115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Dan Halbert for Adafruit Industries
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* Copyright (c) 2018 Artur Pacholec
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* Copyright (c) 2017 Glenn Ruben Bakke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "shared/runtime/interrupt_char.h"
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#include "py/gc.h"
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#include "py/objstr.h"
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#include "py/runtime.h"
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#include "common-hal/wifi/__init__.h"
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#include "shared-bindings/wifi/__init__.h"
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#include "shared-bindings/wifi/Network.h"
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#include "shared-bindings/wifi/Radio.h"
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#include "shared-bindings/wifi/ScannedNetworks.h"
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#define NUM_SCAN (16)
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static cyw43_ev_scan_result_t scan_results[NUM_SCAN];
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static uint8_t scan_put, scan_get;
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static bool scan_full;
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static void scan_result_put(const cyw43_ev_scan_result_t *result) {
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if (!scan_full) {
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scan_results[scan_put] = *result;
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scan_put = (scan_put + 1) % NUM_SCAN;
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scan_full = (scan_put == scan_get);
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}
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}
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static bool scan_result_available(void) {
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return scan_full || (scan_get != scan_put);
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}
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static cyw43_ev_scan_result_t *scan_result_get(cyw43_ev_scan_result_t *result) {
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if (!scan_result_available()) {
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return NULL;
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}
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*result = scan_results[scan_get];
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scan_get = (scan_get + 1) % NUM_SCAN;
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scan_full = false;
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return result;
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}
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// Note: It's not OK to allocate memory in here, we can be called at a bad time
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// which messes up the gc allocator
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static int scan_result(void *env, const cyw43_ev_scan_result_t *result) {
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wifi_scannednetworks_obj_t *self = common_hal_wifi_radio_obj.current_scan;
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// scan ended or something
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if (!self) {
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return 0;
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}
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scan_result_put(result);
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return 0;
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}
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mp_obj_t common_hal_wifi_scannednetworks_next(wifi_scannednetworks_obj_t *self) {
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// no results available, wait for some
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while (!scan_result_available() && cyw43_wifi_scan_active(&cyw43_state)) {
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RUN_BACKGROUND_TASKS;
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if (mp_hal_is_interrupted()) {
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return mp_const_none;
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}
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cyw43_arch_poll();
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}
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if (!scan_result_available()) {
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common_hal_wifi_radio_obj.current_scan = NULL;
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return mp_const_none;
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}
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wifi_network_obj_t *entry = mp_obj_malloc(wifi_network_obj_t, &wifi_network_type);
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scan_result_get(&entry->record);
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return MP_OBJ_FROM_PTR(entry);
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}
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void wifi_scannednetworks_deinit(wifi_scannednetworks_obj_t *self) {
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// there's actually no way to stop an ongoing scan in cyw43!
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common_hal_wifi_radio_obj.current_scan = NULL;
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}
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void wifi_scannednetworks_start_scan(wifi_scannednetworks_obj_t *self) {
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cyw43_wifi_scan_options_t scan_options = {0};
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CHECK_CYW_RESULT(cyw43_wifi_scan(&cyw43_state, &scan_options, NULL, scan_result));
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}
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