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150 lines
4.1 KiB
C
150 lines
4.1 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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typedef struct lws_led_state
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{
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#if defined(LWS_PLAT_FREERTOS)
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TimerHandle_t timer;
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#endif
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lws_led_gpio_controller_t *controller;
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} lws_led_state_t;
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#if defined(LWS_PLAT_FREERTOS)
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static void
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lws_led_timer_cb(TimerHandle_t th)
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{
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// lws_led_state_t *lcs = pvTimerGetTimerID(th);
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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_state_t *lcs = lws_zalloc(sizeof(lws_led_state_t), __func__);
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lws_led_gpio_controller_t *lgc = (lws_led_gpio_controller_t *)led_ops;
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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_FREERTOS)
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lcs->timer = xTimerCreate("leds", 1, 0, lcs,
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(TimerCallbackFunction_t)lws_led_timer_cb);
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#endif
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for (n = 0; n < lgc->count_leds; n++) {
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lgc->gpio_ops->mode(lgc->led_map[n].gpio, LWSGGPIO_FL_WRITE);
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lgc->gpio_ops->set(lgc->led_map[n].gpio,
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!lgc->led_map[n].active_level);
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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_FREERTOS)
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xTimerDelete(&lcs->timer, 0);
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#endif
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lws_free(lcs);
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}
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void
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lws_led_gpio_intensity(const struct lws_led_ops *lo, int idx, 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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const lws_led_gpio_map_t *map = &lgc->led_map[idx];
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lgc->gpio_ops->set(map->gpio, (!!map->active_level) ^ !inten);
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// ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, inten);
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// ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
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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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static const lws_led_intensity_t sineq16[] = {
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0x0000, 0x0191, 0x031e, 0x04a4, 0x061e, 0x0789, 0x08e2, 0x0a24,
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0x0b4e, 0x0c5c, 0x0d4b, 0x0e1a, 0x0ec6, 0x0f4d, 0x0faf, 0x0fea,
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};
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static lws_led_intensity_t sine_lu(int n)
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{
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switch ((n >> 4) & 3) {
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case 1:
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return 4096 + sineq16[n & 15];
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case 2:
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return 4096 + sineq16[15 - (n & 15)];
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case 3:
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return 4096 - sineq16[n & 15];
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default:
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return 4096 - sineq16[15 - (n & 15)];
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}
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}
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/* useful for sine led fade patterns */
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lws_led_intensity_t lws_led_func_sine(int n)
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{
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/*
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* 2: quadrant
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* 4: table entry in quadrant
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* 4: interp (LSB)
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*
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* total 10 bits / 1024 steps per cycle
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*
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* + 0: 0
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* + 256: 4096
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* + 512: 8192
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* + 768: 4096
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* +1023: 0
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*/
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return (sine_lu(n >> 4) * (15 - (n & 15)) +
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sine_lu((n >> 4) + 1) * (n & 15)) / 15;
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}
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const lws_led_sequence_def_t lws_ledseq_sine_wipe = {
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.func = lws_led_func_sine,
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.ledphase_offset = 0, /* already at 0 amp at 0 phase */
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.ledphase_total = 512, /* 180 degree phase ./^ */
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.ms_full_phase = 1000, /* ie, 500ms for 180 degree */
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};
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