mirror of
https://libwebsockets.org/repo/libwebsockets
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121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*
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* Generic GPIO led
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*
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* Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
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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
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "private-lib-core.h"
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#include "drivers/led/private-lib-drivers-led.h"
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#if defined(LWS_PLAT_TIMER_CB)
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static LWS_PLAT_TIMER_CB(lws_led_timer_cb, th)
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{
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lws_led_state_t *lcs = LWS_PLAT_TIMER_CB_GET_OPAQUE(th);
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lws_seq_timer_handle(lcs);
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}
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#endif
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struct lws_led_state *
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lws_led_gpio_create(const lws_led_ops_t *led_ops)
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{
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lws_led_gpio_controller_t *lgc = (lws_led_gpio_controller_t *)led_ops;
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/*
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* We allocate the main state object, and a 3 x seq dynamic footprint
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* for each led, since it may be sequencing the transition between two
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* other sequences.
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*/
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lws_led_state_t *lcs = lws_zalloc(sizeof(lws_led_state_t) +
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(lgc->count_leds * sizeof(lws_led_state_chs_t)),
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__func__);
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int n;
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if (!lcs)
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return NULL;
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lcs->controller = lgc;
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#if defined(LWS_PLAT_TIMER_CREATE)
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lcs->timer = LWS_PLAT_TIMER_CREATE("leds",
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LWS_LED_SEQUENCER_UPDATE_INTERVAL_MS, 1, lcs,
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(TimerCallbackFunction_t)lws_led_timer_cb);
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if (!lcs->timer)
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return NULL;
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#endif
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for (n = 0; n < lgc->count_leds; n++) {
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const lws_led_gpio_map_t *map = &lgc->led_map[n];
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if (map->pwm_ops) {
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lgc->gpio_ops->mode(map->gpio, LWSGGPIO_FL_READ);
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lgc->gpio_ops->set(map->gpio, 0);
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} else {
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lgc->gpio_ops->mode(map->gpio, LWSGGPIO_FL_WRITE);
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lgc->gpio_ops->set(map->gpio,
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!lgc->led_map[n].active_level);
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}
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}
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return lcs;
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}
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void
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lws_led_gpio_destroy(struct lws_led_state *lcs)
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{
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#if defined(LWS_PLAT_TIMER_DELETE)
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LWS_PLAT_TIMER_DELETE(lcs->timer);
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#endif
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lws_free(lcs);
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}
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int
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lws_led_gpio_lookup(const struct lws_led_ops *lo, const char *name)
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{
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const lws_led_gpio_controller_t *lgc = (lws_led_gpio_controller_t *)lo;
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int n;
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for (n = 0; n < lgc->count_leds; n++)
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if (!strcmp(name, lgc->led_map[n].name))
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return n;
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return -1;
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}
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void
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lws_led_gpio_intensity(const struct lws_led_ops *lo, const char *name,
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lws_led_intensity_t inten)
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{
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const lws_led_gpio_controller_t *lgc = (lws_led_gpio_controller_t *)lo;
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int idx = lws_led_gpio_lookup(lo, name);
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const lws_led_gpio_map_t *map;
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if (idx < 0)
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return;
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map = &lgc->led_map[idx];
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if (map->pwm_ops)
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map->pwm_ops->intensity(map->pwm_ops, map->gpio, inten);
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else
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lgc->gpio_ops->set(map->gpio,
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(!!map->active_level) ^ !(inten & 0x8000));
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}
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