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| 1 | +/* |
| 2 | + * This file is part of the MicroPython project, http://micropython.org/ |
| 3 | + * |
| 4 | + * The MIT License (MIT) |
| 5 | + * |
| 6 | + * Copyright (c) 2017 Nick Moore |
| 7 | + * |
| 8 | + * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | + * of this software and associated documentation files (the "Software"), to deal |
| 10 | + * in the Software without restriction, including without limitation the rights |
| 11 | + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | + * copies of the Software, and to permit persons to whom the Software is |
| 13 | + * furnished to do so, subject to the following conditions: |
| 14 | + * |
| 15 | + * The above copyright notice and this permission notice shall be included in |
| 16 | + * all copies or substantial portions of the Software. |
| 17 | + * |
| 18 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 21 | + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 24 | + * THE SOFTWARE. |
| 25 | + */ |
| 26 | + |
| 27 | + |
| 28 | +#include <stdio.h> |
| 29 | +#include <stdint.h> |
| 30 | +#include <string.h> |
| 31 | + |
| 32 | +#include "esp_log.h" |
| 33 | +#include "esp_now.h" |
| 34 | +#include "esp_wifi.h" |
| 35 | + |
| 36 | +#include "py/runtime.h" |
| 37 | +#include "py/mphal.h" |
| 38 | +#include "py/nlr.h" |
| 39 | +#include "py/objlist.h" |
| 40 | +#include "py/runtime.h" |
| 41 | +#include "py/mphal.h" |
| 42 | +#include "py/mperrno.h" |
| 43 | + |
| 44 | +#include "modnetwork.h" |
| 45 | + |
| 46 | +NORETURN void _esp_espnow_exceptions(esp_err_t e) { |
| 47 | + switch (e) { |
| 48 | + case ESP_ERR_ESPNOW_NOT_INIT: |
| 49 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Not Initialized"); |
| 50 | + case ESP_ERR_ESPNOW_ARG: |
| 51 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Invalid Argument"); |
| 52 | + case ESP_ERR_ESPNOW_NO_MEM: |
| 53 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Out Of Mem"); |
| 54 | + case ESP_ERR_ESPNOW_FULL: |
| 55 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Peer List Full"); |
| 56 | + case ESP_ERR_ESPNOW_NOT_FOUND: |
| 57 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Peer Not Found"); |
| 58 | + case ESP_ERR_ESPNOW_INTERNAL: |
| 59 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Internal"); |
| 60 | + case ESP_ERR_ESPNOW_EXIST: |
| 61 | + mp_raise_msg(&mp_type_OSError, "ESP-Now Peer Exists"); |
| 62 | + default: |
| 63 | + nlr_raise(mp_obj_new_exception_msg_varg( |
| 64 | + &mp_type_RuntimeError, "ESP-Now Unknown Error 0x%04x", e |
| 65 | + )); |
| 66 | + } |
| 67 | +} |
| 68 | + |
| 69 | +static inline void esp_espnow_exceptions(esp_err_t e) { |
| 70 | + if (e != ESP_OK) _esp_espnow_exceptions(e); |
| 71 | +} |
| 72 | + |
| 73 | +static inline void _get_bytes(mp_obj_t str, size_t len, uint8_t *dst) { |
| 74 | + size_t str_len; |
| 75 | + const char *data = mp_obj_str_get_data(str, &str_len); |
| 76 | + if (str_len != len) mp_raise_ValueError("bad len"); |
| 77 | + memcpy(dst, data, len); |
| 78 | +} |
| 79 | + |
| 80 | +// this is crap of course but lets try it |
| 81 | + |
| 82 | +static int recv_buf_len = 0; |
| 83 | +uint8_t recv_mac[6]; |
| 84 | +static uint8_t recv_buffer[250]; |
| 85 | + |
| 86 | +STATIC mp_obj_t espnow_recv() { |
| 87 | + if (recv_buf_len < 1) return mp_const_none; |
| 88 | + mp_obj_tuple_t *msg = mp_obj_new_tuple(2, NULL); |
| 89 | + msg->items[0] = mp_obj_new_bytes(recv_mac, sizeof(recv_mac)); |
| 90 | + msg->items[1] = mp_obj_new_bytes(recv_buffer, recv_buf_len); |
| 91 | + recv_buf_len = 0; |
| 92 | + return msg; |
| 93 | +} |
| 94 | + |
| 95 | +MP_DEFINE_CONST_FUN_OBJ_0(espnow_recv_obj, espnow_recv); |
| 96 | + |
| 97 | +void simple_cb(const uint8_t *macaddr, const uint8_t *data, int len) |
| 98 | +{ |
| 99 | + if (len < sizeof(recv_buffer)) { |
| 100 | + memcpy(recv_buffer, data, len); |
| 101 | + memcpy(recv_mac, macaddr, 6); |
| 102 | + recv_buf_len = len; |
| 103 | + } |
| 104 | +} |
| 105 | + |
| 106 | +static int initialized = 0; |
| 107 | + |
| 108 | +STATIC mp_obj_t espnow_init() { |
| 109 | + if (!initialized) { |
| 110 | + esp_now_init(); |
| 111 | + initialized = 1; |
| 112 | + esp_now_register_recv_cb(simple_cb); |
| 113 | + } |
| 114 | + return mp_const_none; |
| 115 | +} |
| 116 | +MP_DEFINE_CONST_FUN_OBJ_0(espnow_init_obj, espnow_init); |
| 117 | + |
| 118 | +STATIC mp_obj_t espnow_deinit() { |
| 119 | + if (initialized) { |
| 120 | + esp_now_deinit(); |
| 121 | + initialized = 0; |
| 122 | + } |
| 123 | + return mp_const_none; |
| 124 | +} |
| 125 | +MP_DEFINE_CONST_FUN_OBJ_0(espnow_deinit_obj, espnow_deinit); |
| 126 | + |
| 127 | +STATIC mp_obj_t espnow_set_pmk(mp_obj_t pmk) { |
| 128 | + uint8_t buf[ESP_NOW_ETH_ALEN]; |
| 129 | + _get_bytes(pmk, ESP_NOW_ETH_ALEN, buf); |
| 130 | + esp_espnow_exceptions(esp_now_set_pmk(buf)); |
| 131 | + return mp_const_none; |
| 132 | +} |
| 133 | +MP_DEFINE_CONST_FUN_OBJ_1(espnow_set_pmk_obj, espnow_set_pmk); |
| 134 | + |
| 135 | +STATIC mp_obj_t espnow_add_peer(size_t n_args, const mp_obj_t *args) { |
| 136 | + esp_now_peer_info_t peer = {0}; |
| 137 | + peer.ifidx = ((wlan_if_obj_t *)MP_OBJ_TO_PTR(args[0]))->if_id; |
| 138 | + _get_bytes(args[1], ESP_NOW_ETH_ALEN, peer.peer_addr); |
| 139 | + _get_bytes(args[2], ESP_NOW_KEY_LEN, peer.lmk); |
| 140 | + peer.encrypt = (n_args > 3 && mp_obj_is_true(args[3])) ? 1 : 0; |
| 141 | + // leaving channel as 0 for autodetect |
| 142 | + esp_espnow_exceptions(esp_now_add_peer(&peer)); |
| 143 | + return mp_const_none; |
| 144 | +} |
| 145 | +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(espnow_add_peer_obj, 3, 4, espnow_add_peer); |
| 146 | + |
| 147 | +STATIC mp_obj_t espnow_send(mp_obj_t addr, mp_obj_t msg) { |
| 148 | + mp_uint_t len1; |
| 149 | + const uint8_t *buf1 = (const uint8_t *)mp_obj_str_get_data(addr, &len1); |
| 150 | + mp_uint_t len2; |
| 151 | + const uint8_t *buf2 = (const uint8_t *)mp_obj_str_get_data(msg, &len2); |
| 152 | + if (len1 != ESP_NOW_ETH_ALEN) mp_raise_ValueError("addr invalid"); |
| 153 | + if (len2 > ESP_NOW_MAX_DATA_LEN) mp_raise_ValueError("Msg too long"); |
| 154 | + esp_espnow_exceptions(esp_now_send(buf1, buf2, len2)); |
| 155 | + return mp_const_none; |
| 156 | +} |
| 157 | +MP_DEFINE_CONST_FUN_OBJ_2(espnow_send_obj, espnow_send); |
| 158 | + |
| 159 | +STATIC mp_obj_t espnow_send_all(mp_obj_t msg) { |
| 160 | + mp_uint_t len; |
| 161 | + const uint8_t *buf = (const uint8_t *)mp_obj_str_get_data(msg, &len); |
| 162 | + if (len > ESP_NOW_MAX_DATA_LEN) mp_raise_ValueError("Msg too long"); |
| 163 | + esp_espnow_exceptions(esp_now_send(NULL, buf, len)); |
| 164 | + return mp_const_none; |
| 165 | +} |
| 166 | +MP_DEFINE_CONST_FUN_OBJ_1(espnow_send_all_obj, espnow_send_all); |
| 167 | + |
| 168 | +STATIC const mp_rom_map_elem_t espnow_globals_dict_table[] = { |
| 169 | + { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&espnow_init_obj) }, |
| 170 | + { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&espnow_deinit_obj) }, |
| 171 | + { MP_ROM_QSTR(MP_QSTR_set_pmk), MP_ROM_PTR(&espnow_set_pmk_obj) }, |
| 172 | + { MP_ROM_QSTR(MP_QSTR_add_peer), MP_ROM_PTR(&espnow_add_peer_obj) }, |
| 173 | + { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&espnow_send_obj) }, |
| 174 | + { MP_ROM_QSTR(MP_QSTR_send_all), MP_ROM_PTR(&espnow_send_all_obj) }, |
| 175 | + { MP_ROM_QSTR(MP_QSTR_recv), MP_ROM_PTR(&espnow_recv_obj) }, |
| 176 | +}; |
| 177 | +STATIC MP_DEFINE_CONST_DICT(espnow_globals_dict, espnow_globals_dict_table); |
| 178 | + |
| 179 | +const mp_obj_module_t mp_module_esp_espnow = { |
| 180 | + .base = { &mp_type_module }, |
| 181 | + .globals = (mp_obj_dict_t *)&espnow_globals_dict, |
| 182 | +}; |
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