70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2017 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __LED_IMX233_H__
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#define __LED_IMX233_H__
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#include "system.h"
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/** LED API
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*
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* The following assumes each single LED is controllable by one
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* or more channels. Each channel is either controlled by a GPIO (on/off) or a
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* PWM. Each channel also has a color, so it is possible to describe
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* a red-green LED for example. */
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/* LED channel color */
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enum imx233_led_color_t
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{
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LED_RED,
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LED_GREEN,
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LED_BLUE,
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};
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/* LED channel */
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struct imx233_led_chan_t
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{
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bool has_pwm; /* GPIO or PWM */
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enum imx233_led_color_t color; /* color */
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int gpio_bank, gpio_pin; /* GPIO bank and pin (also valid for PWM) */
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int pwm_chan; /* for PWM: harware channel*/
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};
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/* LED */
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struct imx233_led_t
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{
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int nr_chan; /* number of channels */
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struct imx233_led_chan_t *chan; /* array of channels */
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};
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/* init: all LEDs are turned off on init */
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void imx233_led_init(void);
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/* get number of LEDs */
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int imx233_led_get_count(void);
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/* return an array of LEDs */
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struct imx233_led_t *imx233_led_get_info(void);
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/* set LED channel on/off, it also works for PWM channel by setting the PWM to
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* constantly off or constantly on */
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void imx233_led_set(int led, int chan, bool on);
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/* set LED PWM: control the frequency and the duty cycle percentage (0-100) */
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void imx233_led_set_pwm(int led, int chan, int freq, int duty);
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#endif /* __LED_IMX233_H__ */
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