); |
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392 | memset(rom_code->bytes, 0, sizeof(OneWireBus_ROMCode)); |
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393 | status = OWB_STATUS_CRC_FAILED; |
72 | 394 | } |
395 | else | |
0
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396 | { |
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397 | status = OWB_STATUS_OK; |
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398 | } |
72 | 399 | } |
400 | else | |
0
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401 | { |
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402 | status = OWB_STATUS_OK; |
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403 | } |
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404 | char rom_code_s[OWB_ROM_CODE_STRING_LENGTH]; |
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405 | owb_string_from_rom_code(*rom_code, rom_code_s, sizeof(rom_code_s)); |
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406 | ESP_LOGD(TAG, "rom_code %s", rom_code_s); |
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407 | } |
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408 | else |
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409 | { |
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410 | status = OWB_STATUS_DEVICE_NOT_RESPONDING; |
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411 | ESP_LOGE(TAG, "ds18b20 device not responding"); |
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412 | } |
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413 | } |
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414 | |
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415 | return status; |
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416 | } |
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417 | |
72 | 418 | owb_status owb_verify_rom(const OneWireBus * bus, OneWireBus_ROMCode rom_code, bool * is_present) |
0
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419 | { |
72 | 420 | owb_status status = OWB_STATUS_NOT_SET; |
0
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421 | bool result = false; |
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422 | |
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423 | if (!bus || !is_present) |
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424 | { |
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Initial import of the CO2 meter application.
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425 | status = OWB_STATUS_PARAMETER_NULL; |
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426 | } |
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Initial import of the CO2 meter application.
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427 | else if (!_is_init(bus)) |
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Initial import of the CO2 meter application.
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parents:
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428 | { |
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Initial import of the CO2 meter application.
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429 | status = OWB_STATUS_NOT_INITIALIZED; |
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430 | } |
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431 | else |
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parents:
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432 | { |
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433 | OneWireBus_SearchState state = { |
72 | 434 | .rom_code = rom_code, |
0
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435 | .last_discrepancy = 64, |
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436 | .last_device_flag = false, |
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437 | }; |
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438 | |
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439 | bool is_found = false; |
72 | 440 | _search(bus, &state, &is_found); |
441 | if (is_found) | |
0
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442 | { |
72 | 443 | result = true; |
444 | for (int i = 0; i < sizeof(state.rom_code.bytes) && result; ++i) | |
0
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445 | { |
72 | 446 | result = rom_code.bytes[i] == state.rom_code.bytes[i]; |
447 | ESP_LOGD(TAG, "%02x %02x", rom_code.bytes[i], state.rom_code.bytes[i]); | |
0
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448 | } |
72 | 449 | is_found = result; |
0
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450 | } |
72 | 451 | ESP_LOGD(TAG, "state.last_discrepancy %d, state.last_device_flag %d, is_found %d", |
452 | state.last_discrepancy, state.last_device_flag, is_found); | |
0
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Initial import of the CO2 meter application.
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parents:
diff
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453 | |
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parents:
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454 | ESP_LOGD(TAG, "rom code %sfound", result ? "" : "not "); |
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455 | *is_present = result; |
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456 | status = OWB_STATUS_OK; |
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457 | } |
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458 | |
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459 | return status; |
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460 | } |
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461 | |
72 | 462 | owb_status owb_reset(const OneWireBus * bus, bool * a_device_present) |
463 | { | |
464 | owb_status status = OWB_STATUS_NOT_SET; | |
465 | ||
466 | if (!bus || !a_device_present) | |
467 | { | |
468 | status = OWB_STATUS_PARAMETER_NULL; | |
469 | } | |
470 | else if(!_is_init(bus)) | |
471 | { | |
472 | status = OWB_STATUS_NOT_INITIALIZED; | |
473 | } | |
474 | else | |
475 | { | |
476 | status = bus->driver->reset(bus, a_device_present); | |
477 | } | |
478 | ||
479 | return status; | |
480 | } | |
481 | ||
482 | owb_status owb_read_bit(const OneWireBus * bus, uint8_t * out) | |
0
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483 | { |
72 | 484 | owb_status status = OWB_STATUS_NOT_SET; |
0
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parents:
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485 | |
72 | 486 | if (!bus || !out) |
487 | { | |
488 | status = OWB_STATUS_PARAMETER_NULL; | |
489 | } | |
490 | else if (!_is_init(bus)) | |
491 | { | |
492 | status = OWB_STATUS_NOT_INITIALIZED; | |
493 | } | |
494 | else | |
495 | { | |
496 | bus->driver->read_bits(bus, out, 1); | |
497 | ESP_LOGD(TAG, "owb_read_bit: %02x", *out); | |
498 | status = OWB_STATUS_OK; | |
499 | } | |
500 | ||
501 | return status; | |
502 | } | |
503 | ||
504 | owb_status owb_read_byte(const OneWireBus * bus, uint8_t * out) | |
505 | { | |
506 | owb_status status = OWB_STATUS_NOT_SET; | |
507 | ||
508 | if (!bus || !out) | |
0
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509 | { |
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parents:
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510 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 511 | } |
512 | else if (!_is_init(bus)) | |
513 | { | |
514 | status = OWB_STATUS_NOT_INITIALIZED; | |
515 | } | |
516 | else | |
517 | { | |
518 | bus->driver->read_bits(bus, out, 8); | |
519 | ESP_LOGD(TAG, "owb_read_byte: %02x", *out); | |
520 | status = OWB_STATUS_OK; | |
521 | } | |
522 | ||
523 | return status; | |
524 | } | |
525 | ||
526 | owb_status owb_read_bytes(const OneWireBus * bus, uint8_t * buffer, unsigned int len) | |
527 | { | |
528 | owb_status status = OWB_STATUS_NOT_SET; | |
529 | ||
530 | if (!bus || !buffer) | |
531 | { | |
532 | status = OWB_STATUS_PARAMETER_NULL; | |
533 | } | |
534 | else if (!_is_init(bus)) | |
0
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Initial import of the CO2 meter application.
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parents:
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535 | { |
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Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
536 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 537 | } |
538 | else | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
539 | { |
72 | 540 | for (int i = 0; i < len; ++i) |
541 | { | |
542 | uint8_t out; | |
543 | bus->driver->read_bits(bus, &out, 8); | |
544 | buffer[i] = out; | |
545 | } | |
546 | ||
547 | ESP_LOGD(TAG, "owb_read_bytes, len %d:", len); | |
548 | ESP_LOG_BUFFER_HEX_LEVEL(TAG, buffer, len, ESP_LOG_DEBUG); | |
549 | ||
550 | status = OWB_STATUS_OK; | |
551 | } | |
552 | ||
553 | return status; | |
554 | } | |
555 | ||
556 | owb_status owb_write_bit(const OneWireBus * bus, const uint8_t bit) | |
557 | { | |
558 | owb_status status = OWB_STATUS_NOT_SET; | |
559 | ||
560 | if (!bus) | |
561 | { | |
562 | status = OWB_STATUS_PARAMETER_NULL; | |
563 | } | |
564 | else if (!_is_init(bus)) | |
565 | { | |
566 | status = OWB_STATUS_NOT_INITIALIZED; | |
567 | } | |
568 | else | |
569 | { | |
570 | ESP_LOGD(TAG, "owb_write_bit: %02x", bit); | |
571 | bus->driver->write_bits(bus, bit & 0x01u, 1); | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
572 | status = OWB_STATUS_OK; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
573 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
574 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
575 | return status; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
576 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
577 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
578 | owb_status owb_write_byte(const OneWireBus * bus, uint8_t data) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
579 | { |
72 | 580 | owb_status status = OWB_STATUS_NOT_SET; |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
581 | |
72 | 582 | if (!bus) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
583 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
584 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 585 | } |
586 | else if (!_is_init(bus)) | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
587 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
588 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 589 | } |
590 | else | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
591 | { |
72 | 592 | ESP_LOGD(TAG, "owb_write_byte: %02x", data); |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
593 | bus->driver->write_bits(bus, data, 8); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
594 | status = OWB_STATUS_OK; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
595 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
596 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
597 | return status; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
598 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
599 | |
72 | 600 | owb_status owb_write_bytes(const OneWireBus * bus, const uint8_t * buffer, size_t len) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
601 | { |
72 | 602 | owb_status status = OWB_STATUS_NOT_SET; |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
603 | |
72 | 604 | if (!bus || !buffer) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
605 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
606 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 607 | } |
608 | else if (!_is_init(bus)) | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
609 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
610 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 611 | } |
612 | else | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
613 | { |
72 | 614 | ESP_LOGD(TAG, "owb_write_bytes, len %d:", len); |
615 | ESP_LOG_BUFFER_HEX_LEVEL(TAG, buffer, len, ESP_LOG_DEBUG); | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
616 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
617 | for (int i = 0; i < len; i++) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
618 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
619 | bus->driver->write_bits(bus, buffer[i], 8); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
620 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
621 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
622 | status = OWB_STATUS_OK; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
623 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
624 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
625 | return status; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
626 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
627 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
628 | owb_status owb_write_rom_code(const OneWireBus * bus, OneWireBus_ROMCode rom_code) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
629 | { |
72 | 630 | owb_status status = OWB_STATUS_NOT_SET; |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
631 | |
72 | 632 | if (!bus) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
633 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
634 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 635 | } |
636 | else if (!_is_init(bus)) | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
637 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
638 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 639 | } |
640 | else | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
641 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
642 | owb_write_bytes(bus, (uint8_t*)&rom_code, sizeof(rom_code)); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
643 | status = OWB_STATUS_OK; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
644 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
645 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
646 | return status; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
647 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
648 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
649 | uint8_t owb_crc8_byte(uint8_t crc, uint8_t data) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
650 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
651 | return _calc_crc(crc, data); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
652 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
653 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
654 | uint8_t owb_crc8_bytes(uint8_t crc, const uint8_t * data, size_t len) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
655 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
656 | return _calc_crc_block(crc, data, len); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
657 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
658 | |
72 | 659 | owb_status owb_search_first(const OneWireBus * bus, OneWireBus_SearchState * state, bool * found_device) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
660 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
661 | bool result; |
72 | 662 | owb_status status = OWB_STATUS_NOT_SET; |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
663 | |
72 | 664 | if (!bus || !state || !found_device) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
665 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
666 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 667 | } |
668 | else if (!_is_init(bus)) | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
669 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
670 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 671 | } |
672 | else | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
673 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
674 | memset(&state->rom_code, 0, sizeof(state->rom_code)); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
675 | state->last_discrepancy = 0; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
676 | state->last_family_discrepancy = 0; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
677 | state->last_device_flag = false; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
678 | _search(bus, state, &result); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
679 | status = OWB_STATUS_OK; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
680 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
681 | *found_device = result; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
682 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
683 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
684 | return status; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
685 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
686 | |
72 | 687 | owb_status owb_search_next(const OneWireBus * bus, OneWireBus_SearchState * state, bool * found_device) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
688 | { |
72 | 689 | owb_status status = OWB_STATUS_NOT_SET; |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
690 | bool result = false; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
691 | |
72 | 692 | if (!bus || !state || !found_device) |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
693 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
694 | status = OWB_STATUS_PARAMETER_NULL; |
72 | 695 | } |
696 | else if (!_is_init(bus)) | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
697 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
698 | status = OWB_STATUS_NOT_INITIALIZED; |
72 | 699 | } |
700 | else | |
0
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
701 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
702 | _search(bus, state, &result); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
703 | status = OWB_STATUS_OK; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
704 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
705 | *found_device = result; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
706 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
707 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
708 | return status; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
709 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
710 | |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
711 | char * owb_string_from_rom_code(OneWireBus_ROMCode rom_code, char * buffer, size_t len) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
712 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
713 | for (int i = sizeof(rom_code.bytes) - 1; i >= 0; i--) |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
714 | { |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
715 | sprintf(buffer, "%02x", rom_code.bytes[i]); |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
716 | buffer += 2; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
717 | } |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
718 | return buffer; |
88d965579617
Initial import of the CO2 meter application.
Michiel Broek <mbroek@mbse.eu>
parents:
diff
changeset
|
719 | } |
72 | 720 | |
721 | owb_status owb_set_strong_pullup(const OneWireBus * bus, bool enable) | |
722 | { | |
723 | owb_status status = OWB_STATUS_NOT_SET; | |
724 | ||
725 | if (!bus) | |
726 | { | |
727 | status = OWB_STATUS_PARAMETER_NULL; | |
728 | } | |
729 | else if (!_is_init(bus)) | |
730 | { | |
731 | status = OWB_STATUS_NOT_INITIALIZED; | |
732 | } | |
733 | else | |
734 | { | |
735 | if (bus->use_parasitic_power && bus->strong_pullup_gpio != GPIO_NUM_NC) | |
736 | { | |
737 | gpio_set_level(bus->strong_pullup_gpio, enable ? 1 : 0); | |
738 | ESP_LOGD(TAG, "strong pullup GPIO %d", enable); | |
739 | } // else ignore | |
740 | ||
741 | status = OWB_STATUS_OK; | |
742 | } | |
743 | ||
744 | return status; | |
745 | } |